src/ui/ui.cpp

   1 #include "HUD.hpp"
   2 #include "Interface.hpp"
   3 #include "Keymap.hpp"
   4
   5 #include "../app/Assets.hpp"
   6 #include "../app/Environment.hpp"
   7 #include "../app/FrameCounter.hpp"
   8 #include "../app/init.hpp"
   9 #include "../audio/Audio.hpp"
  10 #include "../graphics/Font.hpp"
  11 #include "../graphics/Viewport.hpp"
  12 #include "../io/TokenStreamReader.hpp"
  13 #include "../model/shapes.hpp"
  14 #include "../world/BlockLookup.hpp"
  15 #include "../world/World.hpp"
  16
  17 #include <algorithm>
  18 #include <cmath>
  19 #include <iostream>
  20 #include <sstream>
  21 #include <glm/gtc/matrix_transform.hpp>
  22 #include <glm/gtx/io.hpp>
  23
  24
  25 namespace blank {
  26
  27 HUD::HUD(const BlockTypeRegistry &types, const Font &font)
  28 : types(types)
  29 , font(font)
  30 , block()
  31 , block_buf()
  32 , block_transform(1.0f)
  33 , block_label()
  34 , block_visible(false)
  35 , crosshair() {
  36         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
  37         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
  38         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
  39         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
  40
  41         OutlineModel::Buffer buf;
  42         buf.vertices = std::vector<glm::vec3>({
  43                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
  44                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
  45         });
  46         buf.indices = std::vector<OutlineModel::Index>({
  47                 0, 1, 2, 3
  48         });
  49         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f });
  50         crosshair.Update(buf);
  51
  52         block_label.Position(
  53                 glm::vec3(50.0f, 85.0f, 0.0f),
  54                 Gravity::NORTH_WEST,
  55                 Gravity::NORTH
  56         );
  57         block_label.Foreground(glm::vec4(1.0f));
  58         block_label.Background(glm::vec4(0.5f));
  59 }
  60
  61
  62 void HUD::DisplayNone() {
  63         block_visible = false;
  64 }
  65
  66 void HUD::Display(const Block &b) {
  67         const BlockType &type = types.Get(b.type);
  68
  69         block_buf.Clear();
  70         type.FillEntityModel(block_buf, b.Transform());
  71         block.Update(block_buf);
  72
  73         block_label.Set(font, type.label);
  74
  75         block_visible = type.visible;
  76 }
  77
  78
  79 void HUD::Render(Viewport &viewport) noexcept {
  80         viewport.ClearDepth();
  81
  82         PlainColor &outline_prog = viewport.HUDOutlineProgram();
  83         viewport.EnableInvertBlending();
  84         viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
  85         outline_prog.SetM(viewport.Cursor());
  86         crosshair.Draw();
  87
  88         if (block_visible) {
  89                 DirectionalLighting &world_prog = viewport.HUDProgram();
  90                 world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
  91                 // disable distance fog
  92                 world_prog.SetFogDensity(0.0f);
  93
  94                 viewport.DisableBlending();
  95                 world_prog.SetM(block_transform);
  96                 block.Draw();
  97                 block_label.Render(viewport);
  98         }
  99 }
 100
 101
 102 Interface::Interface(
 103         const Config &config,
 104         Environment &env,
 105         World &world,
 106         const Player &player)
 107 : env(env)
 108 , world(world)
 109 , player(player)
 110 , ctrl(*player.entity)
 111 , hud(world.BlockTypes(), env.assets.small_ui_font)
 112 , aim{{ 0, 0, 0 }, { 0, 0, -1 }}
 113 , aim_world()
 114 , aim_entity()
 115 , outline()
 116 , outline_transform(1.0f)
 117 , counter_text()
 118 , position_text()
 119 , orientation_text()
 120 , block_text()
 121 , last_block()
 122 , last_entity(nullptr)
 123 , messages(env.assets.small_ui_font)
 124 , msg_timer(5000)
 125 , config(config)
 126 , place_timer(256)
 127 , remove_timer(256)
 128 , remove(0)
 129 , selection(0)
 130 , place_sound(env.loader.LoadSound("thump"))
 131 , remove_sound(env.loader.LoadSound("plop"))
 132 , fwd(0)
 133 , rev(0)
 134 , debug(false) {
 135         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 136         counter_text.Foreground(glm::vec4(1.0f));
 137         counter_text.Background(glm::vec4(0.5f));
 138         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 139         position_text.Foreground(glm::vec4(1.0f));
