load universe from file

[blobs.git] / src / app / app.cpp

diff --git a/src/app/app.cpp b/src/app/app.cpp
index 0f50aa75d00104a21fe5a32a988bef297a98580f..950eda8cb3610c08e779ea478c578a68abc90c2b 100644 (file)
--- a/src/app/app.cpp
+++ b/src/app/app.cpp
@@ -6,6 +6,9 @@
 #include "../graphics/Viewport.hpp"
 #include "../io/Token.hpp"
 #include "../io/TokenStreamReader.hpp"
+#include "../world/Planet.hpp"
+#include "../world/Simulation.hpp"
+#include "../world/Sun.hpp"
 
 #include <fstream>
 #include <SDL.h>
@@ -457,5 +460,138 @@ void Assets::LoadSkyTexture(const string &name, graphics::CubeMap &cm) const {
        SDL_FreeSurface(srf);
 }
 
+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);
+       }
+}
+
 }
 }