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physx/samples/sampleframework/framework/include/SampleTree.h

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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) 2008-2021 NVIDIA Corporation. All rights reserved.
+
+#ifndef SAMPLE_TREE_H
+#define	SAMPLE_TREE_H
+
+#include "foundation/Px.h"
+
+namespace SampleFramework
+{
+
+class Tree
+{
+public:
+	class Node
+	{
+	public:
+		Node() : mParent(NULL), mHead(NULL), mTail(NULL), mPrev(NULL), mNext(NULL)
+		{
+		}
+
+	private:
+		Node(const Node& node);
+		Node& operator=(const Node& node);
+
+	public:
+		PX_FORCE_INLINE	bool	isRoot()			const	{ return NULL == mParent; }
+		PX_FORCE_INLINE	bool	isLeaf()			const	{ return NULL == mHead; }
+
+		PX_FORCE_INLINE	Node*	getParent()			const	{ return mParent; }
+		PX_FORCE_INLINE	Node*	getFirstChild()		const	{ return mHead; }
+		PX_FORCE_INLINE	Node*	getLastChild()		const	{ return mTail; }
+		PX_FORCE_INLINE	Node*	getPrevSibling()	const	{ return mPrev; }
+		PX_FORCE_INLINE	Node*	getNextSibling()	const	{ return mNext; }
+
+		PX_FORCE_INLINE	Node*	getFirstLeaf()		const	{ return NULL == mHead ? const_cast<Node*>(this) : mHead->getFirstLeaf(); }
+		PX_FORCE_INLINE	Node*	getLastLeaf()		const	{ return NULL == mTail ? const_cast<Node*>(this) : mTail->getLastLeaf(); }
+
+		bool	isOffspringOf(const Node& node)		const
+		{
+			return (this == &node) || (NULL != mParent && mParent->isOffspringOf(node));
+		}
+
+	public:
+		bool appendChild(Node& node);
+		bool removeChild(Node& node);
+
+	private:
+		Node*	mParent;
+		Node*	mHead;
+		Node*	mTail;
+		Node*	mPrev;
+		Node*	mNext;
+	};
+};
+
+} // namespace SampleFramework
+
+#endif