/*************************************************************************/
/*  tile_map.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     */
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/*************************************************************************/

#include "tile_map.h"

#include "core/io/marshalls.h"
#include "core/method_bind_ext.gen.inc"
#include "core/os/os.h"
#include "servers/physics_2d_server.h"

int TileMap::_get_quadrant_size() const {

	if (y_sort_mode)
		return 1;
	else
		return quadrant_size;
}

void TileMap::_notification(int p_what) {

	switch (p_what) {

		case NOTIFICATION_ENTER_TREE: {

			Node2D *c = this;
			while (c) {

				navigation = Object::cast_to<Navigation2D>(c);
				if (navigation) {
					break;
				}

				c = Object::cast_to<Node2D>(c->get_parent());
			}

			pending_update = true;
			_recreate_quadrants();
			update_dirty_quadrants();
			RID space = get_world_2d()->get_space();
			_update_quadrant_transform();
			_update_quadrant_space(space);

		} break;
		case NOTIFICATION_EXIT_TREE: {

			_update_quadrant_space(RID());
			for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

				Quadrant &q = E->get();
				if (navigation) {
					for (Map<PosKey, Quadrant::NavPoly>::Element *E = q.navpoly_ids.front(); E; E = E->next()) {

						navigation->navpoly_remove(E->get().id);
					}
					q.navpoly_ids.clear();
				}

				for (Map<PosKey, Quadrant::Occluder>::Element *E = q.occluder_instances.front(); E; E = E->next()) {
					VS::get_singleton()->free(E->get().id);
				}
				q.occluder_instances.clear();
			}

			navigation = NULL;

		} break;
		case NOTIFICATION_TRANSFORM_CHANGED: {

			//move stuff
			_update_quadrant_transform();

		} break;
	}
}

void TileMap::_update_quadrant_space(const RID &p_space) {

	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Physics2DServer::get_singleton()->body_set_space(q.body, p_space);
	}
}

void TileMap::_update_quadrant_transform() {

	if (!is_inside_tree())
		return;

	Transform2D global_transform = get_global_transform();

	Transform2D nav_rel;
	if (navigation)
		nav_rel = get_relative_transform_to_parent(navigation);

	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Transform2D xform;
		xform.set_origin(q.pos);
		xform = global_transform * xform;
		Physics2DServer::get_singleton()->body_set_state(q.body, Physics2DServer::BODY_STATE_TRANSFORM, xform);

		if (navigation) {
			for (Map<PosKey, Quadrant::NavPoly>::Element *E = q.navpoly_ids.front(); E; E = E->next()) {

				navigation->navpoly_set_transform(E->get().id, nav_rel * E->get().xform);
			}
		}

		for (Map<PosKey, Quadrant::Occluder>::Element *E = q.occluder_instances.front(); E; E = E->next()) {
			VS::get_singleton()->canvas_light_occluder_set_transform(E->get().id, global_transform * E->get().xform);
		}
	}
}

void TileMap::set_tileset(const Ref<TileSet> &p_tileset) {

	if (tile_set.is_valid()) {
		tile_set->disconnect("changed", this, "_recreate_quadrants");
		tile_set->remove_change_receptor(this);
	}

	_clear_quadrants();
	tile_set = p_tileset;

	if (tile_set.is_valid()) {
		tile_set->connect("changed", this, "_recreate_quadrants");
		tile_set->add_change_receptor(this);
	} else {
		clear();
	}

	_recreate_quadrants();
	emit_signal("settings_changed");
}

Ref<TileSet> TileMap::get_tileset() const {

	return tile_set;
}

void TileMap::set_cell_size(Size2 p_size) {

	ERR_FAIL_COND(p_size.x < 1 || p_size.y < 1);

	_clear_quadrants();
	cell_size = p_size;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

Size2 TileMap::get_cell_size() const {

	return cell_size;
}

void TileMap::set_quadrant_size(int p_size) {

	ERR_FAIL_COND(p_size < 1);

	_clear_quadrants();
	quadrant_size = p_size;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

int TileMap::get_quadrant_size() const {

	return quadrant_size;
}

void TileMap::_fix_cell_transform(Transform2D &xform, const Cell &p_cell, const Vector2 &p_offset, const Size2 &p_sc) {

	Size2 s = p_sc;
	Vector2 offset = p_offset;

	if (tile_origin == TILE_ORIGIN_BOTTOM_LEFT)
		offset.y += cell_size.y;
	else if (tile_origin == TILE_ORIGIN_CENTER) {
		offset += cell_size / 2;
	}

	if (s.y > s.x) {
		if ((p_cell.flip_h && (p_cell.flip_v || p_cell.transpose)) || (p_cell.flip_v && !p_cell.transpose))
			offset.y += s.y - s.x;
	} else if (s.y < s.x) {
		if ((p_cell.flip_v && (p_cell.flip_h || p_cell.transpose)) || (p_cell.flip_h && !p_cell.transpose))
			offset.x += s.x - s.y;
	}

	if (p_cell.transpose) {
		SWAP(xform.elements[0].x, xform.elements[0].y);
		SWAP(xform.elements[1].x, xform.elements[1].y);
		SWAP(offset.x, offset.y);
		SWAP(s.x, s.y);
	}
	if (p_cell.flip_h) {
		xform.elements[0].x = -xform.elements[0].x;
		xform.elements[1].x = -xform.elements[1].x;
		if (tile_origin == TILE_ORIGIN_TOP_LEFT || tile_origin == TILE_ORIGIN_BOTTOM_LEFT)
			offset.x = s.x - offset.x;
		else if (tile_origin == TILE_ORIGIN_CENTER)
			offset.x = s.x - offset.x / 2;
	}
	if (p_cell.flip_v) {
		xform.elements[0].y = -xform.elements[0].y;
		xform.elements[1].y = -xform.elements[1].y;
		if (tile_origin == TILE_ORIGIN_TOP_LEFT)
			offset.y = s.y - offset.y;
		else if (tile_origin == TILE_ORIGIN_BOTTOM_LEFT) {
			offset.y += s.y;
		} else if (tile_origin == TILE_ORIGIN_CENTER) {
			offset.y += s.y;
		}
	}
	xform.elements[2].x += offset.x;
	xform.elements[2].y += offset.y;
}

void TileMap::update_dirty_quadrants() {

	if (!pending_update)
		return;
	if (!is_inside_tree() || !tile_set.is_valid()) {
		pending_update = false;
		return;
	}

	VisualServer *vs = VisualServer::get_singleton();
	Physics2DServer *ps = Physics2DServer::get_singleton();
	Vector2 tofs = get_cell_draw_offset();
	Vector2 tcenter = cell_size / 2;
	Transform2D nav_rel;
	if (navigation)
		nav_rel = get_relative_transform_to_parent(navigation);

	Vector2 qofs;

