Initial Mercurial commit.

src/modules/physics/box2d/Contact.h

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+/**
+* Copyright (c) 2006-2009 LOVE Development Team
+* 
+* This software is provided 'as-is', without any express or implied
+* warranty.  In no event will the authors be held liable for any damages
+* arising from the use of this software.
+* 
+* Permission is granted to anyone to use this software for any purpose,
+* including commercial applications, and to alter it and redistribute it
+* freely, subject to the following restrictions:
+* 
+* 1. The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software
+*    in a product, an acknowledgment in the product documentation would be
+*    appreciated but is not required.
+* 2. Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+* 3. This notice may not be removed or altered from any source distribution.
+**/
+
+#ifndef LOVE_PHYSICS_BOX2D_CONTACT_H
+#define LOVE_PHYSICS_BOX2D_CONTACT_H
+
+// LOVE
+#include <common/Object.h>
+#include <common/runtime.h>
+
+// Box2D
+#include "Include/Box2D.h"
+
+namespace love
+{
+namespace physics
+{
+namespace box2d
+{
+	class World;
+
+	/**
+	* A Contact represents a collision point between
+	* two shapes.
+	**/
+	class Contact : public Object
+	{
+		// Friends.
+		friend class World;
+
+	private:
+
+		// The Box2D contact point.
+		b2ContactPoint point;
+
+		// The parent world. Needed for scaling.
+		World * world;
+
+	public:
+
+		/**
+		* Creates a new Contact by copying a Box2D contact
+		* point. It does not store the pointer, but copy the
+		* data pointed to.
+		* @param point Pointer to the Box2D contact.
+		**/
+		Contact(World * world, const b2ContactPoint * point);
+
+		~Contact();
+
+		/**
+		* Gets the position of the Contact.
+		* @return The position along the x-axis.
+		* @return The position along the y-axis.
+		**/
+		int getPosition(lua_State * L);
+
+		/**
+		* Gets the linear impact velocity.
+		* @return The velocity along the x-axis.
+		* @return The velocity along the y-axis.
+		**/
+		int getVelocity(lua_State * L);
+
+		/**
+		* Gets the collision normal.
+		* @return The x-component of the normal.
+		* @return The y-component of the normal.
+		**/
+		int getNormal(lua_State * L);
+
+		/**
+		* How far apart the shapes are. If they are intersecting
+		* this value is negative.
+		**/
+		float getSeparation() const;
+
+		/**
+		* The mixed friction between the two shapes at
+		* the point of impact.
+		**/
+		float getFriction() const;
+
+		/**
+		* The mixed restitution of the two shapes
+		* at the point of impact.
+		**/
+		float getRestitution() const;
+
+	};
+
+} // box2d
+} // physics
+} // love
+
+#endif // LOVE_PHYSICS_BOX2D_CONTACT_H