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Diffstat (limited to 'libs/assimp/code/PostProcessing/FixNormalsStep.cpp')
| -rw-r--r-- | libs/assimp/code/PostProcessing/FixNormalsStep.cpp | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/libs/assimp/code/PostProcessing/FixNormalsStep.cpp b/libs/assimp/code/PostProcessing/FixNormalsStep.cpp deleted file mode 100644 index be01042..0000000 --- a/libs/assimp/code/PostProcessing/FixNormalsStep.cpp +++ /dev/null @@ -1,184 +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 invert - * all normals in meshes with infacing normals. - */ - -// internal headers -#include "FixNormalsStep.h" -#include <assimp/StringUtils.h> -#include <assimp/DefaultLogger.hpp> -#include <assimp/postprocess.h> -#include <assimp/scene.h> -#include <stdio.h> - - -using namespace Assimp; - - -// ------------------------------------------------------------------------------------------------ -// Constructor to be privately used by Importer -FixInfacingNormalsProcess::FixInfacingNormalsProcess() -{ - // nothing to do here -} - -// ------------------------------------------------------------------------------------------------ -// Destructor, private as well -FixInfacingNormalsProcess::~FixInfacingNormalsProcess() -{ - // nothing to do here -} - -// ------------------------------------------------------------------------------------------------ -// Returns whether the processing step is present in the given flag field. -bool FixInfacingNormalsProcess::IsActive( unsigned int pFlags) const -{ - return (pFlags & aiProcess_FixInfacingNormals) != 0; -} - -// ------------------------------------------------------------------------------------------------ -// Executes the post processing step on the given imported data. -void FixInfacingNormalsProcess::Execute( aiScene* pScene) -{ - ASSIMP_LOG_DEBUG("FixInfacingNormalsProcess begin"); - - bool bHas( false ); - for (unsigned int a = 0; a < pScene->mNumMeshes; ++a) { - if (ProcessMesh(pScene->mMeshes[a], a)) { - bHas = true; - } - } - - if (bHas) { - ASSIMP_LOG_DEBUG("FixInfacingNormalsProcess finished. Found issues."); - } else { - ASSIMP_LOG_DEBUG("FixInfacingNormalsProcess finished. No changes to the scene."); - } -} - -// ------------------------------------------------------------------------------------------------ -// Apply the step to the mesh -bool FixInfacingNormalsProcess::ProcessMesh( aiMesh* pcMesh, unsigned int index) -{ - ai_assert(nullptr != pcMesh); - - // Nothing to do if there are no model normals - if (!pcMesh->HasNormals()) { - return false; - } - - // Compute the bounding box of both the model vertices + normals and - // the unmodified model vertices. Then check whether the first BB - // is smaller than the second. In this case we can assume that the - // normals need to be flipped, although there are a few special cases .. - // convex, concave, planar models ... - - aiVector3D vMin0 (1e10f,1e10f,1e10f); - aiVector3D vMin1 (1e10f,1e10f,1e10f); - aiVector3D vMax0 (-1e10f,-1e10f,-1e10f); - aiVector3D vMax1 (-1e10f,-1e10f,-1e10f); - - for (unsigned int i = 0; i < pcMesh->mNumVertices;++i) - { - vMin1.x = std::min(vMin1.x,pcMesh->mVertices[i].x); - vMin1.y = std::min(vMin1.y,pcMesh->mVertices[i].y); - vMin1.z = std::min(vMin1.z,pcMesh->mVertices[i].z); - - vMax1.x = std::max(vMax1.x,pcMesh->mVertices[i].x); - vMax1.y = std::max(vMax1.y,pcMesh->mVertices[i].y); - vMax1.z = std::max(vMax1.z,pcMesh->mVertices[i].z); - - const aiVector3D vWithNormal = pcMesh->mVertices[i] + pcMesh->mNormals[i]; - - vMin0.x = std::min(vMin0.x,vWithNormal.x); - vMin0.y = std::min(vMin0.y,vWithNormal.y); - vMin0.z = std::min(vMin0.z,vWithNormal.z); - - vMax0.x = std::max(vMax0.x,vWithNormal.x); - vMax0.y = std::max(vMax0.y,vWithNormal.y); - vMax0.z = std::max(vMax0.z,vWithNormal.z); - } - - const float fDelta0_x = (vMax0.x - vMin0.x); - const float fDelta0_y = (vMax0.y - vMin0.y); - const float fDelta0_z = (vMax0.z - vMin0.z); - - const float fDelta1_x = (vMax1.x - vMin1.x); - const float fDelta1_y = (vMax1.y - vMin1.y); - const float fDelta1_z = (vMax1.z - vMin1.z); - - // Check whether the boxes are overlapping - if ((fDelta0_x > 0.0f) != (fDelta1_x > 0.0f))return false; - if ((fDelta0_y > 0.0f) != (fDelta1_y > 0.0f))return false; - if ((fDelta0_z > 0.0f) != (fDelta1_z > 0.0f))return false; - - // Check whether this is a planar surface - const float fDelta1_yz = fDelta1_y * fDelta1_z; - - if (fDelta1_x < 0.05f * std::sqrt( fDelta1_yz ))return false; - if (fDelta1_y < 0.05f * std::sqrt( fDelta1_z * fDelta1_x ))return false; - if (fDelta1_z < 0.05f * std::sqrt( fDelta1_y * fDelta1_x ))return false; - - // now compare the volumes of the bounding boxes - if (std::fabs(fDelta0_x * fDelta0_y * fDelta0_z) < std::fabs(fDelta1_x * fDelta1_yz)) { - if (!DefaultLogger::isNullLogger()) { - ASSIMP_LOG_INFO("Mesh ", index, ": Normals are facing inwards (or the mesh is planar)", index); - } - - // Invert normals - for (unsigned int i = 0; i < pcMesh->mNumVertices;++i) - pcMesh->mNormals[i] *= -1.0f; - - // ... and flip faces - for (unsigned int i = 0; i < pcMesh->mNumFaces;++i) - { - aiFace& face = pcMesh->mFaces[i]; - for( unsigned int b = 0; b < face.mNumIndices / 2; b++) - std::swap( face.mIndices[b], face.mIndices[ face.mNumIndices - 1 - b]); - } - return true; - } - return false; -} |