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Diffstat (limited to 'src/mesh/assimp-master/code/PostProcessing/JoinVerticesProcess.cpp')
| -rw-r--r-- | src/mesh/assimp-master/code/PostProcessing/JoinVerticesProcess.cpp | 438 |
1 files changed, 0 insertions, 438 deletions
diff --git a/src/mesh/assimp-master/code/PostProcessing/JoinVerticesProcess.cpp b/src/mesh/assimp-master/code/PostProcessing/JoinVerticesProcess.cpp deleted file mode 100644 index 184e8d7..0000000 --- a/src/mesh/assimp-master/code/PostProcessing/JoinVerticesProcess.cpp +++ /dev/null @@ -1,438 +0,0 @@ -/* ---------------------------------------------------------------------------- -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 Implementation of the post processing step to join identical vertices - * for all imported meshes - */ - - -#ifndef ASSIMP_BUILD_NO_JOINVERTICES_PROCESS - -#include "JoinVerticesProcess.h" -#include "ProcessHelper.h" -#include <assimp/Vertex.h> -#include <assimp/TinyFormatter.h> -#include <stdio.h> -#include <unordered_set> - -using namespace Assimp; -// ------------------------------------------------------------------------------------------------ -// Constructor to be privately used by Importer -JoinVerticesProcess::JoinVerticesProcess() -{ - // nothing to do here -} - -// ------------------------------------------------------------------------------------------------ -// Destructor, private as well -JoinVerticesProcess::~JoinVerticesProcess() -{ - // nothing to do here -} - -// ------------------------------------------------------------------------------------------------ -// Returns whether the processing step is present in the given flag field. -bool JoinVerticesProcess::IsActive( unsigned int pFlags) const -{ - return (pFlags & aiProcess_JoinIdenticalVertices) != 0; -} -// ------------------------------------------------------------------------------------------------ -// Executes the post processing step on the given imported data. -void JoinVerticesProcess::Execute( aiScene* pScene) -{ - ASSIMP_LOG_DEBUG("JoinVerticesProcess begin"); - - // get the total number of vertices BEFORE the step is executed - int iNumOldVertices = 0; - if (!DefaultLogger::isNullLogger()) { - for( unsigned int a = 0; a < pScene->mNumMeshes; a++) { - iNumOldVertices += pScene->mMeshes[a]->mNumVertices; - } - } - - // execute the step - int iNumVertices = 0; - for( unsigned int a = 0; a < pScene->mNumMeshes; a++) - iNumVertices += ProcessMesh( pScene->mMeshes[a],a); - - // if logging is active, print detailed statistics - if (!DefaultLogger::isNullLogger()) { - if (iNumOldVertices == iNumVertices) { - ASSIMP_LOG_DEBUG("JoinVerticesProcess finished "); - } else { - ASSIMP_LOG_INFO("JoinVerticesProcess finished | Verts in: ", iNumOldVertices, - " out: ", iNumVertices, " | ~", - ((iNumOldVertices - iNumVertices) / (float)iNumOldVertices) * 100.f ); - } - } - - pScene->mFlags |= AI_SCENE_FLAGS_NON_VERBOSE_FORMAT; -} - -namespace { - -bool areVerticesEqual(const Vertex &lhs, const Vertex &rhs, bool complex) -{ - // A little helper to find locally close vertices faster. - // Try to reuse the lookup table from the last step. - const static float epsilon = 1e-5f; - // Squared because we check against squared length of the vector difference - static const float squareEpsilon = epsilon * epsilon; - - // Square compare is useful for animeshes vertices compare - if ((lhs.position - rhs.position).SquareLength() > squareEpsilon) { - return false; - } - - // We just test the other attributes even if they're not present