src/app/app.cpp

   1 #include "Application.hpp"
   2 #include "Assets.hpp"
   3 #include "State.hpp"
   4
   5 #include "init.hpp"
   6 #include "../graphics/Viewport.hpp"
   7 #include "../io/Token.hpp"
   8 #include "../io/TokenStreamReader.hpp"
   9 #include "../world/Planet.hpp"
  10 #include "../world/Simulation.hpp"
  11 #include "../world/Sun.hpp"
  12
  13 #include <fstream>
  14 #include <SDL.h>
  15 #include <SDL_image.h>
  16
  17 using std::string;
  18
  19
  20 namespace blobs {
  21 namespace app {
  22
  23 Application::Application(Window &win, graphics::Viewport &vp)
  24 : window(win)
  25 , viewport(vp)
  26 , states() {
  27 }
  28
  29 Application::~Application() {
  30 }
  31
  32
  33 void Application::PushState(State *s) {
  34         s->app = this;
  35         if (!states.empty()) {
  36                 states.top()->OnPause();
  37         }
  38         states.emplace(s);
  39         ++s->ref_count;
  40         if (s->ref_count == 1) {
  41                 s->OnEnter();
  42                 s->OnResize(viewport.Width(), viewport.Height());
  43         }
  44         s->OnResume();
  45 }
  46
  47 State *Application::PopState() {
  48         State *s = states.top();
  49         states.pop();
  50         s->OnPause();
  51         s->OnExit();
  52         if (!states.empty()) {
  53                 states.top()->OnResume();
  54         }
  55         return s;
  56 }
  57
  58 State *Application::SwitchState(State *s_new) {
  59         s_new->app = this;
  60         State *s_old = states.top();
  61         states.top() = s_new;
  62         --s_old->ref_count;
  63         ++s_new->ref_count;
  64         s_old->OnPause();
  65         if (s_old->ref_count == 0) {
  66                 s_old->OnExit();
  67         }
  68         if (s_new->ref_count == 1) {
  69                 s_new->OnEnter();
  70                 s_new->OnResize(viewport.Width(), viewport.Height());
  71         }
  72         s_new->OnResume();
  73         return s_old;
  74 }
  75
  76 State &Application::GetState() {
  77         return *states.top();
  78 }
  79
  80 bool Application::HasState() const noexcept {
  81         return !states.empty();
  82 }
  83
  84
  85 void Application::Run() {
  86         Uint32 last = SDL_GetTicks();
  87         while (HasState()) {
  88                 Uint32 now = SDL_GetTicks();
  89                 int delta = now - last;
  90                 Loop(delta);
  91                 last = now;
  92         }
  93 }
  94
  95 void Application::Loop(int dt) {
  96         HandleEvents();
  97         if (!HasState()) return;
  98         GetState().Update(dt);
  99         if (!HasState()) return;
 100         viewport.Clear();
 101         GetState().Render(viewport);
 102         window.Flip();
 103 }
 104
 105 void Application::HandleEvents() {
 106         SDL_Event event;
 107         while (HasState() && SDL_PollEvent(&event)) {
 108                 if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_RESIZED) {
 109                         viewport.Resize(event.window.data1, event.window.data2);
 110                 }
 111                 GetState().Handle(event);
 112         }
 113 }
 114
 115 void State::Handle(const SDL_Event &event) {
 116         switch (event.type) {
 117                 case SDL_KEYDOWN:
 118                         OnKeyDown(event.key);
 119                         break;
 120                 case SDL_KEYUP:
 121                         OnKeyUp(event.key);
 122                         break;
 123                 case SDL_MOUSEBUTTONDOWN:
 124                         OnMouseDown(event.button);
 125                         break;
 126                 case SDL_MOUSEBUTTONUP:
 127                         OnMouseUp(event.button);
 128                         break;
 129                 case SDL_MOUSEMOTION:
 130                         OnMouseMotion(event.motion);
 131                         break;
 132                 case SDL_MOUSEWHEEL:
 133                         OnMouseWheel(event.wheel);
 134                         break;
 135                 case SDL_QUIT:
 136                         OnQuit();
 137                         break;
 138                 case SDL_WINDOWEVENT:
 139                         Handle(event.window);
 140                         break;
 141                 default:
 142                         // ignore
 143                         break;
 144         }
 145 }
 146
 147 void State::Handle(const SDL_WindowEvent &event) {
 148         switch (event.event) {
 149                 case SDL_WINDOWEVENT_FOCUS_GAINED:
 150                         OnFocus();
 151                         break;
 152                 case SDL_WINDOWEVENT_FOCUS_LOST:
 153                         OnBlur();
 154                         break;
 155                 case SDL_WINDOWEVENT_RESIZED:
 156                         OnResize(event.data1, event.data2);
 157                         break;
 158                 default:
 159                         break;
 160         }
 161 }
 162
 163 void State::Update(int dt) {
 164         OnUpdate(dt);
 165 }
 166
 167 void State::Render(graphics::Viewport &viewport) {
 168         OnRender(viewport);
 169 }
 170
 171 void State::OnQuit() {
 172         while (App().HasState()) {
 173                 App().PopState();