	SceneTree *st = SceneTree::get_singleton();
	Color debug_collision_color;
	Color debug_navigation_color;

	bool debug_shapes = st && st->is_debugging_collisions_hint();
	if (debug_shapes) {
		debug_collision_color = st->get_debug_collisions_color();
	}

	bool debug_navigation = st && st->is_debugging_navigation_hint();
	if (debug_navigation) {
		debug_navigation_color = st->get_debug_navigation_color();
	}

	while (dirty_quadrant_list.first()) {

		Quadrant &q = *dirty_quadrant_list.first()->self();

		for (List<RID>::Element *E = q.canvas_items.front(); E; E = E->next()) {

			vs->free(E->get());
		}

		q.canvas_items.clear();

		ps->body_clear_shapes(q.body);
		int shape_idx = 0;

		if (navigation) {
			for (Map<PosKey, Quadrant::NavPoly>::Element *E = q.navpoly_ids.front(); E; E = E->next()) {

				navigation->navpoly_remove(E->get().id);
			}
			q.navpoly_ids.clear();
		}

		for (Map<PosKey, Quadrant::Occluder>::Element *E = q.occluder_instances.front(); E; E = E->next()) {
			VS::get_singleton()->free(E->get().id);
		}
		q.occluder_instances.clear();
		Ref<ShaderMaterial> prev_material;
		int prev_z_index;
		RID prev_canvas_item;
		RID prev_debug_canvas_item;

		for (int i = 0; i < q.cells.size(); i++) {

			Map<PosKey, Cell>::Element *E = tile_map.find(q.cells[i]);
			Cell &c = E->get();
			//moment of truth
			if (!tile_set->has_tile(c.id))
				continue;
			Ref<Texture> tex = tile_set->tile_get_texture(c.id);
			Vector2 tile_ofs = tile_set->tile_get_texture_offset(c.id);

			Vector2 wofs = _map_to_world(E->key().x, E->key().y);
			Vector2 offset = wofs - q.pos + tofs;

			if (!tex.is_valid())
				continue;

			Ref<ShaderMaterial> mat = tile_set->tile_get_material(c.id);
			int z_index = tile_set->tile_get_z_index(c.id);

			RID canvas_item;
			RID debug_canvas_item;

			if (prev_canvas_item == RID() || prev_material != mat || prev_z_index != z_index) {

				canvas_item = vs->canvas_item_create();
				if (mat.is_valid())
					vs->canvas_item_set_material(canvas_item, mat->get_rid());
				vs->canvas_item_set_parent(canvas_item, get_canvas_item());
				_update_item_material_state(canvas_item);
				Transform2D xform;
				xform.set_origin(q.pos);
				vs->canvas_item_set_transform(canvas_item, xform);
				vs->canvas_item_set_light_mask(canvas_item, get_light_mask());
				vs->canvas_item_set_z_index(canvas_item, z_index);

				q.canvas_items.push_back(canvas_item);

				if (debug_shapes) {

					debug_canvas_item = vs->canvas_item_create();
					vs->canvas_item_set_parent(debug_canvas_item, canvas_item);
					vs->canvas_item_set_z_as_relative_to_parent(debug_canvas_item, false);
					vs->canvas_item_set_z_index(debug_canvas_item, VS::CANVAS_ITEM_Z_MAX - 1);
					q.canvas_items.push_back(debug_canvas_item);
					prev_debug_canvas_item = debug_canvas_item;
				}

				prev_canvas_item = canvas_item;
				prev_material = mat;
				prev_z_index = z_index;

			} else {
				canvas_item = prev_canvas_item;
				if (debug_shapes) {
					debug_canvas_item = prev_debug_canvas_item;
				}
			}

			Rect2 r = tile_set->tile_get_region(c.id);
			if (tile_set->tile_get_tile_mode(c.id) == TileSet::AUTO_TILE || tile_set->tile_get_tile_mode(c.id) == TileSet::ATLAS_TILE) {
				int spacing = tile_set->autotile_get_spacing(c.id);
				r.size = tile_set->autotile_get_size(c.id);
				r.position += (r.size + Vector2(spacing, spacing)) * Vector2(c.autotile_coord_x, c.autotile_coord_y);
			}
			Size2 s = tex->get_size();

			if (r == Rect2())
				s = tex->get_size();
			else {
				s = r.size;
			}

			Rect2 rect;
			rect.position = offset.floor();
			rect.size = s;
			rect.size.x += fp_adjust;
			rect.size.y += fp_adjust;

			if (rect.size.y > rect.size.x) {
				if ((c.flip_h && (c.flip_v || c.transpose)) || (c.flip_v && !c.transpose))
					tile_ofs.y += rect.size.y - rect.size.x;
			} else if (rect.size.y < rect.size.x) {
				if ((c.flip_v && (c.flip_h || c.transpose)) || (c.flip_h && !c.transpose))
					tile_ofs.x += rect.size.x - rect.size.y;
			}

			/*	rect.size.x+=fp_adjust;
			rect.size.y+=fp_adjust;*/

			if (c.transpose)
				SWAP(tile_ofs.x, tile_ofs.y);

			if (c.flip_h) {
				rect.size.x = -rect.size.x;
				tile_ofs.x = -tile_ofs.x;
			}
			if (c.flip_v) {
				rect.size.y = -rect.size.y;
				tile_ofs.y = -tile_ofs.y;
			}

			Vector2 center_ofs;

			if (tile_origin == TILE_ORIGIN_TOP_LEFT) {
				rect.position += tile_ofs;

			} else if (tile_origin == TILE_ORIGIN_BOTTOM_LEFT) {

				rect.position += tile_ofs;

				if (c.transpose) {
					if (c.flip_h)
						rect.position.x -= cell_size.x;
					else
						rect.position.x += cell_size.x;
				} else {
					if (c.flip_v)
						rect.position.y -= cell_size.y;
					else
						rect.position.y += cell_size.y;
				}

			} else if (tile_origin == TILE_ORIGIN_CENTER) {

				rect.position += tile_ofs;

				if (c.flip_h)
					rect.position.x -= cell_size.x / 2;
				else
					rect.position.x += cell_size.x / 2;

				if (c.flip_v)
					rect.position.y -= cell_size.y / 2;
				else
					rect.position.y += cell_size.y / 2;
			}

			Ref<Texture> normal_map = tile_set->tile_get_normal_map(c.id);
			Color modulate = tile_set->tile_get_modulate(c.id);
			Color self_modulate = get_self_modulate();
			modulate = Color(modulate.r * self_modulate.r, modulate.g * self_modulate.g,
					modulate.b * self_modulate.b, modulate.a * self_modulate.a);
			if (r == Rect2()) {
				tex->draw_rect(canvas_item, rect, false, modulate, c.transpose, normal_map);
			} else {
				tex->draw_rect_region(canvas_item, rect, r, modulate, c.transpose, normal_map, clip_uv);
			}

			Vector<TileSet::ShapeData> shapes = tile_set->tile_get_shapes(c.id);

			for (int i = 0; i < shapes.size(); i++) {
				Ref<Shape2D> shape = shapes[i].shape;
				if (shape.is_valid()) {
					if (tile_set->tile_get_tile_mode(c.id) == TileSet::SINGLE_TILE || (shapes[i].autotile_coord.x == c.autotile_coord_x && shapes[i].autotile_coord.y == c.autotile_coord_y)) {
						Transform2D xform;
						xform.set_origin(offset.floor());

						Vector2 shape_ofs = shapes[i].shape_transform.get_origin();

