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 , dirty(true)
  41 , aim_world()
  42 , aim_entity() {
  43         player.GetEntity().SetController(*this);
  44 }
  45
  46 void PlayerController::SetMovement(const glm::vec3 &m) noexcept {
  47         if (dot(m, m) > 1.0f) {
  48                 move_dir = normalize(m);
  49         } else {
  50                 move_dir = m;
  51         }
  52         Invalidate();
  53 }
  54
  55 glm::vec3 PlayerController::ControlForce(const EntityState &s) const {
  56         glm::vec3 target(rotateY(move_dir * player.GetEntity().MaxVelocity(), s.yaw) - s.velocity);
  57         return target * player.GetEntity().MaxControlForce();
  58 }
  59
  60 void PlayerController::TurnHead(float dp, float dy) noexcept {
  61         player.GetEntity().TurnHead(dp, dy);
  62 }
  63
  64 float PlayerController::GetPitch() const noexcept {
  65         return player.GetEntity().Pitch();
  66 }
  67
  68 float PlayerController::GetYaw() const noexcept {
  69         return player.GetEntity().Yaw();
  70 }
  71
  72 void PlayerController::SelectInventory(int i) noexcept {
  73         player.SetInventorySlot(i);
  74 }
  75
  76 int PlayerController::InventorySlot() const noexcept {
  77         return player.GetInventorySlot();
  78 }
  79
  80 void PlayerController::Invalidate() noexcept {
  81         dirty = true;
  82 }
  83
  84 void PlayerController::UpdatePlayer() noexcept {
  85         if (dirty) {
  86                 Ray aim = player.Aim();
  87                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
  88                         aim_world = WorldCollision();
  89                 }
  90                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
  91                         aim_entity = EntityCollision();
  92                 }
  93                 if (aim_world && aim_entity) {
  94                         // got both, pick the closest one
  95                         if (aim_world.depth < aim_entity.depth) {
  96                                 aim_entity = EntityCollision();
  97                         } else {
  98                                 aim_world = WorldCollision();
  99                         }
 100                 }
 101                 dirty = false;
 102         }
 103 }
 104
 105
 106 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
 107 : PlayerController(world, player)
 108 , manip(manip)
 109 , place_timer(0.25f)
 110 , remove_timer(0.25f) {
 111
 112 }
 113
 114 void DirectInput::Update(Entity &, float dt) {
 115         Invalidate(); // world has changed in the meantime
 116         UpdatePlayer();
 117
 118         remove_timer.Update(dt);
 119         if (remove_timer.Hit()) {
 120                 RemoveBlock();
 121         }
 122
 123         place_timer.Update(dt);
 124         if (place_timer.Hit()) {
 125                 PlaceBlock();
 126         }
 127 }
 128
 129 void DirectInput::StartPrimaryAction() {
 130         if (!remove_timer.Running()) {
 131                 RemoveBlock();
 132                 remove_timer.Start();
 133         }
 134 }
 135
 136 void DirectInput::StopPrimaryAction() {
 137         remove_timer.Stop();
 138 }
 139
 140 void DirectInput::StartSecondaryAction() {
 141         if (!place_timer.Running()) {
 142                 PlaceBlock();
 143                 place_timer.Start();
 144         }
 145 }
 146
 147 void DirectInput::StopSecondaryAction() {
 148         place_timer.Stop();
 149 }
 150
 151 void DirectInput::StartTertiaryAction() {
 152         PickBlock();
 153 }
 154
 155 void DirectInput::StopTertiaryAction() {
 156         // nothing
 157 }
 158
 159 void DirectInput::PickBlock() {
 160         UpdatePlayer();
 161         if (!BlockFocus()) return;
 162         SelectInventory(BlockFocus().GetBlock().type - 1);
 163 }
 164
 165 void DirectInput::PlaceBlock() {
 166         UpdatePlayer();
 167         if (!BlockFocus()) return;
 168
 169         BlockLookup next_block(BlockFocus().chunk, BlockFocus().BlockPos(), Block::NormalFace(BlockFocus().normal));
 170         if (!next_block) {
 171                 return;
 172         }
 173         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(InventorySlot() + 1));
 174         Invalidate();
 175 }
 176
 177 void DirectInput::RemoveBlock() {
 178         UpdatePlayer();
 179         if (!BlockFocus()) return;
 180         manip.SetBlock(BlockFocus().GetChunk(), BlockFocus().block, Block(0));
 181         Invalidate();
 182 }
 183
 184
 185 HUD::HUD(Environment &env, Config &config, const Player &player)
 186 : env(env)
 187 , config(config)
 188 , player(player)
 189 // block focus
 190 , outline()
 191 , outline_transform(1.0f)
 192 , outline_visible(false)
 193 // "inventory"
 194 , block()
 195 , block_buf()
 196 , block_transform(1.0f)
