scratchfoundation/paper.js
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Port back code to prevent tangents and normals of length 0 from Scriptographer.

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This commit is contained in:
Jürg Lehni 2011-07-09 11:20:03 +02:00
parent ebd3bfc092
commit 45c7f9c4fc
1 changed files with 7 additions and 0 deletions
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7
src/path/Curve.js
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@ -413,6 +413,13 @@ var Curve = this.Curve = Base.extend(/** @lends Curve# */{
x = t == 0 ? p1x : p2x;
y = t == 0 ? p1y : p2y;
} else {
// TODO: Find a better solution for this:
// Prevent tangents and normals of length 0:
var tMin = Numerical.TOLERANCE;
if (t < tMin && c1x == p1x && c1y == p1y)
t = tMin;
else if (t > 1 - tMin && c2x == p2x && c2y == p2y)
t = 1 - tMin;
// Calculate the polynomial coefficients.
var cx = 3 * (c1x - p1x),
bx = 3 * (c2x - c1x) - cx,