feat(physics): wire physx sdk into build

engine/third_party/physx/snippets/snippetrender/SnippetCamera.cpp

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+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2008-2025 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 "SnippetCamera.h"
+#include <ctype.h>
+#include "foundation/PxMat33.h"
+
+using namespace physx;
+
+namespace Snippets
+{
+
+Camera::Camera(const PxVec3& eye, const PxVec3& dir) : mMouseX(0), mMouseY(0), mSpeed(2.0f)
+{
+	mEye = eye;
+	mDir = dir.getNormalized();
+}
+
+void Camera::handleMouse(int button, int state, int x, int y)
+{
+	PX_UNUSED(state);
+	PX_UNUSED(button);
+	mMouseX = x;
+	mMouseY = y;
+}
+
+bool Camera::handleKey(unsigned char key, int x, int y, float speed)
+{
+	PX_UNUSED(x);
+	PX_UNUSED(y);
+
+	const PxVec3 viewY = mDir.cross(PxVec3(0,1,0)).getNormalized();
+	switch(toupper(key))
+	{
+		case 'W':	mEye += mDir*mSpeed*speed;	break;
+		case 'S':	mEye -= mDir*mSpeed*speed;	break;
+		case 'A':	mEye -= viewY*mSpeed*speed;	break;
+		case 'D':	mEye += viewY*mSpeed*speed;	break;
+		default:								return false;
+	}
+	return true;
+}
+
+void Camera::handleAnalogMove(float x, float y)
+{
+	PxVec3 viewY = mDir.cross(PxVec3(0,1,0)).getNormalized();
+	mEye += mDir*y;
+	mEye += viewY*x;
+}
+
+void Camera::handleMotion(int x, int y)
+{
+	const int dx = mMouseX - x;
+	const int dy = mMouseY - y;
+
+	const PxVec3 viewY = mDir.cross(PxVec3(0,1,0)).getNormalized();
+
+    const float Sensitivity = PxPi * 0.5f / 180.0f;
+
+	const PxQuat qx(Sensitivity * dx, PxVec3(0,1,0));
+	mDir = qx.rotate(mDir);
+	const PxQuat qy(Sensitivity * dy, viewY);
+	mDir = qy.rotate(mDir);
+
+	mDir.normalize();
+
+	mMouseX = x;
+	mMouseY = y;
+}
+
+PxTransform Camera::getTransform() const
+{
+	PxVec3 viewY = mDir.cross(PxVec3(0,1,0));
+
+	if(viewY.normalize()<1e-6f) 
+		return PxTransform(mEye);
+
+	const PxMat33 m(mDir.cross(viewY), viewY, -mDir);
+	return PxTransform(mEye, PxQuat(m));
+}
+
+PxVec3 Camera::getEye() const
+{ 
+	return mEye; 
+}
+
+PxVec3 Camera::getDir() const
+{ 
+	return mDir; 
+}
+
+void Camera::setPose(const PxVec3& eye, const PxVec3& dir)
+{
+	mEye = eye;
+	mDir = dir;
+}
+
+void Camera::setSpeed(float speed)
+{
+	mSpeed = speed;
+}
+
+}
+