 197 , block_label()
 198 , block_visible(false)
 199 // debug overlay
 200 , counter_text()
 201 , position_text()
 202 , orientation_text()
 203 , block_text()
 204 , show_block(false)
 205 , show_entity(false)
 206 // message box
 207 , messages(env.assets.small_ui_font)
 208 , msg_timer(5000)
 209 , msg_keep(false)
 210 // crosshair
 211 , crosshair() {
 212         const float ls = env.assets.small_ui_font.LineSkip();
 213
 214         // "inventory"
 215         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 216         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 217         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 218         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 219         block_label.Position(
 220                 glm::vec3(50.0f, 85.0f, 0.0f),
 221                 Gravity::NORTH_WEST,
 222                 Gravity::NORTH
 223         );
 224         block_label.Foreground(glm::vec4(1.0f));
 225         block_label.Background(glm::vec4(0.5f));
 226
 227         // debug overlay
 228         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 229         counter_text.Foreground(glm::vec4(1.0f));
 230         counter_text.Background(glm::vec4(0.5f));
 231         position_text.Position(glm::vec3(-25.0f, 25.0f + ls, 0.0f), Gravity::NORTH_EAST);
 232         position_text.Foreground(glm::vec4(1.0f));
 233         position_text.Background(glm::vec4(0.5f));
 234         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * ls, 0.0f), Gravity::NORTH_EAST);
 235         orientation_text.Foreground(glm::vec4(1.0f));
 236         orientation_text.Background(glm::vec4(0.5f));
 237         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * ls, 0.0f), Gravity::NORTH_EAST);
 238         block_text.Foreground(glm::vec4(1.0f));
 239         block_text.Background(glm::vec4(0.5f));
 240         block_text.Set(env.assets.small_ui_font, "Block: none");
 241         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * ls, 0.0f), Gravity::NORTH_EAST);
 242         entity_text.Foreground(glm::vec4(1.0f));
 243         entity_text.Background(glm::vec4(0.5f));
 244         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 245
 246         // message box
 247         messages.Position(glm::vec3(25.0f, -25.0f - 2 * ls, 0.0f), Gravity::SOUTH_WEST);
 248         messages.Foreground(glm::vec4(1.0f));
 249         messages.Background(glm::vec4(0.5f));
 250
 251         // crosshair
 252         PrimitiveMesh::Buffer buf;
 253         buf.vertices = std::vector<glm::vec3>({
 254                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 255                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 256         });
 257         buf.indices = std::vector<PrimitiveMesh::Index>({
 258                 0, 1, 2, 3
 259         });
 260         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f, 1.0f });
 261         crosshair.Update(buf);
 262 }
 263
 264 namespace {
 265
 266 PrimitiveMesh::Buffer outl_buf;
 267
 268 }
 269
 270 void HUD::FocusBlock(const Chunk &chunk, int index) {
 271         const Block &block = chunk.BlockAt(index);
 272         const BlockType &type = chunk.Type(index);
 273         outl_buf.Clear();
 274         type.OutlinePrimitiveMesh(outl_buf);
 275         outline.Update(outl_buf);
 276         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 277         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 278         outline_transform *= glm::scale(glm::vec3(1.005f));
 279         outline_visible = true;
 280         {
 281                 std::stringstream s;
 282                 s << "Block: "
 283                         << type.label
 284                         << ", face: " << block.GetFace()
 285                         << ", turn: " << block.GetTurn();
 286                 block_text.Set(env.assets.small_ui_font, s.str());
 287         }
 288         show_block = true;
 289         show_entity = false;
 290 }
 291
 292 void HUD::FocusEntity(const Entity &entity) {
 293         {
 294                 std::stringstream s;
 295                 s << "Entity: " << entity.Name();
 296                 entity_text.Set(env.assets.small_ui_font, s.str());
 297         }
 298         show_block = false;
 299         show_entity = true;
 300 }
 301
 302 void HUD::FocusNone() {
 303         outline_visible = false;
 304         show_block = false;
 305         show_entity = false;
 306 }
 307
 308 void HUD::DisplayNone() {
 309         block_visible = false;
 310 }
 311
 312 void HUD::Display(const BlockType &type) {
 313         block_buf.Clear();
 314         type.FillEntityMesh(block_buf);
 315         block.Update(block_buf);
 316
 317         block_label.Set(env.assets.small_ui_font, type.label);
 318
 319         block_visible = type.visible;
 320 }
 321
