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Fix self-intersection resolution on a single bezier curve

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hkrish 2014-02-28 16:51:28 +01:00
parent 4c048dbc94
commit cb810c73bd
1 changed files with 11 additions and 4 deletions
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15
src/path/PathItem.Boolean.js
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@ -395,9 +395,15 @@ PathItem.inject(new function() {
// countour to traverse next.
w3 = t1.cross(t3),
w4 = t1.cross(t4);
// Do not attempt to switch contours if we aren't absolutely
// sure that there is a possible candidate.
if (w3 * w4 !== 0) {
if (selfOp) {
// Switch to the intersection segment, if we are
// resolving self-Intersections.
seg._visited = interSeg._visited;
seg = interSeg;
dir = 1;
} else if (w3 * w4 !== 0) {
// Do not attempt to switch contours if we aren't absolutely
// sure that there is a possible candidate.
var curve = w3 < w4 ? c3 : c4,
nextCurve = operator(curve._segment1._winding)
? curve
@ -443,7 +449,8 @@ PathItem.inject(new function() {
// Add the path to the result.
// Try to avoid stray segments and incomplete paths.
var count = path._segments.length;
if (count > 2 || count === 2 && path._closed && !path.isPolygon())
if ((path._closed && count) || count > 2
|| (count === 2 && path._closed && !path.isPolygon()))
paths.push(path);
}
return paths;