137 lines
4.1 KiB
C++
137 lines
4.1 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_CHAIN_QUAD_H
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#define NL_CHAIN_QUAD_H
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#include "nel/misc/types_nl.h"
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#include "nel/misc/aabbox.h"
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#include "chain.h"
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#include "collision_surface_temp.h"
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#include <vector>
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namespace NLPACS
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{
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using NLMISC::CVector;
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using NLMISC::IStream;
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// ***************************************************************************
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struct EChainQuad : public NLMISC::Exception
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{
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EChainQuad(const std::string &reason) : Exception(reason) { }
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};
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// ***************************************************************************
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/**
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* a quadgrid of list of edge chain.
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* \author Lionel Berenguier
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* \author Nevrax France
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* \date 2001
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*/
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class CChainQuad
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{
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public:
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/// Constructor
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CChainQuad();
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/// Copy Constructor
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CChainQuad(const CChainQuad &o);
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/// Destructor
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~CChainQuad();
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/// operator=.
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CChainQuad &operator=(const CChainQuad &o);
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/// build a chain quad, with a list of OrderedChains.
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void build(const std::vector<COrderedChain> &ochains);
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/** look in the quad to select a list of chain from a bbox.
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* NB: The outpout do not contains any redundant edge. A OChain appears only one time in the result.
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* \param bbox the area of interest.
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* \param cst the array of CEdgeChainEntry to fill. contain also OChainLUT, an array for internal use. In: must be filled with 0xFFFF. Out: still filled with 0xFFFF.
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* \return number of edgechain found. stored in cst.EdgeChainEntries (array cleared first).
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*/
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sint selectEdges(const NLMISC::CAABBox &bbox, CCollisionSurfaceTemp &cst) const;
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/** look in the quad to select a list of chain from a bbox.
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* NB: The outpout do not contains any redundant edge. A OChain appears only one time in the result.
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* \param start the starting point of the selection segment.
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* \param end the ending point of the selection segment.
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* \param cst the array of CEdgeChainEntry to fill. contain also OChainLUT, an array for internal use. In: must be filled with 0xFFFF. Out: still filled with 0xFFFF.
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* \return number of edgechain found. stored in cst.EdgeChainEntries (array cleared first).
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*/
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sint selectEdges(CVector start, CVector end, CCollisionSurfaceTemp &cst) const;
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/// serial.
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void serial(NLMISC::IStream &f);
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/// clear
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void clear()
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{
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NLMISC::contReset(_Quad);
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_Width = 0;
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_Height = 0;
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_X = 0;
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_Y = 0;
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delete [] _QuadData;
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_QuadData = NULL;
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_QuadDataLen = 0;
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}
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// **************************
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private:
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/** W*H pointers on array of CEdgeChainEntry. NULL if no edge in this quad.
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* Each array is 1xuint16(LEN) + LEN*CEdgeChainEntry.
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*/
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std::vector<uint8*> _Quad;
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/// Width of the quadgrid.
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uint32 _Width;
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/// Height of the quadgrid.
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uint32 _Height;
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/// Postion of the chainquad.
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sint32 _X, _Y;
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/// Single memory block of CEdgeChainEntry chains.
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uint8 *_QuadData;
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/// size (in byte) of _QuadData.
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uint32 _QuadDataLen;
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static const float _QuadElementSize; // = 4 meters.
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private:
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void addEdgeToQuadNode(std::list<CEdgeChainEntry> &quadNode, sint ochainId, sint edgeId);
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// get local integer bounds in the grid.
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void getGridBounds(sint32 &x0, sint32 &y0, sint32 &x1, sint32 &y1, const CVector &minP, const CVector &maxP) const;
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};
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} // NLPACS
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#endif // NL_CHAIN_QUAD_H
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/* End of chain_quad.h */
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