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