src/ui/ui.cpp

   1 #include "ClientController.hpp"
   2 #include "DirectInput.hpp"
   3 #include "HUD.hpp"
   4 #include "InteractiveManipulator.hpp"
   5 #include "Interface.hpp"
   6 #include "Keymap.hpp"
   7 #include "PlayerController.hpp"
   8
   9 #include "../app/Assets.hpp"
  10 #include "../app/Config.hpp"
  11 #include "../app/Environment.hpp"
  12 #include "../app/FrameCounter.hpp"
  13 #include "../app/init.hpp"
  14 #include "../audio/Audio.hpp"
  15 #include "../audio/SoundBank.hpp"
  16 #include "../graphics/Font.hpp"
  17 #include "../graphics/Viewport.hpp"
  18 #include "../io/TokenStreamReader.hpp"
  19 #include "../model/bounds.hpp"
  20 #include "../world/BlockLookup.hpp"
  21 #include "../world/World.hpp"
  22 #include "../world/WorldManipulator.hpp"
  23
  24 #include <algorithm>
  25 #include <cmath>
  26 #include <iostream>
  27 #include <map>
  28 #include <sstream>
  29 #include <glm/gtc/matrix_transform.hpp>
  30 #include <glm/gtx/rotate_vector.hpp>
  31 #include <glm/gtx/io.hpp>
  32
  33
  34 namespace blank {
  35
  36 PlayerController::PlayerController(World &world, Player &player)
  37 : world(world)
  38 , player(player)
  39 , move_dir(0.0f)
  40 , pitch(0.0f)
  41 , yaw(0.0f)
  42 , dirty(true)
  43 , aim_world()
  44 , aim_entity() {
  45
  46 }
  47
  48 void PlayerController::SetMovement(const glm::vec3 &m) noexcept {
  49         if (dot(m, m) > 1.0f) {
  50                 move_dir = normalize(m);
  51         } else {
  52                 move_dir = m;
  53         }
  54         Invalidate();
  55 }
  56
  57 void PlayerController::TurnHead(float dp, float dy) noexcept {
  58         pitch += dp;
  59         if (pitch > PI / 2) {
  60                 pitch = PI / 2;
  61         } else if (pitch < -PI / 2) {
  62                 pitch = -PI / 2;
  63         }
  64         yaw += dy;
  65         if (yaw > PI) {
  66                 yaw -= PI * 2;
  67         } else if (yaw < -PI) {
  68                 yaw += PI * 2;
  69         }
  70         Invalidate();
  71 }
  72
  73 void PlayerController::SelectInventory(int i) noexcept {
  74         player.SetInventorySlot(i);
  75 }
  76
  77 int PlayerController::InventorySlot() const noexcept {
  78         return player.GetInventorySlot();
  79 }
  80
  81 void PlayerController::Invalidate() noexcept {
  82         dirty = true;
  83 }
  84
  85 void PlayerController::UpdatePlayer() noexcept {
  86         constexpr float max_vel = 5.0f; // in m/s
  87         if (dirty) {
  88                 player.GetEntity().Orientation(glm::quat(glm::vec3(0.0f, yaw, 0.0f)));
  89                 player.GetEntity().GetModel().EyesState().orientation = glm::quat(glm::vec3(pitch, 0.0f, 0.0f));
  90                 player.GetEntity().TargetVelocity(glm::rotateY(move_dir * max_vel, yaw));
  91
  92                 Ray aim = player.Aim();
  93                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
  94                         aim_world = WorldCollision();
  95                 }
  96                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
  97                         aim_entity = EntityCollision();
  98                 }
  99                 if (aim_world && aim_entity) {
 100                         // got both, pick the closest one
 101                         if (aim_world.depth < aim_entity.depth) {
 102                                 aim_entity = EntityCollision();
 103                         } else {
 104                                 aim_world = WorldCollision();
 105                         }
 106                 }
 107                 dirty = false;
 108         }
 109 }
 110
 111
 112 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
 113 : PlayerController(world, player)
 114 , manip(manip)
 115 , place_timer(256)
 116 , remove_timer(256) {
 117
 118 }
 119
 120 void DirectInput::Update(int dt) {
 121         Invalidate(); // world has changed in the meantime
 122         UpdatePlayer();
 123
 124         remove_timer.Update(dt);
 125         if (remove_timer.Hit()) {
 126                 RemoveBlock();
 127         }
 128
 129         place_timer.Update(dt);
 130         if (place_timer.Hit()) {
 131                 PlaceBlock();
 132         }
 133 }
 134
 135 void DirectInput::StartPrimaryAction() {
 136         if (!remove_timer.Running()) {
 137                 RemoveBlock();
 138                 remove_timer.Start();
 139         }
 140 }
 141
 142 void DirectInput::StopPrimaryAction() {
 143         remove_timer.Stop();
 144 }
 145
 146 void DirectInput::StartSecondaryAction() {
 147         if (!place_timer.Running()) {
 148                 PlaceBlock();
 149                 place_timer.Start();
 150         }
 151 }
 152
 153 void DirectInput::StopSecondaryAction() {
 154         place_timer.Stop();
 155 }
 156
 157 void DirectInput::StartTertiaryAction() {
 158         PickBlock();
 159 }
 160
 161 void DirectInput::StopTertiaryAction() {
