-
-
Notifications
You must be signed in to change notification settings - Fork 598
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Moved write_obj functions to separate header file
This makes Mesh.hpp much more lightweight to include as it doesn't require <fstream> and <string> anymore. Users that use write_obj or write_textured_obj will now need to explicitly #include "eos/core/write_obj.hpp".
- Loading branch information
1 parent
4381fd1
commit a040c0e
Showing
7 changed files
with
177 additions
and
137 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| /* | ||
| * eos - A 3D Morphable Model fitting library written in modern C++11/14. | ||
| * | ||
| * File: include/eos/core/write_obj.hpp | ||
| * | ||
| * Copyright 2017-2019 Patrik Huber | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| #pragma once | ||
|
|
||
| #ifndef EOS_WRITE_OBJ_HPP | ||
| #define EOS_WRITE_OBJ_HPP | ||
|
|
||
| #include "eos/core/Mesh.hpp" | ||
|
|
||
| #include <cassert> | ||
| #include <fstream> | ||
| #include <string> | ||
| #include <stdexcept> | ||
|
|
||
| namespace eos { | ||
| namespace core { | ||
|
|
||
| /** | ||
| * @brief Writes the given Mesh to an obj file that for example can be read by MeshLab. | ||
| * | ||
| * If the mesh contains vertex colour information, it will be written to the obj as well. | ||
| * | ||
| * @param[in] mesh The mesh to save as obj. | ||
| * @param[in] filename Output filename (including ".obj"). | ||
| */ | ||
| inline void write_obj(Mesh mesh, std::string filename) | ||
| { | ||
| assert(mesh.vertices.size() == mesh.colors.size() || mesh.colors.empty()); | ||
|
|
||
| std::ofstream obj_file(filename); | ||
|
|
||
| if (mesh.colors.empty()) | ||
| { | ||
| for (std::size_t i = 0; i < mesh.vertices.size(); ++i) | ||
| { | ||
| obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " | ||
| << mesh.vertices[i][2] << std::endl; | ||
| } | ||
| } else | ||
| { | ||
| for (std::size_t i = 0; i < mesh.vertices.size(); ++i) | ||
| { | ||
| obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " | ||
| << mesh.vertices[i][2] << " " << mesh.colors[i][0] << " " << mesh.colors[i][1] << " " | ||
| << mesh.colors[i][2] << std::endl; | ||
| } | ||
| } | ||
|
|
||
| if (!mesh.texcoords.empty()) | ||
| { | ||
| for (auto&& tc : mesh.texcoords) | ||
| { | ||
| obj_file << "vt " << tc[0] << " " << tc[1] << std::endl; | ||
| } | ||
| } | ||
|
|
||
| for (auto&& v : mesh.tvi) | ||
| { | ||
| // Add one because obj starts counting triangle indices at 1 | ||
| obj_file << "f " << v[0] + 1 << " " << v[1] + 1 << " " << v[2] + 1 << std::endl; | ||
| } | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| /** | ||
| * @brief Writes an obj file of the given Mesh, including texture coordinates, | ||
| * and an mtl file containing a reference to the isomap. | ||
| * | ||
| * The obj will contain texture coordinates for the mesh, and the | ||
| * mtl file will link to a file named <filename>.isomap.png. | ||
| * Note that the texture (isomap) has to be saved separately. | ||
| * | ||
| * @param[in] mesh The mesh to save as obj. | ||
| * @param[in] filename Output filename, including .obj. | ||
| */ | ||
| inline void write_textured_obj(Mesh mesh, std::string filename) | ||
| { | ||
| assert((mesh.vertices.size() == mesh.colors.size() || mesh.colors.empty()) && !mesh.texcoords.empty()); | ||
|
|
||
| if (filename.at(filename.size() - 4) != '.') | ||
| { | ||
| throw std::runtime_error( | ||
| "Error in given filename: Expected a dot and a 3-letter extension at the end (i.e. '.obj'). " + | ||
| filename); | ||
| } | ||
|
|
||
| // Takes a full path to a file and returns only the filename: | ||
| const auto get_filename = [](const std::string& path) { | ||
| auto last_slash = path.find_last_of("/\\"); | ||
| if (last_slash == std::string::npos) | ||
| { | ||
| return path; | ||
| } | ||
| return path.substr(last_slash + 1, path.size()); | ||
| }; | ||
|
|
||
| std::ofstream obj_file(filename); | ||
|
|
||
| std::string mtl_filename(filename); | ||
| // replace '.obj' at the end with '.mtl': | ||
| mtl_filename.replace(std::end(mtl_filename) - 4, std::end(mtl_filename), ".mtl"); | ||
|
|
||
| obj_file << "mtllib " << get_filename(mtl_filename) << std::endl; // first line of the obj file | ||
|
|
||
| // same as in write_obj(): | ||
| if (mesh.colors.empty()) | ||
| { | ||
| for (std::size_t i = 0; i < mesh.vertices.size(); ++i) | ||
| { | ||
| obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " | ||
| << mesh.vertices[i][2] << " " << std::endl; | ||
| } | ||
| } else | ||
| { | ||
| for (std::size_t i = 0; i < mesh.vertices.size(); ++i) | ||
| { | ||
| obj_file << "v " << mesh.vertices[i][0] << " " << mesh.vertices[i][1] << " " | ||
| << mesh.vertices[i][2] << " " << mesh.colors[i][0] << " " << mesh.colors[i][1] << " " | ||
| << mesh.colors[i][2] << " " << std::endl; | ||
| } | ||
| } | ||
| // end | ||
|
|
||
| for (std::size_t i = 0; i < mesh.texcoords.size(); ++i) | ||
| { | ||
| obj_file << "vt " << mesh.texcoords[i][0] << " " << 1.0f - mesh.texcoords[i][1] << std::endl; | ||
| // We invert y because Meshlab's uv origin (0, 0) is on the bottom-left | ||
| } | ||
|
|
||
| obj_file << "usemtl FaceTexture" << std::endl; // the name of our texture (material) will be 'FaceTexture' | ||
|
|
||
| for (auto&& v : mesh.tvi) | ||
| { | ||
| // This assumes mesh.texcoords.size() == mesh.vertices.size(). The texture indices could theoretically be different (for example in the cube-mapped 3D scan). | ||
| // Add one because obj starts counting triangle indices at 1 | ||
| obj_file << "f " << v[0] + 1 << "/" << v[0] + 1 << " " << v[1] + 1 << "/" << v[1] + 1 << " " | ||
| << v[2] + 1 << "/" << v[2] + 1 << std::endl; | ||
| } | ||
|
|
||
| std::ofstream mtl_file(mtl_filename); | ||
| std::string texture_filename(filename); | ||
| // replace '.obj' at the end with '.isomap.png': | ||
| texture_filename.replace(std::end(texture_filename) - 4, std::end(texture_filename), ".isomap.png"); | ||
|
|
||
| mtl_file << "newmtl FaceTexture" << std::endl; | ||
| mtl_file << "map_Kd " << get_filename(texture_filename) << std::endl; | ||
|
|
||
| return; | ||
| }; | ||
|
|
||
| } /* namespace core */ | ||
| } /* namespace eos */ | ||
|
|
||
| #endif /* EOS_WRITE_OBJ_HPP */ |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters