Moved all actions to coa4u namespace.

Added methods caching for quick message processing.
Integrated MeshActor into Actor.

new Actions:
ActionStop.cs
ActionSetDirection.cs

README.md

@@ -63,8 +63,6 @@ Base actions
 Interval actions
 - [ ] Follow - follows another actor with the given speed for the given amount of time (of forever).
 - [ ] LookAt - rotates the object to look at the given actor.
-
-*These two actions requires the using of MeshActor script instead of Actor.*
 - [x]  SkewBy - skews the mesh by given values.
 - [ ]  SkewTo - skews the mesh to the given values.
 

src/ActionsBase/Action.cs

@@ -2,80 +2,124 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-public class Action
+namespace coa4u
 {
-    protected Actor target;
-    public float duration = 0;
-    protected Transform transform;
-    protected Renderer renderer;
-    protected bool is2d = false;
-
-    public Action()
-    {
-    }
-
-    public virtual Action clone()
-    {
-        return new Action();
-    }
-
-    public virtual bool isRunning()
-    {
-        return false;
-    }
-
     /// <summary>
-    /// This method is called at the action start. Usable for instant and interval actions.
+    /// Basic action class for subclassing. To inherit interval actions, consider using the ActionInterval as the base class.
     /// </summary>
-    public virtual Action reverse()
+    public class ActionInstant
     {
-        throw new Exception("Can reverse only the reversable interval actions");
-    }
+        protected Actor target;
+        protected Transform transform;
+        protected Renderer renderer;
+        protected bool is2d = false;
+        private float durationValue = 0;
+        private float dtrValue = 0;
+        private bool isRunning = false;
 
-    /// <summary>
-    /// This method is called at the action start. Usable for instant and interval actions.
-    /// </summary>
-    public virtual void start()
-    {
-        if (target == null)
-            throw new Exception("Can start the action only after it's atached to the actor");
-        transform = target.gameObject.transform;
-        renderer = target.gameObject.renderer;
-    }
-
-    /// <summary>
-    /// This method is called at every frame update. Not usable for instant actions.
-    /// </summary>
-    public virtual void step(float dt)
-    {
-        if (target == null)
-            throw new Exception("Can update the action only after it's atached to the actor");
-    }
-
-    /// <summary>
-    /// This method is called after the interval action is stopped. Not usable for instant actions.
-    /// </summary>
-    public virtual void stop()
-    {
-        if (target == null)
-            throw new Exception("Can stop the action only after it's atached to the actor");
-    }
-
-    public void setActor(Actor actor)
-    {
-        target = actor;
-    }
-
-    public virtual float dtr
-    {
-        get
-        {
-            return 0;
-        }
-
-        protected set
+        public ActionInstant()
         {
         }
-    }
 
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public virtual ActionInstant clone()
+        {
+            return new ActionInstant();
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public virtual ActionInstant reverse()
+        {
+            throw new Exception("Can reverse only the reversable interval actions");
+        }
+
+        /// <summary>
+        /// This method is called at the action start. Usable for instant and interval actions.
+        /// </summary>
+        public virtual void start()
+        {
+            if (target == null)
+                throw new Exception("Can start the action only after it's atached to the actor");
+            transform = target.transformCached;
+            renderer = target.rendererCached;
+        }
+
+        /// <summary>
+        /// This method is called at every frame update. Not usable for instant actions.
+        /// </summary>
+        public virtual void step(float dt)
+        {
+            if (target == null)
+                throw new Exception("Can update the action only after it's atached to the actor");
+        }
+
+        /// <summary>
+        /// This method is called after the interval action is stopped. Not usable for instant actions.
+        /// </summary>
+        public virtual void stop()
+        {
+            if (target == null)
+                throw new Exception("Can stop the action only after it's atached to the actor");
+        }
+
+        /// <summary>
+        /// This method sets the actor for the action.
+        /// </summary>
+        public void setActor(Actor actor)
+        {
+            target = actor;
+        }
+
+        /// <summary>
+        /// Readonly property. Shows the remaining time of the action.
+        /// </summary>
+        public float duration
+        {
+            get
+            {
+                return durationValue;
+            }
+
+            protected set
+            {
+                durationValue = value;
+            }
+        }
+
+        /// <summary>
+        /// Readonly property. Shows if the action is running or not.
+        /// </summary>
+        public bool running
+        {
+            get
+            {
+                return isRunning;
+            }
+
+            protected set
+            {
+                isRunning = value;
+            }
+        }
+
+        /// <summary>
+        /// Readonly property. Contains the remaining tick time after action finished.
+        /// </summary>
+        public float dtr
+        {
+            get
+            {
+                return dtrValue;
+            }
+
+            protected set
+            {
+                dtrValue = value;
+            }
+        }
+    }
 }

src/ActionsBase/ActionInterval.cs

@@ -2,102 +2,98 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionInterval : Action
+namespace coa4u
 {
-    protected float timer;
-    protected float timeScale;
-    protected bool running;
-    private float dtrdata;
-
-    public ActionInterval(float tgtDuration)
-        : base()
-    {
-        duration = tgtDuration;
-        timeScale = 1F;
-        dtr = 0;
-    }
-
-    public override Action clone()
-    {
-        return new ActionInterval(duration);
-    }
-
-    public override Action reverse()
-    {
-        throw new Exception("Can reverse only the reversable interval actions");
-    }
-
-    public override bool isRunning()
-    {
-        return running;
-    }
-
-    public override void start()
-    {
-        base.start();
-        running = true;
-        timer = 0F;
-    }
-
-    public override void stop()
-    {
-        base.stop();
-        running = false;
-    }
-
     /// <summary>
-    /// Step method for interval actions. Don't override this method, when inheriting, put your code in stepInterval instead.
+    /// Interval action class for subclassing.
     /// </summary>
-    public override void step(float dt)
+    public class ActionInterval : ActionInstant
     {
-        dt *= timeScale;
-        base.step(dt);
-        if (timer + dt > duration)
-        {
-            float odt = dt;
-            dt = duration - timer;
-            timer += odt;
-        }
-        else
-        {
-            timer += dt;
-        }
-        stepInterval(dt);
-        if (timer > duration)
-        {
-            stop();
-            dtr = timer - duration;
-        }
-    }
+        protected float timer;
+        protected float timeScale;
+        private float dtrdata;
 
-    /// <summary>
-    /// Step method for interval actions. Put your code here.
-    /// </summary>
-    public virtual void stepInterval(float dt)
-    {
-    }
-
-    /// <summary>
-    /// Property to get the remaining tick time after the action has ended.
-    /// </summary>
-    public override float dtr
-    {
-        get
+        public ActionInterval(float tgtDuration)
+            : base()
         {
-            return dtrdata;
+            duration = tgtDuration;
+            timeScale = 1F;
+            dtr = 0;
         }
 
-        protected set
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
         {
-            dtrdata = value;
+            return new ActionInterval(duration);
         }
-    }
 
-    /// <summary>
-    /// Immediately changes the time scale for this action and all nested ones.
-    /// </summary>
-    public void setTimeScale(float ts)
-    {
-        timeScale = ts;
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            throw new Exception("Can reverse only the reversable interval actions");
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            running = true;
+            timer = 0F;
+        }
+
+        /// <summary>
+        /// This method is called after the interval action is stopped.
+        /// </summary>
+        public override void stop()
+        {
+            base.stop();
+            running = false;
+        }
+
+        /// <summary>
+        /// This method is called every frame update. Don't override this method, when inheriting, put your code in stepInterval instead.
+        /// </summary>
+        public override void step(float dt)
+        {
+            dt *= timeScale;
+            base.step(dt);
+            if (timer + dt > duration)
+            {
+                float odt = dt;
+                dt = duration - timer;
+                timer += odt;
+            }
+            else
+            {
+                timer += dt;
+            }
+            stepInterval(dt);
+            if (timer > duration)
+            {
+                stop();
+                dtr = timer - duration;
+            }
+        }
+
+        /// <summary>
+        /// This method is called every frame update. Put your code here.
+        /// </summary>
+        public virtual void stepInterval(float dt)
+        {
+        }
+
+        /// <summary>
+        /// Immediately changes the time scale for this action and all nested ones.
+        /// </summary>
+        public void setTimeScale(float ts)
+        {
+            timeScale = ts;
+        }
     }
 }

src/ActionsBase/ActionParallel.cs

@@ -2,84 +2,105 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionParallel : ActionInterval
+namespace coa4u
 {
-    protected Action[] actions;
-
-    public ActionParallel(Action action1, Action action2)
-        : base(0)
+    /// <summary>
+    /// Runs several actions at the same time.
+    /// </summary>
+    public class ActionParallel : ActionInterval
     {
-        actions = new Action[] {action1, action2};
-    }
+        protected ActionInstant[] actions;
 
-    public ActionParallel(Action[] actionsList)
-        : base(0)
-    {
-        actions = actionsList;
-
-    }
-
-    public override Action clone()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionParallel(ActionInstant action1, ActionInstant action2)
+            : base(0)
         {
-            aList[i] = actions[i].clone();
+            actions = new ActionInstant[] { action1, action2 };
         }
-        return new ActionSequence(aList);
-    }
 
-    public override Action reverse()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionParallel(ActionInstant[] actionsList)
+            : base(0)
         {
-            aList[i] = actions[i].reverse();
-        }
-        return new ActionSequence(aList);
-    }
+            actions = actionsList;
 
-    public override void start()
-    {
-        base.start();
-        for (int i = 0; i < actions.Length; i++)
-        {
-            actions[i].setActor(target);
-            actions[i].start();
         }
-    }
 
