mirror of
https://github.com/bulletphysics/bullet3
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89 lines
3.4 KiB
Markdown
89 lines
3.4 KiB
Markdown
tinyobjloader
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=============
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http://syoyo.github.io/tinyobjloader/
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Tiny but poweful single file wavefront obj loader written in C++. No dependency except for C++ STL. It can parse 10M over polygons with moderate memory and time.
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Good for embedding .obj loader to your (global illumination) renderer ;-)
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Example
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-------
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tinyobjloader can successfully load 6M triangles Rungholt scene.
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http://graphics.cs.williams.edu/data/meshes.xml
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Features
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--------
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* Group
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* Vertex
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* Texcoord
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* Normal
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* Material
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* Unknown material attributes are treated as key-value.
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Notes
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-----
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Polygon is converted into triangle.
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License
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-------
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Licensed under 2 clause BSD.
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Usage
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-----
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std::string inputfile = "cornell_box.obj";
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std::vector<tinyobj::shape_t> shapes;
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std::string err = tinyobj::LoadObj(shapes, inputfile.c_str());
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if (!err.empty()) {
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std::cerr << err << std::endl;
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exit(1);
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}
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std::cout << "# of shapes : " << shapes.size() << std::endl;
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for (size_t i = 0; i < shapes.size(); i++) {
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printf("shape[%ld].name = %s\n", i, shapes[i].name.c_str());
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printf("shape[%ld].indices: %ld\n", i, shapes[i].mesh.indices.size());
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assert((shapes[i].mesh.indices.size() % 3) == 0);
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for (size_t f = 0; f < shapes[i].mesh.indices.size(); f++) {
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printf(" idx[%ld] = %d\n", f, shapes[i].mesh.indices[f]);
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}
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printf("shape[%ld].vertices: %ld\n", i, shapes[i].mesh.positions.size());
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assert((shapes[i].mesh.positions.size() % 3) == 0);
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for (size_t v = 0; v < shapes[i].mesh.positions.size() / 3; v++) {
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printf(" v[%ld] = (%f, %f, %f)\n", v,
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shapes[i].mesh.positions[3*v+0],
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shapes[i].mesh.positions[3*v+1],
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shapes[i].mesh.positions[3*v+2]);
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}
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printf("shape[%ld].material.name = %s\n", i, shapes[i].material.name.c_str());
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printf(" material.Ka = (%f, %f ,%f)\n", shapes[i].material.ambient[0], shapes[i].material.ambient[1], shapes[i].material.ambient[2]);
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printf(" material.Kd = (%f, %f ,%f)\n", shapes[i].material.diffuse[0], shapes[i].material.diffuse[1], shapes[i].material.diffuse[2]);
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printf(" material.Ks = (%f, %f ,%f)\n", shapes[i].material.specular[0], shapes[i].material.specular[1], shapes[i].material.specular[2]);
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printf(" material.Tr = (%f, %f ,%f)\n", shapes[i].material.transmittance[0], shapes[i].material.transmittance[1], shapes[i].material.transmittance[2]);
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printf(" material.Ke = (%f, %f ,%f)\n", shapes[i].material.emission[0], shapes[i].material.emission[1], shapes[i].material.emission[2]);
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printf(" material.Ns = %f\n", shapes[i].material.shininess);
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printf(" material.map_Ka = %s\n", shapes[i].material.ambient_texname.c_str());
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printf(" material.map_Kd = %s\n", shapes[i].material.diffuse_texname.c_str());
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printf(" material.map_Ks = %s\n", shapes[i].material.specular_texname.c_str());
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printf(" material.map_Ns = %s\n", shapes[i].material.normal_texname.c_str());
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std::map<std::string, std::string>::iterator it(shapes[i].material.unknown_parameter.begin());
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std::map<std::string, std::string>::iterator itEnd(shapes[i].material.unknown_parameter.end());
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for (; it != itEnd; it++) {
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printf(" material.%s = %s\n", it->first.c_str(), it->second.c_str());
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}
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printf("\n");
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}
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