 322
 323 void HUD::UpdateDebug() {
 324         UpdateCounter();
 325         UpdatePosition();
 326         UpdateOrientation();
 327 }
 328
 329 void HUD::UpdateCounter() {
 330         std::stringstream s;
 331         s << std::setprecision(3) <<
 332                 "avg: " << env.counter.Average().running << "ms, "
 333                 "peak: " << env.counter.Peak().running << "ms";
 334         std::string text = s.str();
 335         counter_text.Set(env.assets.small_ui_font, text);
 336 }
 337
 338 void HUD::UpdatePosition() {
 339         std::stringstream s;
 340         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 341         position_text.Set(env.assets.small_ui_font, s.str());
 342 }
 343
 344 void HUD::UpdateOrientation() {
 345         //std::stringstream s;
 346         //s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 347         //      << ", yaw: " << rad2deg(ctrl.Yaw());
 348         //orientation_text.Set(env.assets.small_ui_font, s.str());
 349 }
 350
 351 void HUD::PostMessage(const char *msg) {
 352         messages.PushLine(msg);
 353         msg_timer.Reset();
 354         msg_timer.Start();
 355         std::cout << msg << std::endl;
 356 }
 357
 358
 359 void HUD::Update(int dt) {
 360         msg_timer.Update(dt);
 361         if (msg_timer.HitOnce()) {
 362                 msg_timer.Stop();
 363         }
 364
 365         if (config.video.debug) {
 366                 if (env.counter.Changed()) {
 367                         UpdateCounter();
 368                 }
 369                 UpdatePosition();
 370                 UpdateOrientation();
 371         }
 372 }
 373
 374 void HUD::Render(Viewport &viewport) noexcept {
 375         // block focus
 376         if (outline_visible && config.video.world) {
 377                 PlainColor &outline_prog = viewport.WorldColorProgram();
 378                 outline_prog.SetM(outline_transform);
 379                 outline.DrawLines();
 380         }
 381
 382         // clear depth buffer so everything renders above the world
 383         viewport.ClearDepth();
 384
 385         if (config.video.hud) {
 386                 // "inventory"
 387                 if (block_visible) {
 388                         DirectionalLighting &world_prog = viewport.HUDProgram();
 389                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 390                         // disable distance fog
 391                         world_prog.SetFogDensity(0.0f);
 392
 393                         viewport.DisableBlending();
 394                         world_prog.SetM(block_transform);
 395                         block.Draw();
 396                         block_label.Render(viewport);
 397                 }
 398
 399                 // message box
 400                 if (msg_keep || msg_timer.Running()) {
 401                         messages.Render(viewport);
 402                 }
 403
 404                 // crosshair
 405                 PlainColor &outline_prog = viewport.HUDColorProgram();
 406                 viewport.EnableInvertBlending();
 407                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 408                 outline_prog.SetM(viewport.Cursor());
 409                 crosshair.DrawLines();
 410         }
 411
 412         // debug overlay
 413         if (config.video.debug) {
 414                 counter_text.Render(viewport);
 415                 position_text.Render(viewport);
 416                 orientation_text.Render(viewport);
 417                 if (show_block) {
 418                         block_text.Render(viewport);
 419                 } else if (show_entity) {
 420                         entity_text.Render(viewport);
 421                 }
 422         }
 423 }
 424
 425
 426 InteractiveManipulator::InteractiveManipulator(Audio &audio, const SoundBank &sounds, Entity &player)
 427 : player(player)
 428 , audio(audio)
 429 , sounds(sounds) {
 430
 431 }
 432
 433 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 434         const BlockType &old_type = chunk.Type(index);
 435         chunk.SetBlock(index, block);
 436         const BlockType &new_type = chunk.Type(index);
 437         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 438         if (new_type.id == 0) {
 439                 if (old_type.remove_sound >= 0) {
 440                         audio.Play(sounds[old_type.remove_sound], coords);
 441                 }
 442         } else {
 443                 if (new_type.place_sound >= 0) {
 444                         audio.Play(sounds[new_type.place_sound], coords);
 445                 }
 446         }
 447 }
 448
 449
 450 Interface::Interface(
 451         Config &config,
 452         const Keymap &keymap,
 453         PlayerController &pc,
 454         ClientController &cc)
 455 : config(config)
