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-rw-r--r--src/mesh/assimp-master/code/PostProcessing/FindDegenerates.cpp297
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diff --git a/src/mesh/assimp-master/code/PostProcessing/FindDegenerates.cpp b/src/mesh/assimp-master/code/PostProcessing/FindDegenerates.cpp
deleted file mode 100644
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--- a/src/mesh/assimp-master/code/PostProcessing/FindDegenerates.cpp
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@@ -1,297 +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 FindDegenerates.cpp
- * @brief Implementation of the FindDegenerates post-process step.
-*/
-
-#include "ProcessHelper.h"
-#include "FindDegenerates.h"
-
-#include <assimp/Exceptional.h>
-
-#include <unordered_map>
-
-using namespace Assimp;
-
-// Correct node indices to meshes and remove references to deleted mesh
-static void updateSceneGraph(aiNode* pNode, const std::unordered_map<unsigned int, unsigned int>& meshMap);
-
-// ------------------------------------------------------------------------------------------------
-// Constructor to be privately used by Importer
-FindDegeneratesProcess::FindDegeneratesProcess() :
- mConfigRemoveDegenerates( false ),
- mConfigCheckAreaOfTriangle( false ){
- // empty
-}
-
-// ------------------------------------------------------------------------------------------------
-// Destructor, private as well
-FindDegeneratesProcess::~FindDegeneratesProcess() {
- // nothing to do here
-}
-
-// ------------------------------------------------------------------------------------------------
-// Returns whether the processing step is present in the given flag field.
-bool FindDegeneratesProcess::IsActive( unsigned int pFlags) const {
- return 0 != (pFlags & aiProcess_FindDegenerates);
-}
-
-// ------------------------------------------------------------------------------------------------
-// Setup import configuration
-void FindDegeneratesProcess::SetupProperties(const Importer* pImp) {
- // Get the current value of AI_CONFIG_PP_FD_REMOVE
- mConfigRemoveDegenerates = (0 != pImp->GetPropertyInteger(AI_CONFIG_PP_FD_REMOVE,0));
- mConfigCheckAreaOfTriangle = ( 0 != pImp->GetPropertyInteger(AI_CONFIG_PP_FD_CHECKAREA) );
-}
-
-// ------------------------------------------------------------------------------------------------
-// Executes the post processing step on the given imported data.
-void FindDegeneratesProcess::Execute( aiScene* pScene) {
- ASSIMP_LOG_DEBUG("FindDegeneratesProcess begin");
- if ( nullptr == pScene) {
- return;
- }
-
- std::unordered_map<unsigned int, unsigned int> meshMap;
- meshMap.reserve(pScene->mNumMeshes);
-
- const unsigned int originalNumMeshes = pScene->mNumMeshes;
- unsigned int targetIndex = 0;
- for (unsigned int i = 0; i < pScene->mNumMeshes; ++i) {
- // Do not process point cloud, ExecuteOnMesh works only with faces data
- if ((pScene->mMeshes[i]->mPrimitiveTypes != aiPrimitiveType::aiPrimitiveType_POINT) && ExecuteOnMesh(pScene->mMeshes[i])) {
- delete pScene->mMeshes[i];
- // Not strictly required, but clean:
- pScene->mMeshes[i] = nullptr;
- } else {
- meshMap[i] = targetIndex;
- pScene->mMeshes[targetIndex] = pScene->mMeshes[i];
- ++targetIndex;
- }
- }
- pScene->mNumMeshes = targetIndex;
-
- if (meshMap.size() < originalNumMeshes) {
- updateSceneGraph(pScene->mRootNode, meshMap);
- }
-
- ASSIMP_LOG_DEBUG("FindDegeneratesProcess finished");
-}
-
-static void updateSceneGraph(aiNode* pNode, const std::unordered_map<unsigned int, unsigned int>& meshMap) {
- unsigned int targetIndex = 0;
- for (unsigned i = 0; i < pNode->mNumMeshes; ++i) {
- const unsigned int sourceMeshIndex = pNode->mMeshes[i];
- auto it = meshMap.find(sourceMeshIndex);
- if (it != meshMap.end()) {
- pNode->mMeshes[targetIndex] = it->second;
- ++targetIndex;
- }
- }
- pNode->mNumMeshes = targetIndex;
- //recurse to all children
- for (unsigned i = 0; i < pNode->mNumChildren; ++i) {
- updateSceneGraph(pNode->mChildren[i], meshMap);
- }
-}
-
-static ai_real heron( ai_real a, ai_real b, ai_real c ) {
- ai_real s = (a + b + c) / 2;
- ai_real area = pow((s * ( s - a ) * ( s - b ) * ( s - c ) ), (ai_real)0.5 );
- return area;
-}
-
-static ai_real distance3D( const aiVector3D &vA, aiVector3D &vB ) {
- const ai_real lx = ( vB.x - vA.x );
- const ai_real ly = ( vB.y - vA.y );
- const ai_real lz = ( vB.z - vA.z );
- ai_real a = lx*lx + ly*ly + lz*lz;
- ai_real d = pow( a, (ai_real)0.5 );
-
- return d;
-}
-
-static ai_real calculateAreaOfTriangle( const aiFace& face, aiMesh* mesh ) {
- ai_real area = 0;
-
- aiVector3D vA( mesh->mVertices[ face.mIndices[ 0 ] ] );
- aiVector3D vB( mesh->mVertices[ face.mIndices[ 1 ] ] );
- aiVector3D vC( mesh->mVertices[ face.mIndices[ 2 ] ] );
-
- ai_real a( distance3D( vA, vB ) );
- ai_real b( distance3D( vB, vC ) );
- ai_real c( distance3D( vC, vA ) );
- area = heron( a, b, c );
-
- return area;
-}
-
-// ------------------------------------------------------------------------------------------------
-// Executes the post processing step on the given imported mesh
-bool FindDegeneratesProcess::ExecuteOnMesh( aiMesh* mesh) {
- mesh->mPrimitiveTypes = 0;
-
- std::vector<bool> remove_me;
- if (mConfigRemoveDegenerates) {
- remove_me.resize( mesh->mNumFaces, false );
- }
-
- unsigned int deg = 0, limit;
- for ( unsigned int a = 0; a < mesh->mNumFaces; ++a ) {
- aiFace& face = mesh->mFaces[a];
- bool first = true;
-
- // check whether the face contains degenerated entries
- for (unsigned int i = 0; i < face.mNumIndices; ++i) {
- // Polygons with more than 4 points are allowed to have double points, that is
- // simulating polygons with holes just with concave polygons. However,
- // double points may not come directly after another.
