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::Display(const Block &b) {
  63         const BlockType &type = types.Get(b.type);
  64
  65         block_buf.Clear();
  66         type.FillEntityModel(block_buf, b.Transform());
  67         block.Update(block_buf);
  68
  69         block_label.Set(font, type.label);
  70
  71         block_visible = type.visible;
  72 }
  73
  74
  75 void HUD::Render(Viewport &viewport) noexcept {
  76         viewport.ClearDepth();
  77
  78         PlainColor &outline_prog = viewport.HUDOutlineProgram();
  79         viewport.EnableInvertBlending();
  80         viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
  81         outline_prog.SetM(viewport.Cursor());
  82         crosshair.Draw();
  83
  84         if (block_visible) {
  85                 DirectionalLighting &world_prog = viewport.HUDProgram();
  86                 world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
  87                 // disable distance fog
  88                 world_prog.SetFogDensity(0.0f);
  89
  90                 viewport.DisableBlending();
  91                 world_prog.SetM(block_transform);
  92                 block.Draw();
  93                 block_label.Render(viewport);
  94         }
  95 }
  96
  97
  98 Interface::Interface(
  99         const Config &config,
 100         Environment &env,
 101         World &world)
 102 : env(env)
 103 , world(world)
 104 , ctrl(world.Player())
 105 , hud(world.BlockTypes(), env.assets.small_ui_font)
 106 , aim{{ 0, 0, 0 }, { 0, 0, -1 }}
 107 , aim_world()
 108 , aim_entity()
 109 , outline()
 110 , outline_transform(1.0f)
 111 , counter_text()
 112 , position_text()
 113 , orientation_text()
 114 , block_text()
 115 , last_displayed()
 116 , messages(env.assets.small_ui_font)
 117 , msg_timer(5000)
 118 , config(config)
 119 , place_timer(256)
 120 , remove_timer(256)
 121 , remove(0)
 122 , selection(1)
 123 , place_sound(env.assets.LoadSound("thump"))
 124 , remove_sound(env.assets.LoadSound("plop"))
 125 , fwd(0)
 126 , rev(0)
 127 , debug(false) {
 128         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 129         counter_text.Foreground(glm::vec4(1.0f));
 130         counter_text.Background(glm::vec4(0.5f));
 131         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 132         position_text.Foreground(glm::vec4(1.0f));
 133         position_text.Background(glm::vec4(0.5f));
 134         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 135         orientation_text.Foreground(glm::vec4(1.0f));
 136         orientation_text.Background(glm::vec4(0.5f));
 137         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 138         block_text.Foreground(glm::vec4(1.0f));
 139         block_text.Background(glm::vec4(0.5f));
 140         block_text.Set(env.assets.small_ui_font, "Block: none");
 141         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 142         messages.Foreground(glm::vec4(1.0f));
 143         messages.Background(glm::vec4(0.5f));
 144         hud.Display(selection);
 145 }
 146
 147
 148 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 149         if (config.keyboard_disabled) return;
 150
 151         switch (env.keymap.Lookup(event)) {
 152                 case Keymap::MOVE_FORWARD:
 153                         rev.z = 1;
 154                         break;
 155                 case Keymap::MOVE_BACKWARD:
 156                         fwd.z = 1;
 157                         break;
 158                 case Keymap::MOVE_LEFT:
 159                         rev.x = 1;
 160                         break;
 161                 case Keymap::MOVE_RIGHT:
 162                         fwd.x = 1;
 163                         break;
 164                 case Keymap::MOVE_UP:
 165                         fwd.y = 1;
 166                         break;
 167                 case Keymap::MOVE_DOWN:
 168                         rev.y = 1;
 169                         break;
 170
 171                 case Keymap::BLOCK_FACE:
 172                         FaceBlock();
 173                         break;
 174                 case Keymap::BLOCK_TURN:
 175                         TurnBlock();
 176                         break;
 177                 case Keymap::BLOCK_NEXT:
 178                         SelectNext();
 179                         break;
 180                 case Keymap::BLOCK_PREV:
 181                         SelectPrevious();
 182                         break;
 183
 184                 case Keymap::BLOCK_PLACE:
 185                         PlaceBlock();
 186                         break;
 187                 case Keymap::BLOCK_PICK:
 188                         PickBlock();
 189                         break;
 190                 case Keymap::BLOCK_REMOVE:
 191                         RemoveBlock();
