89 lines
2.6 KiB
C++
89 lines
2.6 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_PATCHUV_LOCATOR_H
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#define NL_PATCHUV_LOCATOR_H
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#include "nel/misc/types_nl.h"
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#include "nel/3d/patch.h"
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#include "nel/misc/vector_2f.h"
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namespace NL3D
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{
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// ***************************************************************************
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/**
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* From a patch and UV coordinate in [0,OrderS], [0,OrderT], retrieve the appropriate coordinate in neighborhood.
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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 CPatchUVLocator
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{
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public:
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// build information for a patch and his 1 to 4 neigbhor on a edge.
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void build(const CPatch *patchCenter, sint edgeCenter, CPatch::CBindInfo &bindInfo);
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// for an uv given in src patch basis, find the associate patch.
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uint selectPatch(const NLMISC::CVector2f &uvIn);
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// for an uv given in src patch basis, and the number of patch we want (for bind 1/X, see selectPatch),
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// find the neighbor UV, and the neighbor patch.
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void locateUV(const NLMISC::CVector2f &uvIn, uint patch, CPatch *&patchOut, NLMISC::CVector2f &uvOut);
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/** return true only if the 2 edges have same number of tiles.
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* bind 1/X case: return true only if ALL the adjacents patchs respect this rule. So you are sure that
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* for all the src patch, one tile has exaclty one neighbor tile near him.
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*/
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bool sameEdgeOrder() const {return _SameEdgeOrder;}
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private:
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struct CUVBasis
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{
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NLMISC::CVector2f UvI, UvJ, UvP;
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void mulPoint(const NLMISC::CVector2f &uvIn, NLMISC::CVector2f &uvOut)
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{
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uvOut= UvP + uvIn.x * UvI + uvIn.y * UvJ;
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}
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};
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private:
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CPatch *_CenterPatch;
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sint _CenterPatchEdge;
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sint _NPatchs;
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CPatch *_NeighborPatch[4];
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CUVBasis _NeighborBasis[4];
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bool _SameEdgeOrder;
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};
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} // NL3D
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#endif // NL_PATCHUV_LOCATOR_H
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/* End of patchuv_locator.h */
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