forked from bartvdbraak/blender
149 lines
2.9 KiB
C++
149 lines
2.9 KiB
C++
//
|
|
// Copyright (c) 2009 Mikko Mononen memon@inside.org
|
|
//
|
|
// This software is provided 'as-is', without any express or implied
|
|
// warranty. In no event will the authors be held liable for any damages
|
|
// arising from the use of this software.
|
|
// Permission is granted to anyone to use this software for any purpose,
|
|
// including commercial applications, and to alter it and redistribute it
|
|
// freely, subject to the following restrictions:
|
|
// 1. The origin of this software must not be misrepresented; you must not
|
|
// claim that you wrote the original software. If you use this software
|
|
// in a product, an acknowledgment in the product documentation would be
|
|
// appreciated but is not required.
|
|
// 2. Altered source versions must be plainly marked as such, and must not be
|
|
// misrepresented as being the original software.
|
|
// 3. This notice may not be removed or altered from any source distribution.
|
|
//
|
|
|
|
#ifndef DETOURNODE_H
|
|
#define DETOURNODE_H
|
|
|
|
enum dtNodeFlags
|
|
{
|
|
DT_NODE_OPEN = 0x01,
|
|
DT_NODE_CLOSED = 0x02,
|
|
};
|
|
|
|
struct dtNode
|
|
{
|
|
float cost;
|
|
float total;
|
|
unsigned int id;
|
|
unsigned int pidx : 30;
|
|
unsigned int flags : 2;
|
|
};
|
|
|
|
class dtNodePool
|
|
{
|
|
public:
|
|
dtNodePool(int maxNodes, int hashSize);
|
|
~dtNodePool();
|
|
inline void operator=(const dtNodePool&) {}
|
|
void clear();
|
|
dtNode* getNode(unsigned int id);
|
|
const dtNode* findNode(unsigned int id) const;
|
|
|
|
inline unsigned int getNodeIdx(const dtNode* node) const
|
|
{
|
|
if (!node) return 0;
|
|
return (unsigned int)(node - m_nodes)+1;
|
|
}
|
|
|
|
inline dtNode* getNodeAtIdx(unsigned int idx)
|
|
{
|
|
if (!idx) return 0;
|
|
return &m_nodes[idx-1];
|
|
}
|
|
|
|
inline int getMemUsed() const
|
|
{
|
|
return sizeof(*this) +
|
|
sizeof(dtNode)*m_maxNodes +
|
|
sizeof(unsigned short)*m_maxNodes +
|
|
sizeof(unsigned short)*m_hashSize;
|
|
}
|
|
|
|
private:
|
|
inline unsigned int hashint(unsigned int a) const
|
|
{
|
|
a += ~(a<<15);
|
|
a ^= (a>>10);
|
|
a += (a<<3);
|
|
a ^= (a>>6);
|
|
a += ~(a<<11);
|
|
a ^= (a>>16);
|
|
return a;
|
|
}
|
|
|
|
dtNode* m_nodes;
|
|
unsigned short* m_first;
|
|
unsigned short* m_next;
|
|
const int m_maxNodes;
|
|
const int m_hashSize;
|
|
int m_nodeCount;
|
|
};
|
|
|
|
class dtNodeQueue
|
|
{
|
|
public:
|
|
dtNodeQueue(int n);
|
|
~dtNodeQueue();
|
|
inline void operator=(dtNodeQueue&) {}
|
|
|
|
inline void clear()
|
|
{
|
|
m_size = 0;
|
|
}
|
|
|
|
inline dtNode* top()
|
|
{
|
|
return m_heap[0];
|
|
}
|
|
|
|
inline dtNode* pop()
|
|
{
|
|
dtNode* result = m_heap[0];
|
|
m_size--;
|
|
trickleDown(0, m_heap[m_size]);
|
|
return result;
|
|
}
|
|
|
|
inline void push(dtNode* node)
|
|
{
|
|
m_size++;
|
|
bubbleUp(m_size-1, node);
|
|
}
|
|
|
|
inline void modify(dtNode* node)
|
|
{
|
|
for (int i = 0; i < m_size; ++i)
|
|
{
|
|
if (m_heap[i] == node)
|
|
{
|
|
bubbleUp(i, node);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
inline bool empty() const { return m_size == 0; }
|
|
|
|
inline int getMemUsed() const
|
|
{
|
|
return sizeof(*this) +
|
|
sizeof(dtNode*)*(m_capacity+1);
|
|
}
|
|
|
|
|
|
private:
|
|
void bubbleUp(int i, dtNode* node);
|
|
void trickleDown(int i, dtNode* node);
|
|
|
|
dtNode** m_heap;
|
|
const int m_capacity;
|
|
int m_size;
|
|
};
|
|
|
|
|
|
#endif // DETOURNODE_H
|