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/World.hpp"
  15
  16 #include <algorithm>
  17 #include <cmath>
  18 #include <iostream>
  19 #include <sstream>
  20 #include <glm/gtc/matrix_transform.hpp>
  21 #include <glm/gtx/io.hpp>
  22
  23
  24 namespace blank {
  25
  26 HUD::HUD(const BlockTypeRegistry &types, const Font &font)
  27 : types(types)
  28 , font(font)
  29 , block()
  30 , block_buf()
  31 , block_transform(1.0f)
  32 , block_label()
  33 , block_visible(false)
  34 , crosshair() {
  35         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
  36         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
  37         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
  38         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
  39
  40         OutlineModel::Buffer buf;
  41         buf.vertices = std::vector<glm::vec3>({
  42                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
  43                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
  44         });
  45         buf.indices = std::vector<OutlineModel::Index>({
  46                 0, 1, 2, 3
  47         });
  48         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f });
  49         crosshair.Update(buf);
  50
  51         block_label.Position(
  52                 glm::vec3(50.0f, 85.0f, 0.0f),
  53                 Gravity::NORTH_WEST,
  54                 Gravity::NORTH
  55         );
  56         block_label.Foreground(glm::vec4(1.0f));
  57         block_label.Background(glm::vec4(0.5f));
  58 }
  59
  60
  61 void HUD::Display(const Block &b) {
  62         const BlockType &type = types.Get(b.type);
  63
  64         block_buf.Clear();
  65         type.FillEntityModel(block_buf, b.Transform());
  66         block.Update(block_buf);
  67
  68         block_label.Set(font, type.label);
  69
  70         block_visible = type.visible;
  71 }
  72
  73
  74 void HUD::Render(Viewport &viewport) noexcept {
  75         viewport.ClearDepth();
  76
  77         PlainColor &outline_prog = viewport.HUDOutlineProgram();
  78         viewport.EnableInvertBlending();
  79         viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
  80         outline_prog.SetM(viewport.Cursor());
  81         crosshair.Draw();
  82
  83         if (block_visible) {
  84                 DirectionalLighting &world_prog = viewport.HUDProgram();
  85                 world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
  86                 // disable distance fog
  87                 world_prog.SetFogDensity(0.0f);
  88
  89                 viewport.DisableBlending();
  90                 world_prog.SetM(block_transform);
  91                 block.Draw();
  92                 block_label.Render(viewport);
  93         }
  94 }
  95
  96
  97 Interface::Interface(
  98         const Config &config,
  99         Environment &env,
 100         World &world)
 101 : env(env)
 102 , world(world)
 103 , ctrl(world.Player())
 104 , hud(world.BlockTypes(), env.assets.small_ui_font)
 105 , aim{{ 0, 0, 0 }, { 0, 0, -1 }}
 106 , aim_chunk(nullptr)
 107 , aim_block(0)
 108 , aim_normal()
 109 , outline()
 110 , outline_transform(1.0f)
 111 , counter_text()
 112 , position_text()
 113 , orientation_text()
 114 , messages(env.assets.small_ui_font)
 115 , msg_timer(5000)
 116 , config(config)
 117 , place_timer(256)
 118 , remove_timer(256)
 119 , remove(0)
 120 , selection(1)
 121 , place_sound(env.assets.LoadSound("thump"))
 122 , remove_sound(env.assets.LoadSound("plop"))
 123 , fwd(0)
 124 , rev(0)
 125 , debug(false) {
 126         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 127         counter_text.Foreground(glm::vec4(1.0f));
 128         counter_text.Background(glm::vec4(0.5f));
 129         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 130         position_text.Foreground(glm::vec4(1.0f));
 131         position_text.Background(glm::vec4(0.5f));
 132         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 133         orientation_text.Foreground(glm::vec4(1.0f));
 134         orientation_text.Background(glm::vec4(0.5f));
 135         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 136         messages.Foreground(glm::vec4(1.0f));
 137         messages.Background(glm::vec4(0.5f));
 138         hud.Display(selection);
 139 }
 140
 141
 142 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 143         if (config.keyboard_disabled) return;
 144
 145         switch (env.keymap.Lookup(event)) {
 146                 case Keymap::MOVE_FORWARD:
 147                         rev.z = 1;
 148                         break;
 149                 case Keymap::MOVE_BACKWARD:
 150                         fwd.z = 1;
 151                         break;