 192                         break;
 193
 194                 case Keymap::TOGGLE_COLLISION:
 195                         ToggleCollision();
 196                         break;
 197
 198                 case Keymap::PRINT_BLOCK:
 199                         PrintBlockInfo();
 200                         break;
 201                 case Keymap::PRINT_CHUNK:
 202                         PrintChunkInfo();
 203                         break;
 204                 case Keymap::PRINT_LIGHT:
 205                         PrintLightInfo();
 206                         break;
 207                 case Keymap::PRINT_SELECTION:
 208                         PrintSelectionInfo();
 209                         break;
 210
 211                 case Keymap::TOGGLE_VISUAL:
 212                         ToggleVisual();
 213                         break;
 214                 case Keymap::TOGGLE_DEBUG:
 215                         ToggleDebug();
 216                         break;
 217                 case Keymap::TOGGLE_AUDIO:
 218                         ToggleAudio();
 219                         break;
 220
 221                 case Keymap::EXIT:
 222                         env.state.Pop();
 223                         break;
 224
 225                 default:
 226                         break;
 227         }
 228 }
 229
 230 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 231         if (config.keyboard_disabled) return;
 232
 233         switch (env.keymap.Lookup(event)) {
 234                 case Keymap::MOVE_FORWARD:
 235                         rev.z = 0;
 236                         break;
 237                 case Keymap::MOVE_BACKWARD:
 238                         fwd.z = 0;
 239                         break;
 240                 case Keymap::MOVE_LEFT:
 241                         rev.x = 0;
 242                         break;
 243                 case Keymap::MOVE_RIGHT:
 244                         fwd.x = 0;
 245                         break;
 246                 case Keymap::MOVE_UP:
 247                         fwd.y = 0;
 248                         break;
 249                 case Keymap::MOVE_DOWN:
 250                         rev.y = 0;
 251                         break;
 252
 253                 default:
 254                         break;
 255         }
 256 }
 257
 258 void Interface::FaceBlock() {
 259         selection.SetFace(Block::Face((selection.GetFace() + 1) % Block::FACE_COUNT));
 260         hud.Display(selection);
 261 }
 262
 263 void Interface::TurnBlock() {
 264         selection.SetTurn(Block::Turn((selection.GetTurn() + 1) % Block::TURN_COUNT));
 265         hud.Display(selection);
 266 }
 267
 268 void Interface::ToggleCollision() {
 269         ctrl.Controlled().WorldCollidable(!ctrl.Controlled().WorldCollidable());
 270         if (ctrl.Controlled().WorldCollidable()) {
 271                 PostMessage("collision on");
 272         } else {
 273                 PostMessage("collision off");
 274         }
 275 }
 276
 277 void Interface::PrintBlockInfo() {
 278         std::cout << std::endl;
 279         if (!aim_world) {
 280                 PostMessage("not looking at any block");
 281                 Ray aim = ctrl.Aim();
 282                 std::stringstream s;
 283                 s << "aim ray: " << aim.orig << ", " << aim.dir;
 284                 PostMessage(s.str());
 285                 return;
 286         }
 287         std::stringstream s;
 288         s << "looking at block " << aim_world.block
 289                 << " " << aim_world.BlockCoords()
 290                 << " of chunk " << aim_world.GetChunk().Position()
 291         ;
 292         PostMessage(s.str());
 293         Print(aim_world.GetBlock());
 294 }
 295
 296 void Interface::PrintChunkInfo() {
 297         std::cout << std::endl;
 298         if (!aim_world) {
 299                 PostMessage("not looking at any block");
 300                 return;
 301         }
 302         std::stringstream s;
 303         s << "looking at chunk " << aim_world.GetChunk().Position();
 304         PostMessage(s.str());
 305
 306         PostMessage("  neighbors:");
 307         if (aim_world.GetChunk().HasNeighbor(Block::FACE_LEFT)) {
 308                 s.str("");
 309                 s << " left  " << aim_world.GetChunk().GetNeighbor(Block::FACE_LEFT).Position();
 310                 PostMessage(s.str());
 311         }
 312         if (aim_world.GetChunk().HasNeighbor(Block::FACE_RIGHT)) {
 313                 s.str("");
 314                 s << " right " << aim_world.GetChunk().GetNeighbor(Block::FACE_RIGHT).Position();
 315                 PostMessage(s.str());
 316         }
 317         if (aim_world.GetChunk().HasNeighbor(Block::FACE_UP)) {
 318                 s.str("");
 319                 s << " up    " << aim_world.GetChunk().GetNeighbor(Block::FACE_UP).Position();
