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//
// Stiches multiple .obj files into one .obj.
//
#include "../../tiny_obj_loader.h"
#include "obj_writer.h"
#include <cassert>
#include <iostream>
#include <cstdlib>
#include <cstdio>
typedef std::vector<tinyobj::shape_t> Shape;
typedef std::vector<tinyobj::material_t> Material;
void
StichObjs(
std::vector<tinyobj::shape_t>& out_shape,
std::vector<tinyobj::material_t>& out_material,
const std::vector<Shape>& shapes,
const std::vector<Material>& materials)
{
int numShapes = 0;
for (size_t i = 0; i < shapes.size(); i++) {
numShapes += (int)shapes[i].size();
}
printf("Total # of shapes = %d\n", numShapes);
int materialIdOffset = 0;
size_t face_offset = 0;
for (size_t i = 0; i < shapes.size(); i++) {
for (size_t k = 0; k < shapes[i].size(); k++) {
std::string new_name = shapes[i][k].name;
// Add suffix
char buf[1024];
sprintf(buf, "_%04d", (int)i);
new_name += std::string(buf);
printf("shape[%ld][%ld].name = %s\n", i, k, shapes[i][k].name.c_str());
assert((shapes[i][k].mesh.indices.size() % 3) == 0);
assert((shapes[i][k].mesh.positions.size() % 3) == 0);
tinyobj::shape_t new_shape = shapes[i][k];
// Add offset.
for (size_t f = 0; f < new_shape.mesh.material_ids.size(); f++) {
new_shape.mesh.material_ids[f] += materialIdOffset;
}
new_shape.name = new_name;
printf("shape[%ld][%ld].new_name = %s\n", i, k, new_shape.name.c_str());
out_shape.push_back(new_shape);
}
materialIdOffset += materials[i].size();
}
for (size_t i = 0; i < materials.size(); i++) {
for (size_t k = 0; k < materials[i].size(); k++) {
out_material.push_back(materials[i][k]);
}
}
}
int
main(
int argc,
char **argv)
{
if (argc < 3) {
printf("Usage: obj_sticher input0.obj input1.obj ... output.obj\n");
exit(1);
}
int num_objfiles = argc - 2;
std::string out_filename = std::string(argv[argc-1]); // last element
std::vector<Shape> shapes;
std::vector<Material> materials;
shapes.resize(num_objfiles);
materials.resize(num_objfiles);
for (int i = 0; i < num_objfiles; i++) {
std::cout << "Loading " << argv[i+1] << " ... " << std::flush;
std::string err;
bool ret = tinyobj::LoadObj(shapes[i], materials[i], err, argv[i+1]);
if (!err.empty()) {
std::cerr << err << std::endl;
}
if (!ret) {
exit(1);
}
std::cout << "DONE." << std::endl;
}
std::vector<tinyobj::shape_t> out_shape;
std::vector<tinyobj::material_t> out_material;
StichObjs(out_shape, out_material, shapes, materials);
bool coordTransform = true;
bool ret = WriteObj(out_filename, out_shape, out_material, coordTransform);
assert(ret);
return 0;
}
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