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//python3 module for tinyobjloader

//usage:

// import tinyobjloader as tol

// model = tol.LoadObj(name)

// print(model["shapes"])

// print(model["materials"]

#include <Python.h>

#include <vector>

#include "../tiny_obj_loader.h"

typedef std::vector<double> vectd;

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,

*current, *meshobj;

char const* filename;

char *current_name;

vectd vect;

std::vector<tinyobj::shape_t> shapes;

std::vector<tinyobj::material_t> materials;

if(!PyArg_ParseTuple(args, "s", &filename))

return NULL;

tinyobj::LoadObj(shapes, materials, filename);

pyshapes = PyDict_New();

pymaterials = PyDict_New();

rtndict = PyDict_New();

for (std::vector<tinyobj::shape_t>::iterator shape = shapes.begin() ;

shape != shapes.end(); shape++)

{

meshobj = PyDict_New();

tinyobj::mesh_t cm = (*shape).mesh;

for (int i = 0; i <= 4; i++ )

{

current = PyList_New(0);

switch(i) {

case 0:

current_name = "positions";

vect = vectd(cm.positions.begin(), cm.positions.end()); break;

case 1:

current_name = "normals";

vect = vectd(cm.normals.begin(), cm.normals.end()); break;

case 2:

current_name = "texcoords";

vect = vectd(cm.texcoords.begin(), cm.texcoords.end()); break;

case 3:

current_name = "indicies";

vect = vectd(cm.indices.begin(), cm.indices.end()); break;

case 4:

current_name = "material_ids";

vect = vectd(cm.material_ids.begin(), cm.material_ids.end()); break;

}

for (vectd::iterator it = vect.begin() ;

it != vect.end(); it++)

{

PyList_Insert(current, it - vect.begin(), PyFloat_FromDouble(*it));

}

PyDict_SetItemString(meshobj, current_name, 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();

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, "normal_texname", PyUnicode_FromString((*mat).normal_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(pymaterials, (*mat).name.c_str(), matobj);

}

PyDict_SetItemString(rtndict, "shapes", pyshapes);

PyDict_SetItemString(rtndict, "materials", pymaterials);

return rtndict;

}

static PyMethodDef mMethods[] = {

{"LoadObj", pyLoadObj, METH_VARARGS},

{NULL, NULL, 0, NULL}

};

static struct PyModuleDef moduledef = {

PyModuleDef_HEAD_INIT,

"tinyobjloader",

NULL,

-1,

mMethods

};

PyMODINIT_FUNC

PyInit_tinyobjloader(void)

{

return PyModule_Create(&moduledef);

}