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#include "load_obj.hh"
#define TINYOBJLOADER_IMPLEMENTATION
#include "tiny_obj_loader.h"
#include <QFile>
#include <QDebug>
QVector<GLfloat> load_obj(const char *path, int flags) {
QFile obj_file(path);
obj_file.open(QIODevice::ReadOnly | QIODevice::Text);
std::string obj = obj_file.readAll().toStdString();
tinyobj::ObjReaderConfig cfg;
cfg.triangulate = true;
cfg.vertex_color = false;
tinyobj::ObjReader reader;
if (!reader.ParseFromString(obj, "", cfg)) {
if (!reader.Error().empty()) {
qWarning() << "Erreur lors de la lecture de du modèle";
}
exit(1);
}
// if (!reader.Warning().empty()) {
// qWarning() << "TinyObjReader: " << reader.Warning();
// }
auto& attrib = reader.GetAttrib();
auto& shapes = reader.GetShapes();
QVector<GLfloat> verts;
for (size_t s = 0; s < shapes.size(); s++) {
// Loop over faces(polygon)
size_t index_offset = 0;
for (size_t f = 0; f < shapes[s].mesh.num_face_vertices.size(); f++) {
size_t fv = shapes[s].mesh.num_face_vertices[f];
// Loop over vertices in the face.
for (size_t v = 0; v < fv; v++) {
tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
tinyobj::real_t vx = attrib.vertices[3*idx.vertex_index+0];
tinyobj::real_t vy = attrib.vertices[3*idx.vertex_index+1];
tinyobj::real_t vz = attrib.vertices[3*idx.vertex_index+2];
verts.append(vx);
verts.append(vy);
verts.append(vz);
if (flags & LOAD_OBJ_NORMALS) {
tinyobj::real_t nx = attrib.normals[3*idx.normal_index+0];
tinyobj::real_t ny = attrib.normals[3*idx.normal_index+1];
tinyobj::real_t nz = attrib.normals[3*idx.normal_index+2];
verts.append(nx);
verts.append(ny);
verts.append(nz);
}
if (flags & LOAD_OBJ_UVS) {
tinyobj::real_t ts = attrib.texcoords[2*idx.texcoord_index+0];
tinyobj::real_t tt = attrib.texcoords[2*idx.texcoord_index+1];
verts.append(ts);
verts.append(tt);
}
// qDebug() << "vert" << vx << vy << vz << "tex" << ts << tt;
}
index_offset += fv;
}
}
return verts;
}
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