From c6eda6729677ae86217248701cd0b24dead4d728 Mon Sep 17 00:00:00 2001 From: Sebastian Maisch Date: Tue, 29 May 2018 13:01:11 +0200 Subject: [PATCH] Changed assimp to force regeneration of normals. --- code/GenFaceNormalsProcess.cpp | 14 +++++++++++++- code/GenVertexNormalsProcess.cpp | 6 ++++-- 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/code/GenFaceNormalsProcess.cpp b/code/GenFaceNormalsProcess.cpp index be726302c..6c222e154 100644 --- a/code/GenFaceNormalsProcess.cpp +++ b/code/GenFaceNormalsProcess.cpp @@ -106,7 +106,8 @@ void GenFaceNormalsProcess::Execute( aiScene* pScene) bool GenFaceNormalsProcess::GenMeshFaceNormals (aiMesh* pMesh) { if (NULL != pMesh->mNormals) { - return false; + // return false; + delete[] pMesh->mNormals; } // If the mesh consists of lines and/or points but not of @@ -135,8 +136,19 @@ bool GenFaceNormalsProcess::GenMeshFaceNormals (aiMesh* pMesh) const aiVector3D* pV1 = &pMesh->mVertices[face.mIndices[0]]; const aiVector3D* pV2 = &pMesh->mVertices[face.mIndices[1]]; const aiVector3D* pV3 = &pMesh->mVertices[face.mIndices[face.mNumIndices-1]]; + + auto pV12 = *pV2 - *pV1; + auto pV31 = *pV3 - *pV1; + const aiVector3D vNor = ((*pV2 - *pV1) ^ (*pV3 - *pV1)).Normalize(); + if (std::isnan(vNor.x) || std::isnan(vNor.y) || std::isnan(vNor.z)) { + for (unsigned int i = 0; i < face.mNumIndices; ++i) { + pMesh->mNormals[face.mIndices[i]] = aiVector3D(0.0f, 0.0f, 0.0f); + } + continue; + } + for (unsigned int i = 0;i < face.mNumIndices;++i) { pMesh->mNormals[face.mIndices[i]] = vNor; } diff --git a/code/GenVertexNormalsProcess.cpp b/code/GenVertexNormalsProcess.cpp index f746f3776..e0783b0a2 100644 --- a/code/GenVertexNormalsProcess.cpp +++ b/code/GenVertexNormalsProcess.cpp @@ -112,8 +112,10 @@ void GenVertexNormalsProcess::Execute( aiScene* pScene) // Executes the post processing step on the given imported data. bool GenVertexNormalsProcess::GenMeshVertexNormals (aiMesh* pMesh, unsigned int meshIndex) { - if (NULL != pMesh->mNormals) - return false; + if (NULL != pMesh->mNormals) { + delete[] pMesh->mNormals; + } +// return false; // If the mesh consists of lines and/or points but not of // triangles or higher-order polygons the normal vectors