@phaserjs/phaser/geom/triangle/GetTriangleRandomPoint.js

Phaser 4

/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2020 Photon Storm Ltd.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */
import { Vec2 } from "../../math/vec2/Vec2";
export function GetTriangleRandomPoint(triangle, out = new Vec2()) {
  const { x1, y1, x2, y2, x3, y3 } = triangle;
  const ux = x2 - x1;
  const uy = y2 - y1;
  const vx = x3 - x1;
  const vy = y3 - y1;
  let r = Math.random();
  let s = Math.random();
  if (r + s >= 1) {
    r = 1 - r;
    s = 1 - s;
  }
  return out.set(x1 + (ux * r + vx * s), y1 + (uy * r + vy * s));
}