-    public override void step(float dt)
-    {
-        dt *= timeScale;
-        for (int i = 0; i < actions.Length; i++)
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
         {
-            if (actions[i].isRunning())
-                actions[i].step(dt);
-        }
-        bool canStopNow = true;
-        float dtrdata = 0;
-        for (int i = 0; i < actions.Length; i++)
-        {
-            if (actions[i].isRunning())
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
             {
-                canStopNow = false;
-                dtrdata = Math.Max(actions[i].dtr, dtrdata);
+                aList[i] = actions[i].clone();
+            }
+            return new ActionSequence(aList);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
+            {
+                aList[i] = actions[i].reverse();
+            }
+            return new ActionSequence(aList);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            for (int i = 0; i < actions.Length; i++)
+            {
+                actions[i].setActor(target);
+                actions[i].start();
             }
         }
-        if (canStopNow)
-        {
-            stop();
-            dtr = dtrdata;
-        }
-    }
 
-    public override void stop()
-    {
-        base.stop();
-        for (int i = 0; i < actions.Length; i++)
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void step(float dt)
         {
-            actions[i].stop();
+            dt *= timeScale;
+            for (int i = 0; i < actions.Length; i++)
+            {
+                if (actions[i].running)
+                    actions[i].step(dt);
+            }
+            bool canStopNow = true;
+            float dtrdata = 0;
+            for (int i = 0; i < actions.Length; i++)
+            {
+                if (actions[i].running)
+                {
+                    canStopNow = false;
+                    dtrdata = Math.Max(actions[i].dtr, dtrdata);
+                }
+            }
+            if (canStopNow)
+            {
+                stop();
+                dtr = dtrdata;
+            }
+        }
+
+        /// <summary>
+        /// This method is called after the interval action is stopped.
+        /// </summary>
+        public override void stop()
+        {
+            base.stop();
+            for (int i = 0; i < actions.Length; i++)
+            {
+                actions[i].stop();
+            }
         }
     }
 }

src/ActionsBase/ActionRandom.cs

@@ -2,68 +2,89 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionRandom : ActionInterval
+namespace coa4u
 {
-
-    protected Action[] actions;
-    protected int index;
-
-    public ActionRandom(Action action1, Action action2)
-        : base(0)
+    /// <summary>
+    /// Runs one random action from the given list.
+    /// </summary>
+    class ActionRandom : ActionInterval
     {
-        actions = new Action[] {action1, action2};
-    }
 
-    public ActionRandom(Action[] actionsList)
-        : base(0)
-    {
-        actions = actionsList;
+        protected ActionInstant[] actions;
+        protected int index;
 
-    }
-
-    public override Action clone()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionRandom(ActionInstant action1, ActionInstant action2)
+            : base(0)
         {
-            aList[i] = actions[i].clone();
+            actions = new ActionInstant[] { action1, action2 };
         }
-        return new ActionRandom(aList);
-    }
 
-    public override Action reverse()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionRandom(ActionInstant[] actionsList)
+            : base(0)
         {
-            aList[i] = actions[i].reverse();
+            actions = actionsList;
+
         }
-        return new ActionRandom(aList);
-    }
 
-    public override void start()
-    {
-        base.start();
-        index = UnityEngine.Random.Range(0, actions.Length);
-        actions[index].setActor(target);
-        actions[index].start();
-    }
-
-    public override void step(float dt)
-    {
-        dt *= timeScale;
-        if (actions[index].isRunning())
-            actions[index].step(dt);
-        if (!actions[index].isRunning())
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
         {
-            stop();
-            dtr = actions[index].dtr;
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
+            {
+                aList[i] = actions[i].clone();
+            }
+            return new ActionRandom(aList);
         }
-    }
 
-    public override void stop()
-    {
-        base.stop();
-        actions[index].stop();
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
+            {
+                aList[i] = actions[i].reverse();
+            }
+            return new ActionRandom(aList);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            index = UnityEngine.Random.Range(0, actions.Length);
+            actions[index].setActor(target);
+            actions[index].start();
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void step(float dt)
+        {
+            dt *= timeScale;
+            if (actions[index].running)
+                actions[index].step(dt);
+            if (!actions[index].running)
+            {
+                stop();
+                dtr = actions[index].dtr;
+            }
+        }
+
+        /// <summary>
+        /// This method is called after the interval action is stopped.
+        /// </summary>
+        public override void stop()
+        {
+            base.stop();
+            actions[index].stop();
+        }
     }
 }

src/ActionsBase/ActionRepeat.cs

@@ -2,68 +2,86 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionRepeat : ActionInterval
+namespace coa4u
 {
-    protected ActionInterval action;
-    protected int count;
-    protected int counter;
-    protected bool forever;
-
-    public ActionRepeat(ActionInterval tgtAction, int tgtCount)
-        : base(0)
+    /// <summary>
+    /// Runs the given action the several times. Also can repeat the action forever.
+    /// </summary>
+    class ActionRepeat : ActionInterval
     {
-        action = tgtAction;
-        count = tgtCount;
-        counter = 0;
-        forever = false;
-    }
+        protected ActionInterval action;
+        protected int count;
+        protected int counter;
+        protected bool forever;
 
-    public ActionRepeat(ActionInterval tgtAction)
-        : base(0)
-    {
-        action = tgtAction;
-        count = 0;
-        counter = 0;
-        forever = true;
-    }
-
-    public override Action clone()
-    {
-        return new ActionRepeat((ActionInterval) action.clone(), count);
-    }
-
-    public override Action reverse()
-    {
-        return new ActionRepeat((ActionInterval) action.reverse(), count);
-    }
-
-    public override void start()
-    {
-        base.start();
-        action.setActor(target);
-        action.start();
-        counter = 0;
-    }
-
-    public override void step(float dt)
-    {
-        dt *= timeScale;
-        if (action.isRunning())
+        public ActionRepeat(ActionInterval tgtAction, int tgtCount)
+            : base(0)
         {
-            action.step(dt);
+            action = tgtAction;
+            count = tgtCount;
+            counter = 0;
+            forever = false;
         }
-        if (!action.isRunning() && (forever || counter < count - 1))
+
+        public ActionRepeat(ActionInterval tgtAction)
+            : base(0)
         {
-            float dtrdata = action.dtr;
+            action = tgtAction;
+            count = 0;
+            counter = 0;
+            forever = true;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionRepeat((ActionInterval)action.clone(), count);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionRepeat((ActionInterval)action.reverse(), count);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            action.setActor(target);
             action.start();
-            if (dtrdata > 0)
-                action.step(dtrdata);
-            counter += 1;
+            counter = 0;
         }
-        else if (!action.isRunning() && counter >= count - 1)
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void step(float dt)
         {
-            dtr = action.dtr;
-            stop();
+            dt *= timeScale;
+            if (action.running)
+            {
+                action.step(dt);
+            }
+            if (!action.running && (forever || counter < count - 1))
+            {
+                float dtrdata = action.dtr;
+                action.start();
+                if (dtrdata > 0)
+                    action.step(dtrdata);
+                counter += 1;
+            }
+            else if (!action.running && counter >= count - 1)
+            {
+                dtr = action.dtr;
+                stop();
+            }
         }
     }
 }

src/ActionsBase/ActionSequence.cs

@@ -2,89 +2,110 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSequence : ActionInterval
+namespace coa4u
 {
-    protected Action[] actions;
-    protected int index;
-
-    public ActionSequence(Action action1, Action action2)
-        : base(0)
+    /// <summary>
+    /// Runs several actions in a sequence.
+    /// </summary>
+    class ActionSequence : ActionInterval
     {
-        actions = new Action[] {action1, action2};
-    }
+        protected ActionInstant[] actions;
+        protected int index;
 
-    public ActionSequence(Action[] actionsList)
-        : base(0)
-    {
-        actions = actionsList;
-
-    }
-
-    public override Action clone()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionSequence(ActionInstant action1, ActionInstant action2)
+            : base(0)
         {
-            aList[i] = actions[i].clone();
+            actions = new ActionInstant[] { action1, action2 };
         }
-        return new ActionSequence(aList);
-    }
 
-    public override Action reverse()
-    {
-        Action[] aList = new Action[actions.Length];
-        for (int i = 0; i < actions.Length; i++)
+        public ActionSequence(ActionInstant[] actionsList)
+            : base(0)
         {
-            aList[actions.Length - 1 - i] = actions[i].reverse();
-        }
-        return new ActionSequence(aList);
-    }
+            actions = actionsList;
 
-    public override void start()
-    {
-        base.start();
-        index = 0;
-        actions[0].setActor(target);
-        actions[0].start();
-        while (!actions[index].isRunning() && index < actions.Length)
-        {
-            index += 1;
-            actions[index].setActor(target);
-            actions[index].start();
         }
-    }
 
-    public override void step(float dt)
-    {
-        dt *= timeScale;
-        float dtrdata = 0;
-        if (actions[index].isRunning())
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
         {
-            actions[index].step(dt);
-            if (!actions[index].isRunning())
-                dtrdata = actions[index].dtr;
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
+            {
+                aList[i] = actions[i].clone();
+            }
+            return new ActionSequence(aList);
         }
-        while (!actions[index].isRunning() && index < actions.Length - 1)
-        {
-            index += 1;
-            actions[index].setActor(target);
-            actions[index].start();
-            if (actions[index].isRunning() && dtrdata > 0)
-                actions[index].step(dtrdata);
-        }
-        if (!actions[index].isRunning())
-        {
-            stop();
-            dtr = dtrdata;
-        }
-    }
 