 174         }
 175 }
 176
 177
 178 Assets::Assets()
 179 : path("assets/")
 180 , data_path(path + "data/")
 181 , font_path(path + "fonts/")
 182 , skin_path(path + "skins/")
 183 , sky_path(path + "skies/")
 184 , tile_path(path + "tiles/")
 185 , random(0x6283B64CEFE57925)
 186 , fonts{
 187         graphics::Font(font_path + "DejaVuSans.ttf", 32),
 188         graphics::Font(font_path + "DejaVuSans.ttf", 24),
 189         graphics::Font(font_path + "DejaVuSans.ttf", 16)
 190 } {
 191         {
 192                 std::ifstream resource_file(data_path + "resources");
 193                 io::TokenStreamReader resource_reader(resource_file);
 194                 ReadResources(resource_reader);
 195         }
 196
 197         {
 198                 std::ifstream tile_file(data_path + "tile_types");
 199                 io::TokenStreamReader tile_reader(tile_file);
 200                 ReadTileTypes(tile_reader);
 201         }
 202
 203
 204         graphics::Format format;
 205         textures.tiles.Bind();
 206         textures.tiles.Reserve(256, 256, 14, format);
 207         LoadTileTexture("algae",    textures.tiles,  0);
 208         LoadTileTexture("desert",   textures.tiles,  1);
 209         LoadTileTexture("forest",   textures.tiles,  2);
 210         LoadTileTexture("grass",    textures.tiles,  3);
 211         LoadTileTexture("ice",      textures.tiles,  4);
 212         LoadTileTexture("jungle",   textures.tiles,  5);
 213         LoadTileTexture("mountain", textures.tiles,  6);
 214         LoadTileTexture("ocean",    textures.tiles,  7);
 215         LoadTileTexture("rock",     textures.tiles,  8);
 216         LoadTileTexture("sand",     textures.tiles,  9);
 217         LoadTileTexture("taiga",    textures.tiles, 10);
 218         LoadTileTexture("tundra",   textures.tiles, 11);
 219         LoadTileTexture("water",    textures.tiles, 12);
 220         LoadTileTexture("wheat",    textures.tiles, 13);
 221         textures.tiles.FilterTrilinear();
 222
 223         textures.skins.Bind();
 224         textures.skins.Reserve(256, 256, 9, format);
 225         LoadSkinTexture("plain", textures.skins, 0);
 226         LoadSkinTexture("stripes", textures.skins, 1);
 227         LoadSkinTexture("dots", textures.skins, 2);
 228         LoadSkinTexture("lines", textures.skins, 3);
 229         LoadSkinTexture("spots", textures.skins, 4);
 230         LoadSkinTexture("circles", textures.skins, 5);
 231         textures.skins.FilterTrilinear();
 232
 233         textures.sky.Bind();
 234         LoadSkyTexture("blue", textures.sky);
 235         textures.sky.FilterTrilinear();
 236         textures.sky.WrapEdge();
 237 }
 238
 239 Assets::~Assets() {
 240 }
 241
 242 void Assets::ReadResources(io::TokenStreamReader &in) {
 243         while (in.HasMore()) {
 244                 string name;
 245                 in.ReadIdentifier(name);
 246                 in.Skip(io::Token::EQUALS);
 247
 248                 int id = 0;
 249                 if (data.resources.Has(name)) {
 250                         id = data.resources[name].id;
 251                 } else {
 252                         world::Resource res;
 253                         res.name = name;
 254                         id = data.resources.Add(res);
 255                 }
 256
 257                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 258                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 259                         in.ReadIdentifier(name);
 260                         in.Skip(io::Token::EQUALS);
 261                         if (name == "label") {
 262                                 in.ReadString(data.resources[id].label);
 263                         } else if (name == "density") {
 264                                 data.resources[id].density = in.GetDouble();
 265                         } else if (name == "energy") {
 266                                 data.resources[id].energy = in.GetDouble();
 267                                 data.resources[id].inverse_energy = 1.0 / data.resources[id].energy;
 268                         } else if (name == "state") {
 269                                 in.ReadIdentifier(name);
 270                                 if (name == "solid") {
 271                                         data.resources[id].state = world::Resource::SOLID;
 272                                 } else if (name == "liquid") {
 273                                         data.resources[id].state = world::Resource::LIQUID;
 274                                 } else if (name == "gas") {
 275                                         data.resources[id].state = world::Resource::GAS;
 276                                 } else if (name == "plasma") {
 277                                         data.resources[id].state = world::Resource::PLASMA;
 278                                 } else {
 279                                         throw std::runtime_error("unknown resource state '" + name + "'");
 280                                 }
 281                         } else if (name == "base_color") {
 282                                 in.ReadVec(data.resources[id].base_color);
 283                         } else if (name == "compatibility") {
