Mike Williams wrote in message ...
>In this example scene, when using the whole length of a cubic_spline
>(it's tricky to stop at the penultimate control point when using spline
>functions to generate isosurfaces), the isosurface that uses the spline
>explodes, and the spline evaluates to <-1.#IND00,-1.#IND00,-1.#IND00> at
>the endpoint. Replace "cubic_spline" by any other spline type and the
>isosurface behaves normally, and the spline evaluates to <0,0,-0.6>.

It shouldn't be doing that.  It should be evaluating to <0, 0.4, 0.4> at any
point beyond the next-to-last.  I'll see if I can find the bug.

--
Mark

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