forked from zhurui/management
33 lines
952 B
JavaScript
33 lines
952 B
JavaScript
var curve = require("../core/curve");
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/**
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* 三次贝塞尔曲线描边包含判断
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* @param {number} x0
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* @param {number} y0
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* @param {number} x1
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* @param {number} y1
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* @param {number} x2
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* @param {number} y2
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* @param {number} x3
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* @param {number} y3
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* @param {number} lineWidth
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* @param {number} x
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* @param {number} y
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* @return {boolean}
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*/
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function containStroke(x0, y0, x1, y1, x2, y2, x3, y3, lineWidth, x, y) {
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if (lineWidth === 0) {
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return false;
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}
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var _l = lineWidth; // Quick reject
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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) {
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return false;
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}
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var d = curve.cubicProjectPoint(x0, y0, x1, y1, x2, y2, x3, y3, x, y, null);
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return d <= _l / 2;
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}
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exports.containStroke = containStroke; |