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