GL_APPLE_clip_distance
http://www.opengl.org/registry/specs/APPLE/clip_distance.txt
GL_APPLE_clip_distance

	GL_MAX_CLIP_DISTANCES_APPLE 0x0D32
	GL_CLIP_DISTANCE0_APPLE 0x3000
	GL_CLIP_DISTANCE1_APPLE 0x3001
	GL_CLIP_DISTANCE2_APPLE 0x3002
	GL_CLIP_DISTANCE3_APPLE 0x3003
	GL_CLIP_DISTANCE4_APPLE 0x3004
	GL_CLIP_DISTANCE5_APPLE 0x3005
	GL_CLIP_DISTANCE6_APPLE 0x3006
	GL_CLIP_DISTANCE7_APPLE 0x3007
