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 "../net/CongestionControl.hpp"
  21 #include "../world/BlockLookup.hpp"
  22 #include "../world/World.hpp"
  23 #include "../world/WorldManipulator.hpp"
  24
  25 #include <algorithm>
  26 #include <cmath>
  27 #include <iostream>
  28 #include <map>
  29 #include <sstream>
  30 #include <glm/gtc/matrix_transform.hpp>
  31 #include <glm/gtx/rotate_vector.hpp>
  32 #include <glm/gtx/io.hpp>
  33
  34
  35 namespace blank {
  36
  37 PlayerController::PlayerController(World &world, Player &player)
  38 : world(world)
  39 , player(player)
  40 , move_dir(0.0f)
  41 , dirty(true)
  42 , aim_world()
  43 , aim_entity() {
  44         player.GetEntity().SetController(*this);
  45 }
  46
  47 PlayerController::~PlayerController() {
  48         if (&player.GetEntity().GetController() == this) {
  49                 player.GetEntity().UnsetController();
  50         }
  51 }
  52
  53 void PlayerController::SetMovement(const glm::vec3 &m) noexcept {
  54         if (dot(m, m) > 1.0f) {
  55                 move_dir = normalize(m);
  56         } else {
  57                 move_dir = m;
  58         }
  59         Invalidate();
  60 }
  61
  62 glm::vec3 PlayerController::ControlForce(const Entity &e, const EntityState &s) const {
  63         return TargetVelocity(rotateY(move_dir * e.MaxVelocity(), s.yaw), s, 5.0f);
  64 }
  65
  66 void PlayerController::TurnHead(float dp, float dy) noexcept {
  67         player.GetEntity().TurnHead(dp, dy);
  68 }
  69
  70 float PlayerController::GetPitch() const noexcept {
  71         return player.GetEntity().Pitch();
  72 }
  73
  74 float PlayerController::GetYaw() const noexcept {
  75         return player.GetEntity().Yaw();
  76 }
  77
  78 void PlayerController::SelectInventory(int i) noexcept {
  79         player.SetInventorySlot(i);
  80 }
  81
  82 int PlayerController::InventorySlot() const noexcept {
  83         return player.GetInventorySlot();
  84 }
  85
  86 void PlayerController::Invalidate() noexcept {
  87         dirty = true;
  88 }
  89
  90 void PlayerController::UpdatePlayer() noexcept {
  91         if (dirty) {
  92                 Ray aim = player.Aim();
  93                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity().ChunkCoords(), aim_world)) {
  94                         aim_world = WorldCollision();
  95                 }
  96                 if (!world.Intersection(aim, glm::mat4(1.0f), player.GetEntity(), aim_entity)) {
  97                         aim_entity = EntityCollision();
  98                 }
  99                 if (aim_world && aim_entity) {
 100                         // got both, pick the closest one
 101                         if (aim_world.depth < aim_entity.depth) {
 102                                 aim_entity = EntityCollision();
 103                         } else {
 104                                 aim_world = WorldCollision();
 105                         }
 106                 }
 107                 dirty = false;
 108         }
 109 }
 110
 111
 112 DirectInput::DirectInput(World &world, Player &player, WorldManipulator &manip)
 113 : PlayerController(world, player)
 114 , manip(manip)
 115 , place_timer(0.25f)
 116 , remove_timer(0.25f) {
 117
 118 }
 119
 120 void DirectInput::Update(Entity &, float dt) {
 121         Invalidate(); // world has changed in the meantime
 122         UpdatePlayer();
 123
 124         remove_timer.Update(dt);
 125         if (remove_timer.Hit()) {
 126                 RemoveBlock();
 127         }
 128
 129         place_timer.Update(dt);
 130         if (place_timer.Hit()) {
 131                 PlaceBlock();
 132         }
 133 }
 134
 135 void DirectInput::StartPrimaryAction() {
 136         if (!remove_timer.Running()) {
 137                 RemoveBlock();
 138                 remove_timer.Start();
 139         }
 140 }
 141
 142 void DirectInput::StopPrimaryAction() {
 143         remove_timer.Stop();
 144 }
 145
 146 void DirectInput::StartSecondaryAction() {
