scratchfoundation/paper.js
1
0
Fork 0
mirror of https://github.com/scratchfoundation/paper.js.git synced 2025-01-05 20:32:00 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Use new range feature of solveCubic()

Browse source
This commit is contained in:
Jürg Lehni 2013-10-29 15:44:42 +01:00
parent 979428b6dc
commit f20e8240cd
1 changed files with 13 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
src/path/Curve.js
View file

@ -1450,24 +1450,22 @@ new function() { // Scope for methods that require numerical integration
y * cos + x * sin);
}
var roots = [],
count = Curve.solveCubic(vcr, 1, 0, roots);
count = Curve.solveCubic(vcr, 1, 0, roots, 0, 1);
// NOTE: count could be -1 for inifnite solutions, but that should only
// happen with lines, in which case we should not be here.
for (var i = 0; i < count; i++) {
var t = roots[i];
if (t >= 0 && t <= 1) {
var point = Curve.evaluate(vcr, t, 0);
// We do have a point on the infinite line. Check if it falls on
// the line *segment*.
if (point.x >= 0 && point.x <= rl2x){
var tl = Curve.getParameterOf(vl, point.x, point.y);
// Interpolate the parameter for the intersection on line.
var t1 = flip ? tl : t,
t2 = flip ? t : tl;
addLocation(locations,
curve1, t1, Curve.evaluate(v1, t1, 0),
curve2, t2, Curve.evaluate(v2, t2, 0));
}
var tc = roots[i],
point = Curve.evaluate(vcr, tc, 0);
// We do have a point on the infinite line. Check if it falls on
// the line *segment*.
if (point.x >= 0 && point.x <= rl2x){
var tl = Curve.getParameterOf(vl, point.x, point.y);
// Interpolate the parameter for the intersection on line.
var t1 = flip ? tl : tc,
t2 = flip ? tc : tl;
addLocation(locations,
curve1, t1, Curve.evaluate(v1, t1, 0),
curve2, t2, Curve.evaluate(v2, t2, 0));
}
}
}