Added Box2D

external/Box2D-2.3.1/Contributions/Enhancements/Controllers/b2ConstantAccelController.h

@@ -0,0 +1,54 @@
+/*
+* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com
+*
+* 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 B2_CONSTANTACCELCONTROLLER_H
+#define B2_CONSTANTACCELCONTROLLER_H
+
+#include "b2Controller.h"
+
+class b2ConstantAccelControllerDef;
+
+/// Applies a force every frame
+class b2ConstantAccelController : public b2Controller{
+public:
+	/// The force to apply
+	b2Vec2 A;
+
+	/// @see b2Controller::Step
+	void Step(const b2TimeStep& step);
+
+protected:
+	void Destroy(b2BlockAllocator* allocator);
+
+private:
+	friend class b2ConstantAccelControllerDef;
+	b2ConstantAccelController(const b2ConstantAccelControllerDef* def);
+
+};
+
+/// This class is used to build constant acceleration controllers
+class b2ConstantAccelControllerDef : public b2ControllerDef
+{
+public:
+	/// The force to apply
+	b2Vec2 A;
+private:
+	b2ConstantAccelController* Create(b2BlockAllocator* allocator) const;
+};
+
+#endif