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bezier cross test

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This commit is contained in:
mkwiser
2014-09-06 02:51:19 +08:00
parent 2152c4bf62
commit 16556d4494
3 changed files with 90 additions and 80 deletions
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42
demo/js/quadraticBezierCross.js
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@@ -22,33 +22,14 @@ define(
var width = canvas.offsetWidth;
var height = canvas.offsetHeight;
var points = [
{
x: 130,
y: 77
},
{
x: 130,
y: 148
},
{
x: 65,
y: 148
},
{
x: 330,
y: 77
},
{
x: 130,
y: 148
},
{
x: 165,
y: 148
}
];
var points = [{"x":132,"y":409},{"x":314,"y":227},{"x":39,"y":356},{"x":181,"y":276},{"x":202,"y":567},{"x":100,"y":122}];
// benchmark
console.time('bezier');
for (var i = 0; i < 1000; i++) {
isBezierCross.apply(null, points);
}
console.timeEnd('bezier');
points.forEach(function(p, index) {
$('[data-index="'+index+'"]').css({
@@ -105,13 +86,14 @@ define(
ctx.lineWidth = 1;
ctx.stroke();
//console.time('bezier');
//console.log(JSON.stringify(points));
var r = isBezierCross.apply(null, points);
//console.timeEnd('bezier');
if(r) {
ctx.beginPath();
r.forEach(function(item) {
ctx.moveTo(item.x, item.y);
ctx.arc(item.x, item.y, 4, 0, Math.PI * 2, true);
});
ctx.fill();
@@ -121,8 +103,6 @@ define(
draw();
//var points = [{"x":79,"y":156},{"x":314,"y":227},{"x":74,"y":287},{"x":159,"y":116},{"x":32,"y":256},{"x":303,"y":290}];
//console.log(isBezierCross.apply(null, points));
}
};