 140         position_text.Background(glm::vec4(0.5f));
 141         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 142         orientation_text.Foreground(glm::vec4(1.0f));
 143         orientation_text.Background(glm::vec4(0.5f));
 144         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 145         block_text.Foreground(glm::vec4(1.0f));
 146         block_text.Background(glm::vec4(0.5f));
 147         block_text.Set(env.assets.small_ui_font, "Block: none");
 148         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 149         entity_text.Foreground(glm::vec4(1.0f));
 150         entity_text.Background(glm::vec4(0.5f));
 151         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 152         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 153         messages.Foreground(glm::vec4(1.0f));
 154         messages.Background(glm::vec4(0.5f));
 155         hud.DisplayNone();
 156 }
 157
 158
 159 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 160         if (config.keyboard_disabled) return;
 161
 162         switch (env.keymap.Lookup(event)) {
 163                 case Keymap::MOVE_FORWARD:
 164                         rev.z = 1;
 165                         break;
 166                 case Keymap::MOVE_BACKWARD:
 167                         fwd.z = 1;
 168                         break;
 169                 case Keymap::MOVE_LEFT:
 170                         rev.x = 1;
 171                         break;
 172                 case Keymap::MOVE_RIGHT:
 173                         fwd.x = 1;
 174                         break;
 175                 case Keymap::MOVE_UP:
 176                         fwd.y = 1;
 177                         break;
 178                 case Keymap::MOVE_DOWN:
 179                         rev.y = 1;
 180                         break;
 181
 182                 case Keymap::BLOCK_FACE:
 183                         FaceBlock();
 184                         break;
 185                 case Keymap::BLOCK_TURN:
 186                         TurnBlock();
 187                         break;
 188                 case Keymap::BLOCK_NEXT:
 189                         SelectNext();
 190                         break;
 191                 case Keymap::BLOCK_PREV:
 192                         SelectPrevious();
 193                         break;
 194
 195                 case Keymap::BLOCK_PLACE:
 196                         PlaceBlock();
 197                         break;
 198                 case Keymap::BLOCK_PICK:
 199                         PickBlock();
 200                         break;
 201                 case Keymap::BLOCK_REMOVE:
 202                         RemoveBlock();
 203                         break;
 204
 205                 case Keymap::TOGGLE_COLLISION:
 206                         ToggleCollision();
 207                         break;
 208
 209                 case Keymap::TOGGLE_VISUAL:
 210                         ToggleVisual();
 211                         break;
 212                 case Keymap::TOGGLE_DEBUG:
 213                         ToggleDebug();
 214                         break;
 215                 case Keymap::TOGGLE_AUDIO:
 216                         ToggleAudio();
 217                         break;
 218
 219                 case Keymap::EXIT:
 220                         env.state.Pop();
 221                         break;
 222
 223                 default:
 224                         break;
 225         }
 226 }
 227
 228 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 229         if (config.keyboard_disabled) return;
 230
 231         switch (env.keymap.Lookup(event)) {
 232                 case Keymap::MOVE_FORWARD:
 233                         rev.z = 0;
 234                         break;
 235                 case Keymap::MOVE_BACKWARD:
 236                         fwd.z = 0;
 237                         break;
 238                 case Keymap::MOVE_LEFT:
 239                         rev.x = 0;
 240                         break;
 241                 case Keymap::MOVE_RIGHT:
 242                         fwd.x = 0;
 243                         break;
 244                 case Keymap::MOVE_UP:
 245                         fwd.y = 0;
 246                         break;
 247                 case Keymap::MOVE_DOWN:
 248                         rev.y = 0;
 249                         break;
 250
 251                 default:
 252                         break;
 253         }
 254 }
 255
 256 void Interface::FaceBlock() {
