Method loadObj

core/3d/Bundle3D.cpp:205–335

}

bool Bundle3D::loadObj(MeshDatas& meshdatas,
                       MaterialDatas& materialdatas,
                       NodeDatas& nodedatas,
                       std::string_view fullPath,
                       const char* mtl_basepath)
{
    meshdatas.resetData();
    materialdatas.resetData();
    nodedatas.resetData();

    std::string mtlPath = "";
    if (mtl_basepath)
        mtlPath = mtl_basepath;
    else
        mtlPath = fullPath.substr(0, fullPath.find_last_of("\\/") + 1);

    std::vector<tinyobj::shape_t> shapes;
    std::vector<tinyobj::material_t> materials;
    auto ret = tinyobj::LoadObj(shapes, materials, fullPath.data(), mtlPath.c_str());
    if (ret.empty())
    {
        // fill data
        // convert material
        int i = 0;
        char buf[20];
        std::string dir;
        auto last       = fullPath.rfind('/');
        if (last != std::string::npos)
            dir = fullPath.substr(0, last + 1);
        for (auto&& material : materials)
        {
            NMaterialData materialdata;

            NTextureData tex;
            tex.filename = material.diffuse_texname.empty() ? material.diffuse_texname : dir + material.diffuse_texname;
            tex.type     = NTextureData::Usage::Diffuse;
            tex.wrapS    = backend::SamplerAddressMode::CLAMP_TO_EDGE;
            tex.wrapT    = backend::SamplerAddressMode::CLAMP_TO_EDGE;

            auto dataId = fmt::format_to_z(buf, "{}", ++i);
            materialdata.textures.emplace_back(tex);
            materialdata.id = dataId;
            material.name   = dataId;
            materialdatas.materials.emplace_back(materialdata);
        }

        // convert mesh
        i = 0;
        for (auto&& shape : shapes)
        {
            auto mesh          = shape.mesh;
            MeshData* meshdata = new MeshData();
            MeshVertexAttrib attrib;
            attrib.type = parseGLDataType("GL_FLOAT", 3);

            if (mesh.positions.size())
            {
                attrib.vertexAttrib = shaderinfos::VertexKey::VERTEX_ATTRIB_POSITION;