 147         if (!place_timer.Running()) {
 148                 PlaceBlock();
 149                 place_timer.Start();
 150         }
 151 }
 152
 153 void DirectInput::StopSecondaryAction() {
 154         place_timer.Stop();
 155 }
 156
 157 void DirectInput::StartTertiaryAction() {
 158         PickBlock();
 159 }
 160
 161 void DirectInput::StopTertiaryAction() {
 162         // nothing
 163 }
 164
 165 void DirectInput::PickBlock() {
 166         UpdatePlayer();
 167         if (!BlockFocus()) return;
 168         SelectInventory(BlockFocus().GetBlock().type - 1);
 169 }
 170
 171 void DirectInput::PlaceBlock() {
 172         UpdatePlayer();
 173         if (!BlockFocus()) return;
 174
 175         BlockLookup next_block(BlockFocus().chunk, BlockFocus().BlockPos(), Block::NormalFace(BlockFocus().normal));
 176         if (!next_block) {
 177                 return;
 178         }
 179         manip.SetBlock(next_block.GetChunk(), next_block.GetBlockIndex(), Block(InventorySlot() + 1));
 180         Invalidate();
 181 }
 182
 183 void DirectInput::RemoveBlock() {
 184         UpdatePlayer();
 185         if (!BlockFocus()) return;
 186         manip.SetBlock(BlockFocus().GetChunk(), BlockFocus().block, Block(0));
 187         Invalidate();
 188 }
 189
 190
 191 HUD::HUD(Environment &env, Config &config, const Player &player)
 192 : env(env)
 193 , config(config)
 194 , player(player)
 195 // block focus
 196 , outline()
 197 , outline_transform(1.0f)
 198 , outline_visible(false)
 199 // "inventory"
 200 , block()
 201 , block_buf()
 202 , block_transform(1.0f)
 203 , block_label()
 204 , block_visible(false)
 205 // debug overlay
 206 , counter_text()
 207 , position_text()
 208 , orientation_text()
 209 , block_text()
 210 , show_block(false)
 211 , show_entity(false)
 212 // net stats
 213 , bandwidth_text()
 214 , rtt_text()
 215 , packet_loss_text()
 216 , show_net(false)
 217 // message box
 218 , messages(env.assets.small_ui_font)
 219 , msg_timer(5000)
 220 , msg_keep(false)
 221 // crosshair
 222 , crosshair() {
 223         const float ls = env.assets.small_ui_font.LineSkip();
 224
 225         // "inventory"
 226         block_transform = glm::translate(block_transform, glm::vec3(50.0f, 50.0f, 0.0f));
 227         block_transform = glm::scale(block_transform, glm::vec3(50.0f));
 228         block_transform = glm::rotate(block_transform, 3.5f, glm::vec3(1.0f, 0.0f, 0.0f));
 229         block_transform = glm::rotate(block_transform, 0.35f, glm::vec3(0.0f, 1.0f, 0.0f));
 230         block_label.Position(
 231                 glm::vec3(50.0f, 85.0f, 0.0f),
 232                 Gravity::NORTH_WEST,
 233                 Gravity::NORTH
 234         );
 235         block_label.Foreground(glm::vec4(1.0f));
 236         block_label.Background(glm::vec4(0.5f));
 237
 238         // debug overlay
 239         counter_text.Position(glm::vec3(-25.0f, 25.0f, 0.0f), Gravity::NORTH_EAST);
 240         counter_text.Foreground(glm::vec4(1.0f));
 241         counter_text.Background(glm::vec4(0.5f));
 242         position_text.Position(glm::vec3(-25.0f, 25.0f + ls, 0.0f), Gravity::NORTH_EAST);
 243         position_text.Foreground(glm::vec4(1.0f));
 244         position_text.Background(glm::vec4(0.5f));
 245         orientation_text.Position(glm::vec3(-25.0f, 25.0f + 2 * ls, 0.0f), Gravity::NORTH_EAST);
 246         orientation_text.Foreground(glm::vec4(1.0f));
 247         orientation_text.Background(glm::vec4(0.5f));
 248         block_text.Position(glm::vec3(-25.0f, 25.0f + 4 * ls, 0.0f), Gravity::NORTH_EAST);
 249         block_text.Foreground(glm::vec4(1.0f));
 250         block_text.Background(glm::vec4(0.5f));
 251         block_text.Set(env.assets.small_ui_font, "Block: none");
 252         entity_text.Position(glm::vec3(-25.0f, 25.0f + 4 * ls, 0.0f), Gravity::NORTH_EAST);
 253         entity_text.Foreground(glm::vec4(1.0f));
 254         entity_text.Background(glm::vec4(0.5f));
 255         entity_text.Set(env.assets.small_ui_font, "Entity: none");
