Simple 2D batch renderer example using PyOpenGL and pygame. See 'pygame-main.py' for details.
The Batch class creates two VBOs: one for quad vertices and texture coordinates, and one for indices.
maxQuads specifies the maximum number of quads that the VBO can contain. batch.flush() is called automatically when the buffer has been filled or explicitly by batch.end().
Note: The batch does not support color. A color attribute could easily be added.
Setup:
batch.setup_shaders(vpMatrix = numpy.dot(viewMatrix, projectionMatrix))
renderer = batch.Batch(maxQuads = 10000)Render loop:
...
GL.glClearColor(0, 0, 0, 1)
GL.glClear(GL.GL_COLOR_BUFFER_BIT)
renderer.begin()
renderer.draw(textureRegion, x, y)
renderer.end()
...Cleanup: gltexture.delete() and batch.delete() will delete a texture and batch VBOs, respectively.
batch.py depends on PyOpenGL and NumPy. pygame-main.py depends on Pygame, but Pygame is not a requirement for using the batch itself.
The code is released under public domain. "animation.png" is copyrighted.