 162         // nothing
 163 }
 164
 165 void DirectInput::PickBlock() {
 166         UpdatePlayer();
 167         if (!BlockFocus()) return;
 168         SelectInventory(BlockFocus().GetBlock().type - 1);
 169 }
 170
 171 void DirectInput::PlaceBlock() {
 172         UpdatePlayer();
 173         if (!BlockFocus()) return;
 174
 175         BlockLookup next_block(BlockFocus().chunk, BlockFocus().BlockPos(), Block::NormalFace(BlockFocus().normal));
 176         if (!next_block) {
 177                 return;
 178         }
 179         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(InventorySlot() + 1));
 180         Invalidate();
 181 }
 182
 183 void DirectInput::RemoveBlock() {
 184         UpdatePlayer();
 185         if (!BlockFocus()) return;
 186         manip.SetBlock(BlockFocus().GetChunk(), BlockFocus().block, Block(0));
 187         Invalidate();
 188 }
 189
 190
 191 HUD::HUD(Environment &env, Config &config, const Player &player)
 192 : env(env)
 193 , config(config)
 194 , player(player)
 195 // block focus
 196 , outline()
 197 , outline_transform(1.0f)
 198 , outline_visible(false)
 199 // "inventory"
 200 , block()
 201 , block_buf()
 202 , block_transform(1.0f)
 203 , block_label()
 204 , block_visible(false)
 205 // debug overlay
 206 , counter_text()
 207 , position_text()
 208 , orientation_text()
 209 , block_text()
 210 , show_block(false)
 211 , show_entity(false)
 212 // message box
 213 , messages(env.assets.small_ui_font)
 214 , msg_timer(5000)
 215 // crosshair
 216 , crosshair() {
 217         // "inventory"
 218         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 219         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 220         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 221         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 222         block_label.Position(
 223                 glm::vec3(50.0f, 85.0f, 0.0f),
 224                 Gravity::NORTH_WEST,
 225                 Gravity::NORTH
 226         );
 227         block_label.Foreground(glm::vec4(1.0f));
 228         block_label.Background(glm::vec4(0.5f));
 229
 230         // debug overlay
 231         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 232         counter_text.Foreground(glm::vec4(1.0f));
 233         counter_text.Background(glm::vec4(0.5f));
 234         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 235         position_text.Foreground(glm::vec4(1.0f));
 236         position_text.Background(glm::vec4(0.5f));
 237         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 238         orientation_text.Foreground(glm::vec4(1.0f));
 239         orientation_text.Background(glm::vec4(0.5f));
 240         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 241         block_text.Foreground(glm::vec4(1.0f));
 242         block_text.Background(glm::vec4(0.5f));
 243         block_text.Set(env.assets.small_ui_font, "Block: none");
 244         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 245         entity_text.Foreground(glm::vec4(1.0f));
 246         entity_text.Background(glm::vec4(0.5f));
 247         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 248
 249         // message box
 250         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 251         messages.Foreground(glm::vec4(1.0f));
 252         messages.Background(glm::vec4(0.5f));
 253
 254         // crosshair
 255         PrimitiveMesh::Buffer buf;
 256         buf.vertices = std::vector<glm::vec3>({
 257                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 258                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 259         });
 260         buf.indices = std::vector<PrimitiveMesh::Index>({
 261                 0, 1, 2, 3
 262         });
 263         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f, 1.0f });
 264         crosshair.Update(buf);
 265 }
 266
 267 namespace {
 268
 269 PrimitiveMesh::Buffer outl_buf;
 270
 271 }
 272
 273 void HUD::FocusBlock(const Chunk &chunk, int index) {
 274         const Block &block = chunk.BlockAt(index);
 275         const BlockType &type = chunk.Type(index);
 276         outl_buf.Clear();
 277         type.OutlinePrimitiveMesh(outl_buf);
 278         outline.Update(outl_buf);
 279         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 280         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 281         outline_transform *= glm::scale(glm::vec3(1.005f));
 282         outline_visible = true;
 283         {
 284                 std::stringstream s;
 285                 s << "Block: "
 286                         << type.label
 287                         << ", face: " << block.GetFace()
 288                         << ", turn: " << block.GetTurn();
 289                 block_text.Set(env.assets.small_ui_font, s.str());
 290         }
 291         show_block = true;
 292         show_entity = false;
 293 }
 294
 295 void HUD::FocusEntity(const Entity &entity) {
