250 lines
11 KiB
C++
250 lines
11 KiB
C++
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#include "../libslic3r.h"
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#include "../Model.hpp"
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#include "../TriangleMesh.hpp"
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#include "OBJ.hpp"
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#include "objparser.hpp"
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#include <string>
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#include <boost/log/trivial.hpp>
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#ifdef _WIN32
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#define DIR_SEPARATOR '\\'
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#else
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#define DIR_SEPARATOR '/'
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#endif
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//Translation
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#include "I18N.hpp"
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#define _L(s) Slic3r::I18N::translate(s)
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namespace Slic3r {
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bool load_obj(const char *path, TriangleMesh *meshptr, ObjInfo& obj_info, std::string &message)
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{
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if (meshptr == nullptr)
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return false;
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// Parse the OBJ file.
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ObjParser::ObjData data;
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ObjParser::MtlData mtl_data;
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if (! ObjParser::objparse(path, data)) {
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BOOST_LOG_TRIVIAL(error) << "load_obj: failed to parse " << path;
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message = _L("load_obj: failed to parse");
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return false;
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}
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bool exist_mtl = false;
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if (data.mtllibs.size() > 0) { // read mtl
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for (auto mtl_name : data.mtllibs) {
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if (mtl_name.size() == 0){
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continue;
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}
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exist_mtl = true;
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bool mtl_name_is_path = false;
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boost::filesystem::path mtl_abs_path(mtl_name);
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if (boost::filesystem::exists(mtl_abs_path)) {
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mtl_name_is_path = true;
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}
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boost::filesystem::path mtl_path;
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if (!mtl_name_is_path) {
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boost::filesystem::path full_path(path);
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std::string dir = full_path.parent_path().string();
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auto mtl_file = dir + "/" + mtl_name;
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boost::filesystem::path temp_mtl_path(mtl_file);
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mtl_path = temp_mtl_path;
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}
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auto _mtl_path = mtl_name_is_path ? mtl_abs_path.string().c_str() : mtl_path.string().c_str();
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if (boost::filesystem::exists(mtl_name_is_path ? mtl_abs_path : mtl_path)) {
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if (!ObjParser::mtlparse(_mtl_path, mtl_data)) {
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BOOST_LOG_TRIVIAL(error) << "load_obj:load_mtl: failed to parse " << _mtl_path;
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message = _L("load mtl in obj: failed to parse");
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return false;
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}
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}
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else {
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BOOST_LOG_TRIVIAL(error) << "load_obj: failed to load mtl_path:" << _mtl_path;
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}
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}
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}
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// Count the faces and verify, that all faces are triangular.
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size_t num_faces = 0;
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size_t num_quads = 0;
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for (size_t i = 0; i < data.vertices.size(); ++ i) {
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// Find the end of face.
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size_t j = i;
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for (; j < data.vertices.size() && data.vertices[j].coordIdx != -1; ++ j) ;
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if (size_t num_face_vertices = j - i; num_face_vertices > 0) {
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if (num_face_vertices > 4) {
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// Non-triangular and non-quad faces are not supported as of now.
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BOOST_LOG_TRIVIAL(error) << "load_obj: failed to parse " << path << ". The file contains polygons with more than 4 vertices.";
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message = _L("The file contains polygons with more than 4 vertices.");
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return false;
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} else if (num_face_vertices < 3) {
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// Non-triangular and non-quad faces are not supported as of now.
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BOOST_LOG_TRIVIAL(error) << "load_obj: failed to parse " << path << ". The file contains polygons with less than 2 vertices.";
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message = _L("The file contains polygons with less than 2 vertices.");
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return false;
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}
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if (num_face_vertices == 4)
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++ num_quads;
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++ num_faces;
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i = j;
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}
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}
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// Convert ObjData into indexed triangle set.
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indexed_triangle_set its;
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size_t num_vertices = data.coordinates.size() / OBJ_VERTEX_LENGTH;
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its.vertices.reserve(num_vertices);
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its.indices.reserve(num_faces + num_quads);
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if (exist_mtl) {
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obj_info.is_single_mtl = data.usemtls.size() == 1 && mtl_data.new_mtl_unmap.size() == 1;
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obj_info.face_colors.reserve(num_faces + num_quads);
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}
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bool has_color = data.has_vertex_color;
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for (size_t i = 0; i < num_vertices; ++ i) {
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size_t j = i * OBJ_VERTEX_LENGTH;
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its.vertices.emplace_back(data.coordinates[j], data.coordinates[j + 1], data.coordinates[j + 2]);
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if (data.has_vertex_color) {
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RGBA color{std::clamp(data.coordinates[j + 3], 0.f, 1.f), std::clamp(data.coordinates[j + 4], 0.f, 1.f), std::clamp(data.coordinates[j + 5], 0.f, 1.f),
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std::clamp(data.coordinates[j + 6], 0.f, 1.f)};
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obj_info.vertex_colors.emplace_back(color);
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}
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}
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int indices[ONE_FACE_SIZE];
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int uvs[ONE_FACE_SIZE];
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for (size_t i = 0; i < data.vertices.size();)
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if (data.vertices[i].coordIdx == -1)
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++ i;
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else {
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int cnt = 0;
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while (i < data.vertices.size())
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if (const ObjParser::ObjVertex &vertex = data.vertices[i ++]; vertex.coordIdx == -1) {
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break;
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} else {
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assert(cnt < OBJ_VERTEX_LENGTH);
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if (vertex.coordIdx < 0 || vertex.coordIdx >= int(its.vertices.size())) {
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BOOST_LOG_TRIVIAL(error) << "load_obj: failed to parse " << path << ". The file contains invalid vertex index.";
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message = _L("The file contains invalid vertex index.");
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return false;
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}
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indices[cnt] = vertex.coordIdx;
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uvs[cnt] = vertex.textureCoordIdx;
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cnt++;
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}
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if (cnt) {
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assert(cnt == 3 || cnt == 4);
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// Insert one or two faces (triangulate a quad).
