💿🐜 Antkeeper source code https://antkeeper.com
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/*
* 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;
}