1 files changed, 187 insertions, 0 deletions

diff --git a/scene/2d/collision_polygon_2d.cpp b/scene/2d/collision_polygon_2d.cpp
new file mode 100644
index 000000000..5ab223a1b
--- /dev/null
+++ b/scene/2d/collision_polygon_2d.cpp
@@ -0,0 +1,187 @@
+/*************************************************************************/
+/*  collision_polygon_2d.cpp                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* 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 "collision_polygon_2d.h"
+#include "collision_object_2d.h"
+#include "scene/resources/concave_polygon_shape_2d.h"
+#include "scene/resources/convex_polygon_shape_2d.h"
+
+void CollisionPolygon2D::_add_to_collision_object(Object *p_obj) {
+
+	CollisionObject2D *co = p_obj->cast_to<CollisionObject2D>();
+	ERR_FAIL_COND(!co);
+
+	if (polygon.size()==0)
+		return;
+
+	bool solids=build_mode==BUILD_SOLIDS;
+
+
+	if (solids) {
+
+		//here comes the sun, lalalala
+		//decompose concave into multiple convex polygons and add them
+		Vector< Vector<Vector2> > decomp = Geometry::decompose_polygon(polygon);
+		for(int i=0;i<decomp.size();i++) {
+			Ref<ConvexPolygonShape2D> convex = memnew( ConvexPolygonShape2D );
+			convex->set_points(decomp[i]);
+			co->add_shape(convex,get_transform());
+
+		}
+
+	} else {
+
+		Ref<ConcavePolygonShape2D> concave = memnew( ConcavePolygonShape2D );
+
+		DVector<Vector2> segments;
+		segments.resize(polygon.size()*2);
+		DVector<Vector2>::Write w=segments.write();
+
+		for(int i=0;i<polygon.size();i++) {
+			w[(i<<1)+0]=polygon[i];
+			w[(i<<1)+1]=polygon[(i+1)%polygon.size()];
+		}
+
+		w=DVector<Vector2>::Write();
+		concave->set_segments(segments);
+
+		co->add_shape(concave,get_transform());
+
+	}
+
+
+	//co->add_shape(shape,get_transform());
+}
+
+void CollisionPolygon2D::_update_parent() {
+
+	Node *parent = get_parent();
+	if (!parent)
+		return;
+	CollisionObject2D *co = parent->cast_to<CollisionObject2D>();
+	if (!co)
+		return;
+	co->_update_shapes_from_children();
+}
+
+void CollisionPolygon2D::_notification(int p_what) {
+
+
+	switch(p_what) {
+		case NOTIFICATION_LOCAL_TRANSFORM_CHANGED: {
+
+			if (!is_inside_scene())
+				break;
+			_update_parent();
+
+		} break;
+
+		case NOTIFICATION_DRAW: {
+			for(int i=0;i<polygon.size();i++) {
+
+				Vector2 p = polygon[i];
+				Vector2 n = polygon[(i+1)%polygon.size()];
+				draw_line(p,n,Color(0,0.6,0.7,0.5),3);
+			}
+
+			Vector< Vector<Vector2> > decomp = Geometry::decompose_polygon(polygon);
+#define DEBUG_DECOMPOSE
+#ifdef DEBUG_DECOMPOSE
+			Color c(0.4,0.9,0.1);
+			for(int i=0;i<decomp.size();i++) {
+
+				c.set_hsv( Math::fmod(c.get_h() + 0.738,1),c.get_s(),c.get_v(),0.5);
+				draw_colored_polygon(decomp[i],c);
+			}
+#endif
+		} break;
+	}
+}
+
+void CollisionPolygon2D::set_polygon(const Vector<Point2>& p_polygon) {
+
+	polygon=p_polygon;
+
+	for(int i=0;i<polygon.size();i++) {
+		if (i==0)
+			aabb=Rect2(polygon[i],Size2());
+		else
+			aabb.expand_to(polygon[i]);
+	}
+	if (aabb==Rect2()) {
+
+		aabb=Rect2(-10,-10,20,20);
+	} else {
+		aabb.pos-=aabb.size*0.3;
+		aabb.size+=aabb.size*0.6;
+	}
+	_update_parent();
+	update();
+}
+
+Vector<Point2> CollisionPolygon2D::get_polygon() const {
+
+	return polygon;
+}
+
+void CollisionPolygon2D::set_build_mode(BuildMode p_mode) {
+
+	ERR_FAIL_INDEX(p_mode,2);
+	build_mode=p_mode;
+}
+
+CollisionPolygon2D::BuildMode CollisionPolygon2D::get_build_mode() const{
+
+	return build_mode;
+}
+
+Rect2 CollisionPolygon2D::get_item_rect() const {
+
+	return aabb;
+}
+
+void CollisionPolygon2D::_bind_methods() {
+
+	ObjectTypeDB::bind_method(_MD("_add_to_collision_object"),&CollisionPolygon2D::_add_to_collision_object);
+	ObjectTypeDB::bind_method(_MD("set_polygon","polygon"),&CollisionPolygon2D::set_polygon);
+	ObjectTypeDB::bind_method(_MD("get_polygon"),&CollisionPolygon2D::get_polygon);
+
+	ObjectTypeDB::bind_method(_MD("set_build_mode"),&CollisionPolygon2D::set_build_mode);
+	ObjectTypeDB::bind_method(_MD("get_build_mode"),&CollisionPolygon2D::get_build_mode);
+
+	ADD_PROPERTY( PropertyInfo(Variant::INT,"build_mode",PROPERTY_HINT_ENUM,"Automatic,Segments,Solids"),_SCS("set_build_mode"),_SCS("get_build_mode"));
+	ADD_PROPERTY( PropertyInfo(Variant::VECTOR2_ARRAY,"polygon"),_SCS("set_polygon"),_SCS("get_polygon"));
+}
+
+CollisionPolygon2D::CollisionPolygon2D() {
+
+	aabb=Rect2(-10,-10,20,20);
+	build_mode=BUILD_SOLIDS;
+
+
+}