62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/*******************************************************************************
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 David Williams and Matthew Williams
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*******************************************************************************/
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#ifndef __PolyVox_DefaultIsQuadNeeded_H__
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#define __PolyVox_DefaultIsQuadNeeded_H__
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#include "Impl/PlatformDefinitions.h"
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#include <cstdint>
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namespace PolyVox
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{
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/// Default implementation of a function object for deciding when
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/// the cubic surface extractor should insert a face between two voxels.
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///
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/// The criteria used here are that the voxel in front of the potential
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/// quad should have a value of zero (which would typically indicate empty
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/// space) while the voxel behind the potential quad would have a value
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/// geater than zero (typically indicating it is solid). Note that for
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/// different behaviour users can create their own implementation and pass
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/// it to extractCubicMesh().
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template<typename VoxelType>
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class DefaultIsQuadNeeded
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{
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public:
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bool operator()(VoxelType back, VoxelType front, VoxelType& materialToUse)
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{
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if ((back > 0) && (front == 0))
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{
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materialToUse = static_cast<VoxelType>(back);
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return true;
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}
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else
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{
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return false;
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}
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}
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};
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}
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#endif //__PolyVox_DefaultIsQuadNeeded_H__
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