mirror of
https://github.com/dhewm/dhewm3.git
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233 lines
9.8 KiB
C++
233 lines
9.8 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __BRUSHBSP_H__
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#define __BRUSHBSP_H__
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/*
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===============================================================================
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BrushBSP
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===============================================================================
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*/
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class idBrushBSP;
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class idBrushBSPNode;
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class idBrushBSPPortal;
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//===============================================================
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//
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// idBrushBSPPortal
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//
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//===============================================================
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class idBrushBSPPortal {
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friend class idBrushBSP;
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friend class idBrushBSPNode;
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public:
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idBrushBSPPortal( void );
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~idBrushBSPPortal( void );
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void AddToNodes( idBrushBSPNode *front, idBrushBSPNode *back );
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void RemoveFromNode( idBrushBSPNode *l );
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void Flip( void );
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int Split( const idPlane &splitPlane, idBrushBSPPortal **front, idBrushBSPPortal **back );
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idWinding * GetWinding( void ) const { return winding; }
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const idPlane & GetPlane( void ) const { return plane; }
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void SetFaceNum( int num ) { faceNum = num; }
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int GetFaceNum( void ) const { return faceNum; }
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int GetFlags( void ) const { return flags; }
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void SetFlag( int flag ) { flags |= flag; }
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void RemoveFlag( int flag ) { flags &= ~flag; }
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idBrushBSPPortal * Next( int side ) const { return next[side]; }
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idBrushBSPNode * GetNode( int side ) const { return nodes[side]; }
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private:
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idPlane plane; // portal plane
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int planeNum; // number of plane this portal is on
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idWinding * winding; // portal winding
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idBrushBSPNode * nodes[2]; // nodes this portal seperates
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idBrushBSPPortal * next[2]; // next portal in list for both nodes
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int flags; // portal flags
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int faceNum; // number of the face created for this portal
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};
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//===============================================================
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//
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// idBrushBSPNode
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//
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//===============================================================
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#define NODE_VISITED BIT(30)
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#define NODE_DONE BIT(31)
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class idBrushBSPNode {
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friend class idBrushBSP;
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friend class idBrushBSPPortal;
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public:
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idBrushBSPNode( void );
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~idBrushBSPNode( void );
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void SetContentsFromBrushes( void );
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idBounds GetPortalBounds( void );
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idBrushBSPNode * GetChild( int index ) const { return children[index]; }
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idBrushBSPNode * GetParent( void ) const { return parent; }
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void SetContents( int contents ) { this->contents = contents; }
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int GetContents( void ) const { return contents; }
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const idPlane & GetPlane( void ) const { return plane; }
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idBrushBSPPortal * GetPortals( void ) const { return portals; }
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void SetAreaNum( int num ) { areaNum = num; }
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int GetAreaNum( void ) const { return areaNum; }
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int GetFlags( void ) const { return flags; }
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void SetFlag( int flag ) { flags |= flag; }
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void RemoveFlag( int flag ) { flags &= ~flag; }
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bool TestLeafNode( void );
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// remove the flag from nodes found by flooding through portals to nodes with the flag set
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void RemoveFlagFlood( int flag );
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// recurse down the tree and remove the flag from all visited nodes
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void RemoveFlagRecurse( int flag );
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// first recurse down the tree and flood from there
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void RemoveFlagRecurseFlood( int flag );
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// returns side of the plane the node is on
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int PlaneSide( const idPlane &plane, float epsilon = ON_EPSILON ) const;
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// split the leaf node with a plane
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bool Split( const idPlane &splitPlane, int splitPlaneNum );
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private:
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idPlane plane; // split plane if this is not a leaf node
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idBrush * volume; // node volume
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int contents; // node contents
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idBrushList brushList; // list with brushes for this node
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idBrushBSPNode * parent; // parent of this node
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idBrushBSPNode * children[2]; // both are NULL if this is a leaf node
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idBrushBSPPortal * portals; // portals of this node
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int flags; // node flags
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int areaNum; // number of the area created for this node
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int occupied; // true when portal is occupied
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};
