OpenGL: Single vertex attribute for multiple vertices?

Question

I have a vertex shader that accepts the following attributes:

• a_posCoord: vertex position
• a_texCoord: texture coordinate (passed

Answer 1

I achieve this effect with instanced rendering. glVertexAttribDivisor(1); makes openGL read vertex attribute once per instance. If your bullboards have different geometry you may consider passing you model matrix as an attribute the same way as alpha.