 320                 PostMessage(s.str());
 321         }
 322         if (aim_world.GetChunk().HasNeighbor(Block::FACE_DOWN)) {
 323                 s.str("");
 324                 s << " down  " << aim_world.GetChunk().GetNeighbor(Block::FACE_DOWN).Position();
 325                 PostMessage(s.str());
 326         }
 327         if (aim_world.GetChunk().HasNeighbor(Block::FACE_FRONT)) {
 328                 s.str("");
 329                 s << " front " << aim_world.GetChunk().GetNeighbor(Block::FACE_FRONT).Position();
 330                 PostMessage(s.str());
 331         }
 332         if (aim_world.GetChunk().HasNeighbor(Block::FACE_BACK)) {
 333                 s.str("");
 334                 s << " back  " << aim_world.GetChunk().GetNeighbor(Block::FACE_BACK).Position();
 335                 PostMessage(s.str());
 336         }
 337         std::cout << std::endl;
 338 }
 339
 340 void Interface::PrintLightInfo() {
 341         std::stringstream s;
 342         s
 343                 << "light level " << world.PlayerChunk().GetLight(world.Player().Position())
 344                 << " at position " << world.Player().Position()
 345         ;
 346         PostMessage(s.str());
 347 }
 348
 349 void Interface::PrintSelectionInfo() {
 350         std::cout << std::endl;
 351         Print(selection);
 352 }
 353
 354 void Interface::Print(const Block &block) {
 355         std::stringstream s;
 356         s << "type: " << block.type
 357                 << ", face: " << block.GetFace()
 358                 << ", turn: " << block.GetTurn()
 359         ;
 360         PostMessage(s.str());
 361 }
 362
 363 void Interface::ToggleAudio() {
 364         config.audio_disabled = !config.audio_disabled;
 365         if (config.audio_disabled) {
 366                 PostMessage("audio off");
 367         } else {
 368                 PostMessage("audio on");
 369         }
 370 }
 371
 372 void Interface::ToggleVisual() {
 373         config.visual_disabled = !config.visual_disabled;
 374         if (config.visual_disabled) {
 375                 PostMessage("visual off");
 376         } else {
 377                 PostMessage("visual on");
 378         }
 379 }
 380
 381 void Interface::ToggleDebug() {
 382         debug = !debug;
 383         if (debug) {
 384                 UpdateCounter();
 385                 UpdatePosition();
 386                 UpdateOrientation();
 387                 UpdateBlockInfo();
 388         }
 389 }
 390
 391 void Interface::UpdateCounter() {
 392         std::stringstream s;
 393         s << std::setprecision(3) <<
 394                 "avg: " << env.counter.Average().running << "ms, "
 395                 "peak: " << env.counter.Peak().running << "ms";
 396         std::string text = s.str();
 397         counter_text.Set(env.assets.small_ui_font, text);
 398 }
 399
 400 void Interface::UpdatePosition() {
 401         std::stringstream s;
 402         s << std::setprecision(3) << "pos: " << ctrl.Controlled().AbsolutePosition();
 403         position_text.Set(env.assets.small_ui_font, s.str());
 404 }
 405
 406 void Interface::UpdateOrientation() {
 407         std::stringstream s;
 408         s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 409                 << ", yaw: " << rad2deg(ctrl.Yaw());
 410         orientation_text.Set(env.assets.small_ui_font, s.str());
 411 }
 412
 413 void Interface::UpdateBlockInfo() {
 414         if (aim_world) {
 415                 const Block &block = aim_world.GetBlock();
 416                 if (last_displayed != block) {
 417                         std::stringstream s;
 418                         s << "Block: "
 419                                 << aim_world.GetType().label
 420                                 << ", face: " << block.GetFace()
 421                                 << ", turn: " << block.GetTurn();
 422                         block_text.Set(env.assets.small_ui_font, s.str());
 423                         last_displayed = block;
 424                 }
 425         } else {
 426                 if (last_displayed != Block()) {
 427                         std::stringstream s;
 428                         s << "Block: none";
 429                         block_text.Set(env.assets.small_ui_font, s.str());
 430                         last_displayed = Block();
 431                 }
 432         }
 433 }
 434
 435
 436 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 437         if (config.mouse_disabled) return;
 438         ctrl.RotateYaw(event.xrel * config.yaw_sensitivity);
 439         ctrl.RotatePitch(event.yrel * config.pitch_sensitivity);
 440 }
 441
 442 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 443         if (config.mouse_disabled) return;
 444
 445         if (event.button == SDL_BUTTON_LEFT) {
 446                 RemoveBlock();