in the mesh. - // In this case they're initialized to 0 so the comparison succeeds. - // By this method the non-present attributes are effectively ignored in the comparison. - if ((lhs.normal - rhs.normal).SquareLength() > squareEpsilon) { - return false; - } - - if ((lhs.texcoords[0] - rhs.texcoords[0]).SquareLength() > squareEpsilon) { - return false; - } - - if ((lhs.tangent - rhs.tangent).SquareLength() > squareEpsilon) { - return false; - } - - if ((lhs.bitangent - rhs.bitangent).SquareLength() > squareEpsilon) { - return false; - } - - // Usually we won't have vertex colors or multiple UVs, so we can skip from here - // Actually this increases runtime performance slightly, at least if branch - // prediction is on our side. - if (complex) { - for (int i = 0; i < 8; i++) { - if (i > 0 && (lhs.texcoords[i] - rhs.texcoords[i]).SquareLength() > squareEpsilon) { - return false; - } - if (GetColorDifference(lhs.colors[i], rhs.colors[i]) > squareEpsilon) { - return false; - } - } - } - return true; -} - -template<class XMesh> -void updateXMeshVertices(XMesh *pMesh, std::vector<Vertex> &uniqueVertices) { - // replace vertex data with the unique data sets - pMesh->mNumVertices = (unsigned int)uniqueVertices.size(); - - // ---------------------------------------------------------------------------- - // NOTE - we're *not* calling Vertex::SortBack() because it would check for - // presence of every single vertex component once PER VERTEX. And our CPU - // dislikes branches, even if they're easily predictable. - // ---------------------------------------------------------------------------- - - // Position, if present (check made for aiAnimMesh) - if (pMesh->mVertices) - { - delete [] pMesh->mVertices; - pMesh->mVertices = new aiVector3D[pMesh->mNumVertices]; - for (unsigned int a = 0; a < pMesh->mNumVertices; a++) { - pMesh->mVertices[a] = uniqueVertices[a].position; - } - } - - // Normals, if present - if (pMesh->mNormals) - { - delete [] pMesh->mNormals; - pMesh->mNormals = new aiVector3D[pMesh->mNumVertices]; - for( unsigned int a = 0; a < pMesh->mNumVertices; a++) { - pMesh->mNormals[a] = uniqueVertices[a].normal; - } - } - // Tangents, if present - if (pMesh->mTangents) - { - delete [] pMesh->mTangents; - pMesh->mTangents = new aiVector3D[pMesh->mNumVertices]; - for (unsigned int a = 0; a < pMesh->mNumVertices; a++) { - pMesh->mTangents[a] = uniqueVertices[a].tangent; - } - } - // Bitangents as well - if (pMesh->mBitangents) - { - delete [] pMesh->mBitangents; - pMesh->mBitangents = new aiVector3D[pMesh->mNumVertices]; - for (unsigned int a = 0; a < pMesh->mNumVertices; a++) { - pMesh->mBitangents[a] = uniqueVertices[a].bitangent; - } - } - // Vertex colors - for (unsigned int a = 0; pMesh->HasVertexColors(a); a++) - { - delete [] pMesh->mColors[a]; - pMesh->mColors[a] = new aiColor4D[pMesh->mNumVertices]; - for( unsigned int b = 0; b < pMesh->mNumVertices; b++) { - pMesh->mColors[a][b] = uniqueVertices[b].colors[a]; - } - } - // Texture coords - for (unsigned int a = 0; pMesh->HasTextureCoords(a); a++) - { - delete [] pMesh->mTextureCoords[a]; - pMesh->mTextureCoords[a] = new aiVector3D[pMesh->mNumVertices]; - for (unsigned int b = 0; b < pMesh->mNumVertices; b++) { - pMesh->mTextureCoords[a][b] = uniqueVertices[b].texcoords[a]; - } - } -} -} // namespace - -// ------------------------------------------------------------------------------------------------ -// Unites identical vertices in the given mesh -int JoinVerticesProcess::ProcessMesh( aiMesh* pMesh, unsigned int meshIndex) -{ - static_assert( AI_MAX_NUMBER_OF_COLOR_SETS == 8, "AI_MAX_NUMBER_OF_COLOR_SETS == 8"); - static_assert( AI_MAX_NUMBER_OF_TEXTURECOORDS == 8, "AI_MAX_NUMBER_OF_TEXTURECOORDS == 8"); - - // Return early if we don't have any positions - if (!pMesh->HasPositions() || !pMesh->HasFaces()) { - return 0; - } - - // We should care only about used vertices, not all of them - // (this can happen due to original file vertices buffer being used by - // multiple meshes) - std::unordered_set<unsigned int> usedVertexIndices; - usedVertexIndices.reserve(pMesh->mNumVertices); - for( unsigned int a = 0; a < pMesh->mNumFaces; a++) - { - aiFace& face = pMesh->mFaces[a]; - for( unsigned int b = 0; b < face.mNumIndices; b++) { - usedVertexIndices.insert(face.mIndices[b]); - } - } - - // We'll never have more vertices afterwards. - std::vector<Vertex> uniqueVertices; - uniqueVertices.reserve( pMesh->mNumVertices); - - // For each vertex the index of the vertex it was replaced by. - // Since the maximal number of vertices is 2^31-1, the most significand bit can be used to mark - // whether a new vertex was created for the index (true) or if it was replaced by an existing - // unique vertex (false). This saves an additional std::vector<bool> and greatly enhances - // branching performance. - static_assert(AI_MAX_VERTICES == 0x7fffffff, "AI_MAX_VERTICES == 0x7fffffff"); - std::vector<unsigned int> replaceIndex( pMesh->mNumVertices, 0xffffffff); - - // float posEpsilonSqr; - SpatialSort *vertexFinder = nullptr; - SpatialSort _vertexFinder; - - typedef std::pair<SpatialSort,float> SpatPair; - if (shared) { - std::vector<SpatPair >* avf; - shared->GetProperty(AI_SPP_SPATIAL_SORT,avf); - if (avf) { - SpatPair& blubb = (*avf)[meshIndex]; - vertexFinder = &blubb.first; - // posEpsilonSqr = blubb.second; - } - } - if (!vertexFinder) { - // bad, need to compute it. - _vertexFinder.Fill(pMesh->mVertices, pMesh->mNumVertices, sizeof( aiVector3D)); - vertexFinder = &_vertexFinder; - // posEpsilonSqr = ComputePositionEpsilon(pMesh); - } - - // Again, better waste some bytes than a realloc ... - std::vector<unsigned int> verticesFound; - verticesFound.reserve(10); - - // Run an optimized code path if we don't have multiple UVs or vertex colors. - // This should yield false in more than 99% of all imports ... - const bool complex = ( pMesh->GetNumColorChannels() > 0 || pMesh->GetNumUVChannels() > 1); - const bool hasAnimMeshes = pMesh->mNumAnimMeshes > 0; - - // We'll never have more vertices afterwards. - std::vector<std::vector<Vertex>> uniqueAnimatedVertices; - if (hasAnimMeshes) { - uniqueAnimatedVertices.resize(pMesh->mNumAnimMeshes); - for (unsigned int animMeshIndex = 0; animMeshIndex < pMesh->mNumAnimMeshes; animMeshIndex++) { - uniqueAnimatedVertices[animMeshIndex].reserve(pMesh->mNumVertices); - } - } - - // Now check each vertex if it brings something new to the table - for( unsigned int a = 0; a < pMesh->mNumVertices; a++) { - if (usedVertexIndices.find(a) == usedVertexIndices.end()) { - continue; - } - - // collect the vertex data - Vertex v(pMesh,a); - - // collect all vertices that are close enough to the given position - vertexFinder->FindIdenticalPositions( v.position, verticesFound); - unsigned int matchIndex = 0xffffffff; - - // check all unique vertices close to the position if this vertex is already present among them - for( unsigned int b = 0; b < verticesFound.size(); b++) { - const unsigned int vidx = verticesFound[b]; - const unsigned int uidx = replaceIndex[ vidx]; - if( uidx & 0x80000000) - continue; - - const