2
http://oss.sgi.com/projects/ogl-sample/registry/NV/point_sprite.txt
3
GL_POINT_SPRITE_NV 0x8861
4
GL_COORD_REPLACE_NV 0x8862
5
GL_POINT_SPRITE_R_MODE_NV 0x8863
6
void glPointParameteriNV (GLenum pname, GLint param)
7
void glPointParameterivNV (GLenum pname, const GLint* params)