						_fix_cell_transform(xform, c, shape_ofs + center_ofs, s);

						xform *= shapes[i].shape_transform.untranslated();

						if (debug_canvas_item.is_valid()) {
							vs->canvas_item_add_set_transform(debug_canvas_item, xform);
							shape->draw(debug_canvas_item, debug_collision_color);
						}
						ps->body_add_shape(q.body, shape->get_rid(), xform);
						ps->body_set_shape_metadata(q.body, shape_idx, Vector2(E->key().x, E->key().y));
						ps->body_set_shape_as_one_way_collision(q.body, shape_idx, shapes[i].one_way_collision);
						shape_idx++;
					}
				}
			}

			if (debug_canvas_item.is_valid()) {
				vs->canvas_item_add_set_transform(debug_canvas_item, Transform2D());
			}

			if (navigation) {
				Ref<NavigationPolygon> navpoly;
				Vector2 npoly_ofs;
				if (tile_set->tile_get_tile_mode(c.id) == TileSet::AUTO_TILE || tile_set->tile_get_tile_mode(c.id) == TileSet::ATLAS_TILE) {
					navpoly = tile_set->autotile_get_navigation_polygon(c.id, Vector2(c.autotile_coord_x, c.autotile_coord_y));
					npoly_ofs = Vector2();
				} else {
					navpoly = tile_set->tile_get_navigation_polygon(c.id);
					npoly_ofs = tile_set->tile_get_navigation_polygon_offset(c.id);
				}

				if (navpoly.is_valid()) {
					Transform2D xform;
					xform.set_origin(offset.floor() + q.pos);
					_fix_cell_transform(xform, c, npoly_ofs + center_ofs, s);

					int pid = navigation->navpoly_add(navpoly, nav_rel * xform);

					Quadrant::NavPoly np;
					np.id = pid;
					np.xform = xform;
					q.navpoly_ids[E->key()] = np;

					if (debug_navigation) {
						RID debug_navigation_item = vs->canvas_item_create();
						vs->canvas_item_set_parent(debug_navigation_item, canvas_item);
						vs->canvas_item_set_z_as_relative_to_parent(debug_navigation_item, false);
						vs->canvas_item_set_z_index(debug_navigation_item, VS::CANVAS_ITEM_Z_MAX - 2); // Display one below collision debug

						if (debug_navigation_item.is_valid()) {
							PoolVector<Vector2> navigation_polygon_vertices = navpoly->get_vertices();
							int vsize = navigation_polygon_vertices.size();

							if (vsize > 2) {
								Vector<Color> colors;
								Vector<Vector2> vertices;
								vertices.resize(vsize);
								colors.resize(vsize);
								{
									PoolVector<Vector2>::Read vr = navigation_polygon_vertices.read();
									for (int i = 0; i < vsize; i++) {
										vertices.write[i] = vr[i];
										colors.write[i] = debug_navigation_color;
									}
								}

								Vector<int> indices;

								for (int i = 0; i < navpoly->get_polygon_count(); i++) {
									Vector<int> polygon = navpoly->get_polygon(i);

									for (int j = 2; j < polygon.size(); j++) {

										int kofs[3] = { 0, j - 1, j };
										for (int k = 0; k < 3; k++) {

											int idx = polygon[kofs[k]];
											ERR_FAIL_INDEX(idx, vsize);
											indices.push_back(idx);
										}
									}
								}
								Transform2D navxform;
								navxform.set_origin(offset.floor());
								_fix_cell_transform(navxform, c, npoly_ofs + center_ofs, s);

								vs->canvas_item_set_transform(debug_navigation_item, navxform);
								vs->canvas_item_add_triangle_array(debug_navigation_item, indices, vertices, colors);
							}
						}
					}
				}
			}

			Ref<OccluderPolygon2D> occluder;
			if (tile_set->tile_get_tile_mode(c.id) == TileSet::AUTO_TILE || tile_set->tile_get_tile_mode(c.id) == TileSet::ATLAS_TILE) {
				occluder = tile_set->autotile_get_light_occluder(c.id, Vector2(c.autotile_coord_x, c.autotile_coord_y));
			} else {
				occluder = tile_set->tile_get_light_occluder(c.id);
			}
			if (occluder.is_valid()) {
				Vector2 occluder_ofs = tile_set->tile_get_occluder_offset(c.id);
				Transform2D xform;
				xform.set_origin(offset.floor() + q.pos);
				_fix_cell_transform(xform, c, occluder_ofs + center_ofs, s);

				RID orid = VS::get_singleton()->canvas_light_occluder_create();
				VS::get_singleton()->canvas_light_occluder_set_transform(orid, get_global_transform() * xform);
				VS::get_singleton()->canvas_light_occluder_set_polygon(orid, occluder->get_rid());
				VS::get_singleton()->canvas_light_occluder_attach_to_canvas(orid, get_canvas());
				VS::get_singleton()->canvas_light_occluder_set_light_mask(orid, occluder_light_mask);
				Quadrant::Occluder oc;
				oc.xform = xform;
				oc.id = orid;
				q.occluder_instances[E->key()] = oc;
			}
		}

		dirty_quadrant_list.remove(dirty_quadrant_list.first());
		quadrant_order_dirty = true;
	}

	pending_update = false;

	if (quadrant_order_dirty) {

		int index = -0x80000000; //always must be drawn below children
		for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

			Quadrant &q = E->get();
			for (List<RID>::Element *E = q.canvas_items.front(); E; E = E->next()) {

				VS::get_singleton()->canvas_item_set_draw_index(E->get(), index++);
			}
		}

		quadrant_order_dirty = false;
	}

	_recompute_rect_cache();
}

void TileMap::_recompute_rect_cache() {

#ifdef DEBUG_ENABLED

	if (!rect_cache_dirty)
		return;

	Rect2 r_total;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Rect2 r;
		r.position = _map_to_world(E->key().x * _get_quadrant_size(), E->key().y * _get_quadrant_size());
		r.expand_to(_map_to_world(E->key().x * _get_quadrant_size() + _get_quadrant_size(), E->key().y * _get_quadrant_size()));
		r.expand_to(_map_to_world(E->key().x * _get_quadrant_size() + _get_quadrant_size(), E->key().y * _get_quadrant_size() + _get_quadrant_size()));
		r.expand_to(_map_to_world(E->key().x * _get_quadrant_size(), E->key().y * _get_quadrant_size() + _get_quadrant_size()));
		if (E == quadrant_map.front())
			r_total = r;
		else
			r_total = r_total.merge(r);
	}

	rect_cache = r_total;

	item_rect_changed();

	rect_cache_dirty = false;
#endif
}

Map<TileMap::PosKey, TileMap::Quadrant>::Element *TileMap::_create_quadrant(const PosKey &p_qk) {

	Transform2D xform;
	//xform.set_origin(Point2(p_qk.x,p_qk.y)*cell_size*quadrant_size);
	Quadrant q;
	q.pos = _map_to_world(p_qk.x * _get_quadrant_size(), p_qk.y * _get_quadrant_size());
	q.pos += get_cell_draw_offset();
	if (tile_origin == TILE_ORIGIN_CENTER)
		q.pos += cell_size / 2;
	else if (tile_origin == TILE_ORIGIN_BOTTOM_LEFT)
		q.pos.y += cell_size.y;

	xform.set_origin(q.pos);
	//q.canvas_item = VisualServer::get_singleton()->canvas_item_create();
	q.body = Physics2DServer::get_singleton()->body_create();
	Physics2DServer::get_singleton()->body_set_mode(q.body, use_kinematic ? Physics2DServer::BODY_MODE_KINEMATIC : Physics2DServer::BODY_MODE_STATIC);