 284                                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 285                                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 286                                         in.ReadIdentifier(name);
 287                                         int sub_id = 0;
 288                                         if (data.resources.Has(name)) {
 289                                                 sub_id = data.resources[name].id;
 290                                         } else {
 291                                                 world::Resource res;
 292                                                 res.name = name;
 293                                                 sub_id = data.resources.Add(res);
 294                                         }
 295                                         in.Skip(io::Token::COLON);
 296                                         double value = in.GetDouble();
 297                                         in.Skip(io::Token::SEMICOLON);
 298                                         data.resources[id].compatibility[sub_id] = value;
 299                                 }
 300                                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 301                         } else {
 302                                 throw std::runtime_error("unknown resource property '" + name + "'");
 303                         }
 304                         in.Skip(io::Token::SEMICOLON);
 305                 }
 306                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 307                 in.Skip(io::Token::SEMICOLON);
 308         }
 309 }
 310
 311 void Assets::ReadTileTypes(io::TokenStreamReader &in) {
 312         while (in.HasMore()) {
 313                 string name;
 314                 in.ReadIdentifier(name);
 315                 in.Skip(io::Token::EQUALS);
 316
 317                 int id = 0;
 318                 if (data.tile_types.Has(name)) {
 319                         id = data.tile_types[name].id;
 320                 } else {
 321                         world::TileType type;
 322                         type.name = name;
 323                         id = data.tile_types.Add(type);
 324                 }
 325
 326                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 327                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 328                         in.ReadIdentifier(name);
 329                         in.Skip(io::Token::EQUALS);
 330                         if (name == "label") {
 331                                 in.ReadString(data.tile_types[id].label);
 332                         } else if (name == "texture") {
 333                                 data.tile_types[id].texture = in.GetInt();
 334                         } else if (name == "shiny") {
 335                                 data.tile_types[id].shiny = in.GetDouble();
 336                         } else if (name == "glossy") {
 337                                 data.tile_types[id].glossy = in.GetDouble();
 338                         } else if (name == "metallic") {
 339                                 data.tile_types[id].metallic = in.GetDouble();
 340                         } else if (name == "yield") {
 341                                 in.Skip(io::Token::BRACKET_OPEN);
 342                                 while (in.Peek().type != io::Token::BRACKET_CLOSE) {
 343                                         world::TileType::Yield yield;
 344                                         in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 345                                         while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 346                                                 in.ReadIdentifier(name);
 347                                                 in.Skip(io::Token::EQUALS);
 348                                                 if (name == "resource") {
 349                                                         in.ReadIdentifier(name);
 350                                                         yield.resource = data.resources[name].id;
 351                                                 } else if (name == "ubiquity") {
 352                                                         yield.ubiquity = in.GetDouble();
 353                                                 } else {
 354                                                         throw std::runtime_error("unknown tile type yield property '" + name + "'");
 355                                                 }
 356                                                 in.Skip(io::Token::SEMICOLON);
 357                                         }
 358                                         in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 359                                         data.tile_types[id].resources.push_back(yield);
 360                                         if (in.Peek().type == io::Token::COMMA) {
 361                                                 in.Skip(io::Token::COMMA);
 362                                         }
 363                                 }
 364                                 in.Skip(io::Token::BRACKET_CLOSE);
 365                         } else {
 366                                 throw std::runtime_error("unknown tile type property '" + name + "'");
