scratchfoundation/paper.js
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Rename some variables to be more clear about their role.

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This commit is contained in:
Jürg Lehni 2016-01-07 15:55:24 +01:00
parent 5e01774c91
commit bc8fb92b9d
1 changed files with 19 additions and 17 deletions
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36
src/path/PathItem.Boolean.js
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@ -358,22 +358,24 @@ PathItem.inject(new function() {
end = start + curve.length;
// Walk through one single loop of curves.
var startCounted = false,
prevCurve, // non-horizontal curve before the current curve.
nextCurve, // non-horizontal curve after the current curve.
prevWinding, // The previous non-horizontal curve.
nextWinding, // The next non-horizontal curve (with winding)
prevT = null,
curve = null;
for (var i = start; i < end; i++) {
if (!curve) {
prevCurve = lastWinding;
nextCurve = firstWinding;
prevWinding = lastWinding;
nextWinding = firstWinding;
} else if (curve.winding) {
prevCurve = curve;
prevWinding = curve;
}
curve = curves[i];
if (curve === nextCurve) {
nextCurve = curve.next;
while (nextCurve && !nextCurve.winding) {
nextCurve = nextCurve.next;
if (curve === nextWinding) {
// Each time we've reached the next curve with winding,
// search for the next one after.
nextWinding = curve.next;
while (nextWinding && !nextWinding.winding) {
nextWinding = nextWinding.next;
}
}
var values = curve.values,
@ -405,10 +407,10 @@ PathItem.inject(new function() {
// Take care of cases where the ray merely touches
// the connecting point between two neighboring mono
// curves, but does not cross either of them.
if (t < tMin && prevCurve
&& winding * prevCurve.winding < 0
|| t > tMax && nextCurve
&& winding * nextCurve.winding < 0) {
if (t < tMin && prevWinding
&& winding * prevWinding.winding < 0
|| t > tMax && nextWinding
&& winding * nextWinding.winding < 0) {
if (x > xBefore && x < xAfter) {
++windLeft;
++windRight;
@ -431,11 +433,11 @@ PathItem.inject(new function() {
// If the point is on a horizontal curve and winding
// changes between before and after the curve, we treat
// this as a 'touch point'.
if (py === values[1]
&& (values[0] < xAfter && values[6] > xBefore
if (prevWinding && nextWinding
&& py === values[1]
&& (values[0] < xAfter && values[6] > xBefore
|| values[6] < xAfter && values[0] > xBefore)
&& prevCurve && nextCurve
&& prevCurve.winding * nextCurve.winding < 0) {
&& prevWinding.winding * nextWinding.winding < 0) {
++windLeft;
++windRight;
}