1GL_ATIX_point_sprites 2http://www.ati.com/developer/atiopengl.pdf 3GL_ATIX_point_sprites 4 5 GL_TEXTURE_POINT_MODE_ATIX 0x60B0 6 GL_TEXTURE_POINT_ONE_COORD_ATIX 0x60B1 7 GL_TEXTURE_POINT_SPRITE_ATIX 0x60B2 8 GL_POINT_SPRITE_CULL_MODE_ATIX 0x60B3 9 GL_POINT_SPRITE_CULL_CENTER_ATIX 0x60B4 10 GL_POINT_SPRITE_CULL_CLIP_ATIX 0x60B5 11