scratchfoundation/paper.js
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Clean up code a bit more.

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This commit is contained in:
Jürg Lehni 2013-05-26 17:52:05 -07:00
parent 32709a176b
commit 14962b5c45
1 changed files with 9 additions and 8 deletions

17
src/path/Curve.js
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@ -1300,24 +1300,25 @@ new function() { // Scope for methods that require numerical integration
*/
function getConvexHull(dq0, dq1, dq2, dq3) {
var getSignedDistance = Line.getSignedDistance,
distq1 = getSignedDistance(0, dq0, 1, dq3, 1 / 3, dq1),
distq2 = getSignedDistance(0, dq0, 1, dq3, 2 / 3, dq2),
p0 = [ 0, dq0 ],
p1 = [ 1 / 3, dq1 ],
p2 = [ 2 / 3, dq2 ],
p3 = [ 1, dq3 ];
p3 = [ 1, dq3 ],
// Find signed distance of p1 and p2 from line [ p0, p3 ]
dist1 = getSignedDistance(0, dq0, 1, dq3, 1 / 3, dq1),
dist2 = getSignedDistance(0, dq0, 1, dq3, 2 / 3, dq2);
// Check if p1 and p2 are on the same side of the line [ p0, p3 ]
if (distq1 * distq2 < 0) {
// dq1 and dq2 lie on different sides of [ p0, p3 ]. The hull is
// a quadrilateral and line [ p0, p3 ] is NOT part of the hull so we
if (dist1 * dist2 < 0) {
// p1 and p2 lie on different sides of [ p0, p3 ]. The hull is a
// quadrilateral and line [ p0, p3 ] is NOT part of the hull so we
// are pretty much done here.
return [ p0, p1, p3, p2 ];
}
// dq1 and dq2 lie on the same sides of [ p0, p3 ]. The hull can be
// p1 and p2 lie on the same sides of [ p0, p3 ]. The hull can be
// a triangle or a quadrilateral and line [ p0, p3 ] is part of the
// hull. Check if the hull is a triangle or a quadrilateral.
var pmax, cross;
if (Math.abs(distq1) > Math.abs(distq2)) {
if (Math.abs(dist1) > Math.abs(dist2)) {
pmax = p1;
// apex is dq3 and the other apex point is dq0 vector
// dqapex->dqapex2 or base vector which is already part of the hull.