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//===============================================================
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//
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// idBrushBSP
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//
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//===============================================================
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class idBrushBSP {
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public:
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idBrushBSP( void );
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~idBrushBSP( void );
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// build a bsp tree from a set of brushes
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void Build( idBrushList brushList, int skipContents,
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bool (*ChopAllowed)( idBrush *b1, idBrush *b2 ),
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bool (*MergeAllowed)( idBrush *b1, idBrush *b2 ) );
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// remove splits in subspaces with the given contents
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void PruneTree( int contents );
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// portalize the bsp tree
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void Portalize( void );
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// remove subspaces outside the map not reachable by entities
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bool RemoveOutside( const idMapFile *mapFile, int contents, const idStrList &classNames );
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// write file with a trace going through a leak
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void LeakFile( const idStr &fileName );
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// try to merge portals
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void MergePortals( int skipContents );
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// try to merge the two leaf nodes at either side of the portal
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bool TryMergeLeafNodes( idBrushBSPPortal *portal, int side );
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void PruneMergedTree_r( idBrushBSPNode *node );
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// melt portal windings
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void MeltPortals( int skipContents );
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// write a map file with a brush for every leaf node that has the given contents
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void WriteBrushMap( const idStr &fileName, const idStr &ext, int contents );
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// bounds for the whole tree
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const idBounds & GetTreeBounds( void ) const { return treeBounds; }
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// root node of the tree
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idBrushBSPNode * GetRootNode( void ) const { return root; }
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private:
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idBrushBSPNode * root;
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idBrushBSPNode * outside;
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idBounds treeBounds;
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idPlaneSet portalPlanes;
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int numGridCells;
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int numSplits;
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int numGridCellSplits;
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int numPrunedSplits;
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int numPortals;
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int solidLeafNodes;
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int outsideLeafNodes;
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int insideLeafNodes;
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int numMergedPortals;
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int numInsertedPoints;
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idVec3 leakOrigin;
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int brushMapContents;
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idBrushMap * brushMap;
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bool (*BrushChopAllowed)( idBrush *b1, idBrush *b2 );
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bool (*BrushMergeAllowed)( idBrush *b1, idBrush *b2 );
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private:
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void RemoveMultipleLeafNodeReferences_r( idBrushBSPNode *node );
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void Free_r( idBrushBSPNode *node );
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void IncreaseNumSplits( void );
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bool IsValidSplitter( const idBrushSide *side );
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int BrushSplitterStats( const idBrush *brush, int planeNum, const idPlaneSet &planeList, bool *testedPlanes, struct splitterStats_s &stats );
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int FindSplitter( idBrushBSPNode *node, const idPlaneSet &planeList, bool *testedPlanes, struct splitterStats_s &bestStats );
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void SetSplitterUsed( idBrushBSPNode *node, int planeNum );
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idBrushBSPNode * BuildBrushBSP_r( idBrushBSPNode *node, const idPlaneSet &planeList, bool *testedPlanes, int skipContents );
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idBrushBSPNode * ProcessGridCell( idBrushBSPNode *node, int skipContents );
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void BuildGrid_r( idList<idBrushBSPNode *> &gridCells, idBrushBSPNode *node );
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void PruneTree_r( idBrushBSPNode *node, int contents );
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void MakeOutsidePortals( void );
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idWinding * BaseWindingForNode( idBrushBSPNode *node );
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void MakeNodePortal( idBrushBSPNode *node );
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void SplitNodePortals( idBrushBSPNode *node );
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void MakeTreePortals_r( idBrushBSPNode *node );
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void FloodThroughPortals_r( idBrushBSPNode *node, int contents, int depth );
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bool FloodFromOrigin( const idVec3 &origin, int contents );
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bool FloodFromEntities( const idMapFile *mapFile, int contents, const idStrList &classNames );
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void RemoveOutside_r( idBrushBSPNode *node, int contents );
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void SetPortalPlanes_r( idBrushBSPNode *node, idPlaneSet &planeList );
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void SetPortalPlanes( void );
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void MergePortals_r( idBrushBSPNode *node, int skipContents );
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void MergeLeafNodePortals( idBrushBSPNode *node, int skipContents );
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void UpdateTreeAfterMerge_r( idBrushBSPNode *node, const idBounds &bounds, idBrushBSPNode *oldNode, idBrushBSPNode *newNode );
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void RemoveLeafNodeColinearPoints( idBrushBSPNode *node );
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void RemoveColinearPoints_r( idBrushBSPNode *node, int skipContents );
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void MeltFlood_r( idBrushBSPNode *node, int skipContents, idBounds &bounds, idVectorSet<idVec3,3> &vertexList );
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void MeltLeafNodePortals( idBrushBSPNode *node, int skipContents, idVectorSet<idVec3,3> &vertexList );
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void MeltPortals_r( idBrushBSPNode *node, int skipContents, idVectorSet<idVec3,3> &vertexList );
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};
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#endif /* !__BRUSHBSP_H__ */
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