-    public override void stop()
-    {
-        base.stop();
-        for (int i = 0; i < actions.Length; i++)
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
         {
-            actions[i].stop();
+            ActionInstant[] aList = new ActionInstant[actions.Length];
+            for (int i = 0; i < actions.Length; i++)
+            {
+                aList[actions.Length - 1 - i] = actions[i].reverse();
+            }
+            return new ActionSequence(aList);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            index = 0;
+            actions[0].setActor(target);
+            actions[0].start();
+            while (!actions[index].running && index < actions.Length)
+            {
+                index += 1;
+                actions[index].setActor(target);
+                actions[index].start();
+            }
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void step(float dt)
+        {
+            dt *= timeScale;
+            float dtrdata = 0;
+            if (actions[index].running)
+            {
+                actions[index].step(dt);
+                if (!actions[index].running)
+                    dtrdata = actions[index].dtr;
+            }
+            while (!actions[index].running && index < actions.Length - 1)
+            {
+                index += 1;
+                actions[index].setActor(target);
+                actions[index].start();
+                if (actions[index].running && dtrdata > 0)
+                    actions[index].step(dtrdata);
+            }
+            if (!actions[index].running)
+            {
+                stop();
+                dtr = dtrdata;
+            }
+        }
+
+        /// <summary>
+        /// This method is called after the interval action is stopped.
+        /// </summary>
+        public override void stop()
+        {
+            base.stop();
+            for (int i = 0; i < actions.Length; i++)
+            {
+                actions[i].stop();
+            }
         }
     }
 }

src/ActionsBase/ActionStop.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace coa4u
+{
+    /// <summary>
+    /// This action stops all actions for the current target.
+    /// </summary>
+    class ActionStop : ActionInstant
+    {
+        public ActionStop()
+            : base()
+        {
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionStop();
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            target.StopAction();
+        }
+    }
+}

src/ActionsInstant/ActionHide.cs

@@ -2,22 +2,42 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionHide : Action
+namespace coa4u
 {
-
-    public ActionHide()
-        : base()
+    /// <summary>
+    /// Instantly hides the target. This action does not require the transparency support in shaders.
+    /// </summary>
+    class ActionHide : ActionInstant
     {
-    }
 
-    public override Action clone()
-    {
-        return new ActionHide();
-    }
+        public ActionHide()
+            : base()
+        {
+        }
 
-    public override void start()
-    {
-        base.start();
-        renderer.enabled = false;
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionHide();
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionShow();
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            renderer.enabled = false;
+        }
     }
 }

src/ActionsInstant/ActionLog.cs

@@ -2,19 +2,44 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionLog : Action
+namespace coa4u
 {
-    string message;
-
-    public ActionLog(string tgtMessage)
-        : base()
+    /// <summary>
+    /// Prints a message in Unity debug console.
+    /// </summary>
+    class ActionLog : ActionInstant
     {
-        message = tgtMessage;
-    }
+        string message;
 
-    public override void start()
-    {
-        base.start();
-        Debug.Log(message);
+        public ActionLog(string tgtMessage)
+            : base()
+        {
+            message = tgtMessage;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionLog(message);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionLog(message);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            Debug.Log(message);
+        }
     }
 }

src/ActionsInstant/ActionSendMessage.cs

@@ -2,43 +2,70 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSendMessage : Action
+namespace coa4u
 {
-    protected string message;
-    protected object param;
-    protected SendMessageOptions options = SendMessageOptions.DontRequireReceiver;
-
-    public ActionSendMessage(string tgtMessage)
-        : base()
+    /// <summary>
+    /// Sends the message to the current target. First, it checks the Actor's methods cache.
+    /// If the receiving method found in cache, it will be called directly without passing the message to the GameObject.
+    /// If there's no listener in cache, message will be sent GameObject (and Unity does it VERY slow).
+    /// </summary>
+    class ActionSendMessage : ActionInstant
     {
-        message = tgtMessage;
-    }
+        protected string message;
+        protected object param;
+        protected SendMessageOptions options = SendMessageOptions.DontRequireReceiver;
 
-    public ActionSendMessage(string tgtMessage, object tgtParam)
-        : base()
-    {
-        message = tgtMessage;
-        param = tgtParam;
-    }
-
-    public ActionSendMessage(string tgtMessage, object tgtParam, SendMessageOptions tgtOptions)
-        : base()
-    {
-        message = tgtMessage;
-        param = tgtParam;
-        options = tgtOptions;
-    }
-
-    public override void start()
-    {
-        base.start();
-        if (param != null)
+        public ActionSendMessage(string tgtMessage)
+            : base()
         {
-            target.SendMessage(message, param);
+            message = tgtMessage;
         }
-        else
+
+        public ActionSendMessage(string tgtMessage, object tgtParam)
+            : base()
         {
-            target.SendMessage(message);
+            message = tgtMessage;
+            param = tgtParam;
+        }
+
+        public ActionSendMessage(string tgtMessage, object tgtParam, SendMessageOptions tgtOptions)
+            : base()
+        {
+            message = tgtMessage;
+            param = tgtParam;
+            options = tgtOptions;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionSendMessage(message, param, options);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionSendMessage(message, param, options);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            if (param != null)
+            {
+                target.ReceiveMessage(message, param, options);
+            }
+            else
+            {
+                target.ReceiveMessage(message, options);
+            }
         }
     }
 }

src/ActionsInstant/ActionSetDirection.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace coa4u
+{
+    /// <summary>
+    /// Instantly rotates the target to face the given point or actor.
+    /// </summary>
+    class ActionSetDirection : ActionInstant
+    {
+        protected Vector3 value;
+        protected Actor other;
+
+        public ActionSetDirection(Vector3 tgtValue)
+            : base()
+        {
+            value = tgtValue;
+        }
+
+        public ActionSetDirection(Vector2 tgtValue)
+            : this((Vector3)tgtValue)
+        {
+            is2d = true;
+        }
+
+        public ActionSetDirection(Actor tgtActor)
+            : base()
+        {
+            other = tgtActor;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionSetDirection(value);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            if (other != null)
+            {
+                value = other.transform.position;
+            }
+            if (is2d)
+            {
+                value.z = transform.position.z;
+            }
+            transform.rotation = Quaternion.LookRotation(transform.position - value);
+        }
+    }
+}

src/ActionsInstant/ActionSetPlace.cs

@@ -2,32 +2,44 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSetPlace : Action
+namespace coa4u
 {
-    protected Vector3 value;
-
-    public ActionSetPlace(Vector3 tgtPlace)
-        : base()
+    /// <summary>
+    /// Instantly moves the target to the given point.
+    /// </summary>
+    class ActionSetPlace : ActionInstant
     {
-        value = tgtPlace;
-    }
+        protected Vector3 value;
 
-    public ActionSetPlace(Vector2 tgtPlace)
-        : this((Vector3) tgtPlace)
-    {
-        is2d = true;
-    }
+        public ActionSetPlace(Vector3 tgtPlace)
+            : base()
+        {
+            value = tgtPlace;
+        }
 
-    public override Action clone()
-    {
-        return new ActionSetPlace(value);
-    }
+        public ActionSetPlace(Vector2 tgtPlace)
+            : this((Vector3)tgtPlace)
+        {
+            is2d = true;
+        }
 
-    public override void start()
-    {
-        base.start();
-        if (is2d)
-            value.z = transform.position.z;
-        transform.position = value;
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionSetPlace(value);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            if (is2d)
+                value.z = transform.position.z;
+            transform.position = value;
+        }
     }
 }

src/ActionsInstant/ActionSetRotation.cs

@@ -2,31 +2,42 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSetRotation : Action
+namespace coa4u
 {
-    protected Vector3 value;
-
-    public ActionSetRotation(Vector3 tgtValue)
-        : base()
+    /// <summary>
+    /// Instantly rotates the target.
+    /// </summary>
+    class ActionSetRotation : ActionInstant
     {
-        value = tgtValue;
-    }
+        protected Vector3 value;
 
-    public ActionSetRotation(float angle)
-        : this(new Vector3(0, 0, angle))
-    {
-        is2d = true;
-    }
+        public ActionSetRotation(Vector3 tgtValue)
+            : base()
+        {
+            value = tgtValue;
+        }
 
-    public override Action clone()
-    {
-        return new ActionSetRotation(value);
-    }
+        public ActionSetRotation(float angle)
+            : this(new Vector3(0, 0, angle))
+        {
+            is2d = true;
+        }
 
-    public override void start()
-    {
-        base.start();
-        transform.rotation = Quaternion.Euler(value);
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionSetRotation(value);
+        }
 
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            transform.rotation = Quaternion.Euler(value);
+        }
     }
 }

src/ActionsInstant/ActionSetTint.cs

@@ -2,20 +2,37 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSetTint : Action
+namespace coa4u
 {
-    public Vector4 color;
-    protected const float coeff = 1F / 255F;
-
-    public ActionSetTint(Vector4 tgtColor)
-        : base()
+    /// <summary>
+    /// Instantly tints the target to the given color.
+    /// </summary>
+    class ActionSetTint : ActionInstant
     {
-        color = tgtColor * coeff;
-    }
+        public Vector4 color;
+        protected const float coeff = 1F / 255F;
 
-    public override void start()
-    {
-        base.start();
-        renderer.material.color = new Color(color[0], color[1], color[2], color[3]);
+        public ActionSetTint(Vector4 tgtColor)
+            : base()
+        {
+            color = tgtColor * coeff;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionSetTint(color * 255F);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            renderer.material.color = new Color(color[0], color[1], color[2], color[3]);
+        }
     }
 }

src/ActionsInstant/ActionShow.cs

@@ -2,22 +2,42 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionShow : Action
+namespace coa4u
 {
-
-    public ActionShow()
-        : base()
+    /// <summary>
+    /// Instantly shows the hidden target. This action does not require the transparency support in shaders.
+    /// </summary>
+    class ActionShow : ActionInstant
     {
-    }
 
-    public override Action clone()
-    {
-        return new ActionShow();
-    }
+        public ActionShow()
+            : base()
+        {
+        }
 