	Physics2DServer::get_singleton()->body_attach_object_instance_id(q.body, get_instance_id());
	Physics2DServer::get_singleton()->body_set_collision_layer(q.body, collision_layer);
	Physics2DServer::get_singleton()->body_set_collision_mask(q.body, collision_mask);
	Physics2DServer::get_singleton()->body_set_param(q.body, Physics2DServer::BODY_PARAM_FRICTION, friction);
	Physics2DServer::get_singleton()->body_set_param(q.body, Physics2DServer::BODY_PARAM_BOUNCE, bounce);

	if (is_inside_tree()) {
		xform = get_global_transform() * xform;
		RID space = get_world_2d()->get_space();
		Physics2DServer::get_singleton()->body_set_space(q.body, space);
	}

	Physics2DServer::get_singleton()->body_set_state(q.body, Physics2DServer::BODY_STATE_TRANSFORM, xform);

	rect_cache_dirty = true;
	quadrant_order_dirty = true;
	return quadrant_map.insert(p_qk, q);
}

void TileMap::_erase_quadrant(Map<PosKey, Quadrant>::Element *Q) {

	Quadrant &q = Q->get();
	Physics2DServer::get_singleton()->free(q.body);
	for (List<RID>::Element *E = q.canvas_items.front(); E; E = E->next()) {

		VisualServer::get_singleton()->free(E->get());
	}
	q.canvas_items.clear();
	if (q.dirty_list.in_list())
		dirty_quadrant_list.remove(&q.dirty_list);

	if (navigation) {
		for (Map<PosKey, Quadrant::NavPoly>::Element *E = q.navpoly_ids.front(); E; E = E->next()) {

			navigation->navpoly_remove(E->get().id);
		}
		q.navpoly_ids.clear();
	}

	for (Map<PosKey, Quadrant::Occluder>::Element *E = q.occluder_instances.front(); E; E = E->next()) {
		VS::get_singleton()->free(E->get().id);
	}
	q.occluder_instances.clear();

	quadrant_map.erase(Q);
	rect_cache_dirty = true;
}

void TileMap::_make_quadrant_dirty(Map<PosKey, Quadrant>::Element *Q, bool update) {

	Quadrant &q = Q->get();
	if (!q.dirty_list.in_list())
		dirty_quadrant_list.add(&q.dirty_list);

	if (pending_update)
		return;
	pending_update = true;
	if (!is_inside_tree())
		return;

	if (update) {
		call_deferred("update_dirty_quadrants");
	}
}

void TileMap::set_cellv(const Vector2 &p_pos, int p_tile, bool p_flip_x, bool p_flip_y, bool p_transpose) {

	set_cell(p_pos.x, p_pos.y, p_tile, p_flip_x, p_flip_y, p_transpose);
}

void TileMap::_set_celld(const Vector2 &p_pos, const Dictionary &p_data) {

	set_cell(p_pos.x, p_pos.y, p_data["id"], p_data["flip_h"], p_data["flip_y"], p_data["transpose"], p_data["auto_coord"]);
}

void TileMap::set_cell(int p_x, int p_y, int p_tile, bool p_flip_x, bool p_flip_y, bool p_transpose, Vector2 p_autotile_coord) {

	PosKey pk(p_x, p_y);

	Map<PosKey, Cell>::Element *E = tile_map.find(pk);
	if (!E && p_tile == INVALID_CELL)
		return; //nothing to do

	PosKey qk(p_x / _get_quadrant_size(), p_y / _get_quadrant_size());
	if (p_tile == INVALID_CELL) {
		//erase existing
		tile_map.erase(pk);
		Map<PosKey, Quadrant>::Element *Q = quadrant_map.find(qk);
		ERR_FAIL_COND(!Q);
		Quadrant &q = Q->get();
		q.cells.erase(pk);
		if (q.cells.size() == 0)
			_erase_quadrant(Q);
		else
			_make_quadrant_dirty(Q);

		return;
	}

	Map<PosKey, Quadrant>::Element *Q = quadrant_map.find(qk);

	if (!E) {
		E = tile_map.insert(pk, Cell());
		if (!Q) {
			Q = _create_quadrant(qk);
		}
		Quadrant &q = Q->get();
		q.cells.insert(pk);
	} else {
		ERR_FAIL_COND(!Q); // quadrant should exist...

		if (E->get().id == p_tile && E->get().flip_h == p_flip_x && E->get().flip_v == p_flip_y && E->get().transpose == p_transpose && E->get().autotile_coord_x == (uint16_t)p_autotile_coord.x && E->get().autotile_coord_y == (uint16_t)p_autotile_coord.y)
			return; //nothing changed
	}

	Cell &c = E->get();

	c.id = p_tile;
	c.flip_h = p_flip_x;
	c.flip_v = p_flip_y;
	c.transpose = p_transpose;
	c.autotile_coord_x = (uint16_t)p_autotile_coord.x;
	c.autotile_coord_y = (uint16_t)p_autotile_coord.y;

	_make_quadrant_dirty(Q);
	used_size_cache_dirty = true;
}

int TileMap::get_cellv(const Vector2 &p_pos) const {

	return get_cell(p_pos.x, p_pos.y);
}

void TileMap::make_bitmask_area_dirty(const Vector2 &p_pos) {

	for (int x = p_pos.x - 1; x <= p_pos.x + 1; x++) {
		for (int y = p_pos.y - 1; y <= p_pos.y + 1; y++) {
			PosKey p(x, y);
			if (dirty_bitmask.find(p) == NULL) {
				dirty_bitmask.push_back(p);
			}
		}
	}
}

void TileMap::update_bitmask_area(const Vector2 &p_pos) {

	for (int x = p_pos.x - 1; x <= p_pos.x + 1; x++) {
		for (int y = p_pos.y - 1; y <= p_pos.y + 1; y++) {
			update_cell_bitmask(x, y);
		}
	}
}

void TileMap::update_bitmask_region(const Vector2 &p_start, const Vector2 &p_end) {

	if ((p_end.x < p_start.x || p_end.y < p_start.y) || (p_end.x == p_start.x && p_end.y == p_start.y)) {
		int i;
		Array a = get_used_cells();
		for (i = 0; i < a.size(); i++) {
			// update_bitmask_area() in order to update cells adjacent to the
			// current cell, since ordering in array may not be reliable
			Vector2 vector = (Vector2)a[i];
			update_bitmask_area(Vector2(vector.x, vector.y));
		}
		return;
	}
	for (int x = p_start.x - 1; x <= p_end.x + 1; x++) {
		for (int y = p_start.y - 1; y <= p_end.y + 1; y++) {
			update_cell_bitmask(x, y);
		}
	}
}