 447                 remove_timer.Start();
 448         } else if (event.button == SDL_BUTTON_MIDDLE) {
 449                 PickBlock();
 450         } else if (event.button == SDL_BUTTON_RIGHT) {
 451                 PlaceBlock();
 452                 place_timer.Start();
 453         }
 454 }
 455
 456 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 457         if (config.mouse_disabled) return;
 458
 459         if (event.button == SDL_BUTTON_LEFT) {
 460                 remove_timer.Stop();
 461         } else if (event.button == SDL_BUTTON_RIGHT) {
 462                 place_timer.Stop();
 463         }
 464 }
 465
 466 void Interface::PickBlock() {
 467         if (!aim_world) return;
 468         selection = aim_world.GetBlock();
 469         hud.Display(selection);
 470 }
 471
 472 void Interface::PlaceBlock() {
 473         if (!aim_world) return;
 474
 475         glm::vec3 next_pos = aim_world.BlockCoords() + aim_world.normal;
 476         BlockLookup next_block(&aim_world.GetChunk(), next_pos);
 477         if (next_block) {
 478         }
 479         next_block.SetBlock(selection);
 480
 481         if (config.audio_disabled) return;
 482         const Entity &player = ctrl.Controlled();
 483         env.audio.Play(
 484                 place_sound,
 485                 aim_world.GetChunk().ToSceneCoords(player.ChunkCoords(), next_pos)
 486         );
 487 }
 488
 489 void Interface::RemoveBlock() noexcept {
 490         if (!aim_world) return;
 491         aim_world.SetBlock(remove);
 492
 493         if (config.audio_disabled) return;
 494         const Entity &player = ctrl.Controlled();
 495         env.audio.Play(
 496                 remove_sound,
 497                 aim_world.GetChunk().ToSceneCoords(player.ChunkCoords(), aim_world.BlockCoords())
 498         );
 499 }
 500
 501
 502 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 503         if (config.mouse_disabled) return;
 504
 505         if (event.y < 0) {
 506                 SelectNext();
 507         } else if (event.y > 0) {
 508                 SelectPrevious();
 509         }
 510 }
 511
 512 void Interface::SelectNext() {
 513         ++selection.type;
 514         if (size_t(selection.type) >= world.BlockTypes().Size()) {
 515                 selection.type = 1;
 516         }
 517         hud.Display(selection);
 518 }
 519
 520 void Interface::SelectPrevious() {
 521         --selection.type;
 522         if (selection.type <= 0) {
 523                 selection.type = world.BlockTypes().Size() - 1;
 524         }
 525         hud.Display(selection);
 526 }
 527
 528
 529 void Interface::PostMessage(const char *msg) {
 530         messages.PushLine(msg);
 531         msg_timer.Reset();
 532         msg_timer.Start();
 533         std::cout << msg << std::endl;
 534 }
 535
 536
 537 void Interface::Update(int dt) {
 538         ctrl.Velocity(glm::vec3(fwd - rev) * config.move_velocity);
 539         ctrl.Update(dt);
 540
 541         msg_timer.Update(dt);
 542         place_timer.Update(dt);
 543         remove_timer.Update(dt);
 544
 545         aim = ctrl.Aim();
 546         CheckAim();
 547
 548         if (msg_timer.HitOnce()) {
 549                 msg_timer.Stop();
 550         }
 551
 552         if (remove_timer.Hit()) {
 553                 RemoveBlock();
 554                 CheckAim();
 555         }
 556
 557         if (place_timer.Hit()) {
 558                 PlaceBlock();
 559                 CheckAim();
 560         }
 561
 562         if (debug) {
 563                 if (env.counter.Changed()) {
 564                         UpdateCounter();
 565                 }
 566                 UpdatePosition();
 567                 UpdateOrientation();
 568         }
 569 }
 570
 571 namespace {
 572
 573 OutlineModel::Buffer outl_buf;
 574
 575 }
 576
 577 void Interface::CheckAim() {
 578         if (!world.Intersection(aim, glm::mat4(1.0f), aim_world)) {
 579                 aim_world = WorldCollision();
 580         }
 581         if (!world.Intersection(aim, glm::mat4(1.0f), aim_entity)) {
 582                 aim_entity = EntityCollision();
 583         }
 584         if (aim_world && aim_entity) {
 585                 // got both, pick the closest one
 586                 if (aim_world.depth < aim_entity.depth) {
 587                         UpdateOutline();
 588                         aim_entity = EntityCollision();
 589                 } else {
 590                         aim_world = WorldCollision();
 591                 }
 592         } else if (aim_world) {
 593                 UpdateOutline();
 594         }
 595         if (debug) {
 596                 UpdateBlockInfo();
 597         }
 598 }
 599
 600 void Interface::UpdateOutline() {
 601         outl_buf.Clear();
 602         aim_world.GetType().FillOutlineModel(outl_buf);
