33 lines
886 B
JavaScript
33 lines
886 B
JavaScript
|
var _curve = require("../core/curve");
|
||
|
|
|
||
|
|
var quadraticProjectPoint = _curve.quadraticProjectPoint;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 二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} lineWidth
|
||
|
|
* @param {number} x
|
||
|
|
* @param {number} y
|
||
|
|
* @return {boolean}
|
||
|
|
*/
|
||
|
|
function containStroke(x0, y0, x1, y1, x2, y2, lineWidth, x, y) {
|
||
|
|
if (lineWidth === 0) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
var _l = lineWidth; // Quick reject
|
||
|
|
|
||
|
|
if (y > y0 + _l && y > y1 + _l && y > y2 + _l || y < y0 - _l && y < y1 - _l && y < y2 - _l || x > x0 + _l && x > x1 + _l && x > x2 + _l || x < x0 - _l && x < x1 - _l && x < x2 - _l) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
var d = quadraticProjectPoint(x0, y0, x1, y1, x2, y2, x, y, null);
|
||
|
|
return d <= _l / 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
exports.containStroke = containStroke;
|