GL_ARB_point_parameters
http://oss.sgi.com/projects/ogl-sample/registry/ARB/point_parameters.txt
	GL_POINT_SIZE_MIN_ARB 0x8126
	GL_POINT_SIZE_MAX_ARB 0x8127
	GL_POINT_FADE_THRESHOLD_SIZE_ARB 0x8128
	GL_POINT_DISTANCE_ATTENUATION_ARB 0x8129
	void glPointParameterfARB (GLenum pname, GLfloat param)
	void glPointParameterfvARB (GLenum pname, GLfloat* params)