 152                 case Keymap::MOVE_LEFT:
 153                         rev.x = 1;
 154                         break;
 155                 case Keymap::MOVE_RIGHT:
 156                         fwd.x = 1;
 157                         break;
 158                 case Keymap::MOVE_UP:
 159                         fwd.y = 1;
 160                         break;
 161                 case Keymap::MOVE_DOWN:
 162                         rev.y = 1;
 163                         break;
 164
 165                 case Keymap::BLOCK_FACE:
 166                         FaceBlock();
 167                         break;
 168                 case Keymap::BLOCK_TURN:
 169                         TurnBlock();
 170                         break;
 171                 case Keymap::BLOCK_NEXT:
 172                         SelectNext();
 173                         break;
 174                 case Keymap::BLOCK_PREV:
 175                         SelectPrevious();
 176                         break;
 177
 178                 case Keymap::BLOCK_PLACE:
 179                         PlaceBlock();
 180                         break;
 181                 case Keymap::BLOCK_PICK:
 182                         PickBlock();
 183                         break;
 184                 case Keymap::BLOCK_REMOVE:
 185                         RemoveBlock();
 186                         break;
 187
 188                 case Keymap::TOGGLE_COLLISION:
 189                         ToggleCollision();
 190                         break;
 191
 192                 case Keymap::PRINT_BLOCK:
 193                         PrintBlockInfo();
 194                         break;
 195                 case Keymap::PRINT_CHUNK:
 196                         PrintChunkInfo();
 197                         break;
 198                 case Keymap::PRINT_LIGHT:
 199                         PrintLightInfo();
 200                         break;
 201                 case Keymap::PRINT_SELECTION:
 202                         PrintSelectionInfo();
 203                         break;
 204
 205                 case Keymap::TOGGLE_VISUAL:
 206                         ToggleVisual();
 207                         break;
 208                 case Keymap::TOGGLE_DEBUG:
 209                         ToggleDebug();
 210                         break;
 211                 case Keymap::TOGGLE_AUDIO:
 212                         ToggleAudio();
 213                         break;
 214
 215                 case Keymap::EXIT:
 216                         env.state.Pop();
 217                         break;
 218
 219                 default:
 220                         break;
 221         }
 222 }
 223
 224 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 225         if (config.keyboard_disabled) return;
 226
 227         switch (env.keymap.Lookup(event)) {
 228                 case Keymap::MOVE_FORWARD:
 229                         rev.z = 0;
 230                         break;
 231                 case Keymap::MOVE_BACKWARD:
 232                         fwd.z = 0;
 233                         break;
 234                 case Keymap::MOVE_LEFT:
 235                         rev.x = 0;
 236                         break;
 237                 case Keymap::MOVE_RIGHT:
 238                         fwd.x = 0;
 239                         break;
 240                 case Keymap::MOVE_UP:
 241                         fwd.y = 0;
 242                         break;
 243                 case Keymap::MOVE_DOWN:
 244                         rev.y = 0;
 245                         break;
 246
 247                 default:
 248                         break;
 249         }
 250 }
 251
 252 void Interface::FaceBlock() {
 253         selection.SetFace(Block::Face((selection.GetFace() + 1) % Block::FACE_COUNT));
 254         hud.Display(selection);
 255 }
 256
 257 void Interface::TurnBlock() {
 258         selection.SetTurn(Block::Turn((selection.GetTurn() + 1) % Block::TURN_COUNT));
 259         hud.Display(selection);
 260 }
 261
 262 void Interface::ToggleCollision() {
 263         ctrl.Controlled().WorldCollidable(!ctrl.Controlled().WorldCollidable());
 264         if (ctrl.Controlled().WorldCollidable()) {
 265                 PostMessage("collision on");
 266         } else {
 267                 PostMessage("collision off");
 268         }
 269 }
 270
 271 void Interface::PrintBlockInfo() {
 272         std::cout << std::endl;
 273         if (!aim_chunk) {
 274                 PostMessage("not looking at any block");
 275                 Ray aim = ctrl.Aim();
 276                 std::stringstream s;
 277                 s << "aim ray: " << aim.orig << ", " << aim.dir;
 278                 PostMessage(s.str());
 279                 return;
 280         }
 281         std::stringstream s;