 603         outline.Update(outl_buf);
 604         outline_transform = aim_world.GetChunk().Transform(world.Player().ChunkCoords());
 605         outline_transform *= aim_world.BlockTransform();
 606         outline_transform *= glm::scale(glm::vec3(1.005f));
 607 }
 608
 609
 610 void Interface::Render(Viewport &viewport) noexcept {
 611         if (config.visual_disabled) return;
 612
 613         if (aim_world) {
 614                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 615                 outline_prog.SetM(outline_transform);
 616                 outline.Draw();
 617         }
 618
 619         if (debug) {
 620                 counter_text.Render(viewport);
 621                 position_text.Render(viewport);
 622                 orientation_text.Render(viewport);
 623                 block_text.Render(viewport);
 624         }
 625
 626         if (msg_timer.Running()) {
 627                 messages.Render(viewport);
 628         }
 629
 630         hud.Render(viewport);
 631 }
 632
 633
 634 Keymap::Keymap()
 635 : codemap{ NONE } {
 636
 637 }
 638
 639 void Keymap::Map(SDL_Scancode scancode, Action action) {
 640         if (scancode > MAX_SCANCODE) {
 641                 throw std::runtime_error("refusing to map scancode: too damn high");
 642         }
 643         codemap[scancode] = action;
 644 }
 645
 646 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) {
 647         if (scancode < NUM_SCANCODES) {
 648                 return codemap[scancode];
 649         } else {
 650                 return NONE;
 651         }
 652 }
 653
 654
 655 void Keymap::LoadDefault() {
 656         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 657         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 658         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 659         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 660         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 661         Map(SDL_SCANCODE_A, MOVE_LEFT);
 662         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 663         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 664         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 665         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 666         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 667         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 668         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 669
 670         Map(SDL_SCANCODE_Q, BLOCK_FACE);
 671         Map(SDL_SCANCODE_E, BLOCK_TURN);
 672         Map(SDL_SCANCODE_TAB, BLOCK_NEXT);
 673         Map(SDL_SCANCODE_RIGHTBRACKET, BLOCK_NEXT);
 674         Map(SDL_SCANCODE_LEFTBRACKET, BLOCK_PREV);
 675
 676         Map(SDL_SCANCODE_INSERT, BLOCK_PLACE);
 677         Map(SDL_SCANCODE_RETURN, BLOCK_PLACE);
 678         Map(SDL_SCANCODE_MENU, BLOCK_PICK);
 679         Map(SDL_SCANCODE_DELETE, BLOCK_REMOVE);
 680         Map(SDL_SCANCODE_BACKSPACE, BLOCK_REMOVE);
 681
 682         Map(SDL_SCANCODE_N, TOGGLE_COLLISION);
 683         Map(SDL_SCANCODE_F1, TOGGLE_VISUAL);
 684         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 685         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 686
 687         Map(SDL_SCANCODE_B, PRINT_BLOCK);
 688         Map(SDL_SCANCODE_C, PRINT_CHUNK);
 689         Map(SDL_SCANCODE_L, PRINT_LIGHT);
 690         Map(SDL_SCANCODE_P, PRINT_SELECTION);
 691
 692         Map(SDL_SCANCODE_ESCAPE, EXIT);
 693 }
 694
 695
 696 void Keymap::Load(std::istream &is) {
 697         TokenStreamReader in(is);
 698         std::string key_name;
 699         std::string action_name;
 700         SDL_Scancode key;
 701         Action action;
 702         while (in.HasMore()) {
 703                 if (in.Peek().type == Token::STRING) {
 704                         in.ReadString(key_name);
 705                         key = SDL_GetScancodeFromName(key_name.c_str());
 706                 } else {
 707                         key = SDL_Scancode(in.GetInt());
 708                 }
 709                 in.Skip(Token::EQUALS);
 710                 in.ReadIdentifier(action_name);
 711                 action = StringToAction(action_name);
 712                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 713                         in.Skip(Token::SEMICOLON);
 714                 }
 715                 Map(key, action);
 716         }
 717 }
 718
 719 void Keymap::Save(std::ostream &out) {
 720         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 721                 if (codemap[i] == NONE) continue;
 722
 723                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 724                 if (str && *str) {
 725                         out << '"';
 726                         while (*str) {
 727                                 if (*str == '"') {