 367                         }
 368                         in.Skip(io::Token::SEMICOLON);
 369                 }
 370                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 371                 in.Skip(io::Token::SEMICOLON);
 372         }
 373 }
 374
 375 void Assets::LoadTileTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 376         string path = tile_path + name + ".png";
 377         SDL_Surface *srf = IMG_Load(path.c_str());
 378         if (!srf) {
 379                 throw SDLError("IMG_Load");
 380         }
 381         try {
 382                 tex.Data(layer, *srf);
 383         } catch (...) {
 384                 SDL_FreeSurface(srf);
 385                 throw;
 386         }
 387         SDL_FreeSurface(srf);
 388 }
 389
 390 void Assets::LoadSkinTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 391         string path = skin_path + name + ".png";
 392         SDL_Surface *srf = IMG_Load(path.c_str());
 393         if (!srf) {
 394                 throw SDLError("IMG_Load");
 395         }
 396         try {
 397                 tex.Data(layer, *srf);
 398         } catch (...) {
 399                 SDL_FreeSurface(srf);
 400                 throw;
 401         }
 402         SDL_FreeSurface(srf);
 403 }
 404
 405 void Assets::LoadSkyTexture(const string &name, graphics::CubeMap &cm) const {
 406         string full = sky_path + name;
 407         string right = full + "-right.png";
 408         string left = full + "-left.png";
 409         string top = full + "-top.png";
 410         string bottom = full + "-bottom.png";
 411         string back = full + "-back.png";
 412         string front = full + "-front.png";
 413
 414         SDL_Surface *srf = nullptr;
 415
 416         if (!(srf = IMG_Load(right.c_str()))) throw SDLError("IMG_Load");
 417         try {
 418                 cm.Data(graphics::CubeMap::RIGHT, *srf);
 419         } catch (...) {
 420                 SDL_FreeSurface(srf);
 421                 throw;
 422         }
 423         SDL_FreeSurface(srf);
 424
 425         if (!(srf = IMG_Load(left.c_str()))) throw SDLError("IMG_Load");
 426         try {
 427                 cm.Data(graphics::CubeMap::LEFT, *srf);
 428         } catch (...) {
 429                 SDL_FreeSurface(srf);
 430                 throw;
 431         }
 432         SDL_FreeSurface(srf);
 433
 434         if (!(srf = IMG_Load(top.c_str()))) throw SDLError("IMG_Load");
 435         try {
 436                 cm.Data(graphics::CubeMap::TOP, *srf);
 437         } catch (...) {
 438                 SDL_FreeSurface(srf);
 439                 throw;
 440         }
 441         SDL_FreeSurface(srf);
 442
 443         if (!(srf = IMG_Load(bottom.c_str()))) throw SDLError("IMG_Load");
 444         try {
 445                 cm.Data(graphics::CubeMap::BOTTOM, *srf);
 446         } catch (...) {
 447                 SDL_FreeSurface(srf);
 448                 throw;
 449         }
 450         SDL_FreeSurface(srf);
 451
 452         if (!(srf = IMG_Load(back.c_str()))) throw SDLError("IMG_Load");
 453         try {
 454                 cm.Data(graphics::CubeMap::BACK, *srf);
 455         } catch (...) {
 456                 SDL_FreeSurface(srf);
 457                 throw;
 458         }
 459         SDL_FreeSurface(srf);
 460
 461         if (!(srf = IMG_Load(front.c_str()))) throw SDLError("IMG_Load");
 462         try {
 463                 cm.Data(graphics::CubeMap::FRONT, *srf);
 464         } catch (...) {
 465                 SDL_FreeSurface(srf);
 466                 throw;
 467         }
 468         SDL_FreeSurface(srf);
 469 }
 470
 471 void Assets::LoadUniverse(const string &name, world::Simulation &sim) const {
 472         std::ifstream universe_file(data_path + name);
 473         io::TokenStreamReader universe_reader(universe_file);
 474         ReadBody(universe_reader, sim);
 475         universe_reader.Skip(io::Token::SEMICOLON);
 476 }
 477
 478 world::Body *Assets::ReadBody(io::TokenStreamReader &in, world::Simulation &sim) const {
 479         std::unique_ptr<world::Body> body;
 480         string name;
 481         in.ReadIdentifier(name);
 482         if (name == "Sun") {
 483                 world::Sun *sun = new world::Sun;
 484                 body.reset(sun);
 485                 sim.AddSun(*sun);
 486                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 487                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 488                         in.ReadIdentifier(name);
 489                         in.Skip(io::Token::EQUALS);
 490                         ReadSunProperty(name, in, *sun, sim);
 491                         in.Skip(io::Token::SEMICOLON);
 492                 }
 493                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 494                 in.Skip(io::Token::SEMICOLON);
 495         } else if (name == "Planet") {
 496                 in.Skip(io::Token::PARENTHESIS_OPEN);
 497                 int sidelength = in.GetInt();
 498                 in.Skip(io::Token::PARENTHESIS_CLOSE);
 499                 world::Planet *planet = new world::Planet(sidelength);
 500                 sim.AddPlanet(*planet);
 501                 body.reset(planet);
