META-INF.assets.rjzjh.zrender.contain.cubic.js Maven / Gradle / Ivy
define(function (require) {
var curve = require('../core/curve');
return {
/**
* 三次贝塞尔曲线描边包含判断
* @param {number} x0
* @param {number} y0
* @param {number} x1
* @param {number} y1
* @param {number} x2
* @param {number} y2
* @param {number} x3
* @param {number} y3
* @param {number} lineWidth
* @param {number} x
* @param {number} y
* @return {boolean}
*/
containStroke: function(x0, y0, x1, y1, x2, y2, x3, y3, lineWidth, x, y) {
if (lineWidth === 0) {
return false;
}
var _l = lineWidth;
// Quick reject
if (
(y > y0 + _l && y > y1 + _l && y > y2 + _l && y > y3 + _l)
|| (y < y0 - _l && y < y1 - _l && y < y2 - _l && y < y3 - _l)
|| (x > x0 + _l && x > x1 + _l && x > x2 + _l && x > x3 + _l)
|| (x < x0 - _l && x < x1 - _l && x < x2 - _l && x < x3 - _l)
) {
return false;
}
var d = curve.cubicProjectPoint(
x0, y0, x1, y1, x2, y2, x3, y3,
x, y, null
);
return d <= _l / 2;
}
};
});