NvCloth library v1.0.0

1 files changed, 199 insertions, 0 deletions

diff --git a/NvCloth/src/SwFabric.cpp b/NvCloth/src/SwFabric.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) 2008-2017 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 "foundation/PxAssert.h"
+#include "SwFabric.h"
+#include "SwFactory.h"
+#include "PsSort.h"
+#include "limits.h" // for USHRT_MAX
+#include <algorithm>
+#include "PsUtilities.h"
+
+using namespace nv;
+using namespace physx;
+
+cloth::SwTether::SwTether(uint16_t anchor, float length) : mAnchor(anchor), mLength(length)
+{
+}
+
+cloth::SwFabric::SwFabric(SwFactory& factory, uint32_t numParticles, Range<const uint32_t> phaseIndices,
+                          Range<const uint32_t> sets, Range<const float> restvalues, Range<const float> stiffnessValues,
+						  Range<const uint32_t> indices, Range<const uint32_t> anchors, Range<const float> tetherLengths,
+                          Range<const uint32_t> triangles, uint32_t id)
+: mFactory(factory)
+, mNumParticles(numParticles)
+, mTetherLengthScale(1.0f), mId(id)
+{
+	// should no longer be prefixed with 0
+	NV_CLOTH_ASSERT(sets.front() != 0);
+
+#if PX_WINDOWS_FAMILY
+	const uint32_t kSimdWidth = 8; // avx
+#else
+	const uint32_t kSimdWidth = 4;
+#endif
+
+	// consistency check
+	NV_CLOTH_ASSERT(sets.back() == restvalues.size());
+	NV_CLOTH_ASSERT(restvalues.size() * 2 == indices.size());
+	NV_CLOTH_ASSERT(restvalues.size() == stiffnessValues.size() || stiffnessValues.size() == 0);
+	NV_CLOTH_ASSERT(mNumParticles > *shdfnd::maxElement(indices.begin(), indices.end()));
+	NV_CLOTH_ASSERT(mNumParticles + kSimdWidth - 1 <= USHRT_MAX);
+
+	mPhases.assign(phaseIndices.begin(), phaseIndices.end());
+	mSets.reserve(sets.size() + 1);
+	mSets.pushBack(0); // prefix with 0
+
+	mOriginalNumRestvalues = uint32_t(restvalues.size());
+
+	// padd indices for SIMD
+	const uint32_t* iBegin = indices.begin(), *iIt = iBegin;
+	const float* rBegin = restvalues.begin(), *rIt = rBegin;
+	const float* stBegin = stiffnessValues.begin(), *stIt = stBegin;
+	const uint32_t* sIt, *sEnd = sets.end();
+	for (sIt = sets.begin(); sIt != sEnd; ++sIt)
+	{
+		const float* rEnd = rBegin + *sIt;
+		const float* stEnd = stBegin + *sIt;
+		const uint32_t* iEnd = iBegin + *sIt * 2;
+		uint32_t numConstraints = uint32_t(rEnd - rIt);
+
+		for (; rIt != rEnd; ++rIt)
+		{
+			mRestvalues.pushBack(*rIt);
+		}
+		if (!stiffnessValues.empty())
+		{
+			for (; stIt != stEnd; ++stIt)
+			{
+				mStiffnessValues.pushBack(*stIt);
+			}
+		}
+		for (; iIt != iEnd; ++iIt)
+			mIndices.pushBack(uint16_t(*iIt));
+
+		// add dummy indices to make multiple of 4
+		for (; numConstraints &= kSimdWidth - 1; ++numConstraints)
+		{
+			mRestvalues.pushBack(-FLT_MAX);
+			if (!stiffnessValues.empty())
+				mStiffnessValues.pushBack(-FLT_MAX);
+			uint32_t index = mNumParticles + numConstraints - 1;
+			mIndices.pushBack(uint16_t(index));
+			mIndices.pushBack(uint16_t(index));
+		}
+
+		mSets.pushBack(uint32_t(mRestvalues.size()));
+	}
+
+	// trim overallocations
+	RestvalueContainer(mRestvalues.begin(), mRestvalues.end()).swap(mRestvalues);
+	RestvalueContainer(mStiffnessValues.begin(), mStiffnessValues.end()).swap(mStiffnessValues);
+	Vector<uint16_t>::Type(mIndices.begin(), mIndices.end()).swap(mIndices);
+
+	// tethers
+	NV_CLOTH_ASSERT(anchors.size() == tetherLengths.size());
+
+	// pad to allow for direct 16 byte (unaligned) loads
+	mTethers.reserve(anchors.size() + 2);
+	for (; !anchors.empty(); anchors.popFront(), tetherLengths.popFront())
+		mTethers.pushBack(SwTether(uint16_t(anchors.front()), tetherLengths.front()));
+
+	// triangles
+	mTriangles.reserve(triangles.size());
+	const uint32_t* iEnd = triangles.end();
+	for (iIt = triangles.begin(); iIt != iEnd; ++iIt)
+		mTriangles.pushBack(uint16_t(*iIt));
+
+	mFactory.mFabrics.pushBack(this);
+}
+
+cloth::SwFabric::~SwFabric()
+{
+	Vector<SwFabric*>::Type::Iterator fIt = mFactory.mFabrics.find(this);
+	NV_CLOTH_ASSERT(fIt != mFactory.mFabrics.end());
+	mFactory.mFabrics.replaceWithLast(fIt);
+}
+
+cloth::Factory& cloth::SwFabric::getFactory() const
+{
+	return mFactory;
+}
+
+uint32_t cloth::SwFabric::getNumPhases() const
+{
+	return uint32_t(mPhases.size());
+}
+
+uint32_t cloth::SwFabric::getNumRestvalues() const
+{
+	return mOriginalNumRestvalues;
+}
+
+uint32_t cloth::SwFabric::getNumStiffnessValues() const
+{
+	return mStiffnessValues.size()?mOriginalNumRestvalues:0;
+}
+
+uint32_t cloth::SwFabric::getNumSets() const
+{
+	return uint32_t(mSets.size() - 1);
+}
+
+uint32_t cloth::SwFabric::getNumIndices() const
+{
+	return 2 * mOriginalNumRestvalues;
+}
+
+uint32_t cloth::SwFabric::getNumParticles() const
+{
+	return mNumParticles;
+}
+
+uint32_t cloth::SwFabric::getNumTethers() const
+{
+	return uint32_t(mTethers.size());
+}
+
+uint32_t cloth::SwFabric::getNumTriangles() const
+{
+	return uint32_t(mTriangles.size()) / 3;
+}
+
+void cloth::SwFabric::scaleRestvalues(float scale)
+{
+	RestvalueContainer::Iterator rIt, rEnd = mRestvalues.end();
+	for (rIt = mRestvalues.begin(); rIt != rEnd; ++rIt)
+		*rIt *= scale;
+}
+
+void cloth::SwFabric::scaleTetherLengths(float scale)
+{
+	mTetherLengthScale *= scale;
+}