- limit = face.mNumIndices;
- if (face.mNumIndices > 4) {
- limit = std::min( limit, i+2 );
- }
-
- for (unsigned int t = i+1; t < limit; ++t) {
- if (mesh->mVertices[face.mIndices[ i ] ] == mesh->mVertices[ face.mIndices[ t ] ]) {
- // we have found a matching vertex position
- // remove the corresponding index from the array
- --face.mNumIndices;
- --limit;
- for (unsigned int m = t; m < face.mNumIndices; ++m) {
- face.mIndices[ m ] = face.mIndices[ m+1 ];
- }
- --t;
-
- // NOTE: we set the removed vertex index to an unique value
- // to make sure the developer gets notified when his
- // application attempts to access this data.
- face.mIndices[ face.mNumIndices ] = 0xdeadbeef;
-
- if(first) {
- ++deg;
- first = false;
- }
-
- if ( mConfigRemoveDegenerates ) {
- remove_me[ a ] = true;
- goto evil_jump_outside; // hrhrhrh ... yeah, this rocks baby!
- }
- }
- }
-
- if ( mConfigCheckAreaOfTriangle ) {
- if ( face.mNumIndices == 3 ) {
- ai_real area = calculateAreaOfTriangle( face, mesh );
- if (area < ai_epsilon) {
- if ( mConfigRemoveDegenerates ) {
- remove_me[ a ] = true;
- ++deg;
- goto evil_jump_outside;
- }
-
- // todo: check for index which is corrupt.
- }
- }
- }
- }
-
- // We need to update the primitive flags array of the mesh.
- switch (face.mNumIndices)
- {
- case 1u:
- mesh->mPrimitiveTypes |= aiPrimitiveType_POINT;
- break;
- case 2u:
- mesh->mPrimitiveTypes |= aiPrimitiveType_LINE;
- break;
- case 3u:
- mesh->mPrimitiveTypes |= aiPrimitiveType_TRIANGLE;
- break;
- default:
- mesh->mPrimitiveTypes |= aiPrimitiveType_POLYGON;
- break;
- };
-evil_jump_outside:
- continue;
- }
-
- // If AI_CONFIG_PP_FD_REMOVE is true, remove degenerated faces from the import
- if (mConfigRemoveDegenerates && deg) {
- unsigned int n = 0;
- for (unsigned int a = 0; a < mesh->mNumFaces; ++a)
- {
- aiFace& face_src = mesh->mFaces[a];
- if (!remove_me[a]) {
- aiFace& face_dest = mesh->mFaces[n++];
-
- // Do a manual copy, keep the index array
- face_dest.mNumIndices = face_src.mNumIndices;
- face_dest.mIndices = face_src.mIndices;
-
- if (&face_src != &face_dest) {
- // clear source
- face_src.mNumIndices = 0;
- face_src.mIndices = nullptr;
- }
- }
- else {
- // Otherwise delete it if we don't need this face
- delete[] face_src.mIndices;
- face_src.mIndices = nullptr;
- face_src.mNumIndices = 0;
- }
- }
- // Just leave the rest of the array unreferenced, we don't care for now
- mesh->mNumFaces = n;
- if (!mesh->mNumFaces) {
- //The whole mesh consists of degenerated faces
- //signal upward, that this mesh should be deleted.
- ASSIMP_LOG_VERBOSE_DEBUG("FindDegeneratesProcess removed a mesh full of degenerated primitives");
- return true;
- }
- }
-
- if (deg && !DefaultLogger::isNullLogger()) {
- ASSIMP_LOG_WARN( "Found ", deg, " degenerated primitives");
- }
- return false;
-}
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