cione-comp-lib
Version:
`$ yarn add cione-comp-lib` 或者 `$ npm i cione-comp-lib -S`
24 lines (23 loc) • 561 B
JavaScript
import windingLine from "./windingLine.mjs";
var EPSILON = 1e-8;
function isAroundEqual(a, b) {
return Math.abs(a - b) < EPSILON;
}
function contain(points, x, y) {
var w = 0;
var p = points[0];
if (!p) {
return false;
}
for (var i = 1; i < points.length; i++) {
var p2 = points[i];
w += windingLine(p[0], p[1], p2[0], p2[1], x, y);
p = p2;
}
var p0 = points[0];
if (!isAroundEqual(p[0], p0[0]) || !isAroundEqual(p[1], p0[1])) {
w += windingLine(p[0], p[1], p0[0], p0[1], x, y);
}
return w !== 0;
}
export { contain };