 256
 257         // net stats
 258         bandwidth_text.Position(glm::vec3(-25.0f, 25.0f + 6 * ls, 0.0f), Gravity::NORTH_EAST);
 259         bandwidth_text.Foreground(glm::vec4(1.0f));
 260         bandwidth_text.Background(glm::vec4(0.5f));
 261         bandwidth_text.Set(env.assets.small_ui_font, "TX: 0.0KB/s RX: 0.0KB/s");
 262         rtt_text.Position(glm::vec3(-25.0f, 25.0f + 7 * ls, 0.0f), Gravity::NORTH_EAST);
 263         rtt_text.Foreground(glm::vec4(1.0f));
 264         rtt_text.Background(glm::vec4(0.5f));
 265         rtt_text.Set(env.assets.small_ui_font, "RTT: unavailable");
 266         packet_loss_text.Position(glm::vec3(-25.0f, 25.0f + 8 * ls, 0.0f), Gravity::NORTH_EAST);
 267         packet_loss_text.Foreground(glm::vec4(1.0f));
 268         packet_loss_text.Background(glm::vec4(0.5f));
 269         packet_loss_text.Set(env.assets.small_ui_font, "Packet loss: 0.0%");
 270
 271         // message box
 272         messages.Position(glm::vec3(25.0f, -25.0f - 2 * ls, 0.0f), Gravity::SOUTH_WEST);
 273         messages.Foreground(glm::vec4(1.0f));
 274         messages.Background(glm::vec4(0.5f));
 275
 276         // crosshair
 277         PrimitiveMesh::Buffer buf;
 278         buf.vertices = std::vector<glm::vec3>({
 279                 { -10.0f,   0.0f, 0.0f }, { 10.0f,  0.0f, 0.0f },
 280                 {   0.0f, -10.0f, 0.0f }, {  0.0f, 10.0f, 0.0f },
 281         });
 282         buf.indices = std::vector<PrimitiveMesh::Index>({
 283                 0, 1, 2, 3
 284         });
 285         buf.colors.resize(4, { 10.0f, 10.0f, 10.0f, 1.0f });
 286         crosshair.Update(buf);
 287 }
 288
 289 namespace {
 290
 291 PrimitiveMesh::Buffer outl_buf;
 292
 293 }
 294
 295 void HUD::FocusBlock(const Chunk &chunk, int index) {
 296         const Block &block = chunk.BlockAt(index);
 297         const BlockType &type = chunk.Type(index);
 298         outl_buf.Clear();
 299         type.OutlinePrimitiveMesh(outl_buf);
 300         outline.Update(outl_buf);
 301         outline_transform = chunk.Transform(player.GetEntity().ChunkCoords());
 302         outline_transform *= chunk.ToTransform(Chunk::ToPos(index), index);
 303         outline_transform *= glm::scale(glm::vec3(1.005f));
 304         outline_visible = true;
 305         {
 306                 std::stringstream s;
 307                 s << "Block: "
 308                         << type.label
 309                         << ", face: " << block.GetFace()
 310                         << ", turn: " << block.GetTurn();
 311                 block_text.Set(env.assets.small_ui_font, s.str());
 312         }
 313         show_block = true;
 314         show_entity = false;
 315 }
 316
 317 void HUD::FocusEntity(const Entity &entity) {
 318         {
 319                 std::stringstream s;
 320                 s << "Entity: " << entity.Name();
 321                 entity_text.Set(env.assets.small_ui_font, s.str());
 322         }
 323         show_block = false;
 324         show_entity = true;
 325 }
 326
 327 void HUD::FocusNone() {
 328         outline_visible = false;
 329         show_block = false;
 330         show_entity = false;
 331 }
 332
 333 void HUD::DisplayNone() {
 334         block_visible = false;
 335 }
 336
 337 void HUD::Display(const BlockType &type) {
 338         block_buf.Clear();
 339         type.FillEntityMesh(block_buf);
 340         block.Update(block_buf);
 341
 342         block_label.Set(env.assets.small_ui_font, type.label);
 343
 344         block_visible = type.visible;
 345 }
 346
 347
 348 void HUD::UpdateDebug() {
 349         UpdateCounter();
 350         UpdatePosition();
 351         UpdateOrientation();
 352 }
 353
 354 void HUD::UpdateCounter() {
 355         std::stringstream s;
 356         s << std::setprecision(3) <<
 357                 "avg: " << env.counter.Average().running << "ms, "
 358                 "peak: " << env.counter.Peak().running << "ms";
 359         std::string text = s.str();
 360         counter_text.Set(env.assets.small_ui_font, text);