void TileMap::update_cell_bitmask(int p_x, int p_y) {

	PosKey p(p_x, p_y);
	Map<PosKey, Cell>::Element *E = tile_map.find(p);
	if (E != NULL) {
		int id = get_cell(p_x, p_y);
		if (tile_set->tile_get_tile_mode(id) == TileSet::AUTO_TILE || tile_set->tile_get_tile_mode(id) == TileSet::ATLAS_TILE) {
			uint16_t mask = 0;
			if (tile_set->autotile_get_bitmask_mode(id) == TileSet::BITMASK_2X2) {
				if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y))) {
					mask |= TileSet::BIND_TOPLEFT;
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y))) {
					mask |= TileSet::BIND_TOPRIGHT;
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y))) {
					mask |= TileSet::BIND_BOTTOMLEFT;
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y))) {
					mask |= TileSet::BIND_BOTTOMRIGHT;
				}
			} else {
				if (tile_set->autotile_get_bitmask_mode(id) == TileSet::BITMASK_3X3_MINIMAL) {
					if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y))) {
						mask |= TileSet::BIND_TOPLEFT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y - 1)) && tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y))) {
						mask |= TileSet::BIND_TOPRIGHT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y))) {
						mask |= TileSet::BIND_BOTTOMLEFT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x, p_y + 1)) && tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y))) {
						mask |= TileSet::BIND_BOTTOMRIGHT;
					}
				} else {
					if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y - 1))) {
						mask |= TileSet::BIND_TOPLEFT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y - 1))) {
						mask |= TileSet::BIND_TOPRIGHT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y + 1))) {
						mask |= TileSet::BIND_BOTTOMLEFT;
					}
					if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y + 1))) {
						mask |= TileSet::BIND_BOTTOMRIGHT;
					}
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x, p_y - 1))) {
					mask |= TileSet::BIND_TOP;
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x - 1, p_y))) {
					mask |= TileSet::BIND_LEFT;
				}
				mask |= TileSet::BIND_CENTER;
				if (tile_set->is_tile_bound(id, get_cell(p_x + 1, p_y))) {
					mask |= TileSet::BIND_RIGHT;
				}
				if (tile_set->is_tile_bound(id, get_cell(p_x, p_y + 1))) {
					mask |= TileSet::BIND_BOTTOM;
				}
			}
			Vector2 coord = tile_set->autotile_get_subtile_for_bitmask(id, mask, this, Vector2(p_x, p_y));
			E->get().autotile_coord_x = (int)coord.x;
			E->get().autotile_coord_y = (int)coord.y;

			PosKey qk(p_x / _get_quadrant_size(), p_y / _get_quadrant_size());
			Map<PosKey, Quadrant>::Element *Q = quadrant_map.find(qk);
			_make_quadrant_dirty(Q);
		} else {
			E->get().autotile_coord_x = 0;
			E->get().autotile_coord_y = 0;
		}
	}
}

void TileMap::update_dirty_bitmask() {

	while (dirty_bitmask.size() > 0) {
		update_cell_bitmask(dirty_bitmask[0].x, dirty_bitmask[0].y);
		dirty_bitmask.pop_front();
	}
}

void TileMap::fix_invalid_tiles() {

	for (Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {

		if (!tile_set->has_tile(get_cell(E->key().x, E->key().y))) {
			set_cell(E->key().x, E->key().y, INVALID_CELL);
		}
	}
}

int TileMap::get_cell(int p_x, int p_y) const {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return INVALID_CELL;

	return E->get().id;
}
bool TileMap::is_cell_x_flipped(int p_x, int p_y) const {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return false;

	return E->get().flip_h;
}
bool TileMap::is_cell_y_flipped(int p_x, int p_y) const {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return false;

	return E->get().flip_v;
}
bool TileMap::is_cell_transposed(int p_x, int p_y) const {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return false;

	return E->get().transpose;
}

void TileMap::set_cell_autotile_coord(int p_x, int p_y, const Vector2 &p_coord) {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return;

	Cell c = E->get();
	c.autotile_coord_x = p_coord.x;
	c.autotile_coord_y = p_coord.y;
	tile_map[pk] = c;

	PosKey qk(p_x / _get_quadrant_size(), p_y / _get_quadrant_size());
	Map<PosKey, Quadrant>::Element *Q = quadrant_map.find(qk);

	if (!Q)
		return;

	_make_quadrant_dirty(Q);
}

Vector2 TileMap::get_cell_autotile_coord(int p_x, int p_y) const {

	PosKey pk(p_x, p_y);

	const Map<PosKey, Cell>::Element *E = tile_map.find(pk);

	if (!E)
		return Vector2();

	return Vector2(E->get().autotile_coord_x, E->get().autotile_coord_y);
}

void TileMap::_recreate_quadrants() {

	_clear_quadrants();

	for (Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {

		PosKey qk(E->key().x / _get_quadrant_size(), E->key().y / _get_quadrant_size());

		Map<PosKey, Quadrant>::Element *Q = quadrant_map.find(qk);
		if (!Q) {
			Q = _create_quadrant(qk);
			dirty_quadrant_list.add(&Q->get().dirty_list);
		}

		Q->get().cells.insert(E->key());
		_make_quadrant_dirty(Q, false);
	}
	update_dirty_quadrants();
}

void TileMap::_clear_quadrants() {

	while (quadrant_map.size()) {
		_erase_quadrant(quadrant_map.front());
	}
}

void TileMap::set_material(const Ref<Material> &p_material) {

	CanvasItem::set_material(p_material);
	_update_all_items_material_state();
}

void TileMap::set_use_parent_material(bool p_use_parent_material) {

	CanvasItem::set_use_parent_material(p_use_parent_material);
	_update_all_items_material_state();
}

void TileMap::_update_all_items_material_state() {

	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		for (List<RID>::Element *E = q.canvas_items.front(); E; E = E->next()) {

			_update_item_material_state(E->get());
		}
	}
}

void TileMap::_update_item_material_state(const RID &p_canvas_item) {

	VS::get_singleton()->canvas_item_set_use_parent_material(p_canvas_item, get_use_parent_material() || get_material().is_valid());
}

void TileMap::clear() {

	_clear_quadrants();
	tile_map.clear();
	used_size_cache_dirty = true;
}

void TileMap::_set_tile_data(const PoolVector<int> &p_data) {

	int c = p_data.size();
	PoolVector<int>::Read r = p_data.read();

	int offset = (format == FORMAT_2) ? 3 : 2;

	clear();
	for (int i = 0; i < c; i += offset) {

		const uint8_t *ptr = (const uint8_t *)&r[i];
		uint8_t local[12];
		for (int j = 0; j < ((format == FORMAT_2) ? 12 : 8); j++)
			local[j] = ptr[j];

#ifdef BIG_ENDIAN_ENABLED

		SWAP(local[0], local[3]);
		SWAP(local[1], local[2]);
		SWAP(local[4], local[7]);
		SWAP(local[5], local[6]);
		//TODO: ask someone to check this...
		if (FORMAT == FORMAT_2) {
			SWAP(local[8], local[11]);
			SWAP(local[9], local[10]);
		}
#endif

		int16_t x = decode_uint16(&local[0]);
		int16_t y = decode_uint16(&local[2]);
		uint32_t v = decode_uint32(&local[4]);
		bool flip_h = v & (1 << 29);
		bool flip_v = v & (1 << 30);
		bool transpose = v & (1 << 31);
		v &= (1 << 29) - 1;
		int16_t coord_x = 0;
		int16_t coord_y = 0;
		if (format == FORMAT_2) {
			coord_x = decode_uint16(&local[8]);
			coord_y = decode_uint16(&local[10]);
		}
		/*
		if (x<-20 || y <-20 || x>4000 || y>4000)
			continue;
		*/
		set_cell(x, y, v, flip_h, flip_v, transpose, Vector2(coord_x, coord_y));
	}
}