 257         selection.SetFace(Block::Face((selection.GetFace() + 1) % Block::FACE_COUNT));
 258         hud.Display(selection);
 259 }
 260
 261 void Interface::TurnBlock() {
 262         selection.SetTurn(Block::Turn((selection.GetTurn() + 1) % Block::TURN_COUNT));
 263         hud.Display(selection);
 264 }
 265
 266 void Interface::ToggleCollision() {
 267         ctrl.Controlled().WorldCollidable(!ctrl.Controlled().WorldCollidable());
 268         if (ctrl.Controlled().WorldCollidable()) {
 269                 PostMessage("collision on");
 270         } else {
 271                 PostMessage("collision off");
 272         }
 273 }
 274
 275 void Interface::ToggleAudio() {
 276         config.audio_disabled = !config.audio_disabled;
 277         if (config.audio_disabled) {
 278                 PostMessage("audio off");
 279         } else {
 280                 PostMessage("audio on");
 281         }
 282 }
 283
 284 void Interface::ToggleVisual() {
 285         config.visual_disabled = !config.visual_disabled;
 286         if (config.visual_disabled) {
 287                 PostMessage("visual off");
 288         } else {
 289                 PostMessage("visual on");
 290         }
 291 }
 292
 293 void Interface::ToggleDebug() {
 294         debug = !debug;
 295         if (debug) {
 296                 UpdateCounter();
 297                 UpdatePosition();
 298                 UpdateOrientation();
 299                 UpdateBlockInfo();
 300                 UpdateEntityInfo();
 301         }
 302 }
 303
 304 void Interface::UpdateCounter() {
 305         std::stringstream s;
 306         s << std::setprecision(3) <<
 307                 "avg: " << env.counter.Average().running << "ms, "
 308                 "peak: " << env.counter.Peak().running << "ms";
 309         std::string text = s.str();
 310         counter_text.Set(env.assets.small_ui_font, text);
 311 }
 312
 313 void Interface::UpdatePosition() {
 314         std::stringstream s;
 315         s << std::setprecision(3) << "pos: " << ctrl.Controlled().AbsolutePosition();
 316         position_text.Set(env.assets.small_ui_font, s.str());
 317 }
 318
 319 void Interface::UpdateOrientation() {
 320         std::stringstream s;
 321         s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 322                 << ", yaw: " << rad2deg(ctrl.Yaw());
 323         orientation_text.Set(env.assets.small_ui_font, s.str());
 324 }
 325
 326 void Interface::UpdateBlockInfo() {
 327         if (aim_world) {
 328                 const Block &block = aim_world.GetBlock();
 329                 if (last_block != block) {
 330                         std::stringstream s;
 331                         s << "Block: "
 332                                 << aim_world.GetType().label
 333                                 << ", face: " << block.GetFace()
 334                                 << ", turn: " << block.GetTurn();
 335                         block_text.Set(env.assets.small_ui_font, s.str());
 336                         last_block = block;
 337                 }
 338         } else {
 339                 if (last_block != Block()) {
 340                         std::stringstream s;
 341                         s << "Block: none";
 342                         block_text.Set(env.assets.small_ui_font, s.str());
 343                         last_block = Block();
 344                 }
 345         }
 346 }
 347
 348 void Interface::UpdateEntityInfo() {
 349         if (aim_entity) {
 350                 if (last_entity != aim_entity.entity) {
 351                         std::stringstream s;
 352                         s << "Entity: " << aim_entity.entity->Name();
 353                         entity_text.Set(env.assets.small_ui_font, s.str());
 354                         last_entity = aim_entity.entity;
 355                 }
 356         }
 357 }
 358
 359
 360 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 361         if (config.mouse_disabled) return;
 362         ctrl.RotateYaw(event.xrel * config.yaw_sensitivity);
 363         ctrl.RotatePitch(event.yrel * config.pitch_sensitivity);
 364 }
 365
 366 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 367         if (config.mouse_disabled) return;
 368
 369         if (event.button == SDL_BUTTON_LEFT) {
 370                 RemoveBlock();
 371                 remove_timer.Start();
 372         } else if (event.button == SDL_BUTTON_MIDDLE) {
 373                 PickBlock();
 374         } else if (event.button == SDL_BUTTON_RIGHT) {
 375                 PlaceBlock();