 296         {
 297                 std::stringstream s;
 298                 s << "Entity: " << entity.Name();
 299                 entity_text.Set(env.assets.small_ui_font, s.str());
 300         }
 301         show_block = false;
 302         show_entity = true;
 303 }
 304
 305 void HUD::FocusNone() {
 306         outline_visible = false;
 307         show_block = false;
 308         show_entity = false;
 309 }
 310
 311 void HUD::DisplayNone() {
 312         block_visible = false;
 313 }
 314
 315 void HUD::Display(const BlockType &type) {
 316         block_buf.Clear();
 317         type.FillEntityMesh(block_buf);
 318         block.Update(block_buf);
 319
 320         block_label.Set(env.assets.small_ui_font, type.label);
 321
 322         block_visible = type.visible;
 323 }
 324
 325
 326 void HUD::UpdateDebug() {
 327         UpdateCounter();
 328         UpdatePosition();
 329         UpdateOrientation();
 330 }
 331
 332 void HUD::UpdateCounter() {
 333         std::stringstream s;
 334         s << std::setprecision(3) <<
 335                 "avg: " << env.counter.Average().running << "ms, "
 336                 "peak: " << env.counter.Peak().running << "ms";
 337         std::string text = s.str();
 338         counter_text.Set(env.assets.small_ui_font, text);
 339 }
 340
 341 void HUD::UpdatePosition() {
 342         std::stringstream s;
 343         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 344         position_text.Set(env.assets.small_ui_font, s.str());
 345 }
 346
 347 void HUD::UpdateOrientation() {
 348         //std::stringstream s;
 349         //s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 350         //      << ", yaw: " << rad2deg(ctrl.Yaw());
 351         //orientation_text.Set(env.assets.small_ui_font, s.str());
 352 }
 353
 354 void HUD::PostMessage(const char *msg) {
 355         messages.PushLine(msg);
 356         msg_timer.Reset();
 357         msg_timer.Start();
 358         std::cout << msg << std::endl;
 359 }
 360
 361
 362 void HUD::Update(int dt) {
 363         msg_timer.Update(dt);
 364         if (msg_timer.HitOnce()) {
 365                 msg_timer.Stop();
 366         }
 367
 368         if (config.video.debug) {
 369                 if (env.counter.Changed()) {
 370                         UpdateCounter();
 371                 }
 372                 UpdatePosition();
 373                 UpdateOrientation();
 374         }
 375 }
 376
 377 void HUD::Render(Viewport &viewport) noexcept {
 378         // block focus
 379         if (outline_visible && config.video.world) {
 380                 PlainColor &outline_prog = viewport.WorldColorProgram();
 381                 outline_prog.SetM(outline_transform);
 382                 outline.DrawLines();
 383         }
 384
 385         // clear depth buffer so everything renders above the world
 386         viewport.ClearDepth();
 387
 388         if (config.video.hud) {
 389                 // "inventory"
 390                 if (block_visible) {
 391                         DirectionalLighting &world_prog = viewport.HUDProgram();
 392                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 393                         // disable distance fog
 394                         world_prog.SetFogDensity(0.0f);
 395
 396                         viewport.DisableBlending();
 397                         world_prog.SetM(block_transform);
 398                         block.Draw();
 399                         block_label.Render(viewport);
 400                 }
 401
 402                 // message box
 403                 if (msg_timer.Running()) {
 404                         messages.Render(viewport);
 405                 }
 406
 407                 // crosshair
 408                 PlainColor &outline_prog = viewport.HUDColorProgram();
 409                 viewport.EnableInvertBlending();
 410                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 411                 outline_prog.SetM(viewport.Cursor());
 412                 crosshair.DrawLines();
 413         }
 414
 415         // debug overlay
 416         if (config.video.debug) {
 417                 counter_text.Render(viewport);
 418                 position_text.Render(viewport);
 419                 orientation_text.Render(viewport);
 420                 if (show_block) {
 421                         block_text.Render(viewport);
 422                 } else if (show_entity) {
 423                         entity_text.Render(viewport);
 424                 }
 425         }
 426 }
 427
 428
 429 InteractiveManipulator::InteractiveManipulator(Audio &audio, const SoundBank &sounds, Entity &player)
 430 : player(player)
 431 , audio(audio)
 432 , sounds(sounds) {
 433
 434 }
 435
 436 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 437         const BlockType &old_type = chunk.Type(index);
 438         chunk.SetBlock(index, block);
 439         const BlockType &new_type = chunk.Type(index);
