[android-developers] Re: Sprite Batcher using OpenGL 2

The article actually talks about a minimum of 24 (according to the specification). But your problem is still there, there is a limit and you cannot go crazy with hundreds of sprites. I think you should find a way to split that task under the hood. Let your SpriteBatcher draw multiple batches of 24-something sprites at a time.


On Friday, February 15, 2013 6:50:27 AM UTC-6, reaktor24 wrote:

Hi. I am reading the book by Mario Zechner and am on Chapter 8 which discusses Sprite Batching. It is relatively straight forward when dealing with OpenGL 1.1 but I am trying to write the code using shaders and OpenGL 2. I am quite confused though as the matrix needs to be updated for the positions and sent to the shader but his code doesn't deal with shaders and I am not getting anything appearing on the screen. Something isn't right. I read on this page that you should send an array of matrices to the shader at each update:

 

http://antonholmquist.com/blog/sprite-batching-opengl-es-2-0/

 

But this means you can only send a maximum of 24 sprite positions with each update. That isn't good enough. Mario's code is sending 100 sprites every frame, not 24. Surely it should be easier under OpenGL 2 and not more complicated. Anyone got any advice?

 

Steve

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