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70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include "EditorDefs.h"
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#include "Triangulate.h"
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// this file is essentially a wrapper for a portion of the MIT-licenced
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// ConvexDecomposition library by John W. Ratcliff mailto:jratcliffscarab@gmail.com.
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// it contains no code from that library, it just provides it with the required types, then includes the
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// portion we need.
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static const float TRIANGULATION_EPSILON = 0.0000000001f;
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#define MEMALLOC_MALLOC malloc
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#define MEMALLOC_FREE free
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namespace TriInternal
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{
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class TVec;
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typedef double NxF64;
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typedef float NxF32;
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typedef unsigned char NxU8;
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typedef unsigned int NxU32;
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typedef int NxI32;
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typedef unsigned int TU32;
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typedef std::vector< TVec > TVecVector;
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typedef std::vector< NxU32 > TU32Vector;
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#include "Contrib/NvFloatMath.inl"
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}
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#undef MEMALLOC_MALLOC
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#undef MEMALLOC_FREE
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namespace Triangulator
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{
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// given the contour of a triangle, triangulate it, and return the result
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// as a set of triangles
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// return false if you fail to triangulate it.
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bool Triangulate(const VectorOfVectors& contour, VectorOfVectors& result)
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{
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TriInternal::CTriangulator tri;
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for (auto pt : contour)
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{
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tri.addPoint(pt.x, pt.y, pt.z);
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}
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TriInternal::NxU32 tricount = 0;
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TriInternal::NxU32* indices = tri.triangulate(tricount, TRIANGULATION_EPSILON);
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if (!indices)
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{
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return false;
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}
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for (TriInternal::NxU32 currentIdx = 0; currentIdx < tricount * 3; ++currentIdx)
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{
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TriInternal::NxU32 indexValue = *indices++;
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result.push_back(contour[indexValue]);
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}
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return result.size() > 2;
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}
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}
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