 282         s << "looking at block " << aim_block
 283                 << " " << Chunk::ToCoords(aim_block)
 284                 << " of chunk " << aim_chunk->Position()
 285         ;
 286         PostMessage(s.str());
 287         Print(aim_chunk->BlockAt(aim_block));
 288 }
 289
 290 void Interface::PrintChunkInfo() {
 291         std::cout << std::endl;
 292         if (!aim_chunk) {
 293                 PostMessage("not looking at any block");
 294                 return;
 295         }
 296         std::stringstream s;
 297         s << "looking at chunk " << aim_chunk->Position();
 298         PostMessage(s.str());
 299
 300         PostMessage("  neighbors:");
 301         if (aim_chunk->HasNeighbor(Block::FACE_LEFT)) {
 302                 s.str("");
 303                 s << " left  " << aim_chunk->GetNeighbor(Block::FACE_LEFT).Position();
 304                 PostMessage(s.str());
 305         }
 306         if (aim_chunk->HasNeighbor(Block::FACE_RIGHT)) {
 307                 s.str("");
 308                 s << " right " << aim_chunk->GetNeighbor(Block::FACE_RIGHT).Position();
 309                 PostMessage(s.str());
 310         }
 311         if (aim_chunk->HasNeighbor(Block::FACE_UP)) {
 312                 s.str("");
 313                 s << " up    " << aim_chunk->GetNeighbor(Block::FACE_UP).Position();
 314                 PostMessage(s.str());
 315         }
 316         if (aim_chunk->HasNeighbor(Block::FACE_DOWN)) {
 317                 s.str("");
 318                 s << " down  " << aim_chunk->GetNeighbor(Block::FACE_DOWN).Position();
 319                 PostMessage(s.str());
 320         }
 321         if (aim_chunk->HasNeighbor(Block::FACE_FRONT)) {
 322                 s.str("");
 323                 s << " front " << aim_chunk->GetNeighbor(Block::FACE_FRONT).Position();
 324                 PostMessage(s.str());
 325         }
 326         if (aim_chunk->HasNeighbor(Block::FACE_BACK)) {
 327                 s.str("");
 328                 s << " back  " << aim_chunk->GetNeighbor(Block::FACE_BACK).Position();
 329                 PostMessage(s.str());
 330         }
 331         std::cout << std::endl;
 332 }
 333
 334 void Interface::PrintLightInfo() {
 335         std::stringstream s;
 336         s
 337                 << "light level " << world.PlayerChunk().GetLight(world.Player().Position())
 338                 << " at position " << world.Player().Position()
 339         ;
 340         PostMessage(s.str());
 341 }
 342
 343 void Interface::PrintSelectionInfo() {
 344         std::cout << std::endl;
 345         Print(selection);
 346 }
 347
 348 void Interface::Print(const Block &block) {
 349         std::stringstream s;
 350         s << "type: " << block.type
 351                 << ", face: " << block.GetFace()
 352                 << ", turn: " << block.GetTurn()
 353         ;
 354         PostMessage(s.str());
 355 }
 356
 357 void Interface::ToggleAudio() {
 358         config.audio_disabled = !config.audio_disabled;
 359         if (config.audio_disabled) {
 360                 PostMessage("audio off");
 361         } else {
 362                 PostMessage("audio on");
 363         }
 364 }
 365
 366 void Interface::ToggleVisual() {
 367         config.visual_disabled = !config.visual_disabled;
 368         if (config.visual_disabled) {
 369                 PostMessage("visual off");
 370         } else {
 371                 PostMessage("visual on");
 372         }
 373 }
 374
 375 void Interface::ToggleDebug() {
 376         debug = !debug;
 377         if (debug) {
 378                 UpdateCounter();
 379                 UpdatePosition();
 380                 UpdateOrientation();
 381         }
 382 }
 383
 384 void Interface::UpdateCounter() {
 385         std::stringstream s;
 386         s << std::setprecision(3) <<
 387                 "avg: " << env.counter.Average().running << "ms, "
 388                 "peak: " << env.counter.Peak().running << "ms";
 389         std::string text = s.str();
 390         counter_text.Set(env.assets.small_ui_font, text);
 391 }
 392
 393 void Interface::UpdatePosition() {
 394         std::stringstream s;
 395         s << std::setprecision(3) << "pos: " << ctrl.Controlled().AbsolutePosition();
 396         position_text.Set(env.assets.small_ui_font, s.str());
 397 }
 398
 399 void Interface::UpdateOrientation() {
 400         std::stringstream s;
 401         s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 402                 << ", yaw: " << rad2deg(ctrl.Yaw());
 403         orientation_text.Set(env.assets.small_ui_font, s.str());
 404 }
 405
 406
 407 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 408         if (config.mouse_disabled) return;
 409         ctrl.RotateYaw(event.xrel * config.yaw_sensitivity);