Vertex& uv = uniqueVertices[ uidx]; - - if (!areVerticesEqual(v, uv, complex)) { - continue; - } - - if (hasAnimMeshes) { - // If given vertex is animated, then it has to be preserver 1 to 1 (base mesh and animated mesh require same topology) - // NOTE: not doing this totaly breaks anim meshes as they don't have their own faces (they use pMesh->mFaces) - bool breaksAnimMesh = false; - for (unsigned int animMeshIndex = 0; animMeshIndex < pMesh->mNumAnimMeshes; animMeshIndex++) { - const Vertex& animatedUV = uniqueAnimatedVertices[animMeshIndex][ uidx]; - Vertex aniMeshVertex(pMesh->mAnimMeshes[animMeshIndex], a); - if (!areVerticesEqual(aniMeshVertex, animatedUV, complex)) { - breaksAnimMesh = true; - break; - } - } - if (breaksAnimMesh) { - continue; - } - } - - // we're still here -> this vertex perfectly matches our given vertex - matchIndex = uidx; - break; - } - - // found a replacement vertex among the uniques? - if( matchIndex != 0xffffffff) - { - // store where to found the matching unique vertex - replaceIndex[a] = matchIndex | 0x80000000; - } - else - { - // no unique vertex matches it up to now -> so add it - replaceIndex[a] = (unsigned int)uniqueVertices.size(); - uniqueVertices.push_back( v); - if (hasAnimMeshes) { - for (unsigned int animMeshIndex = 0; animMeshIndex < pMesh->mNumAnimMeshes; animMeshIndex++) { - Vertex aniMeshVertex(pMesh->mAnimMeshes[animMeshIndex], a); - uniqueAnimatedVertices[animMeshIndex].push_back(aniMeshVertex); - } - } - } - } - - if (!DefaultLogger::isNullLogger() && DefaultLogger::get()->getLogSeverity() == Logger::VERBOSE) { - ASSIMP_LOG_VERBOSE_DEBUG( - "Mesh ",meshIndex, - " (", - (pMesh->mName.length ? pMesh->mName.data : "unnamed"), - ") | Verts in: ",pMesh->mNumVertices, - " out: ", - uniqueVertices.size(), - " | ~", - ((pMesh->mNumVertices - uniqueVertices.size()) / (float)pMesh->mNumVertices) * 100.f, - "%" - ); - } - - updateXMeshVertices(pMesh, uniqueVertices); - if (hasAnimMeshes) { - for (unsigned int animMeshIndex = 0; animMeshIndex < pMesh->mNumAnimMeshes; animMeshIndex++) { - updateXMeshVertices(pMesh->mAnimMeshes[animMeshIndex], uniqueAnimatedVertices[animMeshIndex]); - } - } - - // adjust the indices in all faces - for( unsigned int a = 0; a < pMesh->mNumFaces; a++) - { - aiFace& face = pMesh->mFaces[a]; - for( unsigned int b = 0; b < face.mNumIndices; b++) { - face.mIndices[b] = replaceIndex[face.mIndices[b]] & ~0x80000000; - } - } - - // adjust bone vertex weights. - for( int a = 0; a < (int)pMesh->mNumBones; a++) { - aiBone* bone = pMesh->mBones[a]; - std::vector<aiVertexWeight> newWeights; - newWeights.reserve( bone->mNumWeights); - - if (nullptr != bone->mWeights) { - for ( unsigned int b = 0; b < bone->mNumWeights; b++ ) { - const aiVertexWeight& ow = bone->mWeights[ b ]; - // if the vertex is a unique one, translate it - if ( !( replaceIndex[ ow.mVertexId ] & 0x80000000 ) ) { - aiVertexWeight nw; - nw.mVertexId = replaceIndex[ ow.mVertexId ]; - nw.mWeight = ow.mWeight; - newWeights.push_back( nw ); - } - } - } else { - ASSIMP_LOG_ERROR( "X-Export: aiBone shall contain weights, but pointer to them is nullptr." ); - } - - if (newWeights.size() > 0) { - // kill the old and replace them with the translated weights - delete [] bone->mWeights; - bone->mNumWeights = (unsigned int)newWeights.size(); - - bone->mWeights = new aiVertexWeight[bone->mNumWeights]; - memcpy( bone->mWeights, &newWeights[0], bone->mNumWeights * sizeof( aiVertexWeight)); - } - } - return pMesh->mNumVertices; -} - -#endif // !! ASSIMP_BUILD_NO_JOINVERTICES_PROCESS |