296 lines
9.8 KiB
C++
296 lines
9.8 KiB
C++
//
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// g++ loader_example.cc
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//
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#define TINYOBJLOADER_IMPLEMENTATION
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#include "tiny_obj_loader.h"
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#include <cstdio>
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#include <cstdlib>
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#include <cassert>
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#include <iostream>
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#include <sstream>
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#include <fstream>
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static void PrintInfo(const tinyobj::attrib_t &attrib, const std::vector<tinyobj::shape_t>& shapes, const std::vector<tinyobj::material_t>& materials)
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{
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std::cout << "# of vertices : " << (attrib.vertices.size() / 3) << std::endl;
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std::cout << "# of normals : " << (attrib.normals.size() / 3) << std::endl;
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std::cout << "# of texcoords : " << (attrib.texcoords.size() / 2) << std::endl;
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std::cout << "# of shapes : " << shapes.size() << std::endl;
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std::cout << "# of materials : " << materials.size() << std::endl;
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for (size_t v = 0; v < attrib.vertices.size() / 3; v++) {
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printf(" v[%ld] = (%f, %f, %f)\n", static_cast<long>(v),
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static_cast<const double>(attrib.vertices[3*v+0]),
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static_cast<const double>(attrib.vertices[3*v+1]),
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static_cast<const double>(attrib.vertices[3*v+2]));
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}
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for (size_t v = 0; v < attrib.normals.size() / 3; v++) {
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printf(" n[%ld] = (%f, %f, %f)\n", static_cast<long>(v),
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static_cast<const double>(attrib.normals[3*v+0]),
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static_cast<const double>(attrib.normals[3*v+1]),
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static_cast<const double>(attrib.normals[3*v+2]));
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}
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for (size_t v = 0; v < attrib.texcoords.size() / 2; v++) {
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printf(" uv[%ld] = (%f, %f)\n", static_cast<long>(v),
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static_cast<const double>(attrib.texcoords[2*v+0]),
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static_cast<const double>(attrib.texcoords[2*v+1]));
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}
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// For each shape
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for (size_t i = 0; i < shapes.size(); i++) {
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printf("shape[%ld].name = %s\n", static_cast<long>(i), shapes[i].name.c_str());
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printf("Size of shape[%ld].indices: %lu\n", static_cast<long>(i), static_cast<unsigned long>(shapes[i].mesh.indices.size()));
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size_t index_offset = 0;
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assert(shapes[i].mesh.num_face_vertices.size() == shapes[i].mesh.material_ids.size());
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printf("shape[%ld].num_faces: %lu\n", static_cast<long>(i), static_cast<unsigned long>(shapes[i].mesh.num_face_vertices.size()));
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// For each face
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for (size_t f = 0; f < shapes[i].mesh.num_face_vertices.size(); f++) {
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size_t fnum = shapes[i].mesh.num_face_vertices[f];
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printf(" face[%ld].fnum = %d\n", static_cast<long>(f), static_cast<unsigned long>(fnum));
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// For each vertex in the face
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for (size_t v = 0; v < fnum; v++) {
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tinyobj::index_t idx = shapes[i].mesh.indices[index_offset + v];
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printf(" face[%ld].v[%ld].idx = %d/%d/%d\n", static_cast<long>(f), static_cast<long>(v), idx.vertex_index, idx.normal_index, idx.texcoord_index);
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}
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printf(" face[%ld].material_id = %d\n", static_cast<long>(f), shapes[i].mesh.material_ids[f]);
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index_offset += fnum;
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}
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printf("shape[%ld].num_tags: %lu\n", static_cast<long>(i), static_cast<unsigned long>(shapes[i].mesh.tags.size()));
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for (size_t t = 0; t < shapes[i].mesh.tags.size(); t++) {
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printf(" tag[%ld] = %s ", static_cast<long>(t), shapes[i].mesh.tags[t].name.c_str());
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printf(" ints: [");
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for (size_t j = 0; j < shapes[i].mesh.tags[t].intValues.size(); ++j)
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{
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printf("%ld", static_cast<long>(shapes[i].mesh.tags[t].intValues[j]));
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if (j < (shapes[i].mesh.tags[t].intValues.size()-1))
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{
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printf(", ");
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}
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}
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printf("]");
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printf(" floats: [");
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for (size_t j = 0; j < shapes[i].mesh.tags[t].floatValues.size(); ++j)
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{
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printf("%f", static_cast<const double>(shapes[i].mesh.tags[t].floatValues[j]));
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if (j < (shapes[i].mesh.tags[t].floatValues.size()-1))
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{
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printf(", ");
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}
