scratchfoundation/paper.js
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Only calculate non-parametric bezier curve if values are actually used.

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This commit is contained in:
Jürg Lehni 2015-09-26 11:46:54 -05:00
parent ea3cc63e2e
commit 317b809fee
1 changed files with 9 additions and 9 deletions
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18
src/path/Curve.js
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@ -1434,13 +1434,6 @@ new function() { // Scope for intersection using bezier fat-line clipping
factor = d1 * d2 > 0 ? 3 / 4 : 4 / 9,
dMin = factor * Math.min(0, d1, d2),
dMax = factor * Math.max(0, d1, d2),
// Calculate non-parametric bezier curve D(ti, di(t)) - di(t) is the
// distance of P from the baseline l of the fat-line, ti is equally
// spaced in [0, 1]
dp0 = getSignedDistance(q0x, q0y, q3x, q3y, v1[0], v1[1]),
dp1 = getSignedDistance(q0x, q0y, q3x, q3y, v1[2], v1[3]),
dp2 = getSignedDistance(q0x, q0y, q3x, q3y, v1[4], v1[5]),
dp3 = getSignedDistance(q0x, q0y, q3x, q3y, v1[6], v1[7]),
tMinNew, tMaxNew,
tDiff;
if (q0x === q3x && uMax - uMin < epsilon && recursion >= 3) {
@ -1450,8 +1443,15 @@ new function() { // Scope for intersection using bezier fat-line clipping
tMaxNew = tMinNew = (tMax + tMin) / 2;
tDiff = 0;
} else {
// Get the top and bottom parts of the convex-hull
var hull = getConvexHull(dp0, dp1, dp2, dp3),
// Calculate non-parametric bezier curve D(ti, di(t)) - di(t) is the
// distance of P from the baseline l of the fat-line, ti is equally
// spaced in [0, 1]
var dp0 = getSignedDistance(q0x, q0y, q3x, q3y, v1[0], v1[1]),
dp1 = getSignedDistance(q0x, q0y, q3x, q3y, v1[2], v1[3]),
dp2 = getSignedDistance(q0x, q0y, q3x, q3y, v1[4], v1[5]),
dp3 = getSignedDistance(q0x, q0y, q3x, q3y, v1[6], v1[7]),
// Get the top and bottom parts of the convex-hull
hull = getConvexHull(dp0, dp1, dp2, dp3),
top = hull[0],
bottom = hull[1],
tMinClip, tMaxClip;