Add EdgeShape:getPoints()

--HG--
branch : box2d-update

src/modules/physics/box2d/EdgeShape.cpp

@@ -23,6 +23,7 @@
 // Module
 #include "Body.h"
 #include "World.h"
+#include "Physics.h"
 
 #include <common/Memoizer.h>
 
@@ -43,6 +44,19 @@ namespace box2d
 		delete shape;
 		shape = NULL;
 	}
+	
+	int EdgeShape::getPoints(lua_State * L)
+	{
+		b2EdgeShape * e = (b2EdgeShape *)shape;
+		b2Vec2 v1 = Physics::scaleUp(e->m_vertex1);
+		b2Vec2 v2 = Physics::scaleUp(e->m_vertex2);
+		lua_pushnumber(L, v1.x);
+		lua_pushnumber(L, v1.y);
+		lua_pushnumber(L, v2.x);
+		lua_pushnumber(L, v2.y);
+		return 4;
+		
+	}
 
 } // box2d
 } // physics

src/modules/physics/box2d/EdgeShape.h

@@ -45,6 +45,14 @@ namespace box2d
 		EdgeShape(b2EdgeShape * e);
 
 		virtual ~EdgeShape();
+
+		/**
+		* Returns the transformed points of the edge shape.
+		* This function is useful for debug drawing and such.
+		*
+		* The result can be directly passed into love.graphics.line().
+		**/
+		int getPoints(lua_State * L);
 	};
 
 } // box2d

src/modules/physics/box2d/wrap_EdgeShape.cpp

@@ -30,8 +30,16 @@ namespace box2d
 	{
 		return luax_checktype<EdgeShape>(L, idx, "EdgeShape", PHYSICS_EDGE_SHAPE_T);
 	}
+	
+	int w_EdgeShape_getPoints(lua_State * L)
+	{
+		EdgeShape * t = luax_checkedgeshape(L, 1);
+		lua_remove(L, 1);
+		return t->getPoints(L);
+	}
 
 	static const luaL_Reg functions[] = {
+		{ "getPoints", w_EdgeShape_getPoints },
 		// From Shape.
 		{ "getType", w_Shape_getType },
 		{ "getRadius", w_Shape_getRadius },

src/modules/physics/box2d/wrap_EdgeShape.h

@@ -33,6 +33,7 @@ namespace physics
 namespace box2d
 {
 	EdgeShape * luax_checkedgeshape(lua_State * L, int idx);
+	int w_EdgeShape_getPoints(lua_State * L);
 	int luaopen_edgeshape(lua_State * L);
 
 } // box2d