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 = 0.005f;
  87         if (dirty) {
  88                 player.GetEntity().Orientation(glm::quat(glm::vec3(pitch, yaw, 0.0f)));
  89                 player.GetEntity().TargetVelocity(glm::rotateY(move_dir * max_vel, yaw));
  90
  91                 Ray aim = player.Aim();
  92                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
  93                         aim_world = WorldCollision();
  94                 }
  95                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
  96                         aim_entity = EntityCollision();
  97                 }
  98                 if (aim_world && aim_entity) {
  99                         // got both, pick the closest one
 100                         if (aim_world.depth < aim_entity.depth) {
 101                                 aim_entity = EntityCollision();
 102                         } else {
 103                                 aim_world = WorldCollision();
 104                         }
 105                 }
 106                 dirty = false;
 107         }
 108 }
 109
 110
 111 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
 112 : PlayerController(world, player)
 113 , manip(manip)
 114 , place_timer(256)
 115 , remove_timer(256) {
 116
 117 }
 118
 119 void DirectInput::Update(int dt) {
 120         Invalidate(); // world has changed in the meantime
 121         UpdatePlayer();
 122
 123         remove_timer.Update(dt);
 124         if (remove_timer.Hit()) {
 125                 RemoveBlock();
 126         }
 127
 128         place_timer.Update(dt);
 129         if (place_timer.Hit()) {
 130                 PlaceBlock();
 131         }
 132 }
 133
 134 void DirectInput::StartPrimaryAction() {
 135         if (!remove_timer.Running()) {
 136                 RemoveBlock();
 137                 remove_timer.Start();
 138         }
 139 }
 140
 141 void DirectInput::StopPrimaryAction() {
 142         remove_timer.Stop();
 143 }
 144
 145 void DirectInput::StartSecondaryAction() {
 146         if (!place_timer.Running()) {
 147                 PlaceBlock();
 148                 place_timer.Start();
 149         }
 150 }
 151
 152 void DirectInput::StopSecondaryAction() {
 153         place_timer.Stop();
 154 }
 155
 156 void DirectInput::StartTertiaryAction() {
 157         PickBlock();
 158 }
 159
 160 void DirectInput::StopTertiaryAction() {
 161         // nothing
 162 }
 163
 164 void DirectInput::PickBlock() {
 165         UpdatePlayer();
 166         if (!BlockFocus()) return;
 167         SelectInventory(BlockFocus().GetBlock().type - 1);
 168 }
 169
 170 void DirectInput::PlaceBlock() {
 171         UpdatePlayer();
 172         if (!BlockFocus()) return;
 173
 174         BlockLookup next_block(BlockFocus().chunk, BlockFocus().BlockPos(), Block::NormalFace(BlockFocus().normal));
 175         if (!next_block) {
 176                 return;
 177         }
 178         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(InventorySlot() + 1));
 179         Invalidate();
 180 }
 181
 182 void DirectInput::RemoveBlock() {
 183         UpdatePlayer();
 184         if (!BlockFocus()) return;
 185         manip.SetBlock(BlockFocus().GetChunk(), BlockFocus().block, Block(0));
 186         Invalidate();
 187 }
 188
 189
 190 HUD::HUD(Environment &env, Config &config, const Player &player)
 191 : env(env)
 192 , config(config)
 193 , player(player)
 194 // block focus
 195 , outline()
 196 , outline_transform(1.0f)
 197 , outline_visible(false)
 198 // "inventory"
 199 , block()
 200 , block_buf()
 201 , block_transform(1.0f)
 202 , block_label()
 203 , block_visible(false)
 204 // debug overlay
 205 , counter_text()
 206 , position_text()
 207 , orientation_text()
 208 , block_text()
 209 , show_block(false)
 210 , show_entity(false)
 211 // message box
 212 , messages(env.assets.small_ui_font)
 213 , msg_timer(5000)
 214 // crosshair
 215 , crosshair() {
 216         // "inventory"
 217         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 218         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 219         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 220         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 221         block_label.Position(
 222                 glm::vec3(50.0f, 85.0f, 0.0f),
 223                 Gravity::NORTH_WEST,
 224                 Gravity::NORTH
 225         );
 226         block_label.Foreground(glm::vec4(1.0f));
 227         block_label.Background(glm::vec4(0.5f));
