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 "../graphics/Font.hpp"
  16 #include "../graphics/Viewport.hpp"
  17 #include "../io/TokenStreamReader.hpp"
  18 #include "../model/shapes.hpp"
  19 #include "../world/BlockLookup.hpp"
  20 #include "../world/World.hpp"
  21 #include "../world/WorldManipulator.hpp"
  22
  23 #include <algorithm>
  24 #include <cmath>
  25 #include <iostream>
  26 #include <map>
  27 #include <sstream>
  28 #include <glm/gtc/matrix_transform.hpp>
  29 #include <glm/gtx/rotate_vector.hpp>
  30 #include <glm/gtx/io.hpp>
  31
  32
  33 namespace blank {
  34
  35 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
  36 : world(world)
  37 , player(player)
  38 , manip(manip)
  39 , aim_world()
  40 , aim_entity()
  41 , move_dir(0.0f)
  42 , pitch(0.0f)
  43 , yaw(0.0f)
  44 , dirty(true)
  45 , place_timer(256)
  46 , remove_timer(256) {
  47
  48 }
  49
  50 void DirectInput::Update(int dt) {
  51         dirty = true; // world has changed in the meantime
  52         UpdatePlayer();
  53
  54         remove_timer.Update(dt);
  55         if (remove_timer.Hit()) {
  56                 RemoveBlock();
  57         }
  58
  59         place_timer.Update(dt);
  60         if (place_timer.Hit()) {
  61                 PlaceBlock();
  62         }
  63 }
  64
  65 void DirectInput::SetMovement(const glm::vec3 &m) {
  66         if (dot(m, m) > 1.0f) {
  67                 move_dir = normalize(m);
  68         } else {
  69                 move_dir = m;
  70         }
  71         dirty = true;
  72 }
  73
  74 void DirectInput::TurnHead(float dp, float dy) {
  75         pitch += dp;
  76         if (pitch > PI / 2) {
  77                 pitch = PI / 2;
  78         } else if (pitch < -PI / 2) {
  79                 pitch = -PI / 2;
  80         }
  81         yaw += dy;
  82         if (yaw > PI) {
  83                 yaw -= PI * 2;
  84         } else if (yaw < -PI) {
  85                 yaw += PI * 2;
  86         }
  87         dirty = true;
  88 }
  89
  90 void DirectInput::StartPrimaryAction() {
  91         if (!remove_timer.Running()) {
  92                 RemoveBlock();
  93                 remove_timer.Start();
  94         }
  95 }
  96
  97 void DirectInput::StopPrimaryAction() {
  98         remove_timer.Stop();
  99 }
 100
 101 void DirectInput::StartSecondaryAction() {
 102         if (!place_timer.Running()) {
 103                 PlaceBlock();
 104                 place_timer.Start();
 105         }
 106 }
 107
 108 void DirectInput::StopSecondaryAction() {
 109         place_timer.Stop();
 110 }
 111
 112 void DirectInput::StartTertiaryAction() {
 113         PickBlock();
 114 }
 115
 116 void DirectInput::StopTertiaryAction() {
 117         // nothing
 118 }
 119
 120 void DirectInput::SelectInventory(int i) {
 121         player.SetInventorySlot(i);
 122 }
 123
 124 void DirectInput::UpdatePlayer() {
 125         constexpr float max_vel = 0.005f;
 126         if (dirty) {
 127                 player.GetEntity().Orientation(glm::quat(glm::vec3(pitch, yaw, 0.0f)));
 128                 player.GetEntity().Velocity(glm::rotateY(move_dir * max_vel, yaw));
 129
 130                 Ray aim = player.Aim();
 131                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
 132                         aim_world = WorldCollision();
 133                 }
 134                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
 135                         aim_entity = EntityCollision();
 136                 }
 137                 if (aim_world && aim_entity) {
 138                         // got both, pick the closest one
 139                         if (aim_world.depth < aim_entity.depth) {
 140                                 aim_entity = EntityCollision();
 141                         } else {
 142                                 aim_world = WorldCollision();
 143                         }
 144                 }
 145                 // TODO: update outline if applicable
 146                 dirty = false;
 147         }
 148 }
 149
 150 void DirectInput::PickBlock() {
 151         UpdatePlayer();
 152         if (!aim_world) return;
 153         player.SetInventorySlot(aim_world.GetBlock().type - 1);
 154 }
 155
 156 void DirectInput::PlaceBlock() {
 157         UpdatePlayer();
 158         if (!aim_world) return;
 159
 160         BlockLookup next_block(aim_world.chunk, aim_world.BlockPos(), Block::NormalFace(aim_world.normal));
 161         if (!next_block) {
 162                 return;
 163         }
 164         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(player.GetInventorySlot() + 1));
 165         dirty = true;
 166 }
 167
 168 void DirectInput::RemoveBlock() {
 169         UpdatePlayer();
 170         if (!aim_world) return;
 171         manip.SetBlock(aim_world.GetChunk(), aim_world.block, Block(0));
 172         dirty = true;
 173 }
 174
 175
 176 HUD::HUD(Environment &env, Config &config, const Player &player)
 177 : env(env)
 178 , config(config)
 179 , player(player)
 180 // block focus
 181 , outline()
 182 , outline_transform(1.0f)
 183 , outline_visible(false)
 184 // "inventory"
 185 , block()
 186 , block_buf()
 187 , block_transform(1.0f)
 188 , block_label()
 189 , block_visible(false)
 190 // debug overlay
 191 , counter_text()
 192 , position_text()
 193 , orientation_text()
 194 , block_text()
 195 , show_block(false)
 196 , show_entity(false)
 197 // message box
 198 , messages(env.assets.small_ui_font)
 199 , msg_timer(5000)
 200 // crosshair
 201 , crosshair() {
 202         // "inventory"
 203         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 204         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 205         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 206         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 207         block_label.Position(
 208                 glm::vec3(50.0f, 85.0f, 0.0f),
 209                 Gravity::NORTH_WEST,
 210                 Gravity::NORTH
 211         );
 212         block_label.Foreground(glm::vec4(1.0f));
 213         block_label.Background(glm::vec4(0.5f));
 214
 215         // debug overlay
 216         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 217         counter_text.Foreground(glm::vec4(1.0f));
 218         counter_text.Background(glm::vec4(0.5f));
 219         position_text.Position(glm::vec3(-25.0f, 25.0f + env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 220         position_text.Foreground(glm::vec4(1.0f));
 221         position_text.Background(glm::vec4(0.5f));
 222         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 223         orientation_text.Foreground(glm::vec4(1.0f));
 224         orientation_text.Background(glm::vec4(0.5f));
 225         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 226         block_text.Foreground(glm::vec4(1.0f));
 227         block_text.Background(glm::vec4(0.5f));
 228         block_text.Set(env.assets.small_ui_font, "Block: none");
 229         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * env.assets.small_ui_font.LineSkip(), 0.0f), Gravity::NORTH_EAST);
 230         entity_text.Foreground(glm::vec4(1.0f));
 231         entity_text.Background(glm::vec4(0.5f));
 232         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 233
 234         // message box
 235         messages.Position(glm::vec3(25.0f, -25.0f, 0.0f), Gravity::SOUTH_WEST);
 236         messages.Foreground(glm::vec4(1.0f));
 237         messages.Background(glm::vec4(0.5f));
 238
 239         // crosshair
 240         OutlineModel::Buffer buf;
 241         buf.vertices = std::vector<glm::vec3>({
 242                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 243                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 244         });
 245         buf.indices = std::vector<OutlineModel::Index>({
 246                 0, 1, 2, 3
 247         });
 248         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f });
 249         crosshair.Update(buf);
 250 }
 251
 252 namespace {
 253
 254 OutlineModel::Buffer outl_buf;
 255
 256 }
 257
 258 void HUD::FocusBlock(const Chunk &chunk, int index) {
 259         const Block &block = chunk.BlockAt(index);
 260         const BlockType &type = chunk.Type(index);
 261         outl_buf.Clear();
 262         type.FillOutlineModel(outl_buf);
 263         outline.Update(outl_buf);
 264         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 265         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 266         outline_transform *= glm::scale(glm::vec3(1.005f));
 267         outline_visible = true;
 268         {
 269                 std::stringstream s;
 270                 s << "Block: "
 271                         << type.label
 272                         << ", face: " << block.GetFace()
 273                         << ", turn: " << block.GetTurn();
 274                 block_text.Set(env.assets.small_ui_font, s.str());
 275         }
 276         show_block = true;
 277         show_entity = false;
 278 }
 279
 280 void HUD::FocusEntity(const Entity &entity) {
 281         {
 282                 std::stringstream s;
 283                 s << "Entity: " << entity.Name();
 284                 entity_text.Set(env.assets.small_ui_font, s.str());
 285         }
 286         show_block = false;
 287         show_entity = true;
 288 }
 289
 290 void HUD::FocusNone() {
 291         outline_visible = false;
 292         show_block = false;
 293         show_entity = false;
 294 }
 295
 296 void HUD::DisplayNone() {
 297         block_visible = false;
 298 }
 299
 300 void HUD::Display(const BlockType &type) {
 301         block_buf.Clear();
 302         type.FillEntityModel(block_buf);
 303         block.Update(block_buf);
 304
 305         block_label.Set(env.assets.small_ui_font, type.label);
 306
 307         block_visible = type.visible;
 308 }
 309
 310
 311 void HUD::UpdateDebug() {
 312         UpdateCounter();
 313         UpdatePosition();
 314         UpdateOrientation();
 315 }
 316
 317 void HUD::UpdateCounter() {
 318         std::stringstream s;
 319         s << std::setprecision(3) <<
 320                 "avg: " << env.counter.Average().running << "ms, "
 321                 "peak: " << env.counter.Peak().running << "ms";
 322         std::string text = s.str();
 323         counter_text.Set(env.assets.small_ui_font, text);
 324 }
 325
 326 void HUD::UpdatePosition() {
 327         std::stringstream s;
 328         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 329         position_text.Set(env.assets.small_ui_font, s.str());
 330 }
 331
 332 void HUD::UpdateOrientation() {
 333         //std::stringstream s;
 334         //s << std::setprecision(3) << "pitch: " << rad2deg(ctrl.Pitch())
 335         //      << ", yaw: " << rad2deg(ctrl.Yaw());
 336         //orientation_text.Set(env.assets.small_ui_font, s.str());
 337 }
 338
 339 void HUD::PostMessage(const char *msg) {
 340         messages.PushLine(msg);
 341         msg_timer.Reset();
 342         msg_timer.Start();
 343         std::cout << msg << std::endl;
 344 }
 345
 346
 347 void HUD::Update(int dt) {
 348         msg_timer.Update(dt);
 349         if (msg_timer.HitOnce()) {
 350                 msg_timer.Stop();
 351         }
 352
 353         if (config.video.debug) {
 354                 if (env.counter.Changed()) {
 355                         UpdateCounter();
 356                 }
 357                 UpdatePosition();
 358                 UpdateOrientation();
 359         }
 360 }
 361
 362 void HUD::Render(Viewport &viewport) noexcept {
 363         // block focus
 364         if (outline_visible && config.video.world) {
 365                 PlainColor &outline_prog = viewport.WorldOutlineProgram();
 366                 outline_prog.SetM(outline_transform);
 367                 outline.Draw();
 368         }
 369
 370         // clear depth buffer so everything renders above the world
 371         viewport.ClearDepth();
 372
 373         if (config.video.hud) {
 374                 // "inventory"
 375                 if (block_visible) {
 376                         DirectionalLighting &world_prog = viewport.HUDProgram();
 377                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 378                         // disable distance fog
 379                         world_prog.SetFogDensity(0.0f);
 380
 381                         viewport.DisableBlending();
 382                         world_prog.SetM(block_transform);
 383                         block.Draw();
 384                         block_label.Render(viewport);
 385                 }
 386
 387                 // message box
 388                 if (msg_timer.Running()) {
 389                         messages.Render(viewport);
 390                 }
 391
 392                 // crosshair
 393                 PlainColor &outline_prog = viewport.HUDOutlineProgram();
 394                 viewport.EnableInvertBlending();
 395                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 396                 outline_prog.SetM(viewport.Cursor());
 397                 crosshair.Draw();
 398         }
 399
 400         // debug overlay
 401         if (config.video.debug) {
 402                 counter_text.Render(viewport);
 403                 position_text.Render(viewport);
 404                 orientation_text.Render(viewport);
 405                 if (show_block) {
 406                         block_text.Render(viewport);
 407                 } else if (show_entity) {
 408                         entity_text.Render(viewport);
 409                 }
 410         }
 411 }
 412
 413
 414 InteractiveManipulator::InteractiveManipulator(Environment &env, Entity &player)
 415 : player(player)
 416 , audio(env.audio)
 417 , place_sound(env.loader.LoadSound("thump"))
 418 , remove_sound(env.loader.LoadSound("plop")) {
 419
 420 }
 421
 422 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 423         chunk.SetBlock(index, block);
 424         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 425         // TODO: get sound effect from block type
 426         if (block.type == 0) {
 427                 audio.Play(remove_sound, coords);
 428         } else {
 429                 audio.Play(place_sound, coords);
 430         }
 431 }
 432
 433
 434 Interface::Interface(
 435         Config &config,
 436         const Keymap &keymap,
 437         PlayerController &pc,
 438         ClientController &cc)
 439 : config(config)
 440 , keymap(keymap)
 441 , player_ctrl(pc)
 442 , client_ctrl(cc)
 443 , fwd(0)
 444 , rev(0)
 445 , slot(0)
 446 , num_slots(10) {
 447
 448 }
 449
 450
 451 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 452         if (!config.input.keyboard) return;
 453
 454         Keymap::Action action = keymap.Lookup(event);
 455         switch (action) {
 456                 case Keymap::MOVE_FORWARD:
 457                         rev.z = 1;
 458                         UpdateMovement();
 459                         break;
 460                 case Keymap::MOVE_BACKWARD:
 461                         fwd.z = 1;
 462                         UpdateMovement();
 463                         break;
 464                 case Keymap::MOVE_LEFT:
 465                         rev.x = 1;
 466                         UpdateMovement();
 467                         break;
 468                 case Keymap::MOVE_RIGHT:
 469                         fwd.x = 1;
 470                         UpdateMovement();
 471                         break;
 472                 case Keymap::MOVE_UP:
 473                         fwd.y = 1;
 474                         UpdateMovement();
 475                         break;
 476                 case Keymap::MOVE_DOWN:
 477                         rev.y = 1;
 478                         UpdateMovement();
 479                         break;
 480
 481                 case Keymap::PRIMARY:
 482                         player_ctrl.StartPrimaryAction();
 483                         break;
 484                 case Keymap::SECONDARY:
 485                         player_ctrl.StartSecondaryAction();
 486                         break;
 487                 case Keymap::TERTIARY:
 488                         player_ctrl.StartTertiaryAction();
 489                         break;
 490
 491                 case Keymap::INV_NEXT:
 492                         InvRel(1);
 493                         break;
 494                 case Keymap::INV_PREVIOUS:
 495                         InvRel(-1);
 496                         break;
 497                 case Keymap::INV_1:
 498                 case Keymap::INV_2:
 499                 case Keymap::INV_3:
 500                 case Keymap::INV_4:
 501                 case Keymap::INV_5:
 502                 case Keymap::INV_6:
 503                 case Keymap::INV_7:
 504                 case Keymap::INV_8:
 505                 case Keymap::INV_9:
 506                 case Keymap::INV_10:
 507                         InvAbs(action - Keymap::INV_1);
 508                         break;
 509
 510                 case Keymap::EXIT:
 511                         client_ctrl.Exit();
 512                         break;
 513
 514                 case Keymap::TOGGLE_AUDIO:
 515                         config.audio.enabled = !config.audio.enabled;
 516                         client_ctrl.SetAudio(config.audio.enabled);
 517                         break;
 518                 case Keymap::TOGGLE_VIDEO:
 519                         config.video.world = !config.video.world;
 520                         client_ctrl.SetVideo(config.video.world);
 521                         break;
 522                 case Keymap::TOGGLE_HUD:
 523                         config.video.hud = !config.video.hud;
 524                         client_ctrl.SetHUD(config.video.hud);
 525                         break;
 526                 case Keymap::TOGGLE_DEBUG:
 527                         config.video.debug = !config.video.debug;
 528                         client_ctrl.SetDebug(config.video.debug);
 529                         break;
 530
 531                 default:
 532                         break;
 533         }
 534 }
 535
 536 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 537         if (!config.input.keyboard) return;
 538
 539         switch (keymap.Lookup(event)) {
 540                 case Keymap::MOVE_FORWARD:
 541                         rev.z = 0;
 542                         UpdateMovement();
 543                         break;
 544                 case Keymap::MOVE_BACKWARD:
 545                         fwd.z = 0;
 546                         UpdateMovement();
 547                         break;
 548                 case Keymap::MOVE_LEFT:
 549                         rev.x = 0;
 550                         UpdateMovement();
 551                         break;
 552                 case Keymap::MOVE_RIGHT:
 553                         fwd.x = 0;
 554                         UpdateMovement();
 555                         break;
 556                 case Keymap::MOVE_UP:
 557                         fwd.y = 0;
 558                         UpdateMovement();
 559                         break;
 560                 case Keymap::MOVE_DOWN:
 561                         rev.y = 0;
 562                         UpdateMovement();
 563                         break;
 564
 565                 case Keymap::PRIMARY:
 566                         player_ctrl.StopPrimaryAction();
 567                         break;
 568                 case Keymap::SECONDARY:
 569                         player_ctrl.StopSecondaryAction();
 570                         break;
 571                 case Keymap::TERTIARY:
 572                         player_ctrl.StopTertiaryAction();
 573                         break;
 574
 575                 default:
 576                         break;
 577         }
 578 }
 579
 580 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 581         if (!config.input.mouse) return;
 582         player_ctrl.TurnHead(
 583                 event.yrel * config.input.pitch_sensitivity,
 584                 event.xrel * config.input.yaw_sensitivity);
 585 }
 586
 587 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 588         if (!config.input.mouse) return;
 589
 590         switch (event.button) {
 591                 case SDL_BUTTON_LEFT:
 592                         player_ctrl.StartPrimaryAction();
 593                         break;
 594                 case SDL_BUTTON_RIGHT:
 595                         player_ctrl.StartSecondaryAction();
 596                         break;
 597                 case SDL_BUTTON_MIDDLE:
 598                         player_ctrl.StartTertiaryAction();
 599                         break;
 600         }
 601 }
 602
 603 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 604         if (!config.input.mouse) return;
 605
 606         switch (event.button) {
 607                 case SDL_BUTTON_LEFT:
 608                         player_ctrl.StopPrimaryAction();
 609                         break;
 610                 case SDL_BUTTON_RIGHT:
 611                         player_ctrl.StopSecondaryAction();
 612                         break;
 613                 case SDL_BUTTON_MIDDLE:
 614                         player_ctrl.StopTertiaryAction();
 615                         break;
 616         }
 617 }
 618
 619
 620 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 621         if (!config.input.mouse) return;
 622
 623         if (event.y < 0) {
 624                 InvRel(1);
 625         } else if (event.y > 0) {
 626                 InvRel(-1);
 627         }
 628 }
 629
 630 void Interface::UpdateMovement() {
 631         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 632 }
 633
 634 void Interface::InvAbs(int s) {
 635         slot = s % num_slots;
 636         while (slot < 0) {
 637                 slot += num_slots;
 638         }
 639         player_ctrl.SelectInventory(slot);
 640 }
 641
 642 void Interface::InvRel(int delta) {
 643         InvAbs(slot + delta);
 644 }
 645
 646
 647 Keymap::Keymap()
 648 : codemap{ NONE } {
 649
 650 }
 651
 652 void Keymap::Map(SDL_Scancode scancode, Action action) {
 653         if (scancode > MAX_SCANCODE) {
 654                 throw std::runtime_error("refusing to map scancode: too damn high");
 655         }
 656         codemap[scancode] = action;
 657 }
 658
 659 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 660         if (scancode < NUM_SCANCODES) {
 661                 return codemap[scancode];
 662         } else {
 663                 return NONE;
 664         }
 665 }
 666
 667
 668 void Keymap::LoadDefault() {
 669         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 670         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 671         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 672         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 673         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 674         Map(SDL_SCANCODE_A, MOVE_LEFT);
 675         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 676         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 677         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 678         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 679         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 680         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 681         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 682
 683         Map(SDL_SCANCODE_TAB, INV_NEXT);
 684         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 685         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 686         Map(SDL_SCANCODE_1, INV_1);
 687         Map(SDL_SCANCODE_2, INV_2);
 688         Map(SDL_SCANCODE_3, INV_3);
 689         Map(SDL_SCANCODE_4, INV_4);
 690         Map(SDL_SCANCODE_5, INV_5);
 691         Map(SDL_SCANCODE_6, INV_6);
 692         Map(SDL_SCANCODE_7, INV_7);
 693         Map(SDL_SCANCODE_8, INV_8);
 694         Map(SDL_SCANCODE_9, INV_9);
 695         Map(SDL_SCANCODE_0, INV_10);
 696
 697         Map(SDL_SCANCODE_INSERT, SECONDARY);
 698         Map(SDL_SCANCODE_RETURN, SECONDARY);
 699         Map(SDL_SCANCODE_MENU, TERTIARY);
 700         Map(SDL_SCANCODE_DELETE, PRIMARY);
 701         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 702
 703         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 704         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 705         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 706         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 707
 708         Map(SDL_SCANCODE_ESCAPE, EXIT);
 709 }
 710
 711
 712 void Keymap::Load(std::istream &is) {
 713         TokenStreamReader in(is);
 714         std::string key_name;
 715         std::string action_name;
 716         SDL_Scancode key;
 717         Action action;
 718         while (in.HasMore()) {
 719                 if (in.Peek().type == Token::STRING) {
 720                         in.ReadString(key_name);
 721                         key = SDL_GetScancodeFromName(key_name.c_str());
 722                 } else {
 723                         key = SDL_Scancode(in.GetInt());
 724                 }
 725                 in.Skip(Token::EQUALS);
 726                 in.ReadIdentifier(action_name);
 727                 action = StringToAction(action_name);
 728                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 729                         in.Skip(Token::SEMICOLON);
 730                 }
 731                 Map(key, action);
 732         }
 733 }
 734
 735 void Keymap::Save(std::ostream &out) {
 736         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 737                 if (codemap[i] == NONE) continue;
 738
 739                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 740                 if (str && *str) {
 741                         out << '"';
 742                         while (*str) {
 743                                 if (*str == '"') {
 744                                         out << "\\\"";
 745                                 } else {
 746                                         out << *str;
 747                                 }
 748                                 ++str;
 749                         }
 750                         out << '"';
 751                 } else {
 752                         out << i;
 753                 }
 754
 755                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 756         }
 757 }
 758
 759
 760 namespace {
 761
 762 std::map<std::string, Keymap::Action> action_map = {
 763         { "none", Keymap::NONE },
 764         { "move_forward", Keymap::MOVE_FORWARD },
 765         { "move_backward", Keymap::MOVE_BACKWARD },
 766         { "move_left", Keymap::MOVE_LEFT },
 767         { "move_right", Keymap::MOVE_RIGHT },
 768         { "move_up", Keymap::MOVE_UP },
 769         { "move_down", Keymap::MOVE_DOWN },
 770
 771         { "primary", Keymap::PRIMARY },
 772         { "secondary", Keymap::SECONDARY },
 773         { "tertiary", Keymap::TERTIARY },
 774
 775         { "inventory_next", Keymap::INV_NEXT },
 776         { "inventory_prev", Keymap::INV_PREVIOUS },
 777         { "inventory_1", Keymap::INV_1 },
 778         { "inventory_2", Keymap::INV_2 },
 779         { "inventory_3", Keymap::INV_3 },
 780         { "inventory_4", Keymap::INV_4 },
 781         { "inventory_5", Keymap::INV_5 },
 782         { "inventory_6", Keymap::INV_6 },
 783         { "inventory_7", Keymap::INV_7 },
 784         { "inventory_8", Keymap::INV_8 },
 785         { "inventory_9", Keymap::INV_9 },
 786         { "inventory_10", Keymap::INV_10 },
 787
 788         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 789         { "toggle_video", Keymap::TOGGLE_VIDEO },
 790         { "toggle_hud", Keymap::TOGGLE_HUD },
 791         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 792
 793         { "exit", Keymap::EXIT },
 794 };
 795
 796 }
 797
 798 const char *Keymap::ActionToString(Action action) {
 799         for (const auto &entry : action_map) {
 800                 if (action == entry.second) {
 801                         return entry.first.c_str();
 802                 }
 803         }
 804         return "none";
 805 }
 806
 807 Keymap::Action Keymap::StringToAction(const std::string &str) {
 808         auto entry = action_map.find(str);
 809         if (entry != action_map.end()) {
 810                 return entry->second;
 811         } else {
 812                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 813                 return NONE;
 814         }
 815 }
 816
 817 }