-    public override void start()
-    {
-        base.start();
-        renderer.enabled = true;
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionShow();
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionHide();
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            renderer.enabled = true;
+        }
     }
 }

src/ActionsInstant/ActionToggleVisibility.cs

@@ -2,17 +2,42 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionToggleVisibility : Action
+namespace coa4u
 {
-
-    public ActionToggleVisibility()
-        : base()
+    /// <summary>
+    /// Instantly hides the target or showes it, if it's hidden. This action does not require the transparency support in shaders.
+    /// </summary>
+    class ActionToggleVisibility : ActionInstant
     {
-    }
 
-    public override void start()
-    {
-        base.start();
-        renderer.enabled = !renderer.enabled;
+        public ActionToggleVisibility()
+            : base()
+        {
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionToggleVisibility();
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionToggleVisibility();
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            renderer.enabled = !renderer.enabled;
+        }
     }
 }

src/ActionsInterval/ActionBezierAbs.cs

@@ -2,58 +2,76 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionBezierAbs : ActionInterval
+namespace coa4u
 {
-    protected Vector3 startPoint;
-    protected Vector3 endPoint;
-    protected Vector3 startControlPoint;
-    protected Vector3 endControlPoint;
-
-    public ActionBezierAbs(Vector3 tgtStart, Vector3 tgtSCP, Vector3 tgtECP, Vector3 tgtEnd, float tgtDuration)
-        : base(tgtDuration)
+    /// <summary>
+    /// Moves the target with a cubic Bezier in absolute coordinates (if the target is not in the start point, it'll be positioned there when the action starts).
+    /// </summary>
+    class ActionBezierAbs : ActionInterval
     {
-        startPoint = tgtStart;
-        endPoint = tgtEnd;
-        startControlPoint = tgtSCP;
-        endControlPoint = tgtECP;
-    }
+        protected Vector3 startPoint;
+        protected Vector3 endPoint;
+        protected Vector3 startControlPoint;
+        protected Vector3 endControlPoint;
 
-    public ActionBezierAbs(Vector2 tgtStart, Vector2 tgtSCP, Vector2 tgtECP, Vector2 tgtEnd, float tgtDuration)
-        : this((Vector3) tgtStart, (Vector3) tgtSCP, (Vector3) tgtECP, (Vector3) tgtEnd, tgtDuration)
-    {
-        is2d = true;
-    }
-
-    public override Action clone()
-    {
-        return new ActionBezierAbs(startPoint, startControlPoint, endControlPoint, endPoint, duration);
-    }
-
-    public override Action reverse()
-    {
-        return new ActionBezierAbs(endPoint, endControlPoint, startControlPoint, startPoint, duration);
-    }
-
-    public override void start()
-    {
-        base.start();
-        float z = transform.position.z;
-        if (is2d)
+        public ActionBezierAbs(Vector3 tgtStart, Vector3 tgtSCP, Vector3 tgtECP, Vector3 tgtEnd, float tgtDuration)
+            : base(tgtDuration)
         {
-            startPoint.z = z;
-            endPoint.z = z;
-            startControlPoint.z = z;
-            endControlPoint.z = z;
+            startPoint = tgtStart;
+            endPoint = tgtEnd;
+            startControlPoint = tgtSCP;
+            endControlPoint = tgtECP;
+        }
+
+        public ActionBezierAbs(Vector2 tgtStart, Vector2 tgtSCP, Vector2 tgtECP, Vector2 tgtEnd, float tgtDuration)
+            : this((Vector3)tgtStart, (Vector3)tgtSCP, (Vector3)tgtECP, (Vector3)tgtEnd, tgtDuration)
+        {
+            is2d = true;
+        }
+
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionBezierAbs(startPoint, startControlPoint, endControlPoint, endPoint, duration);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionBezierAbs(endPoint, endControlPoint, startControlPoint, startPoint, duration);
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            float z = transform.position.z;
+            if (is2d)
+            {
+                startPoint.z = z;
+                endPoint.z = z;
+                startControlPoint.z = z;
+                endControlPoint.z = z;
+            }
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void stepInterval(float dt)
+        {
+            float t = timer / duration;
+            Vector3 newPosition = (((-startPoint
+                + 3 * (startControlPoint - endControlPoint) + endPoint) * t
+                + (3 * (startPoint + endControlPoint) - 6 * startControlPoint)) * t +
+                3 * (startControlPoint - startPoint)) * t + startPoint;
+            transform.position = newPosition;
         }
     }
-
-    public override void stepInterval(float dt)
-    {
-        float t = timer / duration;
-        Vector3 newPosition = (((-startPoint
-            + 3 * (startControlPoint - endControlPoint) + endPoint) * t
-            + (3 * (startPoint + endControlPoint) - 6 * startControlPoint)) * t +
-            3 * (startControlPoint - startPoint)) * t + startPoint;
-        transform.position = newPosition;
-    }
 }

src/ActionsInterval/ActionBezierRel.cs

@@ -2,56 +2,74 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionBezierRel : ActionInterval
+namespace coa4u
 {
-    protected Vector3 ep;
-    protected Vector3 cp1;
-    protected Vector3 cp2;
-    protected Vector3 startPoint;
-    protected Vector3 endPoint;
-    protected Vector3 startControlPoint;
-    protected Vector3 endControlPoint;
-
-    public ActionBezierRel(Vector3 tgtSCP, Vector3 tgtECP, Vector3 tgtEnd, float tgtDuration)
-        : base(tgtDuration)
+    /// <summary>
+    /// Moves the target with a cubic Bezier in relative coordinates.
+    /// </summary>
+    class ActionBezierRel : ActionInterval
     {
-        ep = tgtEnd;
-        cp1 = tgtSCP;
-        cp2 = tgtECP;
-    }
+        protected Vector3 ep;
+        protected Vector3 cp1;
+        protected Vector3 cp2;
+        protected Vector3 startPoint;
+        protected Vector3 endPoint;
+        protected Vector3 startControlPoint;
+        protected Vector3 endControlPoint;
 
-    public ActionBezierRel(Vector2 tgtSCP, Vector2 tgtECP, Vector2 tgtEnd, float tgtDuration)
-        : this((Vector3)tgtSCP, (Vector3)tgtECP, (Vector3)tgtEnd, tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionBezierRel(Vector3 tgtSCP, Vector3 tgtECP, Vector3 tgtEnd, float tgtDuration)
+            : base(tgtDuration)
+        {
+            ep = tgtEnd;
+            cp1 = tgtSCP;
+            cp2 = tgtECP;
+        }
 
-    public override Action clone()
-    {
-        return new ActionBezierRel(startControlPoint, endControlPoint, endPoint, duration);
-    }
+        public ActionBezierRel(Vector2 tgtSCP, Vector2 tgtECP, Vector2 tgtEnd, float tgtDuration)
+            : this((Vector3)tgtSCP, (Vector3)tgtECP, (Vector3)tgtEnd, tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override Action reverse()
-    {
-        return new ActionBezierRel(-startControlPoint, -endControlPoint, -endPoint, duration);
-    }
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionBezierRel(startControlPoint, endControlPoint, endPoint, duration);
+        }
 
-    public override void start()
-    {
-        base.start();
-        startPoint = target.transform.position;
-        endPoint = startPoint + ep;
-        startControlPoint = startPoint + cp1;
-        endControlPoint = startControlPoint + cp2;
-    }
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionBezierRel(-startControlPoint, -endControlPoint, -endPoint, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float t = timer / duration;
-        Vector3 newPosition = (((-startPoint
-            + 3 * (startControlPoint - endControlPoint) + endPoint) * t
-            + (3 * (startPoint + endControlPoint) - 6 * startControlPoint)) * t +
-            3 * (startControlPoint - startPoint)) * t + startPoint;
-        transform.position = newPosition;
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            startPoint = target.transform.position;
+            endPoint = startPoint + ep;
+            startControlPoint = startPoint + cp1;
+            endControlPoint = startControlPoint + cp2;
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void stepInterval(float dt)
+        {
+            float t = timer / duration;
+            Vector3 newPosition = (((-startPoint
+                + 3 * (startControlPoint - endControlPoint) + endPoint) * t
+                + (3 * (startPoint + endControlPoint) - 6 * startControlPoint)) * t +
+                3 * (startControlPoint - startPoint)) * t + startPoint;
+            transform.position = newPosition;
+        }
     }
 }

src/ActionsInterval/ActionBlink.cs

@@ -2,49 +2,61 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionBlink : ActionRepeat
+namespace coa4u
 {
-    protected bool randomDelay;
-    protected ActionDelay delay = new ActionDelay(0);
-    protected Action[] blinkSeq;
-    protected float durationMin;
-    protected float durationMax;
-
-    public ActionBlink(int tgtBlinks, float tgtDuration)
-        : base(null, 0)
+    /// <summary>
+    /// Blinks the target.
+    /// </summary>
+    class ActionBlink : ActionRepeat
     {
-        durationMin = tgtDuration;
-        durationMax = tgtDuration;
-        count = (tgtBlinks) * 2;
-        blinkSeq = new Action[]
+        protected bool randomDelay;
+        protected ActionDelay delay = new ActionDelay(0);
+        protected ActionInstant[] blinkSeq;
+        protected float durationMin;
+        protected float durationMax;
+
+        public ActionBlink(int tgtBlinks, float tgtDuration)
+            : base(null, 0)
+        {
+            durationMin = tgtDuration;
+            durationMax = tgtDuration;
+            count = (tgtBlinks) * 2;
+            blinkSeq = new ActionInstant[]
         {
             new ActionToggleVisibility(),
             new ActionDelay(tgtDuration / tgtBlinks)
         };
-        action = new ActionSequence(blinkSeq);
-    }
+            action = new ActionSequence(blinkSeq);
+        }
 