 376                 place_timer.Start();
 377         }
 378 }
 379
 380 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 381         if (config.mouse_disabled) return;
 382
 383         if (event.button == SDL_BUTTON_LEFT) {
 384                 remove_timer.Stop();
 385         } else if (event.button == SDL_BUTTON_RIGHT) {
 386                 place_timer.Stop();
 387         }
 388 }
 389
 390 void Interface::PickBlock() {
 391         if (!aim_world) return;
 392         selection = aim_world.GetBlock();
 393         hud.Display(selection);
 394 }
 395
 396 void Interface::PlaceBlock() {
 397         if (!aim_world) return;
 398
 399         BlockLookup next_block(aim_world.chunk, aim_world.BlockPos(), Block::NormalFace(aim_world.normal));
 400         if (!next_block) {
 401                 return;
 402         }
 403         next_block.SetBlock(selection);
 404
 405         if (config.audio_disabled) return;
 406         const Entity &player = ctrl.Controlled();
 407         env.audio.Play(
 408                 place_sound,
 409                 next_block.GetChunk().ToSceneCoords(player.ChunkCoords(), next_block.GetBlockCoords())
 410         );
 411 }
 412
 413 void Interface::RemoveBlock() noexcept {
 414         if (!aim_world) return;
 415         aim_world.SetBlock(remove);
 416
 417         if (config.audio_disabled) return;
 418         const Entity &player = ctrl.Controlled();
 419         env.audio.Play(
 420                 remove_sound,
 421                 aim_world.GetChunk().ToSceneCoords(player.ChunkCoords(), aim_world.BlockCoords())
 422         );
 423 }
 424
 425
 426 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 427         if (config.mouse_disabled) return;
 428
 429         if (event.y < 0) {
 430                 SelectNext();
 431         } else if (event.y > 0) {
 432                 SelectPrevious();
 433         }
 434 }
 435
 436 void Interface::SelectNext() {
 437         ++selection.type;
 438         if (size_t(selection.type) >= world.BlockTypes().Size()) {
 439                 selection.type = 1;
 440         }
 441         hud.Display(selection);
 442 }
 443
 444 void Interface::SelectPrevious() {
 445         --selection.type;
 446         if (selection.type <= 0) {
 447                 selection.type = world.BlockTypes().Size() - 1;
 448         }
 449         hud.Display(selection);
 450 }
 451
 452
 453 void Interface::PostMessage(const char *msg) {
 454         messages.PushLine(msg);
 455         msg_timer.Reset();
 456         msg_timer.Start();
 457         std::cout << msg << std::endl;
 458 }
 459
 460
 461 void Interface::Update(int dt) {
 462         ctrl.Velocity(glm::vec3(fwd - rev) * config.move_velocity);
 463         ctrl.Update(dt);
 464
 465         msg_timer.Update(dt);
 466         place_timer.Update(dt);
 467         remove_timer.Update(dt);
 468
 469         aim = ctrl.Aim();
 470         CheckAim();
 471
 472         if (msg_timer.HitOnce()) {
 473                 msg_timer.Stop();
 474         }
 475
 476         if (remove_timer.Hit()) {
 477                 RemoveBlock();
 478                 CheckAim();
 479         }
 480
 481         if (place_timer.Hit()) {
 482                 PlaceBlock();
 483                 CheckAim();
 484         }
 485
 486         if (debug) {
 487                 if (env.counter.Changed()) {
 488                         UpdateCounter();
 489                 }
 490                 UpdatePosition();
 491                 UpdateOrientation();
 492         }
 493 }
 494
 495 namespace {
 496
 497 OutlineModel::Buffer outl_buf;
 498
 499 }
 500
 501 void Interface::CheckAim() {
 502         if (!world.Intersection(aim, glm::mat4(1.0f), ctrl.Controlled().ChunkCoords(), aim_world)) {
 503                 aim_world = WorldCollision();
 504         }
 505         if (!world.Intersection(aim, glm::mat4(1.0f), ctrl.Controlled(), aim_entity)) {
 506                 aim_entity = EntityCollision();
 507         }
 508         if (aim_world && aim_entity) {
 509                 // got both, pick the closest one
 510                 if (aim_world.depth < aim_entity.depth) {
 511                         UpdateOutline();
 512                         aim_entity = EntityCollision();
 513                 } else {
 514                         aim_world = WorldCollision();
 515                 }
 516         } else if (aim_world) {
 517                 UpdateOutline();
 518         }
 519         if (debug) {
 520                 UpdateBlockInfo();
 521                 UpdateEntityInfo();