 228
 229         // debug overlay
 230         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 231         counter_text.Foreground(glm::vec4(1.0f));
 232         counter_text.Background(glm::vec4(0.5f));
 233         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 234         position_text.Foreground(glm::vec4(1.0f));
 235         position_text.Background(glm::vec4(0.5f));
 236         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 237         orientation_text.Foreground(glm::vec4(1.0f));
 238         orientation_text.Background(glm::vec4(0.5f));
 239         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 240         block_text.Foreground(glm::vec4(1.0f));
 241         block_text.Background(glm::vec4(0.5f));
 242         block_text.Set(env.assets.small_ui_font, "Block: none");
 243         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 244         entity_text.Foreground(glm::vec4(1.0f));
 245         entity_text.Background(glm::vec4(0.5f));
 246         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 247
 248         // message box
 249         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 250         messages.Foreground(glm::vec4(1.0f));
 251         messages.Background(glm::vec4(0.5f));
 252
 253         // crosshair
 254         OutlineMesh::Buffer buf;
 255         buf.vertices = std::vector<glm::vec3>({
 256                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 257                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 258         });
 259         buf.indices = std::vector<OutlineMesh::Index>({
 260                 0, 1, 2, 3
 261         });
 262         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f });
 263         crosshair.Update(buf);
 264 }
 265
 266 namespace {
 267
 268 OutlineMesh::Buffer outl_buf;
 269
 270 }
 271
 272 void HUD::FocusBlock(const Chunk &chunk, int index) {
 273         const Block &block = chunk.BlockAt(index);
 274         const BlockType &type = chunk.Type(index);
 275         outl_buf.Clear();
 276         type.FillOutlineMesh(outl_buf);
 277         outline.Update(outl_buf);
 278         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 279         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 280         outline_transform *= glm::scale(glm::vec3(1.005f));
 281         outline_visible = true;
 282         {
 283                 std::stringstream s;
 284                 s << "Block: "
 285                         << type.label
 286                         << ", face: " << block.GetFace()
 287                         << ", turn: " << block.GetTurn();
 288                 block_text.Set(env.assets.small_ui_font, s.str());
 289         }
 290         show_block = true;
 291         show_entity = false;
 292 }
 293
 294 void HUD::FocusEntity(const Entity &entity) {
 295         {
 296                 std::stringstream s;
 297                 s << "Entity: " << entity.Name();
 298                 entity_text.Set(env.assets.small_ui_font, s.str());
 299         }
 300         show_block = false;
 301         show_entity = true;
 302 }
 303
 304 void HUD::FocusNone() {
 305         outline_visible = false;
 306         show_block = false;
 307         show_entity = false;
 308 }
 309
 310 void HUD::DisplayNone() {
 311         block_visible = false;
 312 }
 313
 314 void HUD::Display(const BlockType &type) {
 315         block_buf.Clear();
 316         type.FillEntityMesh(block_buf);
 317         block.Update(block_buf);
 318
 319         block_label.Set(env.assets.small_ui_font, type.label);
 320
 321         block_visible = type.visible;
 322 }
 323
 324
 325 void HUD::UpdateDebug() {
 326         UpdateCounter();
 327         UpdatePosition();
 328         UpdateOrientation();
 329 }
 330
 331 void HUD::UpdateCounter() {
 332         std::stringstream s;
 333         s << std::setprecision(3) <<
 334                 "avg: " << env.counter.Average().running << "ms, "
 335                 "peak: " << env.counter.Peak().running << "ms";
 336         std::string text = s.str();
 337         counter_text.Set(env.assets.small_ui_font, text);
 338 }
 339
 340 void HUD::UpdatePosition() {
 341         std::stringstream s;
 342         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 343         position_text.Set(env.assets.small_ui_font, s.str());
 344 }
 345
 346 void HUD::UpdateOrientation() {
 347         //std::stringstream s;
 348         //s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 349         //      << ", yaw: " << rad2deg(ctrl.Yaw());
