GL_ARB_instanced_arrays
http://www.opengl.org/registry/specs/ARB/instanced_arrays.txt
GL_ARB_instanced_arrays
GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0x88FE
void glVertexAttribDivisorARB (GLuint index, GLuint divisor)
void glDrawArraysInstancedARB (GLenum mode, GLint first, GLsizei count, GLsizei primcount)
void glDrawElementsInstancedARB (GLenum mode, GLsizei count, GLenum type, const void* indices, GLsizei primcount)