 728                                         out << "\\\"";
 729                                 } else {
 730                                         out << *str;
 731                                 }
 732                                 ++str;
 733                         }
 734                         out << '"';
 735                 } else {
 736                         out << i;
 737                 }
 738
 739                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 740         }
 741 }
 742
 743
 744 const char *Keymap::ActionToString(Action action) {
 745         switch (action) {
 746                 default:
 747                 case NONE:
 748                         return "none";
 749                 case MOVE_FORWARD:
 750                         return "move_forward";
 751                 case MOVE_BACKWARD:
 752                         return "move_backward";
 753                 case MOVE_LEFT:
 754                         return "move_left";
 755                 case MOVE_RIGHT:
 756                         return "move_right";
 757                 case MOVE_UP:
 758                         return "move_up";
 759                 case MOVE_DOWN:
 760                         return "move_down";
 761                 case BLOCK_FACE:
 762                         return "block_face";
 763                 case BLOCK_TURN:
 764                         return "block_turn";
 765                 case BLOCK_NEXT:
 766                         return "block_next";
 767                 case BLOCK_PREV:
 768                         return "block_prev";
 769                 case BLOCK_PLACE:
 770                         return "block_place";
 771                 case BLOCK_PICK:
 772                         return "block_pick";
 773                 case BLOCK_REMOVE:
 774                         return "block_remove";
 775                 case TOGGLE_COLLISION:
 776                         return "toggle_collision";
 777                 case TOGGLE_AUDIO:
 778                         return "toggle_audio";
 779                 case TOGGLE_VISUAL:
 780                         return "toggle_visual";
 781                 case TOGGLE_DEBUG:
 782                         return "toggle_debug";
 783                 case PRINT_BLOCK:
 784                         return "print_block";
 785                 case PRINT_CHUNK:
 786                         return "print_chunk";
 787                 case PRINT_LIGHT:
 788                         return "print_light";
 789                 case PRINT_SELECTION:
 790                         return "print_selection";
 791                 case EXIT:
 792                         return "exit";
 793         }
 794 }
 795
 796 Keymap::Action Keymap::StringToAction(const std::string &str) {
 797         if (str == "move_forward") {
 798                 return MOVE_FORWARD;
 799         } else if (str == "move_backward") {
 800                 return MOVE_BACKWARD;
 801         } else if (str == "move_left") {
 802                 return MOVE_LEFT;
 803         } else if (str == "move_right") {
 804                 return MOVE_RIGHT;
 805         } else if (str == "move_up") {
 806                 return MOVE_UP;
 807         } else if (str == "move_down") {
 808                 return MOVE_DOWN;
 809         } else if (str == "block_face") {
 810                 return BLOCK_FACE;
 811         } else if (str == "block_turn") {
 812                 return BLOCK_TURN;
 813         } else if (str == "block_next") {
 814                 return BLOCK_NEXT;
 815         } else if (str == "block_prev") {
 816                 return BLOCK_PREV;
 817         } else if (str == "block_place") {
 818                 return BLOCK_PLACE;
 819         } else if (str == "block_pick") {
 820                 return BLOCK_PICK;
 821         } else if (str == "block_remove") {
 822                 return BLOCK_REMOVE;
 823         } else if (str == "toggle_collision") {
 824                 return TOGGLE_COLLISION;
 825         } else if (str == "toggle_audio") {
 826                 return TOGGLE_AUDIO;
 827         } else if (str == "toggle_visual") {
 828                 return TOGGLE_VISUAL;
 829         } else if (str == "toggle_debug") {
 830                 return TOGGLE_DEBUG;
 831         } else if (str == "print_block") {
 832                 return PRINT_BLOCK;
 833         } else if (str == "print_chunk") {
 834                 return PRINT_CHUNK;
 835         } else if (str == "print_light") {
 836                 return PRINT_LIGHT;
 837         } else if (str == "print_selection") {
 838                 return PRINT_SELECTION;
 839         } else if (str == "exit") {
 840                 return EXIT;
 841         } else {
 842                 return NONE;
 843         }
 844 }
 845
 846 }