 361 }
 362
 363 void HUD::UpdatePosition() {
 364         std::stringstream s;
 365         s << std::setprecision(3) << "pos: " << player.GetEntity().AbsolutePosition();
 366         position_text.Set(env.assets.small_ui_font, s.str());
 367 }
 368
 369 void HUD::UpdateOrientation() {
 370         std::stringstream s;
 371         s << std::setprecision(3) << "pitch: " << rad2deg(player.GetEntity().Pitch())
 372                 << ", yaw: " << rad2deg(player.GetEntity().Yaw());
 373         orientation_text.Set(env.assets.small_ui_font, s.str());
 374 }
 375
 376 void HUD::PostMessage(const char *msg) {
 377         messages.PushLine(msg);
 378         msg_timer.Reset();
 379         msg_timer.Start();
 380         std::cout << msg << std::endl;
 381 }
 382
 383
 384 void HUD::UpdateNetStats(const CongestionControl &stat) {
 385         if (!config.video.debug) return;
 386
 387         std::stringstream s;
 388         s << std::fixed << std::setprecision(1)
 389                 << "TX: " << stat.Upstream()
 390                 << "KB/s, RX: " << stat.Downstream() << "KB/s";
 391         bandwidth_text.Set(env.assets.small_ui_font, s.str());
 392
 393         s.str("");
 394         s << "RTT: " << stat.RoundTripTime() << "ms";
 395         rtt_text.Set(env.assets.small_ui_font, s.str());
 396
 397         s.str("");
 398         s << "Packet loss: " << (stat.PacketLoss() * 100.0f) << "%";
 399         packet_loss_text.Set(env.assets.small_ui_font, s.str());
 400
 401         show_net = true;
 402 }
 403
 404
 405 void HUD::Update(int dt) {
 406         msg_timer.Update(dt);
 407         if (msg_timer.HitOnce()) {
 408                 msg_timer.Stop();
 409         }
 410
 411         if (config.video.debug) {
 412                 if (env.counter.Changed()) {
 413                         UpdateCounter();
 414                 }
 415                 UpdatePosition();
 416                 UpdateOrientation();
 417         }
 418 }
 419
 420 void HUD::Render(Viewport &viewport) noexcept {
 421         // block focus
 422         if (outline_visible && config.video.world) {
 423                 PlainColor &outline_prog = viewport.WorldColorProgram();
 424                 outline_prog.SetM(outline_transform);
 425                 outline.DrawLines();
 426         }
 427
 428         // clear depth buffer so everything renders above the world
 429         viewport.ClearDepth();
 430
 431         if (config.video.hud) {
 432                 // "inventory"
 433                 if (block_visible) {
 434                         DirectionalLighting &world_prog = viewport.HUDProgram();
 435                         world_prog.SetLightDirection({ 1.0f, 3.0f, 5.0f });
 436                         // disable distance fog
 437                         world_prog.SetFogDensity(0.0f);
 438
 439                         viewport.DisableBlending();
 440                         world_prog.SetM(block_transform);
 441                         block.Draw();
 442                         block_label.Render(viewport);
 443                 }
 444
 445                 // message box
 446                 if (msg_keep || msg_timer.Running()) {
 447                         messages.Render(viewport);
 448                 }
 449
 450                 // crosshair
 451                 PlainColor &outline_prog = viewport.HUDColorProgram();
 452                 viewport.EnableInvertBlending();
 453                 viewport.SetCursor(glm::vec3(0.0f), Gravity::CENTER);
 454                 outline_prog.SetM(viewport.Cursor());
 455                 crosshair.DrawLines();
 456         }
 457
 458         // debug overlay
 459         if (config.video.debug) {
 460                 counter_text.Render(viewport);
 461                 position_text.Render(viewport);
 462                 orientation_text.Render(viewport);
 463                 if (show_block) {
 464                         block_text.Render(viewport);
 465                 } else if (show_entity) {
