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// python2/3 module for tinyobjloader
//
// usage:
// import tinyobjloader as tol
// model = tol.LoadObj(name)
// print(model["shapes"])
// print(model["materials"]
// note:
// `shape.mesh.index_t` is represented as flattened array: (vertex_index, normal_index, texcoord_index) * num_faces
#include <Python.h>
#include <vector>
#include "../tiny_obj_loader.h"
typedef std::vector<double> vectd;
typedef std::vector<int> vecti;
PyObject* pyTupleFromfloat3(float array[3]) {
int i;
PyObject* tuple = PyTuple_New(3);
for (i = 0; i <= 2; i++) {
PyTuple_SetItem(tuple, i, PyFloat_FromDouble(array[i]));
}
return tuple;
}
extern "C" {
static PyObject* pyLoadObj(PyObject* self, PyObject* args) {
PyObject *rtndict, *pyshapes, *pymaterials, *pymaterial_indices, *attribobj, *current, *meshobj;
char const* current_name;
char const* filename;
vectd vect;
std::vector<tinyobj::index_t> indices;
std::vector<unsigned char> face_verts;
tinyobj::attrib_t attrib;
std::vector<tinyobj::shape_t> shapes;
std::vector<tinyobj::material_t> materials;
if (!PyArg_ParseTuple(args, "s", &filename)) return NULL;
std::string err;
tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename);
pyshapes = PyDict_New();
pymaterials = PyDict_New();
pymaterial_indices = PyList_New(0);
rtndict = PyDict_New();
attribobj = PyDict_New();
for (int i = 0; i <= 2; i++) {
current = PyList_New(0);
switch (i) {
case 0:
current_name = "vertices";
vect = vectd(attrib.vertices.begin(), attrib.vertices.end());
break;
case 1:
current_name = "normals";
vect = vectd(attrib.normals.begin(), attrib.normals.end());
break;
case 2:
current_name = "texcoords";
vect = vectd(attrib.texcoords.begin(), attrib.texcoords.end());
break;
}
for (vectd::iterator it = vect.begin(); it != vect.end(); it++) {
PyList_Insert(current, it - vect.begin(), PyFloat_FromDouble(*it));
}
PyDict_SetItemString(attribobj, current_name, current);
}
for (std::vector<tinyobj::shape_t>::iterator shape = shapes.begin();
shape != shapes.end(); shape++) {
meshobj = PyDict_New();
tinyobj::mesh_t cm = (*shape).mesh;
{
current = PyList_New(0);
for (size_t i = 0; i < cm.indices.size(); i++) {
// Flatten index array: v_idx, vn_idx, vt_idx, v_idx, vn_idx, vt_idx,
// ...
PyList_Insert(current, 3 * i + 0,
PyLong_FromLong(cm.indices[i].vertex_index));
PyList_Insert(current, 3 * i + 1,
PyLong_FromLong(cm.indices[i].normal_index));
PyList_Insert(current, 3 * i + 2,
PyLong_FromLong(cm.indices[i].texcoord_index));
}
PyDict_SetItemString(meshobj, "indices", current);
}
{
current = PyList_New(0);
for (size_t i = 0; i < cm.num_face_vertices.size(); i++) {
// Widen data type to long.
PyList_Insert(current, i, PyLong_FromLong(cm.num_face_vertices[i]));
}
PyDict_SetItemString(meshobj, "num_face_vertices", current);
}
{
current = PyList_New(0);
for (size_t i = 0; i < cm.material_ids.size(); i++) {
PyList_Insert(current, i, PyLong_FromLong(cm.material_ids[i]));
}
PyDict_SetItemString(meshobj, "material_ids", current);
}
PyDict_SetItemString(pyshapes, (*shape).name.c_str(), meshobj);
}
for (std::vector<tinyobj::material_t>::iterator mat = materials.begin();
mat != materials.end(); mat++) {
PyObject* matobj = PyDict_New();
PyObject* unknown_parameter = PyDict_New();
for (std::map<std::string, std::string>::iterator p =
mat->unknown_parameter.begin();
p != mat->unknown_parameter.end(); ++p) {
PyDict_SetItemString(unknown_parameter, p->first.c_str(),
PyUnicode_FromString(p->second.c_str()));
}
PyDict_SetItemString(matobj, "shininess",
PyFloat_FromDouble(mat->shininess));
PyDict_SetItemString(matobj, "ior", PyFloat_FromDouble(mat->ior));
PyDict_SetItemString(matobj, "dissolve",
PyFloat_FromDouble(mat->dissolve));
PyDict_SetItemString(matobj, "illum", PyLong_FromLong(mat->illum));
PyDict_SetItemString(matobj, "ambient_texname",
PyUnicode_FromString(mat->ambient_texname.c_str()));
PyDict_SetItemString(matobj, "diffuse_texname",
PyUnicode_FromString(mat->diffuse_texname.c_str()));
PyDict_SetItemString(matobj, "specular_texname",
PyUnicode_FromString(mat->specular_texname.c_str()));
PyDict_SetItemString(
matobj, "specular_highlight_texname",
PyUnicode_FromString(mat->specular_highlight_texname.c_str()));
PyDict_SetItemString(matobj, "bump_texname",
PyUnicode_FromString(mat->bump_texname.c_str()));
PyDict_SetItemString(
matobj, "displacement_texname",
PyUnicode_FromString(mat->displacement_texname.c_str()));
PyDict_SetItemString(matobj, "alpha_texname",
PyUnicode_FromString(mat->alpha_texname.c_str()));
PyDict_SetItemString(matobj, "ambient", pyTupleFromfloat3(mat->ambient));
PyDict_SetItemString(matobj, "diffuse", pyTupleFromfloat3(mat->diffuse));
PyDict_SetItemString(matobj, "specular",
pyTupleFromfloat3(mat->specular));
PyDict_SetItemString(matobj, "transmittance",
pyTupleFromfloat3(mat->transmittance));
PyDict_SetItemString(matobj, "emission",
pyTupleFromfloat3(mat->emission));
PyDict_SetItemString(matobj, "unknown_parameter", unknown_parameter);
PyDict_SetItemString(pymaterials, mat->name.c_str(), matobj);
PyList_Append(pymaterial_indices, PyUnicode_FromString(mat->name.c_str()));
}
PyDict_SetItemString(rtndict, "shapes", pyshapes);
PyDict_SetItemString(rtndict, "materials", pymaterials);
PyDict_SetItemString(rtndict, "material_indices", pymaterial_indices);
PyDict_SetItemString(rtndict, "attribs", attribobj);
return rtndict;
}
static PyMethodDef mMethods[] = {
{"LoadObj", pyLoadObj, METH_VARARGS}, {NULL, NULL, 0, NULL}
};
#if PY_MAJOR_VERSION >= 3
static struct PyModuleDef moduledef = {PyModuleDef_HEAD_INIT, "tinyobjloader",
NULL, -1, mMethods};
PyMODINIT_FUNC PyInit_tinyobjloader(void) {
return PyModule_Create(&moduledef);
}
#else
PyMODINIT_FUNC inittinyobjloader(void) {
Py_InitModule3("tinyobjloader", mMethods, NULL);
}
#endif // PY_MAJOR_VERSION >= 3
}
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