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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  

#ifdef RENDER_SNIPPET

#include <vector>

#include "PxPhysicsAPI.h"

#include "../SnippetRender/SnippetRender.h"
#include "../SnippetRender/SnippetCamera.h"

using namespace physx;

extern void initPhysics(bool interactive);
extern void stepPhysics(bool interactive);	
extern void renderPhysics();
extern void cleanupPhysics(bool interactive);
extern void keyPress(unsigned char key, const PxTransform& camera);

extern PxScene* gScene;

Snippets::Camera*	sCamera;

void motionCallback(int x, int y)
{
	sCamera->handleMotion(x, y);
}

void keyboardCallback(unsigned char key, int x, int y)
{
	if(key==27)
		exit(0);

	if(!sCamera->handleKey(key, x, y))
		keyPress(key, sCamera->getTransform());
}

void mouseCallback(int button, int state, int x, int y)
{
	sCamera->handleMouse(button, state, x, y);
}

void idleCallback()
{
	glutPostRedisplay();
}

void renderScene(physx::PxScene * scene, physx::PxRigidActor * referenceFrame, const physx::PxVec3 & color)
{
	PxU32 nbActors = scene->getNbActors(PxActorTypeFlag::eRIGID_DYNAMIC | PxActorTypeFlag::eRIGID_STATIC);
	if(nbActors)
	{
		std::vector<PxRigidActor*> actors(nbActors);
		scene->getActors(PxActorTypeFlag::eRIGID_DYNAMIC | PxActorTypeFlag::eRIGID_STATIC, reinterpret_cast<PxActor**>(&actors[0]), nbActors);

		glPushMatrix();					
		if (referenceFrame)
		{
			const PxMat44 actorPose( referenceFrame->getGlobalPose());
			glMultMatrixf(reinterpret_cast<const float*>(&actorPose));
		}

		Snippets::renderActors(&actors[0], static_cast<PxU32>(actors.size()), referenceFrame == NULL, color);

		glPopMatrix();
	}

}

void renderCallback()
{
	stepPhysics(true);

	Snippets::startRender(sCamera->getEye(), sCamera->getDir());

	renderPhysics();

	Snippets::finishRender();
}

void exitCallback(void)
{
	delete sCamera;
	cleanupPhysics(true);
}

void renderLoop()
{
	sCamera = new Snippets::Camera(PxVec3(10.0f, 10.0f, 10.0f), PxVec3(-0.6f,-0.2f,-0.7f));

	Snippets::setupDefaultWindow("PhysX Snippet Nested Scene");
	Snippets::setupDefaultRenderState();

	glutIdleFunc(idleCallback);
	glutDisplayFunc(renderCallback);
	glutKeyboardFunc(keyboardCallback);
	glutMouseFunc(mouseCallback);
	glutMotionFunc(motionCallback);
	motionCallback(0,0);

	atexit(exitCallback);

	initPhysics(true);
	glutMainLoop();
}

#endif