1GL_EXT_draw_instanced 2http://developer.download.nvidia.com/opengl/specs/GL_EXT_draw_instanced.txt 3 void glDrawArraysInstancedEXT (GLenum mode, GLint start, GLsizei count, GLsizei primcount) 4 void glDrawElementsInstancedEXT (GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, GLsizei primcount) 5