scratchfoundation/paper.js
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Switch to using 0, 1 instead of tMin, tMax for tangents.

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getTangentAt() can handle that since a while now.
This commit is contained in:
Jürg Lehni 2015-08-23 09:43:28 +02:00
parent 157a60dee6
commit edfabcbbd8
1 changed files with 4 additions and 8 deletions

12
src/path/PathItem.Boolean.js
View file

@ -373,11 +373,7 @@ PathItem.inject(new function() {
* @return {Path[]} the contours traced
*/
function tracePaths(segments, operator, selfOp) {
var paths = [],
// Values for getTangentAt() that are almost 0 and 1.
// TODO: Correctly support getTangentAt(0) / (1)?
tMin = /*#=*/Numerical.TOLERANCE,
tMax = 1 - tMin;
var paths = [];
for (var i = 0, seg, startSeg, l = segments.length; i < l; i++) {
seg = startSeg = segments[i];
if (seg._visited || !operator(seg._winding))
@ -408,14 +404,14 @@ PathItem.inject(new function() {
var c1 = seg.getCurve();
if (dir > 0)
c1 = c1.getPrevious();
var t1 = c1.getTangentAt(dir < 1 ? tMin : tMax, true),
var t1 = c1.getTangentAt(dir < 1 ? 0 : 1, true),
// Get both curves at the intersection (except the
// entry curves).
c4 = interSeg.getCurve(),
c3 = c4.getPrevious(),
// Calculate their winding values and tangents.
t3 = c3.getTangentAt(tMax, true),
t4 = c4.getTangentAt(tMin, true),
t3 = c3.getTangentAt(1, true),
t4 = c4.getTangentAt(0, true),
// Cross product of the entry and exit tangent
// vectors at the intersection, will let us select
// the correct contour to traverse next.