-    public ActionBlink(int tgtBlinks, float tgtDurationMin, float tgtDurationMax)
-        : base(null, 0)
-    {
-        durationMin = tgtDurationMin;
-        durationMax = tgtDurationMax;
-        count = (tgtBlinks) * 2;
-        blinkSeq = new Action[]
+        public ActionBlink(int tgtBlinks, float tgtDurationMin, float tgtDurationMax)
+            : base(null, 0)
+        {
+            durationMin = tgtDurationMin;
+            durationMax = tgtDurationMax;
+            count = (tgtBlinks) * 2;
+            blinkSeq = new ActionInstant[]
         {
             new ActionToggleVisibility(),
             new ActionDelay(tgtDurationMin / tgtBlinks, tgtDurationMax / tgtBlinks)
         };
-        action = new ActionSequence(blinkSeq);
-    }
+            action = new ActionSequence(blinkSeq);
+        }
 
-    public override Action clone()
-    {
-        return new ActionBlink(count / 2 - 1, durationMin, durationMax);
-    }
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionBlink(count / 2 - 1, durationMin, durationMax);
+        }
 
-    public override Action reverse()
-    {
-        return new ActionBlink(count / 2 - 1, durationMin, durationMax);
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionBlink(count / 2 - 1, durationMin, durationMax);
+        }
     }
 }

src/ActionsInterval/ActionDelay.cs

@@ -2,31 +2,40 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionDelay : ActionInterval
+namespace coa4u
 {
-    protected float durationMin;
-    protected float durationMax;
-
-    public ActionDelay(float tgtDuration)
-        : base(tgtDuration)
+    /// <summary>
+    /// Delays the action for the given amount of seconds.
+    /// </summary>
+    class ActionDelay : ActionInterval
     {
-        durationMin = tgtDuration;
-        durationMax = tgtDuration;
-    }
+        protected float durationMin;
+        protected float durationMax;
 
-    public ActionDelay(float tgtDuration, float tgtDurationMax)
-        : base(tgtDuration)
-    {
-        durationMin = tgtDuration;
-        durationMax = tgtDurationMax;
-    }
-
-    public override void start()
-    {
-        base.start();
-        if (durationMax != null)
+        public ActionDelay(float tgtDuration)
+            : base(tgtDuration)
         {
-            duration = UnityEngine.Random.Range(durationMin, durationMax);
+            durationMin = tgtDuration;
+            durationMax = tgtDuration;
+        }
+
+        public ActionDelay(float tgtDuration, float tgtDurationMax)
+            : base(tgtDuration)
+        {
+            durationMin = tgtDuration;
+            durationMax = tgtDurationMax;
+        }
+
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            if (durationMax != null)
+            {
+                duration = UnityEngine.Random.Range(durationMin, durationMax);
+            }
         }
     }
 }

src/ActionsInterval/ActionFadeBy.cs

@@ -2,31 +2,46 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionFadeBy : ActionInterval
+namespace coa4u
 {
-    protected float delta;
-
-    public ActionFadeBy(float tgtDelta, float tgtDuration)
-        : base(tgtDuration)
+    /// <summary>
+    /// Fades the target by the given alpha value. The tartet shaders should support transparency in order to use this action.
+    /// </summary>
+    class ActionFadeBy : ActionInterval
     {
-        delta = tgtDelta;
-    }
+        protected float delta;
 
-    public override Action clone()
-    {
-        return new ActionFadeBy(delta, duration);
-    }
+        public ActionFadeBy(float tgtDelta, float tgtDuration)
+            : base(tgtDuration)
+        {
+            delta = tgtDelta;
+        }
 
-    public override Action reverse()
-    {
-        return new ActionFadeBy(-delta, duration);
-    }
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionFadeBy(delta, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Color tgtColor = renderer.material.color;
-        tgtColor[3] += delta * d;
-        renderer.material.color = tgtColor;
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionFadeBy(-delta, duration);
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Color tgtColor = renderer.material.color;
+            tgtColor[3] += delta * d;
+            renderer.material.color = tgtColor;
+        }
     }
 }

src/ActionsInterval/ActionFadeIn.cs

@@ -2,21 +2,33 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionFadeIn : ActionFadeTo
+namespace coa4u
 {
-
-    public ActionFadeIn(float tgtDuration)
-        : base(1, tgtDuration)
+    /// <summary>
+    /// Fades in the target. The tartet shaders should support transparency in order to use this action.
+    /// </summary>
+    class ActionFadeIn : ActionFadeTo
     {
-    }
 
-    public override Action clone()
-    {
-        return new ActionFadeIn(duration);
-    }
+        public ActionFadeIn(float tgtDuration)
+            : base(1, tgtDuration)
+        {
+        }
 
-    public override Action reverse()
-    {
-        return new ActionFadeIn(duration);
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionFadeIn(duration);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionFadeOut(duration);
+        }
     }
 }

src/ActionsInterval/ActionFadeOut.cs

@@ -2,21 +2,33 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionFadeOut : ActionFadeTo
+namespace coa4u
 {
-
-    public ActionFadeOut(float tgtDuration)
-        : base(0, tgtDuration)
+    /// <summary>
+    /// Fades out the target. The tartet shaders should support transparency in order to use this action.
+    /// </summary>
+    class ActionFadeOut : ActionFadeTo
     {
-    }
 
-    public override Action clone()
-    {
-        return new ActionFadeOut(duration);
-    }
+        public ActionFadeOut(float tgtDuration)
+            : base(0, tgtDuration)
+        {
+        }
 
-    public override Action reverse()
-    {
-        return new ActionFadeOut(duration);
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionFadeOut(duration);
+        }
+
+        /// <summary>
+        /// Returns the reversed version of the action, if it is possible.
+        /// </summary>
+        public override ActionInstant reverse()
+        {
+            return new ActionFadeIn(duration);
+        }
     }
 }

src/ActionsInterval/ActionFadeTo.cs

@@ -2,33 +2,48 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionFadeTo : ActionInterval
+namespace coa4u
 {
-    protected float value;
-    protected float delta;
-
-    public ActionFadeTo(float tgtValue, float tgtDuration)
-        : base(tgtDuration)
+    /// <summary>
+    /// Fades the target to the given alpha value. The tartet shaders should support transparency in order to use this action.
+    /// </summary>
+    class ActionFadeTo : ActionInterval
     {
-        value = tgtValue;
-    }
+        protected float value;
+        protected float delta;
 
-    public override Action clone()
-    {
-        return new ActionFadeTo(value, duration);
-    }
+        public ActionFadeTo(float tgtValue, float tgtDuration)
+            : base(tgtDuration)
+        {
+            value = tgtValue;
+        }
 
-    public override void start()
-    {
-        base.start();
-        delta = value - renderer.material.color.a;
-    }
+        /// <summary>
+        /// Returns a copy of the action.
+        /// </summary>
+        public override ActionInstant clone()
+        {
+            return new ActionFadeTo(value, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Color tgtColor = renderer.material.color;
-        tgtColor[3] += delta * d;
-        renderer.material.color = tgtColor;
+        /// <summary>
+        /// This method is called at the action start.
+        /// </summary>
+        public override void start()
+        {
+            base.start();
+            delta = value - renderer.material.color.a;
+        }
+
+        /// <summary>
+        /// This method is called every frame update.
+        /// </summary>
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Color tgtColor = renderer.material.color;
+            tgtColor[3] += delta * d;
+            renderer.material.color = tgtColor;
+        }
     }
 }

src/ActionsInterval/ActionJumpBy.cs

@@ -2,48 +2,51 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionJumpBy : ActionSequence
+namespace coa4u
 {
-    protected Vector3 point;
-    float height;
-    int jumps;
-
-    public ActionJumpBy(Vector3 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
-        : base(new Action[tgtJumps])
+    class ActionJumpBy : ActionSequence
     {
-        point = tgtPoint;
-        jumps = tgtJumps;
-        height = tgtHeight;
-        duration = tgtDuration;
-    }
+        protected Vector3 point;
+        float height;
+        int jumps;
 
-    public ActionJumpBy(Vector2 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
-        : this((Vector3)tgtPoint, tgtHeight, tgtJumps, tgtDuration)
-    {
-        is2d = true;
-    }
-
-    public override Action clone()
-    {
-        return new ActionJumpBy(point, height, jumps, duration);
-    }
-
-    public override Action reverse()
-    {
-        return new ActionJumpBy(-point, height, jumps, duration);
-    }
-
-    public override void start()
-    {
-        float coeff = 1F / jumps;
-        Vector3 end = point * coeff;
-        Vector3 cp1 = Vector3.up * height;
-        Vector3 cp2 = end + cp1;
-        ActionBezierRel singleJump = new ActionBezierRel(cp1, cp2, end, duration * coeff);
-        for (int i = 0; i < jumps; i++)
+        public ActionJumpBy(Vector3 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
+            : base(new ActionInstant[tgtJumps])
         {
-            actions[i] = singleJump;
+            point = tgtPoint;
+            jumps = tgtJumps;
+            height = tgtHeight;
+            duration = tgtDuration;
+        }
+
+        public ActionJumpBy(Vector2 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
+            : this((Vector3)tgtPoint, tgtHeight, tgtJumps, tgtDuration)
+        {
+            is2d = true;
+        }
+
+        public override ActionInstant clone()
+        {
+            return new ActionJumpBy(point, height, jumps, duration);
+        }
+
+        public override ActionInstant reverse()
+        {
+            return new ActionJumpBy(-point, height, jumps, duration);
+        }
+
+        public override void start()
+        {
+            float coeff = 1F / jumps;
+            Vector3 end = point * coeff;
+            Vector3 cp1 = Vector3.up * height;
+            Vector3 cp2 = end + cp1;
+            ActionBezierRel singleJump = new ActionBezierRel(cp1, cp2, end, duration * coeff);
+            for (int i = 0; i < jumps; i++)
+            {
+                actions[i] = singleJump;
+            }
+            base.start();
         }
-        base.start();
     }
 }

src/ActionsInterval/ActionJumpTo.cs

@@ -2,46 +2,49 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionJumpTo : ActionSequence
+namespace coa4u
 {
-    protected Vector3 point;
-    float height;
-    int jumps;
-
-    public ActionJumpTo(Vector3 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
-        : base(new Action[tgtJumps])
+    class ActionJumpTo : ActionSequence
     {
-        point = tgtPoint;
-        jumps = tgtJumps;
-        height = tgtHeight;
-        duration = tgtDuration;
-    }
+        protected Vector3 point;
+        float height;
+        int jumps;
 