 456 , keymap(keymap)
 457 , player_ctrl(pc)
 458 , client_ctrl(cc)
 459 , fwd(0)
 460 , rev(0)
 461 , slot(0)
 462 , num_slots(10)
 463 , locked(false) {
 464
 465 }
 466
 467 void Interface::Lock() {
 468         fwd = glm::ivec3(0);
 469         rev = glm::ivec3(0);
 470         locked = true;
 471 }
 472
 473 void Interface::Unlock() {
 474         locked = false;
 475 }
 476
 477 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 478         if (!config.input.keyboard) return;
 479
 480         Keymap::Action action = keymap.Lookup(event);
 481         switch (action) {
 482                 case Keymap::MOVE_FORWARD:
 483                         rev.z = 1;
 484                         UpdateMovement();
 485                         break;
 486                 case Keymap::MOVE_BACKWARD:
 487                         fwd.z = 1;
 488                         UpdateMovement();
 489                         break;
 490                 case Keymap::MOVE_LEFT:
 491                         rev.x = 1;
 492                         UpdateMovement();
 493                         break;
 494                 case Keymap::MOVE_RIGHT:
 495                         fwd.x = 1;
 496                         UpdateMovement();
 497                         break;
 498                 case Keymap::MOVE_UP:
 499                         fwd.y = 1;
 500                         UpdateMovement();
 501                         break;
 502                 case Keymap::MOVE_DOWN:
 503                         rev.y = 1;
 504                         UpdateMovement();
 505                         break;
 506
 507                 case Keymap::PRIMARY:
 508                         player_ctrl.StartPrimaryAction();
 509                         break;
 510                 case Keymap::SECONDARY:
 511                         player_ctrl.StartSecondaryAction();
 512                         break;
 513                 case Keymap::TERTIARY:
 514                         player_ctrl.StartTertiaryAction();
 515                         break;
 516
 517                 case Keymap::INV_NEXT:
 518                         InvRel(1);
 519                         break;
 520                 case Keymap::INV_PREVIOUS:
 521                         InvRel(-1);
 522                         break;
 523                 case Keymap::INV_1:
 524                 case Keymap::INV_2:
 525                 case Keymap::INV_3:
 526                 case Keymap::INV_4:
 527                 case Keymap::INV_5:
 528                 case Keymap::INV_6:
 529                 case Keymap::INV_7:
 530                 case Keymap::INV_8:
 531                 case Keymap::INV_9:
 532                 case Keymap::INV_10:
 533                         InvAbs(action - Keymap::INV_1);
 534                         break;
 535
 536                 case Keymap::EXIT:
 537                         client_ctrl.Exit();
 538                         break;
 539
 540                 case Keymap::TOGGLE_AUDIO:
 541                         config.audio.enabled = !config.audio.enabled;
 542                         client_ctrl.SetAudio(config.audio.enabled);
 543                         break;
 544                 case Keymap::TOGGLE_VIDEO:
 545                         config.video.world = !config.video.world;
 546                         client_ctrl.SetVideo(config.video.world);
 547                         break;
 548                 case Keymap::TOGGLE_HUD:
 549                         config.video.hud = !config.video.hud;
 550                         client_ctrl.SetHUD(config.video.hud);
 551                         break;
 552                 case Keymap::TOGGLE_DEBUG:
 553                         config.video.debug = !config.video.debug;
 554                         client_ctrl.SetDebug(config.video.debug);
 555                         break;
 556
 557                 default:
 558                         break;
 559         }
 560 }
 561
 562 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 563         if (!config.input.keyboard) return;
 564
 565         switch (keymap.Lookup(event)) {
 566                 case Keymap::MOVE_FORWARD:
 567                         rev.z = 0;
 568                         UpdateMovement();
 569                         break;
 570                 case Keymap::MOVE_BACKWARD:
 571                         fwd.z = 0;
 572                         UpdateMovement();
 573                         break;
 574                 case Keymap::MOVE_LEFT:
 575                         rev.x = 0;
 576                         UpdateMovement();
 577                         break;
 578                 case Keymap::MOVE_RIGHT:
 579                         fwd.x = 0;
 580                         UpdateMovement();
 581                         break;
 582                 case Keymap::MOVE_UP:
 583                         fwd.y = 0;
 584                         UpdateMovement();
 585                         break;
 586                 case Keymap::MOVE_DOWN:
 587                         rev.y = 0;
 588                         UpdateMovement();
 589                         break;
 590
 591                 case Keymap::PRIMARY:
 592                         player_ctrl.StopPrimaryAction();
 593                         break;
 594                 case Keymap::SECONDARY:
 595                         player_ctrl.StopSecondaryAction();
 596                         break;
 597                 case Keymap::TERTIARY:
 598                         player_ctrl.StopTertiaryAction();
 599                         break;
 600
 601                 default:
 602                         break;
 603         }
 604 }
 605
 606 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 607         if (locked || !config.input.mouse) return;
 608         player_ctrl.TurnHead(
 609                 event.yrel * config.input.pitch_sensitivity,
 610                 event.xrel * config.input.yaw_sensitivity);
 611 }
 612
 613 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 614         if (!config.input.mouse) return;
 615
 616         switch (event.button) {
 617                 case SDL_BUTTON_LEFT:
 618                         player_ctrl.StartPrimaryAction();
 619                         break;
 620                 case SDL_BUTTON_RIGHT:
 621                         player_ctrl.StartSecondaryAction();
 622                         break;
 623                 case SDL_BUTTON_MIDDLE:
 624                         player_ctrl.StartTertiaryAction();
 625                         break;
 626         }
 627 }
 628
 629 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 630         if (!config.input.mouse) return;
 631
 632         switch (event.button) {
 633                 case SDL_BUTTON_LEFT:
 634                         player_ctrl.StopPrimaryAction();
 635                         break;
 636                 case SDL_BUTTON_RIGHT:
 637                         player_ctrl.StopSecondaryAction();
 638                         break;
 639                 case SDL_BUTTON_MIDDLE:
 640                         player_ctrl.StopTertiaryAction();
 641                         break;
 642         }
 643 }
 644
 645
 646 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 647         if (!config.input.mouse) return;
 648
 649         if (event.y < 0) {
 650                 InvRel(1);
 651         } else if (event.y > 0) {
 652                 InvRel(-1);
 653         }
 654 }
 655
 656 void Interface::UpdateMovement() {
 657         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 658 }
 659
 660 void Interface::InvAbs(int s) {
 661         slot = s % num_slots;
 662         while (slot < 0) {
 663                 slot += num_slots;
 664         }
 665         player_ctrl.SelectInventory(slot);
 666 }
 667
 668 void Interface::InvRel(int delta) {
 669         InvAbs(slot + delta);
 670 }
 671
 672
 673 Keymap::Keymap()
 674 : codemap{ NONE } {
 675
 676 }
 677
 678 void Keymap::Map(SDL_Scancode scancode, Action action) {
 679         if (scancode > MAX_SCANCODE) {
 680                 throw std::runtime_error("refusing to map scancode: too damn high");
 681         }
 682         codemap[scancode] = action;
 683 }
 684
 685 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 686         if (scancode < NUM_SCANCODES) {
 687                 return codemap[scancode];
 688         } else {
 689                 return NONE;
 690         }
 691 }
 692
 693
 694 void Keymap::LoadDefault() {
 695         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 696         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 697         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 698         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 699         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 700         Map(SDL_SCANCODE_A, MOVE_LEFT);
 701         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 702         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 703         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 704         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 705         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 706         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 707         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 708
 709         Map(SDL_SCANCODE_TAB, INV_NEXT);
 710         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 711         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 712         Map(SDL_SCANCODE_1, INV_1);
 713         Map(SDL_SCANCODE_2, INV_2);
 714         Map(SDL_SCANCODE_3, INV_3);
 715         Map(SDL_SCANCODE_4, INV_4);
 716         Map(SDL_SCANCODE_5, INV_5);
