No comment. Sorry.

	clipping polygons
	clipPolygon:count:with:mask:

	private
	primNextClippedTriangleAfter:vertices:count:indexes:count:

	clip flags	top
	determineClipFlags:count: Determine the clip flags for all the vertices in the vertex array

	clipping polygons	top
	clipPolygon:count:with:mask: Clip the polygon defined by vtxCount vertices in vtxArray. tempVtxArray is a temporary storage area used for copying the vertices back and forth during clipping operation. outMask is the full clip mask of the vertex buffer, allowing some optimizations of the clipping code. NOTE: It is significant here that the contents of vtxArray and tempVtxArray are equal.

	private	top
	primNextClippedTriangleAfter:vertices:count:indexes:count: Find the next partially clipped triangle from the vertex buffer and return its index. If there are no more partially clipped triangles return zero.