META-INF.assets.rjzjh.zrender.contain.arc.js Maven / Gradle / Ivy
define(function (require) {
var normalizeRadian = require('./util').normalizeRadian;
var PI2 = Math.PI * 2;
return {
/**
* 圆弧描边包含判断
* @param {number} cx
* @param {number} cy
* @param {number} r
* @param {number} startAngle
* @param {number} endAngle
* @param {boolean} anticlockwise
* @param {number} lineWidth
* @param {number} x
* @param {number} y
* @return {Boolean}
*/
containStroke: function (
cx, cy, r, startAngle, endAngle, anticlockwise,
lineWidth, x, y
) {
if (lineWidth === 0) {
return false;
}
var _l = lineWidth;
x -= cx;
y -= cy;
var d = Math.sqrt(x * x + y * y);
if ((d - _l > r) || (d + _l < r)) {
return false;
}
if (Math.abs(startAngle - endAngle) % PI2 < 1e-4) {
// Is a circle
return true;
}
if (anticlockwise) {
var tmp = startAngle;
startAngle = normalizeRadian(endAngle);
endAngle = normalizeRadian(tmp);
} else {
startAngle = normalizeRadian(startAngle);
endAngle = normalizeRadian(endAngle);
}
if (startAngle > endAngle) {
endAngle += PI2;
}
var angle = Math.atan2(y, x);
if (angle < 0) {
angle += PI2;
}
return (angle >= startAngle && angle <= endAngle)
|| (angle + PI2 >= startAngle && angle + PI2 <= endAngle);
}
};
});