 350         //orientation_text.Set(env.assets.small_ui_font, s.str());
 351 }
 352
 353 void HUD::PostMessage(const char *msg) {
 354         messages.PushLine(msg);
 355         msg_timer.Reset();
 356         msg_timer.Start();
 357         std::cout << msg << std::endl;
 358 }
 359
 360
 361 void HUD::Update(int dt) {
 362         msg_timer.Update(dt);
 363         if (msg_timer.HitOnce()) {
 364                 msg_timer.Stop();
 365         }
 366
 367         if (config.video.debug) {
 368                 if (env.counter.Changed()) {
 369                         UpdateCounter();
 370                 }
 371                 UpdatePosition();
 372                 UpdateOrientation();
 373         }
 374 }
 375
 376 void HUD::Render(Viewport &viewport) noexcept {
 377         // block focus
 378         if (outline_visible && config.video.world) {
 379                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 380                 outline_prog.SetM(outline_transform);
 381                 outline.Draw();
 382         }
 383
 384         // clear depth buffer so everything renders above the world
 385         viewport.ClearDepth();
 386
 387         if (config.video.hud) {
 388                 // "inventory"
 389                 if (block_visible) {
 390                         DirectionalLighting &world_prog = viewport.HUDProgram();
 391                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 392                         // disable distance fog
 393                         world_prog.SetFogDensity(0.0f);
 394
 395                         viewport.DisableBlending();
 396                         world_prog.SetM(block_transform);
 397                         block.Draw();
 398                         block_label.Render(viewport);
 399                 }
 400
 401                 // message box
 402                 if (msg_timer.Running()) {
 403                         messages.Render(viewport);
 404                 }
 405
 406                 // crosshair
 407                 PlainColor &outline_prog = viewport.HUDOutlineProgram();
 408                 viewport.EnableInvertBlending();
 409                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 410                 outline_prog.SetM(viewport.Cursor());
 411                 crosshair.Draw();
 412         }
 413
 414         // debug overlay
 415         if (config.video.debug) {
 416                 counter_text.Render(viewport);
 417                 position_text.Render(viewport);
 418                 orientation_text.Render(viewport);
 419                 if (show_block) {
 420                         block_text.Render(viewport);
 421                 } else if (show_entity) {
 422                         entity_text.Render(viewport);
 423                 }
 424         }
 425 }
 426
 427
 428 InteractiveManipulator::InteractiveManipulator(Audio &audio, const SoundBank &sounds, Entity &player)
 429 : player(player)
 430 , audio(audio)
 431 , sounds(sounds) {
 432
 433 }
 434
 435 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 436         const BlockType &old_type = chunk.Type(index);
 437         chunk.SetBlock(index, block);
 438         const BlockType &new_type = chunk.Type(index);
 439         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 440         if (new_type.id == 0) {
 441                 if (old_type.remove_sound >= 0) {
 442                         audio.Play(sounds[old_type.remove_sound], coords);
 443                 }
 444         } else {
 445                 if (new_type.place_sound >= 0) {
 446                         audio.Play(sounds[new_type.place_sound], coords);
 447                 }
 448         }
 449 }
 450
 451
 452 Interface::Interface(
 453         Config &config,
 454         const Keymap &keymap,
 455         PlayerController &pc,
 456         ClientController &cc)
 457 : config(config)
 458 , keymap(keymap)
 459 , player_ctrl(pc)
 460 , client_ctrl(cc)
 461 , fwd(0)
 462 , rev(0)
 463 , slot(0)
 464 , num_slots(10) {
 465
 466 }
 467
 468
 469 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 470         if (!config.input.keyboard) return;
 471
 472         Keymap::Action action = keymap.Lookup(event);
 473         switch (action) {
 474                 case Keymap::MOVE_FORWARD:
 475                         rev.z = 1;
 476                         UpdateMovement();
 477                         break;
 478                 case Keymap::MOVE_BACKWARD:
 479                         fwd.z = 1;
 480                         UpdateMovement();
 481                         break;
 482                 case Keymap::MOVE_LEFT:
 483                         rev.x = 1;
 484                         UpdateMovement();
 485                         break;
 486                 case Keymap::MOVE_RIGHT:
 487                         fwd.x = 1;
 488                         UpdateMovement();
 489                         break;
 490                 case Keymap::MOVE_UP:
 491                         fwd.y = 1;
 492                         UpdateMovement();
 493                         break;
 494                 case Keymap::MOVE_DOWN:
 495                         rev.y = 1;
 496                         UpdateMovement();
 497                         break;
 498
 499                 case Keymap::PRIMARY:
 500                         player_ctrl.StartPrimaryAction();
 501                         break;
 502                 case Keymap::SECONDARY:
 503                         player_ctrl.StartSecondaryAction();
 504                         break;
 505                 case Keymap::TERTIARY:
 506                         player_ctrl.StartTertiaryAction();
 507                         break;
 508
 509                 case Keymap::INV_NEXT:
 510                         InvRel(1);
 511                         break;
 512                 case Keymap::INV_PREVIOUS:
 513                         InvRel(-1);
 514                         break;
 515                 case Keymap::INV_1:
 516                 case Keymap::INV_2:
 517                 case Keymap::INV_3:
 518                 case Keymap::INV_4:
 519                 case Keymap::INV_5:
 520                 case Keymap::INV_6:
 521                 case Keymap::INV_7:
 522                 case Keymap::INV_8:
 523                 case Keymap::INV_9:
 524                 case Keymap::INV_10:
 525                         InvAbs(action - Keymap::INV_1);
 526                         break;
 527
 528                 case Keymap::EXIT:
 529                         client_ctrl.Exit();
 530                         break;
 531
 532                 case Keymap::TOGGLE_AUDIO:
 533                         config.audio.enabled = !config.audio.enabled;
 534                         client_ctrl.SetAudio(config.audio.enabled);
 535                         break;
 536                 case Keymap::TOGGLE_VIDEO:
 537                         config.video.world = !config.video.world;
 538                         client_ctrl.SetVideo(config.video.world);
 539                         break;
 540                 case Keymap::TOGGLE_HUD:
 541                         config.video.hud = !config.video.hud;
 542                         client_ctrl.SetHUD(config.video.hud);
 543                         break;
 544                 case Keymap::TOGGLE_DEBUG:
 545                         config.video.debug = !config.video.debug;
 546                         client_ctrl.SetDebug(config.video.debug);
 547                         break;
 548
 549                 default:
 550                         break;
 551         }
 552 }
 553
 554 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 555         if (!config.input.keyboard) return;
 556
 557         switch (keymap.Lookup(event)) {
 558                 case Keymap::MOVE_FORWARD:
 559                         rev.z = 0;
 560                         UpdateMovement();
 561                         break;
 562                 case Keymap::MOVE_BACKWARD:
 563                         fwd.z = 0;
 564                         UpdateMovement();
 565                         break;
 566                 case Keymap::MOVE_LEFT:
 567                         rev.x = 0;
 568                         UpdateMovement();
 569                         break;
 570                 case Keymap::MOVE_RIGHT:
 571                         fwd.x = 0;
 572                         UpdateMovement();
 573                         break;
 574                 case Keymap::MOVE_UP:
 575                         fwd.y = 0;
 576                         UpdateMovement();
 577                         break;
 578                 case Keymap::MOVE_DOWN:
 579                         rev.y = 0;
 580                         UpdateMovement();
 581                         break;
 582
 583                 case Keymap::PRIMARY:
 584                         player_ctrl.StopPrimaryAction();
 585                         break;
 586                 case Keymap::SECONDARY:
 587                         player_ctrl.StopSecondaryAction();
 588                         break;
 589                 case Keymap::TERTIARY:
 590                         player_ctrl.StopTertiaryAction();
 591                         break;
 592
 593                 default:
 594                         break;
 595         }
 596 }
 597
 598 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 599         if (!config.input.mouse) return;
 600         player_ctrl.TurnHead(
 601                 event.yrel * config.input.pitch_sensitivity,
 602                 event.xrel * config.input.yaw_sensitivity);
 603 }
 604
 605 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 606         if (!config.input.mouse) return;
 607
 608         switch (event.button) {
 609                 case SDL_BUTTON_LEFT:
 610                         player_ctrl.StartPrimaryAction();
 611                         break;
 612                 case SDL_BUTTON_RIGHT:
 613                         player_ctrl.StartSecondaryAction();
 614                         break;
 615                 case SDL_BUTTON_MIDDLE:
 616                         player_ctrl.StartTertiaryAction();
 617                         break;
 618         }
 619 }
 620
 621 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 622         if (!config.input.mouse) return;
 623
 624         switch (event.button) {
 625                 case SDL_BUTTON_LEFT:
 626                         player_ctrl.StopPrimaryAction();
 627                         break;
 628                 case SDL_BUTTON_RIGHT:
 629                         player_ctrl.StopSecondaryAction();
 630                         break;
 631                 case SDL_BUTTON_MIDDLE:
 632                         player_ctrl.StopTertiaryAction();
 633                         break;
 634         }
 635 }
 636
 637
 638 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 639         if (!config.input.mouse) return;
 640
 641         if (event.y < 0) {
 642                 InvRel(1);
 643         } else if (event.y > 0) {
 644                 InvRel(-1);
 645         }
 646 }
 647
 648 void Interface::UpdateMovement() {
 649         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 650 }
 651
 652 void Interface::InvAbs(int s) {
 653         slot = s % num_slots;
 654         while (slot < 0) {
 655                 slot += num_slots;
 656         }
 657         player_ctrl.SelectInventory(slot);
 658 }
 659
 660 void Interface::InvRel(int delta) {
 661         InvAbs(slot + delta);
 662 }
 663
 664
 665 Keymap::Keymap()
 666 : codemap{ NONE } {
 667
 668 }
 669
 670 void Keymap::Map(SDL_Scancode scancode, Action action) {
 671         if (scancode > MAX_SCANCODE) {
 672                 throw std::runtime_error("refusing to map scancode: too damn high");
 673         }
 674         codemap[scancode] = action;
 675 }
 676
 677 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 678         if (scancode < NUM_SCANCODES) {
 679                 return codemap[scancode];
 680         } else {
 681                 return NONE;
 682         }
 683 }
 684
 685
 686 void Keymap::LoadDefault() {
 687         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 688         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 689         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 690         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 691         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 692         Map(SDL_SCANCODE_A, MOVE_LEFT);
 693         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 694         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 695         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 696         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 697         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 698         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 699         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 700
 701         Map(SDL_SCANCODE_TAB, INV_NEXT);
 702         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 703         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 704         Map(SDL_SCANCODE_1, INV_1);
 705         Map(SDL_SCANCODE_2, INV_2);
 706         Map(SDL_SCANCODE_3, INV_3);
 707         Map(SDL_SCANCODE_4, INV_4);
 708         Map(SDL_SCANCODE_5, INV_5);
 709         Map(SDL_SCANCODE_6, INV_6);
 710         Map(SDL_SCANCODE_7, INV_7);
 711         Map(SDL_SCANCODE_8, INV_8);
 712         Map(SDL_SCANCODE_9, INV_9);
 713         Map(SDL_SCANCODE_0, INV_10);
 714
 715         Map(SDL_SCANCODE_INSERT, SECONDARY);
