36 lines
992 B
JavaScript
36 lines
992 B
JavaScript
|
import { normalizeRadian } from './util.js';
|
||
|
|
var PI2 = Math.PI * 2;
|
||
|
|
export 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) {
|
||
|
|
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);
|
||
|
|
}
|