aaac7fed
 liuqimichale
add
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var _util = require("./util");
var normalizeRadian = _util.normalizeRadian;
var PI2 = Math.PI * 2;
/**
* 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}
*/
function containStroke(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;
}
exports.containStroke = containStroke;
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