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