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authorsanine <sanine.not@pm.me>2022-03-04 10:47:15 -0600
committersanine <sanine.not@pm.me>2022-03-04 10:47:15 -0600
commit058f98a63658dc1a2579826ba167fd61bed1e21f (patch)
treebcba07a1615a14d943f3af3f815a42f3be86b2f3 /src/mesh/assimp-master/include/assimp/SmoothingGroups.inl
parent2f8028ac9e0812cb6f3cbb08f0f419e4e717bd22 (diff)
add assimp submodule
Diffstat (limited to 'src/mesh/assimp-master/include/assimp/SmoothingGroups.inl')
-rw-r--r--src/mesh/assimp-master/include/assimp/SmoothingGroups.inl141
1 files changed, 141 insertions, 0 deletions
diff --git a/src/mesh/assimp-master/include/assimp/SmoothingGroups.inl b/src/mesh/assimp-master/include/assimp/SmoothingGroups.inl
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+++ b/src/mesh/assimp-master/include/assimp/SmoothingGroups.inl
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+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+ copyright notice, this list of conditions and the
+ following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the
+ following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+ contributors may be used to endorse or promote products
+ derived from this software without specific prior
+ written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Generation of normal vectors basing on smoothing groups */
+
+#pragma once
+#ifndef AI_SMOOTHINGGROUPS_INL_INCLUDED
+#define AI_SMOOTHINGGROUPS_INL_INCLUDED
+
+#ifdef __GNUC__
+# pragma GCC system_header
+#endif
+
+#include <assimp/SGSpatialSort.h>
+
+#include <algorithm>
+
+using namespace Assimp;
+
+// ------------------------------------------------------------------------------------------------
+template <class T>
+void ComputeNormalsWithSmoothingsGroups(MeshWithSmoothingGroups<T>& sMesh)
+{
+ // First generate face normals
+ sMesh.mNormals.resize(sMesh.mPositions.size(),aiVector3D());
+ for( unsigned int a = 0; a < sMesh.mFaces.size(); a++)
+ {
+ T& face = sMesh.mFaces[a];
+
+ aiVector3D* pV1 = &sMesh.mPositions[face.mIndices[0]];
+ aiVector3D* pV2 = &sMesh.mPositions[face.mIndices[1]];
+ aiVector3D* pV3 = &sMesh.mPositions[face.mIndices[2]];
+
+ aiVector3D pDelta1 = *pV2 - *pV1;
+ aiVector3D pDelta2 = *pV3 - *pV1;
+ aiVector3D vNor = pDelta1 ^ pDelta2;
+
+ for (unsigned int c = 0; c < 3;++c)
+ sMesh.mNormals[face.mIndices[c]] = vNor;
+ }
+
+ // calculate the position bounds so we have a reliable epsilon to check position differences against
+ aiVector3D minVec( 1e10f, 1e10f, 1e10f), maxVec( -1e10f, -1e10f, -1e10f);
+ for( unsigned int a = 0; a < sMesh.mPositions.size(); a++)
+ {
+ minVec.x = std::min( minVec.x, sMesh.mPositions[a].x);
+ minVec.y = std::min( minVec.y, sMesh.mPositions[a].y);
+ minVec.z = std::min( minVec.z, sMesh.mPositions[a].z);
+ maxVec.x = std::max( maxVec.x, sMesh.mPositions[a].x);
+ maxVec.y = std::max( maxVec.y, sMesh.mPositions[a].y);
+ maxVec.z = std::max( maxVec.z, sMesh.mPositions[a].z);
+ }
+ const float posEpsilon = (maxVec - minVec).Length() * 1e-5f;
+ std::vector<aiVector3D> avNormals;
+ avNormals.resize(sMesh.mNormals.size());
+
+ // now generate the spatial sort tree
+ SGSpatialSort sSort;
+ for( typename std::vector<T>::iterator i = sMesh.mFaces.begin();
+ i != sMesh.mFaces.end();++i)
+ {
+ for (unsigned int c = 0; c < 3;++c)
+ sSort.Add(sMesh.mPositions[(*i).mIndices[c]],(*i).mIndices[c],(*i).iSmoothGroup);
+ }
+ sSort.Prepare();
+
+ std::vector<bool> vertexDone(sMesh.mPositions.size(),false);
+ for( typename std::vector<T>::iterator i = sMesh.mFaces.begin();
+ i != sMesh.mFaces.end();++i)
+ {
+ std::vector<unsigned int> poResult;
+ for (unsigned int c = 0; c < 3;++c)
+ {
+ unsigned int idx = (*i).mIndices[c];
+ if (vertexDone[idx])continue;
+
+ sSort.FindPositions(sMesh.mPositions[idx],(*i).iSmoothGroup,
+ posEpsilon,poResult);
+
+ aiVector3D vNormals;
+ for (std::vector<unsigned int>::const_iterator
+ a = poResult.begin();
+ a != poResult.end();++a)
+ {
+ vNormals += sMesh.mNormals[(*a)];
+ }
+ vNormals.NormalizeSafe();
+
+ // write back into all affected normals
+ for (std::vector<unsigned int>::const_iterator
+ a = poResult.begin();
+ a != poResult.end();++a)
+ {
+ idx = *a;
+ avNormals [idx] = vNormals;
+ vertexDone[idx] = true;
+ }
+ }
+ }
+ sMesh.mNormals = avNormals;
+}
+
+#endif // !! AI_SMOOTHINGGROUPS_INL_INCLUDED