PoolVector<int> TileMap::_get_tile_data() const {

	PoolVector<int> data;
	data.resize(tile_map.size() * 3);
	PoolVector<int>::Write w = data.write();

	format = FORMAT_2;

	int idx = 0;
	for (const Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {
		uint8_t *ptr = (uint8_t *)&w[idx];
		encode_uint16(E->key().x, &ptr[0]);
		encode_uint16(E->key().y, &ptr[2]);
		uint32_t val = E->get().id;
		if (E->get().flip_h)
			val |= (1 << 29);
		if (E->get().flip_v)
			val |= (1 << 30);
		if (E->get().transpose)
			val |= (1 << 31);
		encode_uint32(val, &ptr[4]);
		encode_uint16(E->get().autotile_coord_x, &ptr[8]);
		encode_uint16(E->get().autotile_coord_y, &ptr[10]);
		idx += 3;
	}

	w = PoolVector<int>::Write();

	return data;
}

Rect2 TileMap::_edit_get_rect() const {
	const_cast<TileMap *>(this)->update_dirty_quadrants();
	return rect_cache;
}

void TileMap::set_collision_layer(uint32_t p_layer) {

	collision_layer = p_layer;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Physics2DServer::get_singleton()->body_set_collision_layer(q.body, collision_layer);
	}
}

void TileMap::set_collision_mask(uint32_t p_mask) {

	collision_mask = p_mask;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Physics2DServer::get_singleton()->body_set_collision_mask(q.body, collision_mask);
	}
}

void TileMap::set_collision_layer_bit(int p_bit, bool p_value) {

	uint32_t layer = get_collision_layer();
	if (p_value)
		layer |= 1 << p_bit;
	else
		layer &= ~(1 << p_bit);
	set_collision_layer(layer);
}

void TileMap::set_collision_mask_bit(int p_bit, bool p_value) {

	uint32_t mask = get_collision_mask();
	if (p_value)
		mask |= 1 << p_bit;
	else
		mask &= ~(1 << p_bit);
	set_collision_mask(mask);
}

bool TileMap::get_collision_use_kinematic() const {

	return use_kinematic;
}

void TileMap::set_collision_use_kinematic(bool p_use_kinematic) {

	_clear_quadrants();
	use_kinematic = p_use_kinematic;
	_recreate_quadrants();
}

void TileMap::set_collision_friction(float p_friction) {

	friction = p_friction;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Physics2DServer::get_singleton()->body_set_param(q.body, Physics2DServer::BODY_PARAM_FRICTION, p_friction);
	}
}

float TileMap::get_collision_friction() const {

	return friction;
}

void TileMap::set_collision_bounce(float p_bounce) {

	bounce = p_bounce;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		Quadrant &q = E->get();
		Physics2DServer::get_singleton()->body_set_param(q.body, Physics2DServer::BODY_PARAM_BOUNCE, p_bounce);
	}
}
float TileMap::get_collision_bounce() const {

	return bounce;
}

uint32_t TileMap::get_collision_layer() const {

	return collision_layer;
}

uint32_t TileMap::get_collision_mask() const {

	return collision_mask;
}

bool TileMap::get_collision_layer_bit(int p_bit) const {

	return get_collision_layer() & (1 << p_bit);
}

bool TileMap::get_collision_mask_bit(int p_bit) const {

	return get_collision_mask() & (1 << p_bit);
}

void TileMap::set_mode(Mode p_mode) {

	_clear_quadrants();
	mode = p_mode;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

TileMap::Mode TileMap::get_mode() const {
	return mode;
}

void TileMap::set_half_offset(HalfOffset p_half_offset) {

	_clear_quadrants();
	half_offset = p_half_offset;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

void TileMap::set_tile_origin(TileOrigin p_tile_origin) {

	_clear_quadrants();
	tile_origin = p_tile_origin;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

TileMap::TileOrigin TileMap::get_tile_origin() const {

	return tile_origin;
}

Vector2 TileMap::get_cell_draw_offset() const {

	switch (mode) {

		case MODE_SQUARE: {

			return Vector2();
		} break;
		case MODE_ISOMETRIC: {

			return Vector2(-cell_size.x * 0.5, 0);

		} break;
		case MODE_CUSTOM: {

			Vector2 min;
			min.x = MIN(custom_transform[0].x, min.x);
			min.y = MIN(custom_transform[0].y, min.y);
			min.x = MIN(custom_transform[1].x, min.x);
			min.y = MIN(custom_transform[1].y, min.y);
			return min;
		} break;
	}

	return Vector2();
}

TileMap::HalfOffset TileMap::get_half_offset() const {
	return half_offset;
}

Transform2D TileMap::get_cell_transform() const {

	switch (mode) {

		case MODE_SQUARE: {

			Transform2D m;
			m[0] *= cell_size.x;
			m[1] *= cell_size.y;
			return m;
		} break;
		case MODE_ISOMETRIC: {

			//isometric only makes sense when y is positive in both x and y vectors, otherwise
			//the drawing of tiles will overlap
			Transform2D m;
			m[0] = Vector2(cell_size.x * 0.5, cell_size.y * 0.5);
			m[1] = Vector2(-cell_size.x * 0.5, cell_size.y * 0.5);
			return m;

		} break;
		case MODE_CUSTOM: {

			return custom_transform;
		} break;
	}

	return Transform2D();
}

void TileMap::set_custom_transform(const Transform2D &p_xform) {

	_clear_quadrants();
	custom_transform = p_xform;
	_recreate_quadrants();
	emit_signal("settings_changed");
}

Transform2D TileMap::get_custom_transform() const {

	return custom_transform;
}

Vector2 TileMap::_map_to_world(int p_x, int p_y, bool p_ignore_ofs) const {

	Vector2 ret = get_cell_transform().xform(Vector2(p_x, p_y));
	if (!p_ignore_ofs) {
		switch (half_offset) {

			case HALF_OFFSET_X: {
				if (ABS(p_y) & 1) {

					ret += get_cell_transform()[0] * 0.5;
				}
			} break;
			case HALF_OFFSET_Y: {
				if (ABS(p_x) & 1) {
					ret += get_cell_transform()[1] * 0.5;
				}
			} break;
			default: {}
		}
	}
	return ret;
}

bool TileMap::_set(const StringName &p_name, const Variant &p_value) {

	if (p_name == "format") {
		if (p_value.get_type() == Variant::INT) {
			format = (DataFormat)(p_value.operator int64_t());
			return true;
		}
	} else if (p_name == "tile_data") {
		if (p_value.is_array()) {
			_set_tile_data(p_value);
			return true;
		}
		return false;
	}
	return false;
}

bool TileMap::_get(const StringName &p_name, Variant &r_ret) const {

	if (p_name == "format") {
		r_ret = FORMAT_2;
		return true;
	} else if (p_name == "tile_data") {
		r_ret = _get_tile_data();
		return true;
	}
	return false;
}

void TileMap::_get_property_list(List<PropertyInfo> *p_list) const {

	PropertyInfo p(Variant::INT, "format", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL);
	p_list->push_back(p);

	p = PropertyInfo(Variant::OBJECT, "tile_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL);
	p_list->push_back(p);
}