 522         }
 523 }
 524
 525 void Interface::UpdateOutline() {
 526         outl_buf.Clear();
 527         aim_world.GetType().FillOutlineModel(outl_buf);
 528         outline.Update(outl_buf);
 529         outline_transform = aim_world.GetChunk().Transform(player.entity->ChunkCoords());
 530         outline_transform *= aim_world.BlockTransform();
 531         outline_transform *= glm::scale(glm::vec3(1.005f));
 532 }
 533
 534
 535 void Interface::Render(Viewport &viewport) noexcept {
 536         if (config.visual_disabled) return;
 537
 538         if (aim_world) {
 539                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 540                 outline_prog.SetM(outline_transform);
 541                 outline.Draw();
 542         }
 543
 544         if (debug) {
 545                 counter_text.Render(viewport);
 546                 position_text.Render(viewport);
 547                 orientation_text.Render(viewport);
 548                 if (aim_world) {
 549                         block_text.Render(viewport);
 550                 } else if (aim_entity) {
 551                         entity_text.Render(viewport);
 552                 }
 553         }
 554
 555         if (msg_timer.Running()) {
 556                 messages.Render(viewport);
 557         }
 558
 559         hud.Render(viewport);
 560 }
 561
 562
 563 Keymap::Keymap()
 564 : codemap{ NONE } {
 565
 566 }
 567
 568 void Keymap::Map(SDL_Scancode scancode, Action action) {
 569         if (scancode > MAX_SCANCODE) {
 570                 throw std::runtime_error("refusing to map scancode: too damn high");
 571         }
 572         codemap[scancode] = action;
 573 }
 574
 575 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) {
 576         if (scancode < NUM_SCANCODES) {
 577                 return codemap[scancode];
 578         } else {
 579                 return NONE;
 580         }
 581 }
 582
 583
 584 void Keymap::LoadDefault() {
 585         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 586         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 587         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 588         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 589         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 590         Map(SDL_SCANCODE_A, MOVE_LEFT);
 591         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 592         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 593         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 594         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 595         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 596         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 597         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 598
 599         Map(SDL_SCANCODE_Q, BLOCK_FACE);
 600         Map(SDL_SCANCODE_E, BLOCK_TURN);
 601         Map(SDL_SCANCODE_TAB, BLOCK_NEXT);
 602         Map(SDL_SCANCODE_RIGHTBRACKET, BLOCK_NEXT);
 603         Map(SDL_SCANCODE_LEFTBRACKET, BLOCK_PREV);
 604
 605         Map(SDL_SCANCODE_INSERT, BLOCK_PLACE);
 606         Map(SDL_SCANCODE_RETURN, BLOCK_PLACE);
 607         Map(SDL_SCANCODE_MENU, BLOCK_PICK);
 608         Map(SDL_SCANCODE_DELETE, BLOCK_REMOVE);
 609         Map(SDL_SCANCODE_BACKSPACE, BLOCK_REMOVE);
 610
 611         Map(SDL_SCANCODE_N, TOGGLE_COLLISION);
 612         Map(SDL_SCANCODE_F1, TOGGLE_VISUAL);
 613         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 614         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 615
 616         Map(SDL_SCANCODE_ESCAPE, EXIT);
 617 }
 618
 619
 620 void Keymap::Load(std::istream &is) {
 621         TokenStreamReader in(is);
 622         std::string key_name;
 623         std::string action_name;
 624         SDL_Scancode key;
 625         Action action;
 626         while (in.HasMore()) {
 627                 if (in.Peek().type == Token::STRING) {
 628                         in.ReadString(key_name);
 629                         key = SDL_GetScancodeFromName(key_name.c_str());
 630                 } else {
 631                         key = SDL_Scancode(in.GetInt());
 632                 }
 633                 in.Skip(Token::EQUALS);
 634                 in.ReadIdentifier(action_name);
 635                 action = StringToAction(action_name);
 636                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 637                         in.Skip(Token::SEMICOLON);
 638                 }
 639                 Map(key, action);
