Scarfski/assimp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add BOM skip and fix mtl parsing (#6253)

Browse Source 
* Add BOM skip and fix mtl parsing
* Remove old code
* Fix #5635
* Add all attributes to ObjFileData
---------

Co-authored-by: Kim Kulling <kimkulling@users.noreply.github.com>
This commit is contained in:
Paul Bauriegel
2025-09-22 11:20:24 +02:00
committed by GitHub
parent 489c8d565b
commit 709fe3c3d0
4 changed files with 150 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

122
code/AssetLib/Obj/ObjFileMtlImporter.cpp
View File

@@ -235,24 +235,64 @@ void ObjFileMtlImporter::load() {
++m_DataIt;
if (m_pModel->mCurrentMaterial != nullptr)
getFloatValue(m_pModel->mCurrentMaterial->clearcoat_roughness);
} else {
} else if (*m_DataIt == 't') {
++m_DataIt;
if (m_pModel->mCurrentMaterial != nullptr)
getFloatValue(m_pModel->mCurrentMaterial->clearcoat_thickness);
} else {
if (m_pModel->mCurrentMaterial != nullptr)
getFloatValue(m_pModel->mCurrentMaterial->clearcoat);
}
break;
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
}
break;
case 'm': // Texture or metallic
{
// Save start of token (after 'm')
auto tokenStart = m_DataIt; // points to 'm'
auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd); // move iterator to end of token
std::string keyword(tokenStart, tokenEnd);
m_DataIt = tokenEnd; // advance iterator
if (keyword.compare(0, 3, "map") == 0) {
// starts with "map", treat as texture map
m_DataIt = tokenStart;
getTexture();
} else if (keyword == "metallic" || keyword == "metal" || keyword == "metalness") {
// parse metallic float value instead of texture
getFloatIfMaterialValid(&ObjFile::Material::metallic);
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'm': // Texture
case 'b': // quick'n'dirty - for 'bump' sections
case 'r': // quick'n'dirty - for 'refl' sections
{
getTexture();
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'r': // refl (map) or roughness (float)
{
auto tokenStart = m_DataIt; // points to 'r'
auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
std::string keyword(tokenStart, tokenEnd);
m_DataIt = tokenEnd;
if (keyword == "roughness" || keyword == "rough") {
getFloatIfMaterialValid(&ObjFile::Material::roughness);
} else if (keyword == "refl" || keyword == "reflection") {
m_DataIt = tokenStart;
getTexture();
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'i': // Illumination model
{
m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
@@ -261,11 +301,60 @@ void ObjFileMtlImporter::load() {
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'a': // Anisotropy
{
++m_DataIt;
if (m_pModel->mCurrentMaterial != nullptr)
getFloatValue(m_pModel->mCurrentMaterial->anisotropy);
case 'a': {
auto tokenStart = m_DataIt;
auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
std::string keyword(tokenStart, tokenEnd);
m_DataIt = tokenEnd;
if (keyword == "aniso" || keyword == "anisotropy") {
getFloatIfMaterialValid(&ObjFile::Material::anisotropy);
} else if (keyword == "ao") {
getFloatIfMaterialValid(&ObjFile::Material::ambient_occlusion);
} else if (keyword == "anisor" || ai_stdStrToLower(keyword) == "anisotropicrotation") {
getFloatIfMaterialValid(&ObjFile::Material::anisotropy_rotation);
} else {
ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 's': {
auto tokenStart = m_DataIt;
auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
std::string keyword(tokenStart, tokenEnd);
m_DataIt = tokenEnd;
if (keyword == "subsurface" || keyword == "scattering") {
getFloatIfMaterialValid(&ObjFile::Material::subsurface_scattering);
} else if (ai_stdStrToLower(keyword) == "speculartint") {
getFloatIfMaterialValid(&ObjFile::Material::specular_tint);
} else if (keyword == "sheen") {
getFloatIfMaterialValid(&ObjFile::Material::sheen_grazing);
} else if (ai_stdStrToLower(keyword) == "sheentint") {
getFloatIfMaterialValid(&ObjFile::Material::sheen_tint);
} else {
ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'c': {
auto tokenStart = m_DataIt;
auto tokenEnd = getNextToken(m_DataIt, m_DataItEnd);
std::string keyword(tokenStart, tokenEnd);
m_DataIt = tokenEnd;
if (ai_stdStrToLower(keyword) == "clearcoat") {
getFloatIfMaterialValid(&ObjFile::Material::clearcoat);
} else if (ai_stdStrToLower(keyword) == "clearcoatgloss") {
getFloatIfMaterialValid(&ObjFile::Material::clearcoat_gloss);
} else {
ASSIMP_LOG_WARN("Unhandled keyword: ", keyword );
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
@@ -332,6 +421,23 @@ void ObjFileMtlImporter::getFloatValue(Maybe<ai_real> &value) {
value = Maybe<ai_real>();
}
// -------------------------------------------------------------------
// Writes a loaded single float value if material not null
void ObjFileMtlImporter::getFloatIfMaterialValid(ai_real ObjFile::Material::*member) {
if (m_pModel != nullptr && m_pModel->mCurrentMaterial != nullptr) {
// This will call getFloatValue(ai_real&)
getFloatValue(m_pModel->mCurrentMaterial->*member);
}
}
// -------------------------------------------------------------------
void ObjFileMtlImporter::getFloatIfMaterialValid(Maybe<ai_real> ObjFile::Material::*member) {
// It can directly access `m_pModel` because it's part of the class
if (m_pModel != nullptr && m_pModel->mCurrentMaterial != nullptr) {
getFloatValue(m_pModel->mCurrentMaterial->*member);
}
}
// -------------------------------------------------------------------
// Creates a material from loaded data.
void ObjFileMtlImporter::createMaterial() {