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Old 17th May 2009, 13:06   #11  |  Link
MfA
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Join Date: Mar 2002
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Hmm? The first tangent for the Akima spline constraints on page 4 of that pdf you linked was :

1/2*(z2-z1/y2-y1+z3-z2/y3-y2), so essentially the tangent between P1 and P3 with uniform control points (y2-y1=y3-y2).

Last edited by MfA; 17th May 2009 at 13:11.
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