 440         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 441         if (new_type.id == 0) {
 442                 if (old_type.remove_sound >= 0) {
 443                         audio.Play(sounds[old_type.remove_sound], coords);
 444                 }
 445         } else {
 446                 if (new_type.place_sound >= 0) {
 447                         audio.Play(sounds[new_type.place_sound], coords);
 448                 }
 449         }
 450 }
 451
 452
 453 Interface::Interface(
 454         Config &config,
 455         const Keymap &keymap,
 456         PlayerController &pc,
 457         ClientController &cc)
 458 : config(config)
 459 , keymap(keymap)
 460 , player_ctrl(pc)
 461 , client_ctrl(cc)
 462 , fwd(0)
 463 , rev(0)
 464 , slot(0)
 465 , num_slots(10) {
 466
 467 }
 468
 469
 470 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 471         if (!config.input.keyboard) return;
 472
 473         Keymap::Action action = keymap.Lookup(event);
 474         switch (action) {
 475                 case Keymap::MOVE_FORWARD:
 476                         rev.z = 1;
 477                         UpdateMovement();
 478                         break;
 479                 case Keymap::MOVE_BACKWARD:
 480                         fwd.z = 1;
 481                         UpdateMovement();
 482                         break;
 483                 case Keymap::MOVE_LEFT:
 484                         rev.x = 1;
 485                         UpdateMovement();
 486                         break;
 487                 case Keymap::MOVE_RIGHT:
 488                         fwd.x = 1;
 489                         UpdateMovement();
 490                         break;
 491                 case Keymap::MOVE_UP:
 492                         fwd.y = 1;
 493                         UpdateMovement();
 494                         break;
 495                 case Keymap::MOVE_DOWN:
 496                         rev.y = 1;
 497                         UpdateMovement();
 498                         break;
 499
 500                 case Keymap::PRIMARY:
 501                         player_ctrl.StartPrimaryAction();
 502                         break;
 503                 case Keymap::SECONDARY:
 504                         player_ctrl.StartSecondaryAction();
 505                         break;
 506                 case Keymap::TERTIARY:
 507                         player_ctrl.StartTertiaryAction();
 508                         break;
 509
 510                 case Keymap::INV_NEXT:
 511                         InvRel(1);
 512                         break;
 513                 case Keymap::INV_PREVIOUS:
 514                         InvRel(-1);
 515                         break;
 516                 case Keymap::INV_1:
 517                 case Keymap::INV_2:
 518                 case Keymap::INV_3:
 519                 case Keymap::INV_4:
 520                 case Keymap::INV_5:
 521                 case Keymap::INV_6:
 522                 case Keymap::INV_7:
 523                 case Keymap::INV_8:
 524                 case Keymap::INV_9:
 525                 case Keymap::INV_10:
 526                         InvAbs(action - Keymap::INV_1);
 527                         break;
 528
 529                 case Keymap::EXIT:
 530                         client_ctrl.Exit();
 531                         break;
 532
 533                 case Keymap::TOGGLE_AUDIO:
 534                         config.audio.enabled = !config.audio.enabled;
 535                         client_ctrl.SetAudio(config.audio.enabled);
 536                         break;
 537                 case Keymap::TOGGLE_VIDEO:
 538                         config.video.world = !config.video.world;
 539                         client_ctrl.SetVideo(config.video.world);
 540                         break;
 541                 case Keymap::TOGGLE_HUD:
 542                         config.video.hud = !config.video.hud;
 543                         client_ctrl.SetHUD(config.video.hud);
 544                         break;
 545                 case Keymap::TOGGLE_DEBUG:
 546                         config.video.debug = !config.video.debug;
 547                         client_ctrl.SetDebug(config.video.debug);
 548                         break;
 549
 550                 default:
 551                         break;
 552         }
 553 }
 554
 555 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 556         if (!config.input.keyboard) return;
 557
 558         switch (keymap.Lookup(event)) {
 559                 case Keymap::MOVE_FORWARD:
 560                         rev.z = 0;
 561                         UpdateMovement();
 562                         break;
 563                 case Keymap::MOVE_BACKWARD:
 564                         fwd.z = 0;
 565                         UpdateMovement();
 566                         break;
 567                 case Keymap::MOVE_LEFT:
 568                         rev.x = 0;