-    public ActionJumpTo(Vector2 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
-        : this((Vector3)tgtPoint, tgtHeight, tgtJumps, tgtDuration)
-    {
-        is2d = true;
-    }
-
-    public override Action clone()
-    {
-        return new ActionJumpTo(point, height, jumps, duration);
-    }
-
-    public override void start()
-    {
-        float coeff = 1F / jumps;
-        if (is2d)
-            point.z = transform.position.z;
-        Vector3 start = target.gameObject.transform.position;
-        Vector3 end = (point - start) * coeff;
-        Vector3 cp1 = Vector3.up * height;
-        Vector3 cp2 = end + cp1;
-        ActionBezierRel singleJump = new ActionBezierRel(cp1, cp2, end, duration * coeff);
-        for (int i = 0; i < jumps; i++)
+        public ActionJumpTo(Vector3 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
+            : base(new ActionInstant[tgtJumps])
         {
-            actions[i] = singleJump;
+            point = tgtPoint;
+            jumps = tgtJumps;
+            height = tgtHeight;
+            duration = tgtDuration;
+        }
+
+        public ActionJumpTo(Vector2 tgtPoint, float tgtHeight, int tgtJumps, float tgtDuration)
+            : this((Vector3)tgtPoint, tgtHeight, tgtJumps, tgtDuration)
+        {
+            is2d = true;
+        }
+
+        public override ActionInstant clone()
+        {
+            return new ActionJumpTo(point, height, jumps, duration);
+        }
+
+        public override void start()
+        {
+            float coeff = 1F / jumps;
+            if (is2d)
+                point.z = transform.position.z;
+            Vector3 start = target.gameObject.transform.position;
+            Vector3 end = (point - start) * coeff;
+            Vector3 cp1 = Vector3.up * height;
+            Vector3 cp2 = end + cp1;
+            ActionBezierRel singleJump = new ActionBezierRel(cp1, cp2, end, duration * coeff);
+            for (int i = 0; i < jumps; i++)
+            {
+                actions[i] = singleJump;
+            }
+            base.start();
         }
-        base.start();
     }
 }

src/ActionsInterval/ActionMoveBy.cs

@@ -2,36 +2,39 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionMoveBy : ActionInterval
+namespace coa4u
 {
-    protected Vector3 delta;
-
-    public ActionMoveBy(Vector3 tgtDelta, float tgtDuration)
-        : base(tgtDuration)
+    class ActionMoveBy : ActionInterval
     {
-        delta = tgtDelta;
-    }
+        protected Vector3 delta;
 
-    public ActionMoveBy(Vector2 tgtValue, float tgtDuration)
-        : this((Vector3) tgtValue, tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionMoveBy(Vector3 tgtDelta, float tgtDuration)
+            : base(tgtDuration)
+        {
+            delta = tgtDelta;
+        }
 
-    public override Action clone()
-    {
-        return new ActionMoveBy(delta, duration);
-    }
+        public ActionMoveBy(Vector2 tgtValue, float tgtDuration)
+            : this((Vector3)tgtValue, tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override Action reverse()
-    {
-        return new ActionMoveBy(delta * -1F, duration);
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionMoveBy(delta, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = delta * d;
-        transform.Translate(tgt, Space.World);
+        public override ActionInstant reverse()
+        {
+            return new ActionMoveBy(delta * -1F, duration);
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = delta * d;
+            transform.Translate(tgt, Space.World);
+        }
     }
 }

src/ActionsInterval/ActionMoveTo.cs

@@ -2,40 +2,43 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionMoveTo : ActionInterval
+namespace coa4u
 {
-    protected Vector3 value;
-    protected Vector3 path;
-
-    public ActionMoveTo(Vector3 tgtValue, float tgtDuration)
-        : base(tgtDuration)
+    class ActionMoveTo : ActionInterval
     {
-        value = tgtValue;
-    }
+        protected Vector3 value;
+        protected Vector3 path;
 
-    public ActionMoveTo(Vector2 tgtValue, float tgtDuration)
-        : this((Vector3) tgtValue, tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionMoveTo(Vector3 tgtValue, float tgtDuration)
+            : base(tgtDuration)
+        {
+            value = tgtValue;
+        }
 
-    public override Action clone()
-    {
-        return new ActionMoveBy(value, duration);
-    }
+        public ActionMoveTo(Vector2 tgtValue, float tgtDuration)
+            : this((Vector3)tgtValue, tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override void start()
-    {
-        base.start();
-        if (is2d)
-            value.z = transform.position.z;
-        path = value - transform.position;
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionMoveBy(value, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = path * d;
-        transform.Translate(tgt, Space.World);
+        public override void start()
+        {
+            base.start();
+            if (is2d)
+                value.z = transform.position.z;
+            path = value - transform.position;
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = path * d;
+            transform.Translate(tgt, Space.World);
+        }
     }
 }

src/ActionsInterval/ActionRotateBy.cs

@@ -2,36 +2,39 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionRotateBy : ActionInterval
+namespace coa4u
 {
-    protected Vector3 delta;
-
-    public ActionRotateBy(Vector3 tgtDelta, float tgtDuration)
-        : base(tgtDuration)
+    class ActionRotateBy : ActionInterval
     {
-        delta = tgtDelta;
-    }
+        protected Vector3 delta;
 
-    public ActionRotateBy(float angle, float tgtDuration)
-        : this(new Vector3(0, 0, angle), tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionRotateBy(Vector3 tgtDelta, float tgtDuration)
+            : base(tgtDuration)
+        {
+            delta = tgtDelta;
+        }
 
-    public override Action clone()
-    {
-        return new ActionRotateBy(delta, duration);
-    }
+        public ActionRotateBy(float angle, float tgtDuration)
+            : this(new Vector3(0, 0, angle), tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override Action reverse()
-    {
-        return new ActionRotateBy(delta * -1F, duration);
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionRotateBy(delta, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = delta * d;
-        transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles + tgt);
+        public override ActionInstant reverse()
+        {
+            return new ActionRotateBy(delta * -1F, duration);
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = delta * d;
+            transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles + tgt);
+        }
     }
 }

src/ActionsInterval/ActionRotateTo.cs

@@ -2,46 +2,49 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionRotateTo : ActionInterval
+namespace coa4u
 {
-    protected Vector3 value;
-    protected Vector3 path;
-
-    public ActionRotateTo(Vector3 tgtValue, float tgtDuration)
-        : base(tgtDuration)
+    class ActionRotateTo : ActionInterval
     {
-        value = tgtValue;
-    }
+        protected Vector3 value;
+        protected Vector3 path;
 
-    public ActionRotateTo(float angle, float tgtDuration)
-        : this(new Vector3(0, 0, angle), tgtDuration)
-    {
-        is2d = true;
-    }
-
-    public override Action clone()
-    {
-        return new ActionRotateTo(value, duration);
-    }
-
-    public override void start()
-    {
-        base.start();
-        path = new Vector3();
-        for (int i = 0; i < 3; i++)
+        public ActionRotateTo(Vector3 tgtValue, float tgtDuration)
+            : base(tgtDuration)
         {
-            float t = value[i];
-            float f = transform.rotation.eulerAngles[i];
-            if (Math.Abs(t - f) < Math.Abs(t + 360 - f))
-                path[i] = t - f;
-            else
-                path[i] = t + 360 - f;
+            value = tgtValue;
+        }
+
+        public ActionRotateTo(float angle, float tgtDuration)
+            : this(new Vector3(0, 0, angle), tgtDuration)
+        {
+            is2d = true;
+        }
+
+        public override ActionInstant clone()
+        {
+            return new ActionRotateTo(value, duration);
+        }
+
+        public override void start()
+        {
+            base.start();
+            path = new Vector3();
+            for (int i = 0; i < 3; i++)
+            {
+                float t = value[i];
+                float f = transform.rotation.eulerAngles[i];
+                if (Math.Abs(t - f) < Math.Abs(t + 360 - f))
+                    path[i] = t - f;
+                else
+                    path[i] = t + 360 - f;
+            }
+        }
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = path * d;
+            transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles + tgt);
         }
     }
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = path * d;
-        transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles + tgt);
-    }
 }

src/ActionsInterval/ActionScaleBy.cs

@@ -2,52 +2,55 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionScaleBy : ActionInterval
+namespace coa4u
 {
-    protected Vector3 delta;
-    protected Vector3 path;
-
-    public ActionScaleBy(Vector3 tgtDelta, float tgtDuration)
-        : base(tgtDuration)
+    class ActionScaleBy : ActionInterval
     {
-        delta = tgtDelta;
-    }
+        protected Vector3 delta;
+        protected Vector3 path;
 
-    public ActionScaleBy(Vector2 tgtValue, float tgtDuration)
-        : this((Vector3)tgtValue, tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionScaleBy(Vector3 tgtDelta, float tgtDuration)
+            : base(tgtDuration)
+        {
+            delta = tgtDelta;
+        }
 
-    public override Action clone()
-    {
-        return new ActionScaleBy(delta, duration);
-    }
+        public ActionScaleBy(Vector2 tgtValue, float tgtDuration)
+            : this((Vector3)tgtValue, tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override Action reverse()
-    {
-        return new ActionScaleBy(delta * -1F, duration);
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionScaleBy(delta, duration);
+        }
 