Vector2 TileMap::map_to_world(const Vector2 &p_pos, bool p_ignore_ofs) const {

	return _map_to_world(p_pos.x, p_pos.y, p_ignore_ofs);
}

Vector2 TileMap::world_to_map(const Vector2 &p_pos) const {

	Vector2 ret = get_cell_transform().affine_inverse().xform(p_pos);

	switch (half_offset) {

		case HALF_OFFSET_X: {
			if (ret.y > 0 ? int(ret.y) & 1 : (int(ret.y) - 1) & 1) {
				ret.x -= 0.5;
			}
		} break;
		case HALF_OFFSET_Y: {
			if (ret.x > 0 ? int(ret.x) & 1 : (int(ret.x) - 1) & 1) {
				ret.y -= 0.5;
			}
		} break;
		default: {}
	}

	return ret.floor();
}

void TileMap::set_y_sort_mode(bool p_enable) {

	_clear_quadrants();
	y_sort_mode = p_enable;
	VS::get_singleton()->canvas_item_set_sort_children_by_y(get_canvas_item(), y_sort_mode);
	_recreate_quadrants();
	emit_signal("settings_changed");
}

bool TileMap::is_y_sort_mode_enabled() const {

	return y_sort_mode;
}

Array TileMap::get_used_cells() const {

	Array a;
	a.resize(tile_map.size());
	int i = 0;
	for (Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {

		Vector2 p(E->key().x, E->key().y);
		a[i++] = p;
	}

	return a;
}

Array TileMap::get_used_cells_by_id(int p_id) const {

	Array a;
	for (Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {

		if (E->value().id == p_id) {
			Vector2 p(E->key().x, E->key().y);
			a.push_back(p);
		}
	}

	return a;
}

Rect2 TileMap::get_used_rect() { // Not const because of cache

	if (used_size_cache_dirty) {
		if (tile_map.size() > 0) {
			used_size_cache = Rect2(tile_map.front()->key().x, tile_map.front()->key().y, 0, 0);

			for (Map<PosKey, Cell>::Element *E = tile_map.front(); E; E = E->next()) {
				used_size_cache.expand_to(Vector2(E->key().x, E->key().y));
			}

			used_size_cache.size += Vector2(1, 1);
		} else {
			used_size_cache = Rect2();
		}

		used_size_cache_dirty = false;
	}

	return used_size_cache;
}

void TileMap::set_occluder_light_mask(int p_mask) {

	occluder_light_mask = p_mask;
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		for (Map<PosKey, Quadrant::Occluder>::Element *F = E->get().occluder_instances.front(); F; F = F->next()) {
			VisualServer::get_singleton()->canvas_light_occluder_set_light_mask(F->get().id, occluder_light_mask);
		}
	}
}

int TileMap::get_occluder_light_mask() const {

	return occluder_light_mask;
}

void TileMap::set_light_mask(int p_light_mask) {

	CanvasItem::set_light_mask(p_light_mask);
	for (Map<PosKey, Quadrant>::Element *E = quadrant_map.front(); E; E = E->next()) {

		for (List<RID>::Element *F = E->get().canvas_items.front(); F; F = F->next()) {
			VisualServer::get_singleton()->canvas_item_set_light_mask(F->get(), get_light_mask());
		}
	}
}

void TileMap::set_clip_uv(bool p_enable) {

	if (clip_uv == p_enable)
		return;

	_clear_quadrants();
	clip_uv = p_enable;
	_recreate_quadrants();
}

bool TileMap::get_clip_uv() const {

	return clip_uv;
}

void TileMap::_bind_methods() {

	ClassDB::bind_method(D_METHOD("set_tileset", "tileset"), &TileMap::set_tileset);
	ClassDB::bind_method(D_METHOD("get_tileset"), &TileMap::get_tileset);

	ClassDB::bind_method(D_METHOD("set_mode", "mode"), &TileMap::set_mode);
	ClassDB::bind_method(D_METHOD("get_mode"), &TileMap::get_mode);

	ClassDB::bind_method(D_METHOD("set_half_offset", "half_offset"), &TileMap::set_half_offset);
	ClassDB::bind_method(D_METHOD("get_half_offset"), &TileMap::get_half_offset);

	ClassDB::bind_method(D_METHOD("set_custom_transform", "custom_transform"), &TileMap::set_custom_transform);
	ClassDB::bind_method(D_METHOD("get_custom_transform"), &TileMap::get_custom_transform);

	ClassDB::bind_method(D_METHOD("set_cell_size", "size"), &TileMap::set_cell_size);
	ClassDB::bind_method(D_METHOD("get_cell_size"), &TileMap::get_cell_size);

	ClassDB::bind_method(D_METHOD("_set_old_cell_size", "size"), &TileMap::_set_old_cell_size);
	ClassDB::bind_method(D_METHOD("_get_old_cell_size"), &TileMap::_get_old_cell_size);

	ClassDB::bind_method(D_METHOD("set_quadrant_size", "size"), &TileMap::set_quadrant_size);
	ClassDB::bind_method(D_METHOD("get_quadrant_size"), &TileMap::get_quadrant_size);

	ClassDB::bind_method(D_METHOD("set_tile_origin", "origin"), &TileMap::set_tile_origin);
	ClassDB::bind_method(D_METHOD("get_tile_origin"), &TileMap::get_tile_origin);

	ClassDB::bind_method(D_METHOD("set_clip_uv", "enable"), &TileMap::set_clip_uv);
	ClassDB::bind_method(D_METHOD("get_clip_uv"), &TileMap::get_clip_uv);

	ClassDB::bind_method(D_METHOD("set_y_sort_mode", "enable"), &TileMap::set_y_sort_mode);
	ClassDB::bind_method(D_METHOD("is_y_sort_mode_enabled"), &TileMap::is_y_sort_mode_enabled);

	ClassDB::bind_method(D_METHOD("set_collision_use_kinematic", "use_kinematic"), &TileMap::set_collision_use_kinematic);
	ClassDB::bind_method(D_METHOD("get_collision_use_kinematic"), &TileMap::get_collision_use_kinematic);

	ClassDB::bind_method(D_METHOD("set_collision_layer", "layer"), &TileMap::set_collision_layer);
	ClassDB::bind_method(D_METHOD("get_collision_layer"), &TileMap::get_collision_layer);

	ClassDB::bind_method(D_METHOD("set_collision_mask", "mask"), &TileMap::set_collision_mask);
	ClassDB::bind_method(D_METHOD("get_collision_mask"), &TileMap::get_collision_mask);

	ClassDB::bind_method(D_METHOD("set_collision_layer_bit", "bit", "value"), &TileMap::set_collision_layer_bit);
	ClassDB::bind_method(D_METHOD("get_collision_layer_bit", "bit"), &TileMap::get_collision_layer_bit);

	ClassDB::bind_method(D_METHOD("set_collision_mask_bit", "bit", "value"), &TileMap::set_collision_mask_bit);
	ClassDB::bind_method(D_METHOD("get_collision_mask_bit", "bit"), &TileMap::get_collision_mask_bit);

	ClassDB::bind_method(D_METHOD("set_collision_friction", "value"), &TileMap::set_collision_friction);
	ClassDB::bind_method(D_METHOD("get_collision_friction"), &TileMap::get_collision_friction);

	ClassDB::bind_method(D_METHOD("set_collision_bounce", "value"), &TileMap::set_collision_bounce);
	ClassDB::bind_method(D_METHOD("get_collision_bounce"), &TileMap::get_collision_bounce);

