1GL_EXT_point_parameters
2https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_point_parameters.txt
3GL_EXT_point_parameters
4
5	GL_POINT_SIZE_MIN_EXT 0x8126
6	GL_POINT_SIZE_MAX_EXT 0x8127
7	GL_POINT_FADE_THRESHOLD_SIZE_EXT 0x8128
8	GL_DISTANCE_ATTENUATION_EXT 0x8129
9	void glPointParameterfEXT (GLenum pname, GLfloat param)
10	void glPointParameterfvEXT (GLenum pname, const GLfloat* params)
11