Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 164 insertions, 0 deletions

diff --git a/PhysX_3.4/Samples/SampleVehicle/SampleVehicle_CameraController.cpp b/PhysX_3.4/Samples/SampleVehicle/SampleVehicle_CameraController.cpp
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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2016 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.  
+
+#include "SampleVehicle_CameraController.h"
+#include "PhysXSampleApplication.h"
+#include "PxRigidDynamic.h"
+#include "PxQueryFiltering.h"
+#include "PxScene.h"
+#include "PxSceneLock.h"
+#include "vehicle/PxVehicleWheels.h"
+
+using namespace SampleRenderer;
+using namespace SampleFramework;
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+
+SampleVehicle_CameraController::SampleVehicle_CameraController()
+:	mRotateInputY				(0.0f),
+	mRotateInputZ				(0.0f),
+	mMaxCameraRotateSpeed		(5.0f),
+	mCameraRotateAngleY			(0.0f),
+	mCameraRotateAngleZ			(0.33f),
+	mCameraPos					(PxVec3(0,0,0)),
+	mCameraTargetPos			(PxVec3(0,0,0)),
+	mLastCarPos					(PxVec3(0,0,0)),
+	mLastCarVelocity			(PxVec3(0,0,0)),
+	mCameraInit					(false),
+	mLockOnFocusVehTransform	(true),
+	mLastFocusVehTransform		(PxTransform(PxIdentity))
+{
+}
+
+SampleVehicle_CameraController::~SampleVehicle_CameraController()
+{
+}
+
+static void dampVec3(const PxVec3& oldPosition, PxVec3& newPosition, PxF32 timestep)
+{
+	PxF32 t = 0.7f * timestep * 8.0f;
+	t = PxMin(t, 1.0f);
+	newPosition = oldPosition * (1 - t) + newPosition * t;
+}
+
+void SampleVehicle_CameraController::update(const PxReal dtime, const PxRigidDynamic* actor, PxScene& scene)
+{
+	PxSceneReadLock scopedLock(scene);
+	PxTransform carChassisTransfm;
+	if(mLockOnFocusVehTransform)
+	{
+		carChassisTransfm = actor->getGlobalPose();
+		mLastFocusVehTransform = carChassisTransfm;
+	}
+	else
+	{
+		carChassisTransfm = mLastFocusVehTransform;
+	}
+
+	PxF32 camDist = 15.0f;
+	PxF32 cameraYRotExtra = 0.0f;
+
+	PxVec3 velocity = mLastCarPos-carChassisTransfm.p;
+
+	if (mCameraInit)
+	{
+		//Work out the forward and sideways directions.
+		PxVec3 unitZ(0,0,1);
+		PxVec3 carDirection = carChassisTransfm.q.rotate(unitZ);
+		PxVec3 unitX(1,0,0);
+		PxVec3 carSideDirection = carChassisTransfm.q.rotate(unitX);
+
+		//Acceleration (note that is not scaled by time).
+		PxVec3 acclVec = mLastCarVelocity-velocity;
+
+		//Higher forward accelerations allow the car to speed away from the camera.
+		PxF32 acclZ = carDirection.dot(acclVec);
+		camDist = PxMax(camDist+acclZ*400.0f, 5.0f);
+
+		//Higher sideways accelerations allow the car's rotation to speed away from the camera's rotation.
+		PxF32 acclX = carSideDirection.dot(acclVec);
+		cameraYRotExtra = -acclX*10.0f;
+		//At very small sideways speeds the camera greatly amplifies any numeric error in the body and leads to a slight jitter.
+		//Scale cameraYRotExtra by a value in range (0,1) for side speeds in range (0.1,1.0) and by zero for side speeds less than 0.1.
+		PxFixedSizeLookupTable<4> table;
+		table.addPair(0.0f, 0.0f);
+		table.addPair(0.1f*dtime, 0);
+		table.addPair(1.0f*dtime, 1);
+		PxF32 velX = carSideDirection.dot(velocity);
+		cameraYRotExtra *= table.getYVal(PxAbs(velX));
+	}
+
+	mCameraRotateAngleY+=mRotateInputY*mMaxCameraRotateSpeed*dtime;
+	mCameraRotateAngleY=physx::intrinsics::fsel(mCameraRotateAngleY-10*PxPi, mCameraRotateAngleY-10*PxPi, physx::intrinsics::fsel(-mCameraRotateAngleY-10*PxPi, mCameraRotateAngleY + 10*PxPi, mCameraRotateAngleY));
+	mCameraRotateAngleZ+=mRotateInputZ*mMaxCameraRotateSpeed*dtime;
+	mCameraRotateAngleZ=PxClamp(mCameraRotateAngleZ,-PxPi*0.05f,PxPi*0.45f);
+
+	PxVec3 cameraDir=PxVec3(0,0,1)*PxCos(mCameraRotateAngleY+cameraYRotExtra) + PxVec3(1,0,0)*PxSin(mCameraRotateAngleY+cameraYRotExtra);
+
+	cameraDir=cameraDir*PxCos(mCameraRotateAngleZ)-PxVec3(0,1,0)*PxSin(mCameraRotateAngleZ);
+
+	const PxVec3 direction = carChassisTransfm.q.rotate(cameraDir);
+	PxVec3 target = carChassisTransfm.p;
+	target.y+=0.5f;
+
+	PxRaycastBuffer hit;
+	PxQueryFilterData filterData(PxQueryFlag::eSTATIC);
+	scene.raycast(target, -direction, camDist, hit, PxHitFlag::eDISTANCE, filterData);
+	if (hit.hasBlock && hit.block.shape != NULL)
+	{
+		camDist = hit.block.distance-0.25f;
+	}
+
+	camDist = PxMax(5.0f, PxMin(camDist, 50.0f));
+
+	PxVec3 position = target-direction*camDist;
+
+	if (mCameraInit)
+	{
+		dampVec3(mCameraPos, position, dtime);
+		dampVec3(mCameraTargetPos, target, dtime);
+	}
+
+	mCameraPos = position;
+	mCameraTargetPos = target;
+	mCameraInit = true;
+
+	mLastCarVelocity = velocity;
+	mLastCarPos = carChassisTransfm.p;
+}
+
+void SampleVehicle_CameraController::update(const PxReal dtime, const PxVehicleWheels& focusVehicle, PxScene& scene)
+{
+	const PxRigidDynamic* actor=focusVehicle.getRigidDynamicActor();
+	update(dtime,actor,scene);
+}
+
+