 502                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 503                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 504                         in.ReadIdentifier(name);
 505                         in.Skip(io::Token::EQUALS);
 506                         ReadPlanetProperty(name, in, *planet, sim);
 507                         in.Skip(io::Token::SEMICOLON);
 508                 }
 509                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 510         } else {
 511                 throw std::runtime_error("unknown body class " + name);
 512         }
 513         return body.release();
 514 }
 515
 516 void Assets::ReadSunProperty(const std::string &name, io::TokenStreamReader &in, world::Sun &sun, world::Simulation &sim) const {
 517         if (name == "color") {
 518                 glm::dvec3 color(0.0);
 519                 in.ReadVec(color);
 520                 sun.Color(color);
 521         } else if (name == "luminosity") {
 522                 sun.Luminosity(in.GetDouble());
 523         } else {
 524                 ReadBodyProperty(name, in, sun, sim);
 525         }
 526 }
 527
 528 void Assets::ReadPlanetProperty(const std::string &name, io::TokenStreamReader &in, world::Planet &planet, world::Simulation &sim) const {
 529         if (name == "generate") {
 530                 string gen;
 531                 in.ReadIdentifier(gen);
 532                 if (gen == "earthlike") {
 533                         world::GenerateEarthlike(data.tile_types, planet);
 534                 } else if (gen == "test") {
 535                         world::GenerateTest(data.tile_types, planet);
 536                 } else {
 537                         throw std::runtime_error("unknown surface generator " + gen);
 538                 }
 539         } else if (name == "atmosphere") {
 540                 string atm;
 541                 in.ReadIdentifier(atm);
 542                 planet.Atmosphere(data.resources[atm].id);
 543         } else {
 544                 ReadBodyProperty(name, in, planet, sim);
 545         }
 546 }
 547
 548 void Assets::ReadBodyProperty(const std::string &name, io::TokenStreamReader &in, world::Body &body, world::Simulation &sim) const {
 549         if (name == "name") {
 550                 string value;
 551                 in.ReadString(value);
 552                 body.Name(value);
 553         } else if (name == "mass") {
 554                 body.Mass(in.GetDouble());
 555         } else if (name == "radius") {
 556                 body.Radius(in.GetDouble());
 557         } else if (name == "axial_tilt") {
 558                 glm::dvec2 tilt(0.0);
 559                 in.ReadVec(tilt);
 560                 body.AxialTilt(tilt);
 561         } else if (name == "rotation") {
 562                 body.Rotation(in.GetDouble());
 563         } else if (name == "angular_momentum") {
 564                 body.AngularMomentum(in.GetDouble());
 565         } else if (name == "orbit") {
 566                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 567                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 568                         string oname;
 569                         in.ReadIdentifier(oname);
 570                         in.Skip(io::Token::EQUALS);
 571                         if (oname == "SMA" || oname == "semi_major_axis") {
 572                                 body.GetOrbit().SemiMajorAxis(in.GetDouble());
 573                         } else if (oname == "ECC" || oname == "eccentricity") {
 574                                 body.GetOrbit().Eccentricity(in.GetDouble());
 575                         } else if (oname == "INC" || oname == "inclination") {
 576                                 body.GetOrbit().Inclination(in.GetDouble());
 577                         } else if (oname == "ASC" || oname == "ascending_node" || oname == "longitude_ascending") {
 578                                 body.GetOrbit().LongitudeAscending(in.GetDouble());
 579                         } else if (oname == "ARG" || oname == "APE" || oname == "argument_periapsis") {
 580                                 body.GetOrbit().ArgumentPeriapsis(in.GetDouble());
 581                         } else if (oname == "MNA" || oname == "mean_anomaly") {
 582                                 body.GetOrbit().MeanAnomaly(in.GetDouble());
 583                         } else {
 584                                 throw std::runtime_error("unknown orbit property " + oname);
 585                         }
 586                         in.Skip(io::Token::SEMICOLON);
 587                 }
 588                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 589         } else if (name == "children") {
 590                 in.Skip(io::Token::BRACKET_OPEN);
 591                 while (in.Peek().type != io::Token::BRACKET_CLOSE) {
 592                         world::Body *b = ReadBody(in, sim);
 593                         b->SetParent(body);
 594                         if (in.Peek().type == io::Token::COMMA) {
 595                                 in.Skip(io::Token::COMMA);
 596                         }
 597                 }
 598                 in.Skip(io::Token::BRACKET_CLOSE);
 599         } else {
 600                 throw std::runtime_error("unknown body property " + name);
 601         }
 602 }
 603
 604 }
 605 }