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its.indices.emplace_back(indices[0], indices[1], indices[2]);
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int face_index =its.indices.size() - 1;
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RGBA face_color;
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auto set_face_color = [&uvs, &data, &mtl_data, &obj_info, &face_color](int face_index, const std::string mtl_name) {
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if (mtl_data.new_mtl_unmap.find(mtl_name) != mtl_data.new_mtl_unmap.end()) {
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bool is_merge_ka_kd = true;
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for (size_t n = 0; n < 3; n++) {
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if (float(mtl_data.new_mtl_unmap[mtl_name]->Ka[n] + mtl_data.new_mtl_unmap[mtl_name]->Kd[n]) > 1.0) {
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is_merge_ka_kd=false;
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break;
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}
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}
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for (size_t n = 0; n < 3; n++) {
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if (is_merge_ka_kd) {
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face_color[n] = std::clamp(float(mtl_data.new_mtl_unmap[mtl_name]->Ka[n] + mtl_data.new_mtl_unmap[mtl_name]->Kd[n]), 0.f, 1.f);
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}
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else {
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face_color[n] = std::clamp(float(mtl_data.new_mtl_unmap[mtl_name]->Kd[n]), 0.f, 1.f);
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}
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}
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face_color[3] = mtl_data.new_mtl_unmap[mtl_name]->Tr; // alpha
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if (mtl_data.new_mtl_unmap[mtl_name]->map_Kd.size() > 0) {
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auto png_name = mtl_data.new_mtl_unmap[mtl_name]->map_Kd;
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obj_info.has_uv_png = true;
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if (obj_info.pngs.find(png_name) == obj_info.pngs.end()) { obj_info.pngs[png_name] = false; }
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obj_info.uv_map_pngs[face_index] = png_name;
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}
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if (data.textureCoordinates.size() > 0) {
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Vec2f uv0(data.textureCoordinates[uvs[0] * 2], data.textureCoordinates[uvs[0] * 2 + 1]);
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Vec2f uv1(data.textureCoordinates[uvs[1] * 2], data.textureCoordinates[uvs[1] * 2 + 1]);
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Vec2f uv2(data.textureCoordinates[uvs[2] * 2], data.textureCoordinates[uvs[2] * 2 + 1]);
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std::array<Vec2f, 3> uv_array{uv0, uv1, uv2};
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obj_info.uvs.emplace_back(uv_array);
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}
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obj_info.face_colors.emplace_back(face_color);
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}
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};
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auto set_face_color_by_mtl = [&data, &set_face_color](int face_index) {
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if (data.usemtls.size() == 1) {
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set_face_color(face_index, data.usemtls[0].name);
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} else {
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for (size_t k = 0; k < data.usemtls.size(); k++) {
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auto mtl = data.usemtls[k];
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if (face_index >= mtl.face_start && face_index <= mtl.face_end) {
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set_face_color(face_index, data.usemtls[k].name);
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break;
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}
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}
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}
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};
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if (exist_mtl) {
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set_face_color_by_mtl(face_index);
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}
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if (cnt == 4) {
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its.indices.emplace_back(indices[0], indices[2], indices[3]);
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int face_index = its.indices.size() - 1;
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if (exist_mtl) {
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set_face_color_by_mtl(face_index);
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}
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}
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}
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}
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*meshptr = TriangleMesh(std::move(its));
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if (meshptr->empty()) {
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BOOST_LOG_TRIVIAL(error) << "load_obj: This OBJ file couldn't be read because it's empty. " << path;
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message = _L("This OBJ file couldn't be read because it's empty.");
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return false;
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}
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if (meshptr->volume() < 0)
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meshptr->flip_triangles();
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return true;
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}
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bool load_obj(const char *path, Model *model, ObjInfo& obj_info, std::string &message, const char *object_name_in)
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{
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TriangleMesh mesh;
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bool ret = load_obj(path, &mesh, obj_info, message);
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if (ret) {
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std::string object_name;
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if (object_name_in == nullptr) {
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const char *last_slash = strrchr(path, DIR_SEPARATOR);
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object_name.assign((last_slash == nullptr) ? path : last_slash + 1);
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} else
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object_name.assign(object_name_in);
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model->add_object(object_name.c_str(), path, std::move(mesh));
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}
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return ret;
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}
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bool store_obj(const char *path, TriangleMesh *mesh)
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{
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//FIXME returning false even if write failed.
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mesh->WriteOBJFile(path);
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return true;
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}
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bool store_obj(const char *path, ModelObject *model_object)
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{
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TriangleMesh mesh = model_object->mesh();
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return store_obj(path, &mesh);
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}
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bool store_obj(const char *path, Model *model)
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{
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TriangleMesh mesh = model->mesh();
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return store_obj(path, &mesh);
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}
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}; // namespace Slic3r
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