75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
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/******************************Module*Header*******************************\
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* Module Name: node.h
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*
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* Node stuff
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*
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* Copyright (c) 1995 Microsoft Corporation
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*
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\**************************************************************************/
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#ifndef __node_h__
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#define __node_h__
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#include "sscommon.h"
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#include "sspipes.h"
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#define NUM_NODE (NUM_DIV - 1) // num nodes in longest dimension
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// maximum weighting of going straight for direction choosing functions
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#define MAX_WEIGHT_STRAIGHT 100
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// Node class
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class Node {
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public:
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void MarkAsTaken() { empty = FALSE; }
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void MarkAsEmpty() { empty = TRUE; }
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BOOL IsEmpty() { return empty; }
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private:
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GLboolean empty;
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};
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/**************************************************************************\
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*
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* Node array class
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*
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* - 3d array of nodes
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* - Functions to access node neighbours, query if taken or not, etc.
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* - Not only is this the node array, but a set of methods that operates on it
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*
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\**************************************************************************/
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class NODE_ARRAY {
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public:
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NODE_ARRAY();
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~NODE_ARRAY();
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void Resize( IPOINT3D *pNewSize ); // new array size
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void Reset(); // set all nodes to empty
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int ChooseRandomDirection( IPOINT3D *pos, int dir, int weight );
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int ChoosePreferredDirection( IPOINT3D *pos, int dir, int *prefDirs,
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int nPrefDirs );
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int ChooseNewTurnDirection( IPOINT3D *pos, int dir );
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int FindClearestDirection( IPOINT3D *pos );
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int GetBestPossibleTurns( IPOINT3D *pos, int dir, int *turnDirs );
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BOOL FindRandomEmptyNode( IPOINT3D *ip3dEmpty );
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BOOL FindRandomEmptyNode2D( IPOINT3D *pos, int plane, int *box );
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BOOL TakeClosestEmptyNode( IPOINT3D *newPos, IPOINT3D *pos );
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void NodeVisited( IPOINT3D *pos );
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void GetNodeCount( IPOINT3D *pos );
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private:
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Node *nodes; // ptr to node array
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int lock; // semaphore lock for >1 drawing pipes
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IPOINT3D numNodes; // x,y,z dimensions of node array
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int nodeDirInc[NUM_DIRS]; // array offset between nodes for each dir
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void GetNeighbours( IPOINT3D *pos, Node **nNode );
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Node* GetNode( IPOINT3D *pos );
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Node* GetNextNode( IPOINT3D *pos, int dir );
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BOOL GetNextNodePos( IPOINT3D *curPos, IPOINT3D *nextPos, int dir );
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int GetEmptyNeighbours( Node **nNode, int *nEmpty );
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int GetEmptyTurnNeighbours( Node **nNode, int *nEmpty, int lastDir );
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int GetEmptyNeighboursAlongDir( IPOINT3D *pos, int dir,
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int searchRadius );
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};
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#endif // __node_h__
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