- /*
- * Copyright (C) 2021 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "resources/resource-loader.hpp"
- #include "geom/mesh.hpp"
- #include "geom/mesh-functions.hpp"
- #include "utility/fundamental-types.hpp"
- #include <sstream>
- #include <stdexcept>
- #include <physfs.h>
-
- template <>
- geom::mesh* resource_loader<geom::mesh>::load(resource_manager* resource_manager, PHYSFS_File* file)
- {
- std::string line;
- std::vector<float3> vertices;
- std::vector<std::array<std::uint_fast32_t, 3>> triangles;
-
- while (!PHYSFS_eof(file))
- {
- // Read line
- physfs_getline(file, line);
-
- // Tokenize line
- std::vector<std::string> tokens;
- std::string token;
- std::istringstream linestream(line);
- while (linestream >> token)
- tokens.push_back(token);
-
- // Skip empty lines and comments
- if (tokens.empty() || tokens[0][0] == '#')
- continue;
-
- if (tokens[0] == "v")
- {
- if (tokens.size() != 4)
- {
- std::stringstream stream;
- stream << "resource_loader<mesh>::load(): Invalid line \"" << line << "\"" << std::endl;
- throw std::runtime_error(stream.str());
- }
-
- float3 vertex;
-
- std::stringstream(tokens[1]) >> vertex[0];
- std::stringstream(tokens[2]) >> vertex[1];
- std::stringstream(tokens[3]) >> vertex[2];
-
- vertices.push_back(vertex);
- }
- else if (tokens[0] == "f")
- {
- if (tokens.size() != 4)
- {
- std::stringstream stream;
- stream << "resource_loader<mesh>::load(): Invalid line \"" << line << "\"" << std::endl;
- throw std::runtime_error(stream.str());
-
- }
-
- std::uint_fast32_t a, b, c;
- std::stringstream(tokens[1]) >> a;
- std::stringstream(tokens[2]) >> b;
- std::stringstream(tokens[3]) >> c;
- triangles.push_back({a - 1, b - 1, c - 1});
- }
- }
-
- geom::mesh* mesh = new geom::mesh();
- geom::create_triangle_mesh(*mesh, vertices, triangles);
-
- return mesh;
- }
-
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