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}
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printf("]");
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printf(" strings: [");
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for (size_t j = 0; j < shapes[i].mesh.tags[t].stringValues.size(); ++j)
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{
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printf("%s", shapes[i].mesh.tags[t].stringValues[j].c_str());
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if (j < (shapes[i].mesh.tags[t].stringValues.size()-1))
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{
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printf(", ");
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}
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}
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printf("]");
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printf("\n");
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}
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}
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for (size_t i = 0; i < materials.size(); i++) {
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printf("material[%ld].name = %s\n", static_cast<long>(i), materials[i].name.c_str());
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printf(" material.Ka = (%f, %f ,%f)\n", static_cast<const double>(materials[i].ambient[0]), static_cast<const double>(materials[i].ambient[1]), static_cast<const double>(materials[i].ambient[2]));
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printf(" material.Kd = (%f, %f ,%f)\n", static_cast<const double>(materials[i].diffuse[0]), static_cast<const double>(materials[i].diffuse[1]), static_cast<const double>(materials[i].diffuse[2]));
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printf(" material.Ks = (%f, %f ,%f)\n", static_cast<const double>(materials[i].specular[0]), static_cast<const double>(materials[i].specular[1]), static_cast<const double>(materials[i].specular[2]));
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printf(" material.Tr = (%f, %f ,%f)\n", static_cast<const double>(materials[i].transmittance[0]), static_cast<const double>(materials[i].transmittance[1]), static_cast<const double>(materials[i].transmittance[2]));
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printf(" material.Ke = (%f, %f ,%f)\n", static_cast<const double>(materials[i].emission[0]), static_cast<const double>(materials[i].emission[1]), static_cast<const double>(materials[i].emission[2]));
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printf(" material.Ns = %f\n", static_cast<const double>(materials[i].shininess));
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printf(" material.Ni = %f\n", static_cast<const double>(materials[i].ior));
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printf(" material.dissolve = %f\n", static_cast<const double>(materials[i].dissolve));
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printf(" material.illum = %d\n", materials[i].illum);
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printf(" material.map_Ka = %s\n", materials[i].ambient_texname.c_str());
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printf(" material.map_Kd = %s\n", materials[i].diffuse_texname.c_str());
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printf(" material.map_Ks = %s\n", materials[i].specular_texname.c_str());
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printf(" material.map_Ns = %s\n", materials[i].specular_highlight_texname.c_str());
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printf(" material.map_bump = %s\n", materials[i].bump_texname.c_str());
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printf(" material.map_d = %s\n", materials[i].alpha_texname.c_str());
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printf(" material.disp = %s\n", materials[i].displacement_texname.c_str());
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std::map<std::string, std::string>::const_iterator it(materials[i].unknown_parameter.begin());
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std::map<std::string, std::string>::const_iterator itEnd(materials[i].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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}
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static bool
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TestLoadObj(
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const char* filename,
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const char* basepath = NULL,
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bool triangulate = true)
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{
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std::cout << "Loading " << filename << std::endl;
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tinyobj::attrib_t attrib;
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std::vector<tinyobj::shape_t> shapes;
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std::vector<tinyobj::material_t> materials;
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std::string err;
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bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename, basepath, triangulate);
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if (!err.empty()) {
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std::cerr << err << std::endl;
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}
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if (!ret) {
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printf("Failed to load/parse .obj.\n");
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return false;
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}
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PrintInfo(attrib, shapes, materials);
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return true;
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}
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static bool
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TestStreamLoadObj()
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{
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std::cout << "Stream Loading " << std::endl;
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std::stringstream objStream;
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objStream
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<< "mtllib cube.mtl\n"
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"\n"
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"v 0.000000 2.000000 2.000000\n"
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"v 0.000000 0.000000 2.000000\n"
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"v 2.000000 0.000000 2.000000\n"
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"v 2.000000 2.000000 2.000000\n"
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"v 0.000000 2.000000 0.000000\n"
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"v 0.000000 0.000000 0.000000\n"
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"v 2.000000 0.000000 0.000000\n"
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"v 2.000000 2.000000 0.000000\n"