 569                         UpdateMovement();
 570                         break;
 571                 case Keymap::MOVE_RIGHT:
 572                         fwd.x = 0;
 573                         UpdateMovement();
 574                         break;
 575                 case Keymap::MOVE_UP:
 576                         fwd.y = 0;
 577                         UpdateMovement();
 578                         break;
 579                 case Keymap::MOVE_DOWN:
 580                         rev.y = 0;
 581                         UpdateMovement();
 582                         break;
 583
 584                 case Keymap::PRIMARY:
 585                         player_ctrl.StopPrimaryAction();
 586                         break;
 587                 case Keymap::SECONDARY:
 588                         player_ctrl.StopSecondaryAction();
 589                         break;
 590                 case Keymap::TERTIARY:
 591                         player_ctrl.StopTertiaryAction();
 592                         break;
 593
 594                 default:
 595                         break;
 596         }
 597 }
 598
 599 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 600         if (!config.input.mouse) return;
 601         player_ctrl.TurnHead(
 602                 event.yrel * config.input.pitch_sensitivity,
 603                 event.xrel * config.input.yaw_sensitivity);
 604 }
 605
 606 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 607         if (!config.input.mouse) return;
 608
 609         switch (event.button) {
 610                 case SDL_BUTTON_LEFT:
 611                         player_ctrl.StartPrimaryAction();
 612                         break;
 613                 case SDL_BUTTON_RIGHT:
 614                         player_ctrl.StartSecondaryAction();
 615                         break;
 616                 case SDL_BUTTON_MIDDLE:
 617                         player_ctrl.StartTertiaryAction();
 618                         break;
 619         }
 620 }
 621
 622 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 623         if (!config.input.mouse) return;
 624
 625         switch (event.button) {
 626                 case SDL_BUTTON_LEFT:
 627                         player_ctrl.StopPrimaryAction();
 628                         break;
 629                 case SDL_BUTTON_RIGHT:
 630                         player_ctrl.StopSecondaryAction();
 631                         break;
 632                 case SDL_BUTTON_MIDDLE:
 633                         player_ctrl.StopTertiaryAction();
 634                         break;
 635         }
 636 }
 637
 638
 639 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 640         if (!config.input.mouse) return;
 641
 642         if (event.y < 0) {
 643                 InvRel(1);
 644         } else if (event.y > 0) {
 645                 InvRel(-1);
 646         }
 647 }
 648
 649 void Interface::UpdateMovement() {
 650         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 651 }
 652
 653 void Interface::InvAbs(int s) {
 654         slot = s % num_slots;
 655         while (slot < 0) {
 656                 slot += num_slots;
 657         }
 658         player_ctrl.SelectInventory(slot);
 659 }
 660
 661 void Interface::InvRel(int delta) {
 662         InvAbs(slot + delta);
 663 }
 664
 665
 666 Keymap::Keymap()
 667 : codemap{ NONE } {
 668
 669 }
 670
 671 void Keymap::Map(SDL_Scancode scancode, Action action) {
 672         if (scancode > MAX_SCANCODE) {
 673                 throw std::runtime_error("refusing to map scancode: too damn high");
 674         }
 675         codemap[scancode] = action;
 676 }
 677
 678 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 679         if (scancode < NUM_SCANCODES) {
 680                 return codemap[scancode];
 681         } else {
 682                 return NONE;
 683         }
 684 }
 685
 686
 687 void Keymap::LoadDefault() {
 688         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 689         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 690         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 691         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 692         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 693         Map(SDL_SCANCODE_A, MOVE_LEFT);
 694         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 695         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 696         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 697         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 698         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 699         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 700         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 701
 702         Map(SDL_SCANCODE_TAB, INV_NEXT);
 703         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 704         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 705         Map(SDL_SCANCODE_1, INV_1);
