scratchfoundation/paper.js
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Fix issue introduced in 0ce89fa47c

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This commit is contained in:
Jürg Lehni 2014-02-24 21:30:12 +01:00
parent 3e49e3a5f1
commit f4baf690f8
2 changed files with 61 additions and 55 deletions
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68
src/path/Curve.js
View file

@ -1037,7 +1037,14 @@ new function() { // Scope for methods that require numerical integration
}
};
}, new function() { // Scope for intersection using bezier fat-line clipping
function addCurveIntersections(v1, v2, curve1, curve2, locations,
function addLocation(locations, include, curve1, t1, point1, curve2, t2,
point2) {
var loc = new CurveLocation(curve1, t1, point1, curve2, t2, point2);
if (!include || include(loc))
locations.push(loc);
}
function addCurveIntersections(v1, v2, curve1, curve2, locations, include,
tMin, tMax, uMin, uMax, oldTDiff, reverse, recursion) {
/*#*/ if (__options.fatline) {
// Avoid deeper recursion.
@ -1098,16 +1105,20 @@ new function() { // Scope for methods that require numerical integration
if (tMaxNew - tMinNew > uMax - uMin) {
var parts = Curve.subdivide(v1, 0.5),
t = tMinNew + (tMaxNew - tMinNew) / 2;
addCurveIntersections(v2, parts[0], curve2, curve1, locations,
addCurveIntersections(
v2, parts[0], curve2, curve1, locations, include,
uMin, uMax, tMinNew, t, tDiff, !reverse, ++recursion);
addCurveIntersections(v2, parts[1], curve2, curve1, locations,
addCurveIntersections(
v2, parts[1], curve2, curve1, locations, include,
uMin, uMax, t, tMaxNew, tDiff, !reverse, recursion);
} else {
var parts = Curve.subdivide(v2, 0.5),
t = uMin + (uMax - uMin) / 2;
addCurveIntersections(parts[0], v1, curve2, curve1, locations,
addCurveIntersections(
parts[0], v1, curve2, curve1, locations, include,
uMin, t, tMinNew, tMaxNew, tDiff, !reverse, ++recursion);
addCurveIntersections(parts[1], v1, curve2, curve1, locations,
addCurveIntersections(
parts[1], v1, curve2, curve1, locations, include,
t, uMax, tMinNew, tMaxNew, tDiff, !reverse, recursion);
}
} else if (Math.max(uMax - uMin, tMaxNew - tMinNew) < tolerance) {
@ -1115,16 +1126,16 @@ new function() { // Scope for methods that require numerical integration
var t1 = tMinNew + (tMaxNew - tMinNew) / 2,
t2 = uMin + (uMax - uMin) / 2;
if (reverse) {
locations.push(new CurveLocation(
addLocation(locations, include,
curve2, t2, Curve.evaluate(v2, t2, 0),
curve1, t1, Curve.evaluate(v1, t1, 0)));
curve1, t1, Curve.evaluate(v1, t1, 0));
} else {
locations.push(new CurveLocation(
addLocation(locations, include,
curve1, t1, Curve.evaluate(v1, t1, 0),
curve2, t2, Curve.evaluate(v2, t2, 0)));
curve2, t2, Curve.evaluate(v2, t2, 0));
}
} else { // Iterate
addCurveIntersections(v2, v1, curve2, curve1, locations,
addCurveIntersections(v2, v1, curve2, curve1, locations, include,
uMin, uMax, tMinNew, tMaxNew, tDiff, !reverse, ++recursion);
}
/*#*/ } else { // !__options.fatline
@ -1140,8 +1151,7 @@ new function() { // Scope for methods that require numerical integration
if ((Curve.isLinear(v1) || Curve.isFlatEnough(v1, tolerance))
&& (Curve.isLinear(v2) || Curve.isFlatEnough(v2, tolerance))) {
// See if the parametric equations of the lines interesct.
addLineIntersection(v1, v2, curve1, curve2, locations,
tMin, tMax, uMin, uMax);
addLineIntersection(v1, v2, curve1, curve2, locations, include);
} else {
// Subdivide both curves, and see if they intersect.
// If one of the curves is flat already, no further subdivion
@ -1150,11 +1160,10 @@ new function() { // Scope for methods that require numerical integration
v2s = Curve.subdivide(v2);
for (var i = 0; i < 2; i++)
for (var j = 0; j < 2; j++)
Curve.getIntersections(v1s[i], v2s[j], curve1, curve2,
locations, tMin, tMax, uMin, uMax);
addCurveIntersections(v1s[i], v2s[j], curve1, curve2,
locations, include);
}
}
return locations;
/*#*/ } // !__options.fatline
}
@ -1281,7 +1290,7 @@ new function() { // Scope for methods that require numerical integration
* and the curve.
*/
function addCurveLineIntersections(v1, v2, curve1, curve2, locations,
tMin, tMax, uMin, uMax) {
include) {
var flip = Curve.isLinear(v1),
vc = flip ? v2 : v1,
vl = flip ? v1 : v2,
@ -1321,28 +1330,25 @@ new function() { // Scope for methods that require numerical integration
var tl = Curve.getParameterOf(rvl, x, 0),
t1 = flip ? tl : tc,
t2 = flip ? tc : tl;
if (t1 >= tMin && t1 <= tMax && t2 >= uMin && t2 <= uMax)
locations.push(new CurveLocation(
addLocation(locations, include,
curve1, t1, Curve.evaluate(v1, t1, 0),
curve2, t2, Curve.evaluate(v2, t2, 0)));
curve2, t2, Curve.evaluate(v2, t2, 0));
}
}
}
function addLineIntersection(v1, v2, curve1, curve2, locations,
tMin, tMax, uMin, uMax) {
function addLineIntersection(v1, v2, curve1, curve2, locations, include) {
var point = Line.intersect(
v1[0], v1[1], v1[6], v1[7],
v2[0], v2[1], v2[6], v2[7]);
if (point){
if (point) {
// We need to return the parameters for the intersection,
// since they will be used for sorting
var t1 = Curve.getParameterOf(v1, point.x, point.y),
t2 = Curve.getParameterOf(v2, point.x, point.y);
if (t1 >= tMin && t1 <= tMax && t2 >= uMin && t2 <= uMax)
locations.push(new CurveLocation(
addLocation(locations, include,
curve1, t1, point,
curve2, t2, point));
curve2, t2, point);
}
}
@ -1350,21 +1356,19 @@ new function() { // Scope for methods that require numerical integration
// We need to provide the original left curve reference to the
// #getIntersections() calls as it is required to create the resulting
// CurveLocation objects.
getIntersections: function(v1, v2, curve1, curve2, locations,
tMin, tMax, uMin, uMax) {
getIntersections: function(v1, v2, curve1, curve2, locations, include) {
var linear1 = Curve.isLinear(v1),
linear2 = Curve.isLinear(v2);
(linear1 && linear2
? addLineIntersection
: linear1 || linear2
? addCurveLineIntersections
: addCurveIntersections)(v1, v2, curve1, curve2, locations,
: addCurveIntersections)(
v1, v2, curve1, curve2, locations, include,
// Define the defaults for these parameters of
// addCurveIntersections():
// tMin, tMax, uMin, uMax
tMin || 0, tMax || 1, uMin || 0, uMax || 1,
// oldTDiff, reverse, recursion
0, false, 0);
// tMin, tMax, uMin, uMax, oldTDiff, reverse, recursion
0, 1, 0, 1, 0, false, 0);
return locations;
}
}};