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"# 8 vertices\n"
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"\n"
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"g front cube\n"
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"usemtl white\n"
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"f 1 2 3 4\n"
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"g back cube\n"
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"# expects white material\n"
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"f 8 7 6 5\n"
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"g right cube\n"
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"usemtl red\n"
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"f 4 3 7 8\n"
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"g top cube\n"
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"usemtl white\n"
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"f 5 1 4 8\n"
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"g left cube\n"
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"usemtl green\n"
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"f 5 6 2 1\n"
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"g bottom cube\n"
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"usemtl white\n"
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"f 2 6 7 3\n"
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"# 6 elements";
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std::string matStream(
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"newmtl white\n"
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"Ka 0 0 0\n"
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"Kd 1 1 1\n"
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"Ks 0 0 0\n"
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"\n"
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"newmtl red\n"
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"Ka 0 0 0\n"
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"Kd 1 0 0\n"
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"Ks 0 0 0\n"
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"\n"
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"newmtl green\n"
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"Ka 0 0 0\n"
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"Kd 0 1 0\n"
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"Ks 0 0 0\n"
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"\n"
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"newmtl blue\n"
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"Ka 0 0 0\n"
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"Kd 0 0 1\n"
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"Ks 0 0 0\n"
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"\n"
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"newmtl light\n"
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"Ka 20 20 20\n"
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"Kd 1 1 1\n"
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"Ks 0 0 0");
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using namespace tinyobj;
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class MaterialStringStreamReader:
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public MaterialReader
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{
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public:
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MaterialStringStreamReader(const std::string& matSStream): m_matSStream(matSStream) {}
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virtual ~MaterialStringStreamReader() {}
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virtual bool operator() (
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const std::string& matId,
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std::vector<material_t>* materials,
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std::map<std::string, int>* matMap,
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std::string* err)
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{
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(void)matId;
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(void)err;
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LoadMtl(matMap, materials, &m_matSStream);
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return true;
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}
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private:
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std::stringstream m_matSStream;
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};
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MaterialStringStreamReader matSSReader(matStream);
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tinyobj::attrib_t attrib;
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std::vector<tinyobj::shape_t> shapes;
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std::vector<tinyobj::material_t> materials;
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std::string err;
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bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, &objStream, &matSSReader);
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if (!err.empty()) {
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std::cerr << err << std::endl;
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}
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if (!ret) {
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return false;
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}
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PrintInfo(attrib, shapes, materials);
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return true;
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}
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int
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main(
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int argc,
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char **argv)
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{
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if (argc > 1) {
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const char* basepath = "models/";
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if (argc > 2) {
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basepath = argv[2];
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}
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assert(true == TestLoadObj(argv[1], basepath));
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} else {
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//assert(true == TestLoadObj("cornell_box.obj"));
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//assert(true == TestLoadObj("cube.obj"));
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assert(true == TestStreamLoadObj());
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assert(true == TestLoadObj("models/catmark_torus_creases0.obj", "models/", false));
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}
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return 0;
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}
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