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Title: Заглушка | |||
Date: 2017-06-03 00:00 | |||
Category: Stub | |||
Slug: stub | |||
Lang: ru | |||
TODO Импортировать предыдущие статьи Opensource Game Studio с Wordpress. | |||
@@ -1,8 +0,0 @@ | |||
Title: Stub | |||
Date: 2017-06-03 00:00 | |||
Category: Stub | |||
Slug: stub | |||
Lang: en | |||
TODO Import previous Opensource Game Studio articles from Wordpress. | |||
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Title: Приложение OpenSceneGraph | |||
Date: 2017-05-12 00:00 | |||
Category: News | |||
Slug: osg-sample | |||
Lang: ru | |||
![OSG sample][screenshot] | |||
Эта статья описывает создание самоучителей по сборке приложения OpenSceneGraph на Linux, macOS, Windows и Android в апреле 2017. | |||
Предыдущие самоучители описывали установку OpenSceneGraph на Linux, macOS, Windows и отображение модели с помощью стандартного инструмента **osgviewer**. На этот раз результатом нашей работы стало [приложение OpenSceneGraph](https://github.com/OGStudio/openscenegraph-cross-platform-guide-application), которое работает на Linux, macOS, Windows и Android. | |||
Приложение очень простое. Оно умеет следующее: | |||
0. Создание окна для отрисовки | |||
0. Загрузка модели | |||
0. Отрисовка модели с помощью простых шейдеров GLSL | |||
0. Перемещение модели с помощью мыши на Linux, macOS, Windows и пальца на Android | |||
Создать самоучители для Linux, macOS, Windows было настолько простой и понятной задачей, что мы справились с ней за пару недель. Оставшуюся половину месяца мы потратили на создание самоучителя для Android. | |||
Наша [первая успешная сборка под Android](http://www.opengame.epizy.com/lang/ru/news/2414) в прошлом году требовала множество неочивидных телодвижений. В этот раз мы хотели получить более чистый, быстрый и дешёвый подход. | |||
Нам это удалось. В результате всё, что нужно для работы приложения OpenSceneGraph на Android, уместилось в набор из нескольких файлов и небольших изменений для стандартного проекта Android Studio (с поддержкой C++). | |||
Краткий перечень файлов: | |||
0. Поверхность GLES2 | |||
0. Activity для отрисовки на этой поверхности | |||
0. Интерфейс Java для нативной библиотеки | |||
0. Реализация нативной библиотеки на C++ | |||
0. Файл CMake для сборки нативной библиотеки | |||
0. Activity layout | |||
0. Модель для отрисовки | |||
Краткий перечень изменений проекта: | |||
0. Обновление Android manifest для использования GLES2 и Activity | |||
0. Использование файла CMake нативной библиотеки в проектном файле CMake | |||
Документация OpenSceneGraph предполагает сборку OpenSceneGraph вне Android Studio с помощью CMake. Такой подход имеет следующие ограничения: | |||
0. Ручная сборка OpenSceneGraph под каждую платформу | |||
0. Ручное копирование собранных библиотек OpenSceneGraph в проект Android Studio | |||
Наш подход включает в себя сборку OpenSceneGraph для тех платформ, для которых собирается проект Android Studio. К тому же, OpenSceneGraph используется как часть проекта, поэтому нет никакой дополнительной рутины: достаточно просто пересобрать проект, и всё готово. | |||
На этом мы заканчиваем описание создания самоучителей по сборке приложения OpenSceneGraph на Linux, macOS, Windows и Android в апреле 2017. | |||
[screenshot]: {attach}/images/2017-05_osg-sample.png |
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Title: OpenSceneGraph sample | |||
Date: 2017-05-12 00:00 | |||
Category: News | |||
Slug: osg-sample | |||
Lang: en | |||
![OSG sample][screenshot] | |||
This article describes creation of the tutorials for building sample OpenSceneGraph application under Linux, macOS, Windows, and Android in April 2017. | |||
Previous tutorials described how to install OpenSceneGraph under Linux, macOS, Windows and render a model using the standard **osgviewer** tool. This time we worked on a [sample OpenSceneGraph application](https://github.com/OGStudio/openscenegraph-cross-platform-guide-application) that would run under Linux, macOS, Windows, and Android. | |||
The application is very basic and has the following features: | |||
0. Render window creation | |||
0. Model loading | |||
0. Model rendering with simple GLSL shaders | |||
0. Model motion with a mouse under Linux, macOS, Windows and a finger under Android | |||
Creating the tutorials for Linux, macOS, Windows was so easy and straightforward, that it only took us half a month. We spent the second half of the month creating Android tutorial. | |||
Our [first successful Android build](http://www.opengame.epizy.com/lang/en/news/2414) last year included hacks and non-obvious steps to make OpenSceneGraph run under Android. This time we wanted a cleaner, faster, and cheaper approach. | |||
The approach we ended up with requires just a few files and a few changes to the original Android Studio project (with C++ support) to make sample OpenSceneGraph application run under Android. | |||
Here's a quick rundown of the files: | |||
0. GLES2 surface | |||
0. Render activity to render to the surface | |||
0. Native library Java interface | |||
0. Native library C++ implementation | |||
0. CMake file to build native library | |||
0. Render activity layout | |||
0. Model to display | |||
Here's a quick rundown of the project changes: | |||
0. Update Android manifest to use GLES2 and render activity | |||
0. Reference native library's CMake file in the project's CMake file | |||
OpenSceneGraph documentation suggests building OpenSceneGraph outside Android Studio with CMake. However, this approach has the following limitations: | |||
0. You have to build OpenSceneGraph for each target architecture | |||
0. You have to manually copy/reference built OpenSceneGraph libraries into Android Studio project | |||
Our approach includes building OpenSceneGraph for those target architectures that Android Studio project is built for. Also, OpenSceneGraph is already referenced, so no extra work is required: you just need to rebuild the project, and you're done. | |||
That's it for describing the creation of the tutorials for building sample OpenSceneGraph application under Linux, macOS, Windows, and Android in April 2017. | |||
[screenshot]: {attach}/images/2017-05_osg-sample.png |
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