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fix mistake in tangent computation

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This commit is contained in:
David Rose 2011-07-03 18:09:49 +00:00
parent 5892019088
commit e5272c9e3d
1 changed files with 1 additions and 1 deletions
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2
panda/src/parametrics/nurbsCurveResult.cxx
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@ -100,7 +100,7 @@ eval_segment_point(int segment, float t, LVecBase3f &point) const {
void NurbsCurveResult::
eval_segment_tangent(int segment, float t, LVecBase3f &tangent) const {
float t2 = t*t;
LVecBase4f tvec(t2, t, 1.0f, 0.0f);
LVecBase4f tvec(3.0 * t2, 2.0 * t, 1.0f, 0.0f);
tangent.set(tvec.dot(_composed[segment].get_col(0)),
tvec.dot(_composed[segment].get_col(1)),