text: /*************************************************************************/
  /*  concave_polygon_shape_2d.cpp                                         */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  
  #include "concave_polygon_shape_2d.h"
  
  #include "servers/physics_2d_server.h"
  #include "servers/visual_server.h"
  
  bool ConcavePolygonShape2D::_edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const {
  
  	PoolVector<Vector2> s = get_segments();
  	int len = s.size();
  	if (len == 0 || (len % 2) == 1)
  		return false;
  
  	PoolVector<Vector2>::Read r = s.read();
  	for (int i = 0; i < len; i += 2) {
  		Vector2 closest = Geometry::get_closest_point_to_segment_2d(p_point, &r[i]);
  		if (p_point.distance_to(closest) < p_tolerance)
  			return true;
  	}
  
  	return false;
  }
  
  void ConcavePolygonShape2D::set_segments(const PoolVector<Vector2> &p_segments) {
  
  	Physics2DServer::get_singleton()->shape_set_data(get_rid(), p_segments);
  	emit_changed();
  }
  
  PoolVector<Vector2> ConcavePolygonShape2D::get_segments() const {
  
  	return Physics2DServer::get_singleton()->shape_get_data(get_rid());
  }
  
  void ConcavePolygonShape2D::draw(const RID &p_to_rid, const Color &p_color) {
  
  	PoolVector<Vector2> s = get_segments();
  	int len = s.size();
  	if (len == 0 || (len % 2) == 1)
  		return;
  
  	PoolVector<Vector2>::Read r = s.read();
  	for (int i = 0; i < len; i += 2) {
  		VisualServer::get_singleton()->canvas_item_add_line(p_to_rid, r[i], r[i + 1], p_color, 2);
  	}
  }
  
  Rect2 ConcavePolygonShape2D::get_rect() const {
  
  	PoolVector<Vector2> s = get_segments();
  	int len = s.size();
  	if (len == 0)
  		return Rect2();
  
  	Rect2 rect;
  
  	PoolVector<Vector2>::Read r = s.read();
  	for (int i = 0; i < len; i++) {
  		if (i == 0)
  			rect.position = r[i];
  		else
  			rect.expand_to(r[i]);
  	}
  
  	return rect;
  }
  
  void ConcavePolygonShape2D::_bind_methods() {
  
  	ClassDB::bind_method(D_METHOD("set_segments", "segments"), &ConcavePolygonShape2D::set_segments);
  	ClassDB::bind_method(D_METHOD("get_segments"), &ConcavePolygonShape2D::get_segments);
  
  	ADD_PROPERTY(PropertyInfo(Variant::POOL_VECTOR2_ARRAY, "segments"), "set_segments", "get_segments");
  }
  
  ConcavePolygonShape2D::ConcavePolygonShape2D() :
  		Shape2D(Physics2DServer::get_singleton()->concave_polygon_shape_create()) {
  }
  