 410         ctrl.RotatePitch(event.yrel * config.pitch_sensitivity);
 411 }
 412
 413 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 414         if (config.mouse_disabled) return;
 415
 416         if (event.button == SDL_BUTTON_LEFT) {
 417                 RemoveBlock();
 418                 remove_timer.Start();
 419         } else if (event.button == SDL_BUTTON_MIDDLE) {
 420                 PickBlock();
 421         } else if (event.button == SDL_BUTTON_RIGHT) {
 422                 PlaceBlock();
 423                 place_timer.Start();
 424         }
 425 }
 426
 427 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 428         if (config.mouse_disabled) return;
 429
 430         if (event.button == SDL_BUTTON_LEFT) {
 431                 remove_timer.Stop();
 432         } else if (event.button == SDL_BUTTON_RIGHT) {
 433                 place_timer.Stop();
 434         }
 435 }
 436
 437 void Interface::PickBlock() {
 438         if (!aim_chunk) return;
 439         selection = aim_chunk->BlockAt(aim_block);
 440         hud.Display(selection);
 441 }
 442
 443 void Interface::PlaceBlock() {
 444         if (!aim_chunk) return;
 445         Chunk *mod_chunk = aim_chunk;
 446         glm::vec3 next_pos = Chunk::ToCoords(aim_block) + aim_normal;
 447         if (!Chunk::InBounds(next_pos)) {
 448                 mod_chunk = &world.Next(*aim_chunk, aim_normal);
 449                 next_pos -= aim_normal * glm::vec3(Chunk::Extent());
 450         }
 451         mod_chunk->SetBlock(next_pos, selection);
 452
 453         if (config.audio_disabled) return;
 454         const Entity &player = ctrl.Controlled();
 455         env.audio.Play(
 456                 place_sound,
 457                 mod_chunk->ToSceneCoords(player.ChunkCoords(), next_pos)
 458         );
 459 }
 460
 461 void Interface::RemoveBlock() noexcept {
 462         if (!aim_chunk) return;
 463         aim_chunk->SetBlock(aim_block, remove);
 464
 465         if (config.audio_disabled) return;
 466         const Entity &player = ctrl.Controlled();
 467         env.audio.Play(
 468                 remove_sound,
 469                 aim_chunk->ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(aim_block))
 470         );
 471 }
 472
 473
 474 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 475         if (config.mouse_disabled) return;
 476
 477         if (event.y < 0) {
 478                 SelectNext();
 479         } else if (event.y > 0) {
 480                 SelectPrevious();
 481         }
 482 }
 483
 484 void Interface::SelectNext() {
 485         ++selection.type;
 486         if (size_t(selection.type) >= world.BlockTypes().Size()) {
 487                 selection.type = 1;
 488         }
 489         hud.Display(selection);
 490 }
 491
 492 void Interface::SelectPrevious() {
 493         --selection.type;
 494         if (selection.type <= 0) {
 495                 selection.type = world.BlockTypes().Size() - 1;
 496         }
 497         hud.Display(selection);
 498 }
 499
 500
 501 void Interface::PostMessage(const char *msg) {
 502         messages.PushLine(msg);
 503         msg_timer.Reset();
 504         msg_timer.Start();
 505         std::cout << msg << std::endl;
 506 }
 507
 508
 509 void Interface::Update(int dt) {
 510         ctrl.Velocity(glm::vec3(fwd - rev) * config.move_velocity);
 511         ctrl.Update(dt);
 512
 513         msg_timer.Update(dt);
 514         place_timer.Update(dt);
 515         remove_timer.Update(dt);
 516
 517         aim = ctrl.Aim();
 518         CheckAim();
 519
 520         if (msg_timer.HitOnce()) {
 521                 msg_timer.Stop();
 522         }
 523
 524         if (remove_timer.Hit()) {
 525                 RemoveBlock();
 526                 CheckAim();
 527         }
 528
 529         if (place_timer.Hit()) {
 530                 PlaceBlock();
 531                 CheckAim();
 532         }
 533
 534         if (debug) {
 535                 if (env.counter.Changed()) {
 536                         UpdateCounter();
 537                 }
 538                 UpdatePosition();
 539                 UpdateOrientation();
 540         }
 541 }
 542
 543 namespace {
 544
 545 OutlineModel::Buffer outl_buf;
 546
 547 }
 548
 549 void Interface::CheckAim() {
 550         float dist;
 551         if (world.Intersection(aim, glm::mat4(1.0f), aim_chunk, aim_block, dist, aim_normal)) {
 552                 outl_buf.Clear();
 553                 aim_chunk->Type(aim_chunk->BlockAt(aim_block)).FillOutlineModel(outl_buf);
 554                 outline.Update(outl_buf);
 555                 outline_transform = aim_chunk->Transform(world.Player().ChunkCoords());
 556                 outline_transform *= aim_chunk->ToTransform(Chunk::ToPos(aim_block), aim_block);
