Archive for the ‘Android’ Category

OpenGL-ES : JSR239 vs Android – Round1

Thursday, November 15th, 2007
    Here is the first round of tests with Android.
    I have made 2 Eclipse projects: one for J2Me using Eclipseme, and another for Android. I work on a pdf to explain howto and differences between JSR239 and Android. It show how to load a png, and use it as a texture on a cube. I have try to get the same structure between the 2 projects. So you have minor differences between them. Mainly inits, it is simple in Android, with no EGL inside. The main difference is NIO, Android has a complete NIO package. So something like ByteOrder needs to be declared not same as JSR239 which is automatic. The process to load PNG is very different but at the end the conversion to a ByteBuffer is the same. It is not optimized at all. Enjoy ;)

  • Android OpenGL-ES Test1
  • J2ME OpenGL-ES Test2

    • Android Test1

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Posted in Android, Mobile3D, OpenGL-ES | 4 Comments »

Do androids dream of electric sheeps?

Tuesday, November 13th, 2007
    First look at Google Mobile Framework:Android
    A very well functionnal SDK is available. But this technology gives me mixed thinking…
    I digg in OpenGL-ES packages, interesting point of view, they stripped down the JSR-239 and remove all parts not compatible with java orientation:

  • javax.microedition.khronos.egl EGL10, EGL11, EGLContext, … This package isn’t present in Android. It was a long debate in JSR-239, as EGL is mainly a native wrapper not very java friendly.
  • java.nio part is much more complete. It is a major lack of J2ME JNI for high speed/large memory allocation, direct in native no java heap use.
  • android.graphics.glutils A small scenegraph: not very usefull and not finished/documented. Object3D could load some sortof serialized objects. Also GLView is a Canvas to display OGL. A strange design is OpenGLContext which is in android.graphics package
  • android.opengl.GLU A subset of GLU utility: mainly some math operations
  • android.opengl.GLDebugHelper An interesting utility to help debug application.
    Soon some code samples

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Posted in Android | No Comments »