Method intersectPolygon2D

src/Op.ts:224–236

* Given a line segemnt or a ray (infinite line), find its intersection point(s) with a polygon. * @param lineOrRay a Group or an Iterable with 2 Pt representing a line or ray * @param poly a Group or an Iterable representing a polygon * @param sourceIsRay a boolean value to treat th

( lineOrRay:PtIterable, poly:PtIterable, sourceIsRay:boolean=false )

   * @param sourceIsRay a boolean value to treat the line as a ray (infinite line). Default is `false`.
   */
  static intersectPolygon2D( lineOrRay:PtIterable, poly:PtIterable, sourceIsRay:boolean=false ):Group {
    let _lineOrRay = Util.iterToArray( lineOrRay );
    let _poly = Util.iterToArray( poly );

    let fn = sourceIsRay ? Line.intersectLineWithRay2D : Line.intersectLine2D; 
    let pts = new Group();
    for (let i=0, len=_poly.length; i<len; i++) {
      let next = (i === len-1) ? 0 : i+1;
      let d = fn( [_poly[i], _poly[next]], _lineOrRay );
      if (d) pts.push( d ); 
    }
    return (pts.length > 0) ? pts : undefined;
  } 


  /**