Shay <sah### [at] simcopartscom> wrote:
: Given four patches with the following control points, must the * points all
: be coplanar?

: 0 0 6 6 6 0 0
: 0 0 5 5 5 0 0
: 1 2 * * * 3 4
: 1 2 * * * 3 4
: 1 2 * * * 3 4
: 0 0 7 7 7 0 0
: 0 0 8 8 8 0 0

  It depends on what you want to achieve. If you want them to form a completely
contiguous smooth surface, then those points should be co-planar (ie. lay
on the same plane) and the points which I marked with numbers should be
co-linear (ie. lay in the same line, ie. points with the same number should
lay in the same line).

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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