 717         Map(SDL_SCANCODE_6, INV_6);
 718         Map(SDL_SCANCODE_7, INV_7);
 719         Map(SDL_SCANCODE_8, INV_8);
 720         Map(SDL_SCANCODE_9, INV_9);
 721         Map(SDL_SCANCODE_0, INV_10);
 722
 723         Map(SDL_SCANCODE_INSERT, SECONDARY);
 724         Map(SDL_SCANCODE_RETURN, SECONDARY);
 725         Map(SDL_SCANCODE_MENU, TERTIARY);
 726         Map(SDL_SCANCODE_DELETE, PRIMARY);
 727         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 728
 729         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 730         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 731         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 732         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 733
 734         Map(SDL_SCANCODE_ESCAPE, EXIT);
 735 }
 736
 737
 738 void Keymap::Load(std::istream &is) {
 739         TokenStreamReader in(is);
 740         std::string key_name;
 741         std::string action_name;
 742         SDL_Scancode key;
 743         Action action;
 744         while (in.HasMore()) {
 745                 if (in.Peek().type == Token::STRING) {
 746                         in.ReadString(key_name);
 747                         key = SDL_GetScancodeFromName(key_name.c_str());
 748                 } else {
 749                         key = SDL_Scancode(in.GetInt());
 750                 }
 751                 in.Skip(Token::EQUALS);
 752                 in.ReadIdentifier(action_name);
 753                 action = StringToAction(action_name);
 754                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 755                         in.Skip(Token::SEMICOLON);
 756                 }
 757                 Map(key, action);
 758         }
 759 }
 760
 761 void Keymap::Save(std::ostream &out) {
 762         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 763                 if (codemap[i] == NONE) continue;
 764
 765                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 766                 if (str && *str) {
 767                         out << '"';
 768                         while (*str) {
 769                                 if (*str == '"') {
 770                                         out << "\\\"";
 771                                 } else {
 772                                         out << *str;
 773                                 }
 774                                 ++str;
 775                         }
 776                         out << '"';
 777                 } else {
 778                         out << i;
 779                 }
 780
 781                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 782         }
 783 }
 784
 785
 786 namespace {
 787
 788 std::map<std::string, Keymap::Action> action_map = {
 789         { "none", Keymap::NONE },
 790         { "move_forward", Keymap::MOVE_FORWARD },
 791         { "move_backward", Keymap::MOVE_BACKWARD },
 792         { "move_left", Keymap::MOVE_LEFT },
 793         { "move_right", Keymap::MOVE_RIGHT },
 794         { "move_up", Keymap::MOVE_UP },
 795         { "move_down", Keymap::MOVE_DOWN },
 796
 797         { "primary", Keymap::PRIMARY },
 798         { "secondary", Keymap::SECONDARY },
 799         { "tertiary", Keymap::TERTIARY },
 800
 801         { "inventory_next", Keymap::INV_NEXT },
 802         { "inventory_prev", Keymap::INV_PREVIOUS },
 803         { "inventory_1", Keymap::INV_1 },
 804         { "inventory_2", Keymap::INV_2 },
 805         { "inventory_3", Keymap::INV_3 },
 806         { "inventory_4", Keymap::INV_4 },
 807         { "inventory_5", Keymap::INV_5 },
 808         { "inventory_6", Keymap::INV_6 },
 809         { "inventory_7", Keymap::INV_7 },
 810         { "inventory_8", Keymap::INV_8 },
 811         { "inventory_9", Keymap::INV_9 },
 812         { "inventory_10", Keymap::INV_10 },
 813
 814         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 815         { "toggle_video", Keymap::TOGGLE_VIDEO },
 816         { "toggle_hud", Keymap::TOGGLE_HUD },
 817         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 818
 819         { "exit", Keymap::EXIT },
 820 };
 821
 822 }
 823
 824 const char *Keymap::ActionToString(Action action) {
 825         for (const auto &entry : action_map) {
 826                 if (action == entry.second) {
 827                         return entry.first.c_str();
 828                 }
 829         }
 830         return "none";
 831 }
 832
 833 Keymap::Action Keymap::StringToAction(const std::string &str) {
 834         auto entry = action_map.find(str);
 835         if (entry != action_map.end()) {
 836                 return entry->second;
 837         } else {
 838                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 839                 return NONE;
 840         }
 841 }
 842
 843 }