	ClassDB::bind_method(D_METHOD("set_occluder_light_mask", "mask"), &TileMap::set_occluder_light_mask);
	ClassDB::bind_method(D_METHOD("get_occluder_light_mask"), &TileMap::get_occluder_light_mask);

	ClassDB::bind_method(D_METHOD("set_cell", "x", "y", "tile", "flip_x", "flip_y", "transpose", "autotile_coord"), &TileMap::set_cell, DEFVAL(false), DEFVAL(false), DEFVAL(false), DEFVAL(Vector2()));
	ClassDB::bind_method(D_METHOD("set_cellv", "position", "tile", "flip_x", "flip_y", "transpose"), &TileMap::set_cellv, DEFVAL(false), DEFVAL(false), DEFVAL(false));
	ClassDB::bind_method(D_METHOD("_set_celld", "position", "data"), &TileMap::_set_celld);
	ClassDB::bind_method(D_METHOD("get_cell", "x", "y"), &TileMap::get_cell);
	ClassDB::bind_method(D_METHOD("get_cellv", "position"), &TileMap::get_cellv);
	ClassDB::bind_method(D_METHOD("is_cell_x_flipped", "x", "y"), &TileMap::is_cell_x_flipped);
	ClassDB::bind_method(D_METHOD("is_cell_y_flipped", "x", "y"), &TileMap::is_cell_y_flipped);
	ClassDB::bind_method(D_METHOD("is_cell_transposed", "x", "y"), &TileMap::is_cell_transposed);

	ClassDB::bind_method(D_METHOD("fix_invalid_tiles"), &TileMap::fix_invalid_tiles);
	ClassDB::bind_method(D_METHOD("clear"), &TileMap::clear);

	ClassDB::bind_method(D_METHOD("get_used_cells"), &TileMap::get_used_cells);
	ClassDB::bind_method(D_METHOD("get_used_cells_by_id", "id"), &TileMap::get_used_cells_by_id);
	ClassDB::bind_method(D_METHOD("get_used_rect"), &TileMap::get_used_rect);

	ClassDB::bind_method(D_METHOD("map_to_world", "map_position", "ignore_half_ofs"), &TileMap::map_to_world, DEFVAL(false));
	ClassDB::bind_method(D_METHOD("world_to_map", "world_position"), &TileMap::world_to_map);

	ClassDB::bind_method(D_METHOD("_clear_quadrants"), &TileMap::_clear_quadrants);
	ClassDB::bind_method(D_METHOD("_recreate_quadrants"), &TileMap::_recreate_quadrants);
	ClassDB::bind_method(D_METHOD("update_dirty_quadrants"), &TileMap::update_dirty_quadrants);

	ClassDB::bind_method(D_METHOD("update_bitmask_area", "position"), &TileMap::update_bitmask_area);
	ClassDB::bind_method(D_METHOD("update_bitmask_region", "start", "end"), &TileMap::update_bitmask_region, DEFVAL(Vector2()), DEFVAL(Vector2()));

	ClassDB::bind_method(D_METHOD("_set_tile_data"), &TileMap::_set_tile_data);
	ClassDB::bind_method(D_METHOD("_get_tile_data"), &TileMap::_get_tile_data);

	ADD_PROPERTY(PropertyInfo(Variant::INT, "mode", PROPERTY_HINT_ENUM, "Square,Isometric,Custom"), "set_mode", "get_mode");
	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "tile_set", PROPERTY_HINT_RESOURCE_TYPE, "TileSet"), "set_tileset", "get_tileset");

	ADD_GROUP("Cell", "cell_");
	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "cell_size", PROPERTY_HINT_RANGE, "1,8192,1"), "set_cell_size", "get_cell_size");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "cell_quadrant_size", PROPERTY_HINT_RANGE, "1,128,1"), "set_quadrant_size", "get_quadrant_size");
	ADD_PROPERTY(PropertyInfo(Variant::TRANSFORM2D, "cell_custom_transform"), "set_custom_transform", "get_custom_transform");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "cell_half_offset", PROPERTY_HINT_ENUM, "Offset X,Offset Y,Disabled"), "set_half_offset", "get_half_offset");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "cell_tile_origin", PROPERTY_HINT_ENUM, "Top Left,Center,Bottom Left"), "set_tile_origin", "get_tile_origin");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "cell_y_sort"), "set_y_sort_mode", "is_y_sort_mode_enabled");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "cell_clip_uv"), "set_clip_uv", "get_clip_uv");

	ADD_GROUP("Collision", "collision_");
	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "collision_use_kinematic", PROPERTY_HINT_NONE, ""), "set_collision_use_kinematic", "get_collision_use_kinematic");
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "collision_friction", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_collision_friction", "get_collision_friction");
	ADD_PROPERTY(PropertyInfo(Variant::REAL, "collision_bounce", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_collision_bounce", "get_collision_bounce");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "collision_layer", PROPERTY_HINT_LAYERS_2D_PHYSICS), "set_collision_layer", "get_collision_layer");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "collision_mask", PROPERTY_HINT_LAYERS_2D_PHYSICS), "set_collision_mask", "get_collision_mask");

	ADD_GROUP("Occluder", "occluder_");
	ADD_PROPERTY(PropertyInfo(Variant::INT, "occluder_light_mask", PROPERTY_HINT_LAYERS_2D_RENDER), "set_occluder_light_mask", "get_occluder_light_mask");

	ADD_SIGNAL(MethodInfo("settings_changed"));

	BIND_CONSTANT(INVALID_CELL);

	BIND_ENUM_CONSTANT(MODE_SQUARE);
	BIND_ENUM_CONSTANT(MODE_ISOMETRIC);
	BIND_ENUM_CONSTANT(MODE_CUSTOM);

	BIND_ENUM_CONSTANT(HALF_OFFSET_X);
	BIND_ENUM_CONSTANT(HALF_OFFSET_Y);
	BIND_ENUM_CONSTANT(HALF_OFFSET_DISABLED);

	BIND_ENUM_CONSTANT(TILE_ORIGIN_TOP_LEFT);
	BIND_ENUM_CONSTANT(TILE_ORIGIN_CENTER);
	BIND_ENUM_CONSTANT(TILE_ORIGIN_BOTTOM_LEFT);
}

void TileMap::_changed_callback(Object *p_changed, const char *p_prop) {
	if (tile_set.is_valid() && tile_set.ptr() == p_changed) {
		emit_signal("settings_changed");
	}
}

TileMap::TileMap() {

	rect_cache_dirty = true;
	used_size_cache_dirty = true;
	pending_update = false;
	quadrant_order_dirty = false;
	quadrant_size = 16;
	cell_size = Size2(64, 64);
	collision_layer = 1;
	collision_mask = 1;
	friction = 1;
	bounce = 0;
	mode = MODE_SQUARE;
	half_offset = HALF_OFFSET_DISABLED;
	use_kinematic = false;
	navigation = NULL;
	y_sort_mode = false;
	occluder_light_mask = 1;
	clip_uv = false;
	format = FORMAT_1; //Always initialize with the lowest format

	fp_adjust = 0.00001;
	tile_origin = TILE_ORIGIN_TOP_LEFT;
	set_notify_transform(true);
}

TileMap::~TileMap() {

	if (tile_set.is_valid())
		tile_set->remove_change_receptor(this);

	clear();
}