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