 706         Map(SDL_SCANCODE_2, INV_2);
 707         Map(SDL_SCANCODE_3, INV_3);
 708         Map(SDL_SCANCODE_4, INV_4);
 709         Map(SDL_SCANCODE_5, INV_5);
 710         Map(SDL_SCANCODE_6, INV_6);
 711         Map(SDL_SCANCODE_7, INV_7);
 712         Map(SDL_SCANCODE_8, INV_8);
 713         Map(SDL_SCANCODE_9, INV_9);
 714         Map(SDL_SCANCODE_0, INV_10);
 715
 716         Map(SDL_SCANCODE_INSERT, SECONDARY);
 717         Map(SDL_SCANCODE_RETURN, SECONDARY);
 718         Map(SDL_SCANCODE_MENU, TERTIARY);
 719         Map(SDL_SCANCODE_DELETE, PRIMARY);
 720         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 721
 722         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 723         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 724         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 725         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 726
 727         Map(SDL_SCANCODE_ESCAPE, EXIT);
 728 }
 729
 730
 731 void Keymap::Load(std::istream &is) {
 732         TokenStreamReader in(is);
 733         std::string key_name;
 734         std::string action_name;
 735         SDL_Scancode key;
 736         Action action;
 737         while (in.HasMore()) {
 738                 if (in.Peek().type == Token::STRING) {
 739                         in.ReadString(key_name);
 740                         key = SDL_GetScancodeFromName(key_name.c_str());
 741                 } else {
 742                         key = SDL_Scancode(in.GetInt());
 743                 }
 744                 in.Skip(Token::EQUALS);
 745                 in.ReadIdentifier(action_name);
 746                 action = StringToAction(action_name);
 747                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 748                         in.Skip(Token::SEMICOLON);
 749                 }
 750                 Map(key, action);
 751         }
 752 }
 753
 754 void Keymap::Save(std::ostream &out) {
 755         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 756                 if (codemap[i] == NONE) continue;
 757
 758                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 759                 if (str && *str) {
 760                         out << '"';
 761                         while (*str) {
 762                                 if (*str == '"') {
 763                                         out << "\\\"";
 764                                 } else {
 765                                         out << *str;
 766                                 }
 767                                 ++str;
 768                         }
 769                         out << '"';
 770                 } else {
 771                         out << i;
 772                 }
 773
 774                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 775         }
 776 }
 777
 778
 779 namespace {
 780
 781 std::map<std::string, Keymap::Action> action_map = {
 782         { "none", Keymap::NONE },
 783         { "move_forward", Keymap::MOVE_FORWARD },
 784         { "move_backward", Keymap::MOVE_BACKWARD },
 785         { "move_left", Keymap::MOVE_LEFT },
 786         { "move_right", Keymap::MOVE_RIGHT },
 787         { "move_up", Keymap::MOVE_UP },
 788         { "move_down", Keymap::MOVE_DOWN },
 789
 790         { "primary", Keymap::PRIMARY },
 791         { "secondary", Keymap::SECONDARY },
 792         { "tertiary", Keymap::TERTIARY },
 793
 794         { "inventory_next", Keymap::INV_NEXT },
 795         { "inventory_prev", Keymap::INV_PREVIOUS },
 796         { "inventory_1", Keymap::INV_1 },
 797         { "inventory_2", Keymap::INV_2 },
 798         { "inventory_3", Keymap::INV_3 },
 799         { "inventory_4", Keymap::INV_4 },
 800         { "inventory_5", Keymap::INV_5 },
 801         { "inventory_6", Keymap::INV_6 },
 802         { "inventory_7", Keymap::INV_7 },
 803         { "inventory_8", Keymap::INV_8 },
 804         { "inventory_9", Keymap::INV_9 },
 805         { "inventory_10", Keymap::INV_10 },
 806
 807         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 808         { "toggle_video", Keymap::TOGGLE_VIDEO },
 809         { "toggle_hud", Keymap::TOGGLE_HUD },
 810         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 811
 812         { "exit", Keymap::EXIT },
 813 };
 814
 815 }
 816
 817 const char *Keymap::ActionToString(Action action) {
 818         for (const auto &entry : action_map) {
 819                 if (action == entry.second) {
 820                         return entry.first.c_str();
 821                 }
 822         }
 823         return "none";
 824 }
 825
 826 Keymap::Action Keymap::StringToAction(const std::string &str) {
 827         auto entry = action_map.find(str);
 828         if (entry != action_map.end()) {
 829                 return entry->second;
 830         } else {
 831                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 832                 return NONE;
 833         }
 834 }
 835
 836 }