Talk:Catmull–Clark subdivision surface: Difference between revisions

The sample data has factors of 2/3 but for example, consider the edge connecting points (1,-1,-1) and (1,-1,1). Here, the coordinates mid-point of the edge is (1,-1,0). And the face points of the two adjacent faces are (1,0,0) and (0,_1-1,0), and the mid-point of the line connecting those two face points would then be (0.5,-0.5,0). And the average of (1,-1,0) and (0.5,-0.5,0) is (0.75,_0-0.75,0). But this edge_point does not currently appear in the sample data.