156 lines
6.3 KiB
HTML
156 lines
6.3 KiB
HTML
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<title>November 2016 recap</title>
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<h1><a href="http://opengamestudio.org">Opensource Game Studio</a></h1>
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<h3 class="article-title"><a href="http://opengamestudio.org/2016-november-recap.html" rel="bookmark"
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title="Permalink to November 2016 recap">November 2016 recap</a></h3>
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</header>
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<h6 class="subheader" title="2016-12-15T00:00:00+03:00">Чт 15 Декабрь 2016
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<a class="button secondary small translation-button" href="http://opengamestudio.org/2016-november-recap-ru.html">ru</a>
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</h6> <p><img alt="November recap" src="http://opengamestudio.org/2016-12-15_2016-november-recap.png" /></p>
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<p>This article describes the start of MJIN library separation into modules.</p>
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<p>Once we built OpenSceneGraph for Android, it became obvious that some MJIN functionality is not suitable for Android. For example, UIQt provides a basis for OGS Editor UI. Since OGS Editor is a desktop application, we don't need UIQt for Android.</p>
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<p>We decided to have a look at two approaches to separate MJIN into modules: build-time separation and run-time one.
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<strong>Build-time</strong> separation means MJIN becomes highly configurable and each platform gets specifically tailored MJIN build.
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<strong>Run-time</strong> separation means MJIN is divided into smaller libraries that are connected at run-time, which makes it easy to change functionality without rebuilding.</p>
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<p><strong>Run-time separation research.</strong></p>
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<p>Since run-time separation has more benefits, we started researching it first.
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The easiest way to achieve it was to use C API, because C ABI rules are much simpler than C++ one's.</p>
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<p>We created a sample project consisting of the application, library, and plugin.
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<strong>The application</strong> has been linked to the library and used it to load the plugin.
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<strong>The library</strong> provided functions to register plugins and call their functions.
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<strong>The plugin</strong> provided functions for the library and called library functions.</p>
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<p>The research was successful: the sample project worked correctly under Linux and Windows. However, since MJIN is currently a single large entity, we postponed C API application until we finish build-time separation.</p>
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<p><strong>Build-time separation start.</strong></p>
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<p>We extracted the following modules from MJIN:</p>
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<ul>
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<li>
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<p>Android: provides Java Native Interface (JNI) to MJIN</p>
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</li>
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<li>
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<p>Sound: provides access to OpenAL</p>
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</li>
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<li>
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<p>UIQt: provides access to Qt UI</p>
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</li>
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</ul>
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<p>Sound and UIQt modules are currently statically linked into MJIN library, while Android module is already a separate library due to JNI requirements.</p>
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<p>In the coming year, we're going to significantly restructure MJIN so that it suits as many platforms as possible.</p>
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<p>That's it for describing the start of MJIN library separation into modules.</p>
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<p class="subheader">Category: <a href="http://opengamestudio.org/category/news.html">News</a>
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