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fix bezier cross bugs

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This commit is contained in:
mkwiser
2014-09-04 00:24:42 +08:00
parent d08f45f175
commit b99a79af89
7 changed files with 211 additions and 109 deletions
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76
demo/js/quadraticBezier.js
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@@ -10,8 +10,8 @@ define(
function(require) {
var computeBoundingBox = require('render/util/computeBoundingBox');
var isLineCross = require('render/util/isLineCross');
var isBezierCross = require('render/util/isBezierCross');
var isLineCross = require('render/util/isLineRayCross');
var isBezierRayCross = require('render/util/isBezierRayCross');
var entry = {
@@ -24,18 +24,62 @@ define(
var width = canvas.offsetWidth;
var height = canvas.offsetHeight;
var points = [];
[0, 1, 2, 3].forEach(function(i) {
var p = {
x: Math.floor(Math.random() * (width - 100) + 50),
y: Math.floor(Math.random() * (height - 100) + 50)
// var points = [];
// [0, 1, 2, 3].forEach(function(i) {
// var p = {
// x: Math.floor(Math.random() * (width - 100) + 50),
// y: Math.floor(Math.random() * (height - 100) + 50)
// }
// points[i] = p;
// $($('.point').get(i)).css({
// left: p.x,
// top: p.y
// });
// });
var points = [
{
x: 130,
y: 77
},
{
x: 130,
y: 148
},
{
x: 65,
y: 148
},
{
x: 9,
y: 133
}
points[i] = p;
$($('.point').get(i)).css({
left: p.x,
top: p.y
});
});
];
// var points = [
// {
// x: 65,
// y: 148
// },
// {
// x: 20,
// y: 148
// },
// {
// x: 5,
// y: 115
// },
// {
// x: 9,
// y: 133
// }
// ];
$('[data-index="3"]').css({
left: points[3].x,
top: points[3].y
})
var point;
@@ -97,8 +141,10 @@ define(
ctx.lineTo(max[0], min[1]);
ctx.lineTo(min[0], min[1]);
ctx.stroke();
console.log(isBezierCross(points[0], points[1], points[2], points[3]));
//console.time('bezier');
var r = isBezierRayCross(points[0], points[1], points[2], points[3]);
//console.timeEnd('bezier');
console.log(r);
}
draw();