-    public override void start()
-    {
-        base.start();
-        Vector3 scale = transform.localScale;
-        scale.x *= delta.x;
-        scale.y *= delta.y;
-        scale.z *= delta.z;
-        path = scale - transform.localScale;
-    }
+        public override ActionInstant reverse()
+        {
+            return new ActionScaleBy(delta * -1F, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = path * d;
-        transform.localScale += tgt;
-    }
+        public override void start()
+        {
+            base.start();
+            Vector3 scale = transform.localScale;
+            scale.x *= delta.x;
+            scale.y *= delta.y;
+            scale.z *= delta.z;
+            path = scale - transform.localScale;
+        }
 
-    public override void stop()
-    {
-        base.stop();
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = path * d;
+            transform.localScale += tgt;
+        }
+
+        public override void stop()
+        {
+            base.stop();
+        }
     }
 }

src/ActionsInterval/ActionScaleTo.cs

@@ -2,40 +2,43 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionScaleTo : ActionInterval
+namespace coa4u
 {
-    protected Vector3 value;
-    protected Vector3 path;
-
-    public ActionScaleTo(Vector3 tgtValue, float tgtDuration)
-        : base(tgtDuration)
+    class ActionScaleTo : ActionInterval
     {
-        value = tgtValue;
-    }
+        protected Vector3 value;
+        protected Vector3 path;
 
-    public ActionScaleTo(Vector2 tgtValue, float tgtDuration)
-        : this((Vector3) tgtValue, tgtDuration)
-    {
-        is2d = true;
-    }
+        public ActionScaleTo(Vector3 tgtValue, float tgtDuration)
+            : base(tgtDuration)
+        {
+            value = tgtValue;
+        }
 
-    public override Action clone()
-    {
-        return new ActionScaleTo(value, duration);
-    }
+        public ActionScaleTo(Vector2 tgtValue, float tgtDuration)
+            : this((Vector3)tgtValue, tgtDuration)
+        {
+            is2d = true;
+        }
 
-    public override void start()
-    {
-        base.start();
-        if (is2d)
-            value.z = transform.localScale.z;
-        path = value - transform.localScale;
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionScaleTo(value, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = path * d;
-        transform.localScale += tgt;
+        public override void start()
+        {
+            base.start();
+            if (is2d)
+                value.z = transform.localScale.z;
+            path = value - transform.localScale;
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = path * d;
+            transform.localScale += tgt;
+        }
     }
 }

src/ActionsInterval/ActionSkewBy.cs

@@ -2,44 +2,47 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionSkewBy : ActionInterval
+namespace coa4u
 {
-    protected Vector3 skewAngles1;
-    protected Vector3 skewAngles2;
-    protected Mesh mesh;
-
-    public ActionSkewBy(Vector3 tgtAngles1, Vector3 tgtAngles2, float tgtDuration)
-        : base(tgtDuration)
+    class ActionSkewBy : ActionInterval
     {
-        skewAngles1 = tgtAngles1;
-        skewAngles2 = tgtAngles2;
-    }
+        protected Vector3 skewAngles1;
+        protected Vector3 skewAngles2;
+        protected Mesh mesh;
 
-    public override Action clone()
-    {
-        return new ActionSkewBy(skewAngles1, skewAngles2, duration);
-    }
-
-    public override Action reverse()
-    {
-        return new ActionSkewBy(-skewAngles1, -skewAngles2, duration);
-    }
-
-    public override void start()
-    {
-        base.start();
-        if (!(target is MeshActor))
+        public ActionSkewBy(Vector3 tgtAngles1, Vector3 tgtAngles2, float tgtDuration)
+            : base(tgtDuration)
         {
-            throw new Exception("You should use MeshActor class instead of Actor, if you want to skew your object.");
+            skewAngles1 = tgtAngles1;
+            skewAngles2 = tgtAngles2;
+        }
+
+        public override ActionInstant clone()
+        {
+            return new ActionSkewBy(skewAngles1, skewAngles2, duration);
+        }
+
+        public override ActionInstant reverse()
+        {
+            return new ActionSkewBy(-skewAngles1, -skewAngles2, duration);
+        }
+
+        public override void start()
+        {
+            base.start();
+            if (!(target is Actor))
+            {
+                throw new Exception("You should use Actor class instead of Actor, if you want to skew your object.");
+            }
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector3 tgt = skewAngles1 * d;
+            ((Actor)target).skewAngles1 += tgt;
+            tgt = skewAngles2 * d;
+            ((Actor)target).skewAngles2 += tgt;
         }
     }
-
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector3 tgt = skewAngles1 * d;
-        ((MeshActor)target).skewAngles1 += tgt;
-        tgt = skewAngles2 * d;
-        ((MeshActor)target).skewAngles2 += tgt;
-    }
 }

src/ActionsInterval/ActionTintBy.cs

@@ -2,41 +2,44 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionTintBy : ActionInterval
+namespace coa4u
 {
-    protected Vector4 color;
-    protected const float coeff = 1F / 255F;
-
-    public ActionTintBy(Vector4 tgtColor, float tgtDuration)
-        : base(tgtDuration)
+    class ActionTintBy : ActionInterval
     {
-        color = tgtColor * coeff;
-    }
+        protected Vector4 color;
+        protected const float coeff = 1F / 255F;
 
-    public ActionTintBy(Vector3 tgtColor, float tgtDuration)
-        : this(new Vector4(tgtColor.x, tgtColor.y, tgtColor.z), tgtDuration)
-    {
-    }
+        public ActionTintBy(Vector4 tgtColor, float tgtDuration)
+            : base(tgtDuration)
+        {
+            color = tgtColor * coeff;
+        }
 
-    public override Action clone()
-    {
-        return new ActionTintBy(color / coeff, duration);
-    }
+        public ActionTintBy(Vector3 tgtColor, float tgtDuration)
+            : this(new Vector4(tgtColor.x, tgtColor.y, tgtColor.z), tgtDuration)
+        {
+        }
 
-    public override Action reverse()
-    {
-        return new ActionTintBy(-color / coeff, duration);
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionTintBy(color / coeff, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector4 tgt = color * d;
-        Color tgtColor = renderer.material.color;
-        tgtColor[0] += tgt[0];
-        tgtColor[1] += tgt[1];
-        tgtColor[2] += tgt[2];
-        tgtColor[3] += tgt[3];
-        renderer.material.color = tgtColor;
+        public override ActionInstant reverse()
+        {
+            return new ActionTintBy(-color / coeff, duration);
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector4 tgt = color * d;
+            Color tgtColor = renderer.material.color;
+            tgtColor[0] += tgt[0];
+            tgtColor[1] += tgt[1];
+            tgtColor[2] += tgt[2];
+            tgtColor[3] += tgt[3];
+            renderer.material.color = tgtColor;
+        }
     }
 }

src/ActionsInterval/ActionTintTo.cs

@@ -2,48 +2,51 @@
 using System.Collections.Generic;
 using UnityEngine;
 
-class ActionTintTo : ActionInterval
+namespace coa4u
 {
-    protected Vector4 color;
-    protected Vector4 path;
-    protected const float coeff = 1F / 255F;
-
-    public ActionTintTo(Vector4 tgtColor, float tgtDuration)
-        : base(tgtDuration)
+    class ActionTintTo : ActionInterval
     {
-        color = tgtColor * coeff;
-        path = Vector4.zero;
-    }
+        protected Vector4 color;
+        protected Vector4 path;
+        protected const float coeff = 1F / 255F;
 
-    public ActionTintTo(Vector3 tgtColor, float tgtDuration)
-        : this(new Vector4(tgtColor.x, tgtColor.y, tgtColor.z), tgtDuration)
-    {
-    }
+        public ActionTintTo(Vector4 tgtColor, float tgtDuration)
+            : base(tgtDuration)
+        {
+            color = tgtColor * coeff;
+            path = Vector4.zero;
+        }
 
-    public override Action clone()
-    {
-        return new ActionTintTo(color / coeff, duration);
-    }
+        public ActionTintTo(Vector3 tgtColor, float tgtDuration)
+            : this(new Vector4(tgtColor.x, tgtColor.y, tgtColor.z), tgtDuration)
+        {
+        }
 
-    public override void start()
-    {
-        base.start();
-        Color tgtColor = renderer.material.color;
-        path[0] = color[0] - tgtColor[0];
-        path[1] = color[1] - tgtColor[1];
-        path[2] = color[2] - tgtColor[2];
-        path[3] = color[3] - tgtColor[3];
-    }
+        public override ActionInstant clone()
+        {
+            return new ActionTintTo(color / coeff, duration);
+        }
 