38
src/path/PathItem.js
View file

@ -102,32 +102,34 @@ var PathItem = Item.extend(/** @lends PathItem# */{
h2.multiply(2), true), false)) {
// Self intersectin is found by dividng the curve in two and
// and then applying the normal curve intersection code.
var parts = Curve.subdivide(values1),
before = locations.length;
Curve.getIntersections(parts[0], parts[1], curve1, curve1,
locations, 0, MAX); // tMax
// Check if a location was added by comparing length before.
// Self-intersection can only lead to 0 or 1 intersections.
if (locations.length > before) {
var loc = locations[before];
// Since the curve was split above, we need to adjust
// the parameters for both locations.
var parts = Curve.subdivide(values1);
Curve.getIntersections(
parts[0], parts[1], curve1, curve1, locations,
function(loc) {
if (loc._parameter <= MAX) {
// Since the curve was split above, we need to
// adjust the parameters for both locations.
loc._parameter /= 2;
loc._parameter2 = 0.5 + loc._parameter2 / 2;
return true;
}
}
);
}
}
// Check for intersections with other curves. For self intersection,
// we can start at i + 1 instead of 0
for (var j = path ? 0 : i + 1; j < length2; j++) {
// Avoid end point intersections on consecutive curves whe self
// intersecting.
var excludeEnds = !path
&& (j === i + 1 || j === length2 - 1 && i === 0);
Curve.getIntersections(values1, values2[j], curve1,
curves2[j], locations,
excludeEnds ? MIN : 0, // tMin
excludeEnds ? MAX : 1); // tMax
Curve.getIntersections(
values1, values2[j], curve1, curves2[j], locations,
// Avoid end point intersections on consecutive curves whe
// self intersecting.
!path && (j === i + 1 || j === length2 - 1 && i === 0)
&& function(loc) {
var t = loc._parameter;
return t >= MIN && t <= MAX;
}
);
}
}
// Now filter the locations and process _expand: