+void Assets::LoadUniverse(const string &name, world::Simulation &sim) const {
+ std::ifstream universe_file(data_path + name);
+ io::TokenStreamReader universe_reader(universe_file);
+ ReadBody(universe_reader, sim);
+ universe_reader.Skip(io::Token::SEMICOLON);
+}
+
+world::Body *Assets::ReadBody(io::TokenStreamReader &in, world::Simulation &sim) const {
+ std::unique_ptr<world::Body> body;
+ string name;
+ in.ReadIdentifier(name);
+ if (name == "Sun") {
+ world::Sun *sun = new world::Sun;
+ body.reset(sun);
+ sim.AddSun(*sun);
+ in.Skip(io::Token::ANGLE_BRACKET_OPEN);
+ while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
+ in.ReadIdentifier(name);
+ in.Skip(io::Token::EQUALS);
+ ReadSunProperty(name, in, *sun, sim);
+ in.Skip(io::Token::SEMICOLON);
+ }
+ in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
+ in.Skip(io::Token::SEMICOLON);
+ } else if (name == "Planet") {
+ in.Skip(io::Token::PARENTHESIS_OPEN);
+ int sidelength = in.GetInt();
+ in.Skip(io::Token::PARENTHESIS_CLOSE);
+ world::Planet *planet = new world::Planet(sidelength);
+ sim.AddPlanet(*planet);
+ body.reset(planet);
+ in.Skip(io::Token::ANGLE_BRACKET_OPEN);
+ while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
+ in.ReadIdentifier(name);
+ in.Skip(io::Token::EQUALS);
+ ReadPlanetProperty(name, in, *planet, sim);
+ in.Skip(io::Token::SEMICOLON);
+ }
+ in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
+ } else {
+ throw std::runtime_error("unknown body class " + name);
+ }
+ return body.release();
+}
+
+void Assets::ReadSunProperty(const std::string &name, io::TokenStreamReader &in, world::Sun &sun, world::Simulation &sim) const {
+ if (name == "color") {
+ glm::dvec3 color(0.0);
+ in.ReadVec(color);
+ sun.Color(color);
+ } else if (name == "luminosity") {
+ sun.Luminosity(in.GetDouble());
+ } else {
+ ReadBodyProperty(name, in, sun, sim);
+ }
+}
+
+void Assets::ReadPlanetProperty(const std::string &name, io::TokenStreamReader &in, world::Planet &planet, world::Simulation &sim) const {
+ if (name == "generate") {
+ string gen;
+ in.ReadIdentifier(gen);
+ if (gen == "earthlike") {
+ world::GenerateEarthlike(data.tile_types, planet);
+ } else if (gen == "test") {
+ world::GenerateTest(data.tile_types, planet);
+ } else {
+ throw std::runtime_error("unknown surface generator " + gen);
+ }
+ } else if (name == "atmosphere") {
+ string atm;
+ in.ReadIdentifier(atm);
+ planet.Atmosphere(data.resources[atm].id);
+ } else {
+ ReadBodyProperty(name, in, planet, sim);
+ }
+}
+
+void Assets::ReadBodyProperty(const std::string &name, io::TokenStreamReader &in, world::Body &body, world::Simulation &sim) const {
+ if (name == "name") {
+ string value;
+ in.ReadString(value);
+ body.Name(value);
+ } else if (name == "mass") {
+ body.Mass(in.GetDouble());
+ } else if (name == "radius") {
+ body.Radius(in.GetDouble());
+ } else if (name == "axial_tilt") {
+ glm::dvec2 tilt(0.0);
+ in.ReadVec(tilt);
+ body.AxialTilt(tilt);
+ } else if (name == "rotation") {
+ body.Rotation(in.GetDouble());
+ } else if (name == "angular_momentum") {
+ body.AngularMomentum(in.GetDouble());
+ } else if (name == "orbit") {
+ in.Skip(io::Token::ANGLE_BRACKET_OPEN);
+ while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
+ string oname;
+ in.ReadIdentifier(oname);
+ in.Skip(io::Token::EQUALS);
+ if (oname == "SMA" || oname == "semi_major_axis") {
+ body.GetOrbit().SemiMajorAxis(in.GetDouble());
+ } else if (oname == "ECC" || oname == "eccentricity") {
+ body.GetOrbit().Eccentricity(in.GetDouble());
+ } else if (oname == "INC" || oname == "inclination") {
+ body.GetOrbit().Inclination(in.GetDouble());
+ } else if (oname == "ASC" || oname == "ascending_node" || oname == "longitude_ascending") {
+ body.GetOrbit().LongitudeAscending(in.GetDouble());
+ } else if (oname == "ARG" || oname == "APE" || oname == "argument_periapsis") {
+ body.GetOrbit().ArgumentPeriapsis(in.GetDouble());
+ } else if (oname == "MNA" || oname == "mean_anomaly") {
+ body.GetOrbit().MeanAnomaly(in.GetDouble());
+ } else {
+ throw std::runtime_error("unknown orbit property " + oname);
+ }
+ in.Skip(io::Token::SEMICOLON);
+ }
+ in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
+ } else if (name == "children") {
+ in.Skip(io::Token::BRACKET_OPEN);
+ while (in.Peek().type != io::Token::BRACKET_CLOSE) {
+ world::Body *b = ReadBody(in, sim);
+ b->SetParent(body);
+ if (in.Peek().type == io::Token::COMMA) {
+ in.Skip(io::Token::COMMA);
+ }
+ }
+ in.Skip(io::Token::BRACKET_CLOSE);
+ } else {
+ throw std::runtime_error("unknown body property " + name);
+ }
+}
+