-    public override void stepInterval(float dt)
-    {
-        float d = dt / duration;
-        Vector4 tgt = path * d;
-        Color tgtColor = renderer.material.color;
-        tgtColor[0] += tgt[0];
-        tgtColor[1] += tgt[1];
-        tgtColor[2] += tgt[2];
-        tgtColor[3] += tgt[3];
-        renderer.material.color = tgtColor;
+        public override void start()
+        {
+            base.start();
+            Color tgtColor = renderer.material.color;
+            path[0] = color[0] - tgtColor[0];
+            path[1] = color[1] - tgtColor[1];
+            path[2] = color[2] - tgtColor[2];
+            path[3] = color[3] - tgtColor[3];
+        }
+
+        public override void stepInterval(float dt)
+        {
+            float d = dt / duration;
+            Vector4 tgt = path * d;
+            Color tgtColor = renderer.material.color;
+            tgtColor[0] += tgt[0];
+            tgtColor[1] += tgt[1];
+            tgtColor[2] += tgt[2];
+            tgtColor[3] += tgt[3];
+            renderer.material.color = tgtColor;
+        }
     }
 }

src/CoreClasses/MethodHolder.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace coa4u
+{
+    public class MethodHolder
+    {
+        protected Action method;
+        protected string methodName;
+
+        public MethodHolder()
+        {
+        }
+
+        public MethodHolder(Action tgtMethod)
+        {
+            method = tgtMethod;
+            methodName = tgtMethod.Method.Name;
+        }
+
+        public virtual void run(object param = null)
+        {
+            if (method != null)
+                method.Invoke();
+        }
+
+        public string name
+        {
+            get
+            {
+                return methodName;
+            }
+        }
+    }
+
+    public class MethodHolder<T> : MethodHolder
+    {
+        protected Action<T> methodParam;
+
+        public MethodHolder(Action<T> tgtMethod)
+        {
+            methodParam = tgtMethod;
+            methodName = tgtMethod.Method.Name;
+        }
+
+        public override void run(object param)
+        {
+            if (methodParam != null)
+                methodParam.Invoke((T)param);
+        }
+    }
+}

src/UnityComponents/Actor.cs

@@ -1,42 +1,126 @@
-using UnityEngine;
+using System;
+using UnityEngine;
 using System.Collections;
+using System.Collections.Generic;
+using coa4u;
 
+/// <summary>
+/// The default Actor class for the Action system.
+/// </summary>
 public class Actor : MonoBehaviour
 {
-    protected Action action;
+    protected Dictionary<string, MethodHolder> methodsCache = new Dictionary<string, MethodHolder>();
+    protected ActionInstant action;
     private bool paused = false;
+    protected Vector3 angles1prev = Vector3.zero;
+    protected Vector3 angles2prev = Vector3.zero;
+    protected const float coeff = Mathf.PI / 180;
+    protected Vector3[] initialState;
+    public Transform transformCached;
+    public Renderer rendererCached;
+    public Mesh meshCached;
+    public Vector3 skewAngles1;
+    public Vector3 skewAngles2;
 
+    /// <summary>
+    /// This method is called when the script instance is being loaded.
+    /// </summary>
+    protected void Awake()
+    {
+        transformCached = gameObject.transform;
+        rendererCached = gameObject.renderer;
+        meshCached = gameObject.GetComponent<MeshFilter>().mesh;
+        initialState = meshCached.vertices;
+    }
+
+    /// <summary>
+    /// This method is called at every frame update.
+    /// </summary>
     protected void Update()
     {
         if (paused || action == null)
             return;
-        if (action.isRunning())
+        if (action.running)
             action.step(Time.deltaTime);
+        if (skewAngles1 != angles1prev || skewAngles2 != angles2prev)
+            updateSkew();
     }
 
-    public void AttachAction(Action tgtAction)
+    /// <summary>
+    /// Updates the skew for the mesh.
+    /// </summary>
+    void updateSkew()
     {
+        Matrix4x4 m = Matrix4x4.zero;
+        m[0, 0] = 1;
+        m[1, 1] = 1;
+        m[2, 2] = 1;
+        m[3, 3] = 1;
+        m[0, 1] = Mathf.Tan(skewAngles1.x * coeff); // skewing in xy
+        m[0, 2] = Mathf.Tan(skewAngles2.x * coeff); // skewing in xz
+        m[1, 0] = Mathf.Tan(skewAngles1.y * coeff); // skewing in yx
+        m[1, 2] = Mathf.Tan(skewAngles2.y * coeff); // skewing in yz
+        m[2, 0] = Mathf.Tan(skewAngles1.z * coeff); // skewing in zx
+        m[2, 1] = Mathf.Tan(skewAngles2.z * coeff); // skewing in zy
+
+        Vector3[] verts = new Vector3[initialState.Length];
+        int i = 0;
+        while (i < verts.Length)
+        {
+            verts[i] = m.MultiplyPoint3x4(initialState[i]);
+            i++;
+        }
+
+        meshCached.vertices = verts;
+        angles1prev = skewAngles1;
+        angles2prev = skewAngles2;
+    }
+
+    /// <summary>
+    /// Attaches and starts the action.
+    /// </summary>
+    public void AttachAction(ActionInstant tgtAction)
+    {
+        if (action != null)
+        {
+            action.stop();
+        }
         action = tgtAction;
         action.setActor(this);
         action.start();
     }
 
+    /// <summary>
+    /// Stops all running actions for this actor.
+    /// </summary>
     public void StopAction()
     {
-        action.stop();
+        if (action == null)
+            return;
+        if (action.running)
+            action.stop();
         action = null;
     }
 
+    /// <summary>
+    /// Pauses actions for this actor.
+    /// </summary>
     public void PauseAction()
     {
         paused = true;
     }
 
+    /// <summary>
+    /// Unpauses actions for this actor.
+    /// </summary>
     public void UnpauseAction()
     {
         paused = false;
     }
 
+    /// <summary>
+    /// Sets the timescale for current action.
+    /// </summary>
     public void SetTimeScale(float ts)
     {
         if (action is ActionInterval)
@@ -44,4 +128,40 @@ public class Actor : MonoBehaviour
             ((ActionInterval)action).setTimeScale(ts);
         }
     }
+
+    /// <summary>
+    /// Adds method to cache to speed-up 
+    /// </summary>
+    public void AddMethodToCache(MethodHolder method)
+    {
+        methodsCache.Add(method.name, method);
+    }
+
+    public void RemoveMethodFromCache(string key)
+    {
+        if (methodsCache.ContainsKey(key))
+        {
+            methodsCache.Remove(key);
+        }
+        else
+        {
+            throw new Exception("Method " + key + " not found in cache.");
+        }
+    }
+
+
+    public void ReceiveMessage(string key, object param = null, SendMessageOptions options = SendMessageOptions.DontRequireReceiver)
+    {
+        if (methodsCache.ContainsKey(key))
+        {
+            if (param == null)
+                methodsCache[key].run();
+            else
+                methodsCache[key].run(param);
+        }
+        else
+        {
+            gameObject.SendMessage(key, param, options);
+        }
+    }
 }

src/UnityComponents/ActorSampleActions.cs

@@ -1,14 +1,15 @@
 using UnityEngine;
 using System.Collections;
+using coa4u;
 
-public class ActorSampleActions : MeshActor
+public class ActorSampleActions : Actor
 {
     public void Start()
     {
-        Action seq = new ActionRepeat (new ActionSequence(new Action[] 
+        ActionInstant seq = new ActionRepeat (new ActionSequence(new ActionInstant[] 
         {
             new ActionFadeIn(2),
-            new ActionParallel(new Action[] {
+            new ActionParallel(new ActionInstant[] {
                 new ActionMoveBy(new Vector3(10, 10, 0), 1),
                 new ActionRotateBy(new Vector3(90, 90, 0), 1),
                 new ActionTintBy(new Vector4(-50, 50, -150), 1)
@@ -32,9 +33,23 @@ public class ActorSampleActions : MeshActor
             new ActionScaleTo(new Vector3(2, 2, 2), 1),
             new ActionRotateTo(new Vector3(0, 0, 0), 1),
             new ActionFadeOut(2),
-            new ActionSetTint(new Vector4(67, 105, 181))
+            new ActionSetTint(new Vector4(67, 105, 181)),
+            new ActionSendMessage("msgHello"),
+            new ActionSendMessage("msgHelloTo", "world"),
         }), 5);
-        SetTimeScale(2);
         this.AttachAction(seq);
+
+        AddMethodToCache(new MethodHolder(msgHello));
+        AddMethodToCache(new MethodHolder<string>(msgHelloTo));
+    }
+
+    void msgHello()
+    {
+        Debug.Log("Hello!");
+    }
+
+    void msgHelloTo(string who)
+    {
+        Debug.Log("Hello " + who.ToString() + "!");
     }
 }

src/UnityComponents/MeshActor.cs

@@ -1,54 +0,0 @@
-using UnityEngine;
-using System.Collections;
-
-[System.Serializable]
-public class MeshActor : Actor
-{
-    public Vector3 skewAngles1;
-    public Vector3 skewAngles2;
-    protected Vector3 angles1prev = Vector3.zero;
-    protected Vector3 angles2prev = Vector3.zero;
-    protected const float coeff = Mathf.PI/180;
-    protected Mesh mesh;
-    protected Vector3[] initialState;
-
-    void Awake()
-    {
-        mesh = gameObject.GetComponent<MeshFilter>().mesh;
-        initialState = mesh.vertices;
-    }
-
-    protected void Update()
-    {
-        base.Update();
-        if (skewAngles1 != angles1prev || skewAngles2 != angles2prev)
-            updateMesh();
-    }
-
-    protected void updateMesh()
-    {
-        Matrix4x4 m = Matrix4x4.zero;
-        m[0, 0] = 1;
-        m[1, 1] = 1;
-        m[2, 2] = 1;
-        m[3, 3] = 1;
-        m[0, 1] = Mathf.Tan(skewAngles1.x * coeff); // skewing in xy
-        m[0, 2] = Mathf.Tan(skewAngles2.x * coeff); // skewing in xz
-        m[1, 0] = Mathf.Tan(skewAngles1.y * coeff); // skewing in yx
-        m[1, 2] = Mathf.Tan(skewAngles2.y * coeff); // skewing in yz
-        m[2, 0] = Mathf.Tan(skewAngles1.z * coeff); // skewing in zx
-        m[2, 1] = Mathf.Tan(skewAngles2.z * coeff); // skewing in zy
-
-        Vector3[] verts = new Vector3[initialState.Length];
-        int i = 0;
-        while (i < verts.Length)
-        {
-            verts[i] = m.MultiplyPoint3x4(initialState[i]);
-            i++;
-        }
-
-        mesh.vertices = verts;
-        angles1prev = skewAngles1;
-        angles2prev = skewAngles2;
-    }
-}