NvCloth library v1.0.0

1 files changed, 151 insertions, 0 deletions

diff --git a/NvCloth/src/MovingAverage.h b/NvCloth/src/MovingAverage.h
new file mode 100644
index 0000000..f524d95
--- /dev/null
+++ b/NvCloth/src/MovingAverage.h
@@ -0,0 +1,151 @@
+// 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.
+
+#pragma once
+
+#include "NvCloth/Allocator.h"
+#include <algorithm>
+#include "NvCloth/Callbacks.h"
+
+namespace nv
+{
+namespace cloth
+{
+
+struct MovingAverage
+{
+	struct Element
+	{
+		uint32_t mCount;
+		float mValue;
+	};
+
+  public:
+	MovingAverage(uint32_t n = 1) : mCount(0), mSize(n)
+	{
+	}
+
+	bool empty() const
+	{
+		return mData.empty();
+	}
+
+	uint32_t size() const
+	{
+		return mSize;
+	}
+
+	void resize(uint32_t n)
+	{
+		NV_CLOTH_ASSERT(n);
+		mSize = n;
+		trim();
+	}
+
+	void reset()
+	{
+		mData.resize(0);
+		mCount = 0;
+	}
+
+	void push(uint32_t n, float value)
+	{
+		n = std::min(n, mSize);
+
+		if (mData.empty() || mData.back().mValue != value)
+		{
+			Element element = { n, value };
+			mData.pushBack(element);
+		}
+		else
+		{
+			mData.back().mCount += n;
+		}
+
+		mCount += n;
+		trim();
+	}
+
+	float average() const
+	{
+		NV_CLOTH_ASSERT(!mData.empty());
+
+		float sum = 0.0f;
+		Vector<Element>::Type::ConstIterator it = mData.begin(), end = mData.end();
+		for (; it != end; ++it)
+			sum += it->mCount * it->mValue;
+
+		// linear weight ramps at both ends for smoother average
+		uint32_t n = mCount / 8;
+		float ramp = 0.0f, temp = 0.0f;
+		uint32_t countLo = (it = mData.begin())->mCount;
+		uint32_t countHi = (--end)->mCount;
+		for (uint32_t i = 0; i < n; ++i)
+		{
+			if (i == countLo)
+				countLo += (++it)->mCount;
+			if (i == countHi)
+				countHi += (--end)->mCount;
+
+			temp += it->mValue + end->mValue;
+			ramp += temp;
+		}
+
+		uint32_t num = (mCount - n) * (n + 1);
+		return (sum * (n + 1) - ramp) / num;
+	}
+
+  private:
+	// remove oldest (front) values until mCount<=mSize
+	void trim()
+	{
+		Vector<Element>::Type::Iterator it = mData.begin();
+		for (uint32_t k = mSize; k < mCount; it += k <= mCount)
+		{
+			k += it->mCount;
+			it->mCount = k - mCount;
+		}
+
+		if (it != mData.begin())
+		{
+			Vector<Element>::Type tmp;
+			tmp.assign(it, mData.end());
+			tmp.swap(mData);
+		}
+
+		mCount = std::min(mCount, mSize);
+	}
+
+	Vector<Element>::Type mData;
+
+	uint32_t mCount;
+	uint32_t mSize;
+};
+}
+}