 557                 outline_transform *= glm::scale(glm::vec3(1.005f));
 558         } else {
 559                 aim_chunk = nullptr;
 560         }
 561 }
 562
 563
 564 void Interface::Render(Viewport &viewport) noexcept {
 565         if (config.visual_disabled) return;
 566
 567         if (aim_chunk) {
 568                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 569                 outline_prog.SetM(outline_transform);
 570                 outline.Draw();
 571         }
 572
 573         if (debug) {
 574                 counter_text.Render(viewport);
 575                 position_text.Render(viewport);
 576                 orientation_text.Render(viewport);
 577         }
 578
 579         if (msg_timer.Running()) {
 580                 messages.Render(viewport);
 581         }
 582
 583         hud.Render(viewport);
 584 }
 585
 586
 587 Keymap::Keymap()
 588 : codemap{ NONE } {
 589
 590 }
 591
 592 void Keymap::Map(SDL_Scancode scancode, Action action) {
 593         if (scancode > MAX_SCANCODE) {
 594                 throw std::runtime_error("refusing to map scancode: too damn high");
 595         }
 596         codemap[scancode] = action;
 597 }
 598
 599 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) {
 600         if (scancode < NUM_SCANCODES) {
 601                 return codemap[scancode];
 602         } else {
 603                 return NONE;
 604         }
 605 }
 606
 607
 608 void Keymap::LoadDefault() {
 609         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 610         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 611         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 612         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 613         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 614         Map(SDL_SCANCODE_A, MOVE_LEFT);
 615         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 616         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 617         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 618         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 619         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 620         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 621         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 622
 623         Map(SDL_SCANCODE_Q, BLOCK_FACE);
 624         Map(SDL_SCANCODE_E, BLOCK_TURN);
 625         Map(SDL_SCANCODE_TAB, BLOCK_NEXT);
 626         Map(SDL_SCANCODE_RIGHTBRACKET, BLOCK_NEXT);
 627         Map(SDL_SCANCODE_LEFTBRACKET, BLOCK_PREV);
 628
 629         Map(SDL_SCANCODE_INSERT, BLOCK_PLACE);
 630         Map(SDL_SCANCODE_RETURN, BLOCK_PLACE);
 631         Map(SDL_SCANCODE_MENU, BLOCK_PICK);
 632         Map(SDL_SCANCODE_DELETE, BLOCK_REMOVE);
 633         Map(SDL_SCANCODE_BACKSPACE, BLOCK_REMOVE);
 634
 635         Map(SDL_SCANCODE_N, TOGGLE_COLLISION);
 636         Map(SDL_SCANCODE_F1, TOGGLE_VISUAL);
 637         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 638         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 639
 640         Map(SDL_SCANCODE_B, PRINT_BLOCK);
 641         Map(SDL_SCANCODE_C, PRINT_CHUNK);
 642         Map(SDL_SCANCODE_L, PRINT_LIGHT);
 643         Map(SDL_SCANCODE_P, PRINT_SELECTION);
 644
 645         Map(SDL_SCANCODE_ESCAPE, EXIT);
 646 }
 647
 648
 649 void Keymap::Load(std::istream &is) {
 650         TokenStreamReader in(is);
 651         std::string key_name;
 652         std::string action_name;
 653         SDL_Scancode key;
 654         Action action;
 655         while (in.HasMore()) {
 656                 if (in.Peek().type == Token::STRING) {
 657                         in.ReadString(key_name);
 658                         key = SDL_GetScancodeFromName(key_name.c_str());
 659                 } else {
 660                         key = SDL_Scancode(in.GetInt());
 661                 }
 662                 in.Skip(Token::EQUALS);
 663                 in.ReadIdentifier(action_name);
 664                 action = StringToAction(action_name);
 665                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 666                         in.Skip(Token::SEMICOLON);
 667                 }
 668                 Map(key, action);
 669         }
 670 }
 671
 672 void Keymap::Save(std::ostream &out) {
 673         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 674                 if (codemap[i] == NONE) continue;
 675
 676                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 677                 if (str && *str) {
 678                         out << '"';
 679                         while (*str) {
 680                                 if (*str == '"') {
 681                                         out << "\\\"";
