bullet3/Demos3/donttouch/GpuDemo.h

/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/

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 GPU_DEMO_H
#define GPU_DEMO_H


#include "Bullet3Common/b3AlignedObjectArray.h"


class b3BroadphaseInterface;
class b3CollisionShape;
class b3OverlappingPairCache;
class b3CollisionDispatcher;
class b3ConstraintSolver;
struct b3CollisionAlgorithmCreateFunc;
class b3DefaultCollisionConfiguration;
class b3DynamicsWorld;
class GLInstancingRenderer;

///GpuDemo is good starting point for learning the code base and porting.



class GpuDemo
{

protected:

	b3DynamicsWorld*	m_dynamicsWorld;

	//keep the collision shapes, for deletion/cleanup
	b3AlignedObjectArray<b3CollisionShape*>	m_collisionShapes;

	float getDeltaTimeInSeconds()
	{
		return 1./60.f;
	}
public:

	typedef class GpuDemo* (CreateFunc)();

	struct ConstructionInfo
	{
		bool useOpenCL;
		int preferredOpenCLPlatformIndex;
		int preferredOpenCLDeviceIndex;
		int arraySizeX;
		int arraySizeY;
		int arraySizeZ;
		bool m_useConcaveMesh;
		float gapX;
		float gapY;
		float gapZ;
		GLInstancingRenderer*	m_instancingRenderer;
		ConstructionInfo()
			:useOpenCL(false),//true),
			preferredOpenCLPlatformIndex(-1),
			preferredOpenCLDeviceIndex(-1),
			arraySizeX(10),
			arraySizeY(10 ),
			arraySizeZ(10),
			m_useConcaveMesh(false),
			gapX(4.3),
			gapY(4.0),
			gapZ(4.3),
			m_instancingRenderer(0)
		{
		}
	};

protected:
		virtual void setupScene(const ConstructionInfo& ci)=0;
public:

	GpuDemo()
	{
		m_dynamicsWorld=0;
	
	}
	virtual ~GpuDemo()
	{
		exitPhysics();
	}
	virtual void	initPhysics(const ConstructionInfo& ci);

	virtual const char* getName()=0;

	virtual void	exitPhysics();

	virtual const b3DynamicsWorld* getDynamicsWorld() const
	{
		return m_dynamicsWorld;
	}

	virtual void renderScene()
	{

	}

	virtual void clientMoveAndDisplay();

	
	//virtual void	clientResetScene();
	
	

	
};

class GpuCompoundDemo : public GpuDemo
{
public:
	virtual void setupScene(const ConstructionInfo& ci);
	virtual const char* getName()
	{
		return "GpuCompoundDemo";
	}
	static GpuDemo* CreateFunc()
	{
		GpuDemo* demo = new GpuCompoundDemo;
		return demo;
	}
};

class GpuBoxDemo : public GpuDemo
{
public:
	virtual void setupScene(const ConstructionInfo& ci);
	virtual const char* getName()
	{
		return "GpuBoxDemo";
	}
	static GpuDemo* CreateFunc()
	{
		GpuDemo* demo = new GpuBoxDemo;
		return demo;
	}
};

class EmptyDemo : public GpuDemo
{
public:
	virtual void setupScene(const ConstructionInfo& ci);
	virtual const char* getName()
	{
		return "EmptyDemo";
	}
	static GpuDemo* CreateFunc()
	{
		GpuDemo* demo = new EmptyDemo;
		return demo;
	}
	
};

class SpheresDemo : public GpuDemo
{
public:
	virtual void setupScene(const ConstructionInfo& ci);
	virtual const char* getName()
	{
		return "SpheresDemo";
	}
	static GpuDemo* CreateFunc()
	{
		GpuDemo* demo = new SpheresDemo;
		return demo;
	}
	
};

#endif //GPU_DEMO_H