1GL_EXT_point_parameters
2http://www.opengl.org/registry/specs/EXT/point_parameters.txt
3GL_EXT_point_parameters
4	GL_POINT_SIZE_MIN_EXT 0x8126
5	GL_POINT_SIZE_MAX_EXT 0x8127
6	GL_POINT_FADE_THRESHOLD_SIZE_EXT 0x8128
7	GL_DISTANCE_ATTENUATION_EXT 0x8129
8	void glPointParameterfEXT (GLenum pname, GLfloat param)
9	void glPointParameterfvEXT (GLenum pname, const GLfloat* params)
10