 640         }
 641 }
 642
 643 void Keymap::Save(std::ostream &out) {
 644         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 645                 if (codemap[i] == NONE) continue;
 646
 647                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 648                 if (str && *str) {
 649                         out << '"';
 650                         while (*str) {
 651                                 if (*str == '"') {
 652                                         out << "\\\"";
 653                                 } else {
 654                                         out << *str;
 655                                 }
 656                                 ++str;
 657                         }
 658                         out << '"';
 659                 } else {
 660                         out << i;
 661                 }
 662
 663                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 664         }
 665 }
 666
 667
 668 const char *Keymap::ActionToString(Action action) {
 669         switch (action) {
 670                 default:
 671                 case NONE:
 672                         return "none";
 673                 case MOVE_FORWARD:
 674                         return "move_forward";
 675                 case MOVE_BACKWARD:
 676                         return "move_backward";
 677                 case MOVE_LEFT:
 678                         return "move_left";
 679                 case MOVE_RIGHT:
 680                         return "move_right";
 681                 case MOVE_UP:
 682                         return "move_up";
 683                 case MOVE_DOWN:
 684                         return "move_down";
 685                 case BLOCK_FACE:
 686                         return "block_face";
 687                 case BLOCK_TURN:
 688                         return "block_turn";
 689                 case BLOCK_NEXT:
 690                         return "block_next";
 691                 case BLOCK_PREV:
 692                         return "block_prev";
 693                 case BLOCK_PLACE:
 694                         return "block_place";
 695                 case BLOCK_PICK:
 696                         return "block_pick";
 697                 case BLOCK_REMOVE:
 698                         return "block_remove";
 699                 case TOGGLE_COLLISION:
 700                         return "toggle_collision";
 701                 case TOGGLE_AUDIO:
 702                         return "toggle_audio";
 703                 case TOGGLE_VISUAL:
 704                         return "toggle_visual";
 705                 case TOGGLE_DEBUG:
 706                         return "toggle_debug";
 707                 case EXIT:
 708                         return "exit";
 709         }
 710 }
 711
 712 Keymap::Action Keymap::StringToAction(const std::string &str) {
 713         if (str == "move_forward") {
 714                 return MOVE_FORWARD;
 715         } else if (str == "move_backward") {
 716                 return MOVE_BACKWARD;
 717         } else if (str == "move_left") {
 718                 return MOVE_LEFT;
 719         } else if (str == "move_right") {
 720                 return MOVE_RIGHT;
 721         } else if (str == "move_up") {
 722                 return MOVE_UP;
 723         } else if (str == "move_down") {
 724                 return MOVE_DOWN;
 725         } else if (str == "block_face") {
 726                 return BLOCK_FACE;
 727         } else if (str == "block_turn") {
 728                 return BLOCK_TURN;
 729         } else if (str == "block_next") {
 730                 return BLOCK_NEXT;
 731         } else if (str == "block_prev") {
 732                 return BLOCK_PREV;
 733         } else if (str == "block_place") {
 734                 return BLOCK_PLACE;
 735         } else if (str == "block_pick") {
 736                 return BLOCK_PICK;
 737         } else if (str == "block_remove") {
 738                 return BLOCK_REMOVE;
 739         } else if (str == "toggle_collision") {
 740                 return TOGGLE_COLLISION;
 741         } else if (str == "toggle_audio") {
 742                 return TOGGLE_AUDIO;
 743         } else if (str == "toggle_visual") {
 744                 return TOGGLE_VISUAL;
 745         } else if (str == "toggle_debug") {
 746                 return TOGGLE_DEBUG;
 747         } else if (str == "exit") {
 748                 return EXIT;
 749         } else {
 750                 return NONE;
 751         }
 752 }
 753
 754 }