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Merge pull request #2350 from appsforlife/issue-2349 

Obj: we can still import partially incorrect files
pull/2353/head^2
Kim Kulling 2019-02-27 18:50:42 +01:00 committed by GitHub
parent d5a0a21f8c 7b01ff6b8d
commit a23aa70575
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 44 additions and 9 deletions
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33
code/ObjFileImporter.cpp
View File

@ -447,6 +447,7 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
}
// Copy vertices, normals and textures into aiMesh instance
bool normalsok = true, uvok = true;
unsigned int newIndex = 0, outIndex = 0;
for ( size_t index=0; index < pObjMesh->m_Faces.size(); index++ ) {
// Get source face
@ -466,13 +467,17 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
pMesh->mVertices[ newIndex ] = pModel->m_Vertices[ vertex ];
// Copy all normals
if ( !pModel->m_Normals.empty() && vertexIndex < pSourceFace->m_normals.size()) {
if ( normalsok && !pModel->m_Normals.empty() && vertexIndex < pSourceFace->m_normals.size()) {
const unsigned int normal = pSourceFace->m_normals.at( vertexIndex );
if ( normal >= pModel->m_Normals.size() ) {
throw DeadlyImportError( "OBJ: vertex normal index out of range" );
if ( normal >= pModel->m_Normals.size() )
{
normalsok = false;
}
else
{
pMesh->mNormals[ newIndex ] = pModel->m_Normals[ normal ];
}
}
// Copy all vertex colors
if ( !pModel->m_VertexColors.empty())
@ -482,16 +487,20 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
}
// Copy all texture coordinates
if ( !pModel->m_TextureCoord.empty() && vertexIndex < pSourceFace->m_texturCoords.size())
if ( uvok && !pModel->m_TextureCoord.empty() && vertexIndex < pSourceFace->m_texturCoords.size())
{
const unsigned int tex = pSourceFace->m_texturCoords.at( vertexIndex );
if ( tex >= pModel->m_TextureCoord.size() )
throw DeadlyImportError("OBJ: texture coordinate index out of range");
{
uvok = false;
}
else
{
const aiVector3D &coord3d = pModel->m_TextureCoord[ tex ];
pMesh->mTextureCoords[ 0 ][ newIndex ] = aiVector3D( coord3d.x, coord3d.y, coord3d.z );
}
}
// Get destination face
aiFace *pDestFace = &pMesh->mFaces[ outIndex ];
@ -534,6 +543,18 @@ void ObjFileImporter::createVertexArray(const ObjFile::Model* pModel,
++newIndex;
}
}
if (!normalsok)
{
delete [] pMesh->mNormals;
pMesh->mNormals = nullptr;
}
if (!uvok)
{
delete [] pMesh->mTextureCoords[0];
pMesh->mTextureCoords[0] = nullptr;
}
}
// ------------------------------------------------------------------------------------------------

14
test/unit/utObjImportExport.cpp
View File

@ -377,6 +377,20 @@ TEST_F(utObjImportExport, 0based_array_Test) {
EXPECT_EQ(nullptr, scene);
}
TEST_F(utObjImportExport, invalid_normals_uvs) {
static const char *ObjModel =
"v -0.500000 0.000000 0.400000\n"
"v -0.500000 0.000000 -0.800000\n"
"v -0.500000 1.000000 -0.800000\n"
"vt 0 0\n"
"vn 0 1 0\n"
"f 1/1/1 1/1/1 2/2/2\nB";
Assimp::Importer myImporter;
const aiScene *scene = myImporter.ReadFileFromMemory(ObjModel, strlen(ObjModel), 0);
EXPECT_NE(nullptr, scene);
}
TEST_F( utObjImportExport, mtllib_after_g ) {
::Assimp::Importer importer;
const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/cube_mtllib_after_g.obj", aiProcess_ValidateDataStructure );