 682                                 } else {
 683                                         out << *str;
 684                                 }
 685                                 ++str;
 686                         }
 687                         out << '"';
 688                 } else {
 689                         out << i;
 690                 }
 691
 692                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 693         }
 694 }
 695
 696
 697 const char *Keymap::ActionToString(Action action) {
 698         switch (action) {
 699                 default:
 700                 case NONE:
 701                         return "none";
 702                 case MOVE_FORWARD:
 703                         return "move_forward";
 704                 case MOVE_BACKWARD:
 705                         return "move_backward";
 706                 case MOVE_LEFT:
 707                         return "move_left";
 708                 case MOVE_RIGHT:
 709                         return "move_right";
 710                 case MOVE_UP:
 711                         return "move_up";
 712                 case MOVE_DOWN:
 713                         return "move_down";
 714                 case BLOCK_FACE:
 715                         return "block_face";
 716                 case BLOCK_TURN:
 717                         return "block_turn";
 718                 case BLOCK_NEXT:
 719                         return "block_next";
 720                 case BLOCK_PREV:
 721                         return "block_prev";
 722                 case BLOCK_PLACE:
 723                         return "block_place";
 724                 case BLOCK_PICK:
 725                         return "block_pick";
 726                 case BLOCK_REMOVE:
 727                         return "block_remove";
 728                 case TOGGLE_COLLISION:
 729                         return "toggle_collision";
 730                 case TOGGLE_AUDIO:
 731                         return "toggle_audio";
 732                 case TOGGLE_VISUAL:
 733                         return "toggle_visual";
 734                 case TOGGLE_DEBUG:
 735                         return "toggle_debug";
 736                 case PRINT_BLOCK:
 737                         return "print_block";
 738                 case PRINT_CHUNK:
 739                         return "print_chunk";
 740                 case PRINT_LIGHT:
 741                         return "print_light";
 742                 case PRINT_SELECTION:
 743                         return "print_selection";
 744                 case EXIT:
 745                         return "exit";
 746         }
 747 }
 748
 749 Keymap::Action Keymap::StringToAction(const std::string &str) {
 750         if (str == "move_forward") {
 751                 return MOVE_FORWARD;
 752         } else if (str == "move_backward") {
 753                 return MOVE_BACKWARD;
 754         } else if (str == "move_left") {
 755                 return MOVE_LEFT;
 756         } else if (str == "move_right") {
 757                 return MOVE_RIGHT;
 758         } else if (str == "move_up") {
 759                 return MOVE_UP;
 760         } else if (str == "move_down") {
 761                 return MOVE_DOWN;
 762         } else if (str == "block_face") {
 763                 return BLOCK_FACE;
 764         } else if (str == "block_turn") {
 765                 return BLOCK_TURN;
 766         } else if (str == "block_next") {
 767                 return BLOCK_NEXT;
 768         } else if (str == "block_prev") {
 769                 return BLOCK_PREV;
 770         } else if (str == "block_place") {
 771                 return BLOCK_PLACE;
 772         } else if (str == "block_pick") {
 773                 return BLOCK_PICK;
 774         } else if (str == "block_remove") {
 775                 return BLOCK_REMOVE;
 776         } else if (str == "toggle_collision") {
 777                 return TOGGLE_COLLISION;
 778         } else if (str == "toggle_audio") {
 779                 return TOGGLE_AUDIO;
 780         } else if (str == "toggle_visual") {
 781                 return TOGGLE_VISUAL;
 782         } else if (str == "toggle_debug") {
 783                 return TOGGLE_DEBUG;
 784         } else if (str == "print_block") {
 785                 return PRINT_BLOCK;
 786         } else if (str == "print_chunk") {
 787                 return PRINT_CHUNK;
 788         } else if (str == "print_light") {
 789                 return PRINT_LIGHT;
 790         } else if (str == "print_selection") {
 791                 return PRINT_SELECTION;
 792         } else if (str == "exit") {
 793                 return EXIT;
 794         } else {
 795                 return NONE;
 796         }
 797 }
 798
 799 }