 716         Map(SDL_SCANCODE_RETURN, SECONDARY);
 717         Map(SDL_SCANCODE_MENU, TERTIARY);
 718         Map(SDL_SCANCODE_DELETE, PRIMARY);
 719         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 720
 721         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 722         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 723         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 724         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 725
 726         Map(SDL_SCANCODE_ESCAPE, EXIT);
 727 }
 728
 729
 730 void Keymap::Load(std::istream &is) {
 731         TokenStreamReader in(is);
 732         std::string key_name;
 733         std::string action_name;
 734         SDL_Scancode key;
 735         Action action;
 736         while (in.HasMore()) {
 737                 if (in.Peek().type == Token::STRING) {
 738                         in.ReadString(key_name);
 739                         key = SDL_GetScancodeFromName(key_name.c_str());
 740                 } else {
 741                         key = SDL_Scancode(in.GetInt());
 742                 }
 743                 in.Skip(Token::EQUALS);
 744                 in.ReadIdentifier(action_name);
 745                 action = StringToAction(action_name);
 746                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 747                         in.Skip(Token::SEMICOLON);
 748                 }
 749                 Map(key, action);
 750         }
 751 }
 752
 753 void Keymap::Save(std::ostream &out) {
 754         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 755                 if (codemap[i] == NONE) continue;
 756
 757                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 758                 if (str && *str) {
 759                         out << '"';
 760                         while (*str) {
 761                                 if (*str == '"') {
 762                                         out << "\\\"";
 763                                 } else {
 764                                         out << *str;
 765                                 }
 766                                 ++str;
 767                         }
 768                         out << '"';
 769                 } else {
 770                         out << i;
 771                 }
 772
 773                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 774         }
 775 }
 776
 777
 778 namespace {
 779
 780 std::map<std::string, Keymap::Action> action_map = {
 781         { "none", Keymap::NONE },
 782         { "move_forward", Keymap::MOVE_FORWARD },
 783         { "move_backward", Keymap::MOVE_BACKWARD },
 784         { "move_left", Keymap::MOVE_LEFT },
 785         { "move_right", Keymap::MOVE_RIGHT },
 786         { "move_up", Keymap::MOVE_UP },
 787         { "move_down", Keymap::MOVE_DOWN },
 788
 789         { "primary", Keymap::PRIMARY },
 790         { "secondary", Keymap::SECONDARY },
 791         { "tertiary", Keymap::TERTIARY },
 792
 793         { "inventory_next", Keymap::INV_NEXT },
 794         { "inventory_prev", Keymap::INV_PREVIOUS },
 795         { "inventory_1", Keymap::INV_1 },
 796         { "inventory_2", Keymap::INV_2 },
 797         { "inventory_3", Keymap::INV_3 },
 798         { "inventory_4", Keymap::INV_4 },
 799         { "inventory_5", Keymap::INV_5 },
 800         { "inventory_6", Keymap::INV_6 },
 801         { "inventory_7", Keymap::INV_7 },
 802         { "inventory_8", Keymap::INV_8 },
 803         { "inventory_9", Keymap::INV_9 },
 804         { "inventory_10", Keymap::INV_10 },
 805
 806         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 807         { "toggle_video", Keymap::TOGGLE_VIDEO },
 808         { "toggle_hud", Keymap::TOGGLE_HUD },
 809         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 810
 811         { "exit", Keymap::EXIT },
 812 };
 813
 814 }
 815
 816 const char *Keymap::ActionToString(Action action) {
 817         for (const auto &entry : action_map) {
 818                 if (action == entry.second) {
 819                         return entry.first.c_str();
 820                 }
 821         }
 822         return "none";
 823 }
 824
 825 Keymap::Action Keymap::StringToAction(const std::string &str) {
 826         auto entry = action_map.find(str);
 827         if (entry != action_map.end()) {
 828                 return entry->second;
 829         } else {
 830                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 831                 return NONE;
 832         }
 833 }
 834
 835 }