 466                         entity_text.Render(viewport);
 467                 }
 468                 if (show_net) {
 469                         bandwidth_text.Render(viewport);
 470                         rtt_text.Render(viewport);
 471                         packet_loss_text.Render(viewport);
 472                 }
 473         }
 474 }
 475
 476
 477 InteractiveManipulator::InteractiveManipulator(Audio &audio, const SoundBank &sounds, Entity &player)
 478 : player(player)
 479 , audio(audio)
 480 , sounds(sounds) {
 481
 482 }
 483
 484 void InteractiveManipulator::SetBlock(Chunk &chunk, int index, const Block &block) {
 485         const BlockType &old_type = chunk.Type(index);
 486         chunk.SetBlock(index, block);
 487         const BlockType &new_type = chunk.Type(index);
 488         glm::vec3 coords = chunk.ToSceneCoords(player.ChunkCoords(), Chunk::ToCoords(index));
 489         if (new_type.id == 0) {
 490                 if (old_type.remove_sound >= 0) {
 491                         audio.Play(sounds[old_type.remove_sound], coords);
 492                 }
 493         } else {
 494                 if (new_type.place_sound >= 0) {
 495                         audio.Play(sounds[new_type.place_sound], coords);
 496                 }
 497         }
 498 }
 499
 500
 501 Interface::Interface(
 502         Config &config,
 503         const Keymap &keymap,
 504         PlayerController &pc,
 505         ClientController &cc)
 506 : config(config)
 507 , keymap(keymap)
 508 , player_ctrl(pc)
 509 , client_ctrl(cc)
 510 , fwd(0)
 511 , rev(0)
 512 , slot(0)
 513 , num_slots(10)
 514 , locked(false) {
 515
 516 }
 517
 518 void Interface::Lock() {
 519         fwd = glm::ivec3(0);
 520         rev = glm::ivec3(0);
 521         locked = true;
 522 }
 523
 524 void Interface::Unlock() {
 525         locked = false;
 526 }
 527
 528 void Interface::HandlePress(const SDL_KeyboardEvent &event) {
 529         if (!config.input.keyboard) return;
 530
 531         Keymap::Action action = keymap.Lookup(event);
 532         switch (action) {
 533                 case Keymap::MOVE_FORWARD:
 534                         rev.z = 1;
 535                         UpdateMovement();
 536                         break;
 537                 case Keymap::MOVE_BACKWARD:
 538                         fwd.z = 1;
 539                         UpdateMovement();
 540                         break;
 541                 case Keymap::MOVE_LEFT:
 542                         rev.x = 1;
 543                         UpdateMovement();
 544                         break;
 545                 case Keymap::MOVE_RIGHT:
 546                         fwd.x = 1;
 547                         UpdateMovement();
 548                         break;
 549                 case Keymap::MOVE_UP:
 550                         fwd.y = 1;
 551                         UpdateMovement();
 552                         break;
 553                 case Keymap::MOVE_DOWN:
 554                         rev.y = 1;
 555                         UpdateMovement();
 556                         break;
 557
 558                 case Keymap::PRIMARY:
 559                         player_ctrl.StartPrimaryAction();
 560                         break;
 561                 case Keymap::SECONDARY:
 562                         player_ctrl.StartSecondaryAction();
 563                         break;
 564                 case Keymap::TERTIARY:
 565                         player_ctrl.StartTertiaryAction();
 566                         break;
 567
 568                 case Keymap::INV_NEXT:
 569                         InvRel(1);
 570                         break;
 571                 case Keymap::INV_PREVIOUS:
 572                         InvRel(-1);
 573                         break;
 574                 case Keymap::INV_1:
 575                 case Keymap::INV_2:
 576                 case Keymap::INV_3:
 577                 case Keymap::INV_4:
 578                 case Keymap::INV_5:
 579                 case Keymap::INV_6:
 580                 case Keymap::INV_7:
 581                 case Keymap::INV_8:
 582                 case Keymap::INV_9:
 583                 case Keymap::INV_10:
 584                         InvAbs(action - Keymap::INV_1);
 585                         break;
 586
 587                 case Keymap::EXIT:
 588                         client_ctrl.Exit();
 589                         break;
 590
 591                 case Keymap::TOGGLE_AUDIO:
 592                         config.audio.enabled = !config.audio.enabled;
 593                         client_ctrl.SetAudio(config.audio.enabled);
 594                         break;
 595                 case Keymap::TOGGLE_VIDEO:
 596                         config.video.world = !config.video.world;
 597                         client_ctrl.SetVideo(config.video.world);
 598                         break;
 599                 case Keymap::TOGGLE_HUD:
 600                         config.video.hud = !config.video.hud;
 601                         client_ctrl.SetHUD(config.video.hud);
 602                         break;
 603                 case Keymap::TOGGLE_DEBUG:
 604                         config.video.debug = !config.video.debug;
 605                         client_ctrl.SetDebug(config.video.debug);
 606                         break;
 607
 608                 default:
 609                         break;
 610         }
 611 }
 612
 613 void Interface::HandleRelease(const SDL_KeyboardEvent &event) {
 614         if (!config.input.keyboard) return;
 615
 616         switch (keymap.Lookup(event)) {
 617                 case Keymap::MOVE_FORWARD:
 618                         rev.z = 0;
 619                         UpdateMovement();
 620                         break;
 621                 case Keymap::MOVE_BACKWARD:
 622                         fwd.z = 0;
 623                         UpdateMovement();
 624                         break;
 625                 case Keymap::MOVE_LEFT:
 626                         rev.x = 0;
 627                         UpdateMovement();
 628                         break;
 629                 case Keymap::MOVE_RIGHT:
 630                         fwd.x = 0;
 631                         UpdateMovement();
 632                         break;
 633                 case Keymap::MOVE_UP:
 634                         fwd.y = 0;
 635                         UpdateMovement();
 636                         break;
 637                 case Keymap::MOVE_DOWN:
 638                         rev.y = 0;
 639                         UpdateMovement();
 640                         break;
 641
 642                 case Keymap::PRIMARY:
 643                         player_ctrl.StopPrimaryAction();
 644                         break;
 645                 case Keymap::SECONDARY:
 646                         player_ctrl.StopSecondaryAction();
 647                         break;
 648                 case Keymap::TERTIARY:
 649                         player_ctrl.StopTertiaryAction();
 650                         break;
 651
 652                 default:
 653                         break;
 654         }
 655 }
 656
 657 void Interface::Handle(const SDL_MouseMotionEvent &event) {
 658         if (locked || !config.input.mouse) return;
 659         player_ctrl.TurnHead(
 660                 event.yrel * config.input.pitch_sensitivity,
 661                 event.xrel * config.input.yaw_sensitivity);
 662 }
 663
 664 void Interface::HandlePress(const SDL_MouseButtonEvent &event) {
 665         if (!config.input.mouse) return;
 666
 667         switch (event.button) {
 668                 case SDL_BUTTON_LEFT:
 669                         player_ctrl.StartPrimaryAction();
 670                         break;
 671                 case SDL_BUTTON_RIGHT:
 672                         player_ctrl.StartSecondaryAction();
 673                         break;
 674                 case SDL_BUTTON_MIDDLE:
 675                         player_ctrl.StartTertiaryAction();
 676                         break;
 677         }
 678 }
 679
 680 void Interface::HandleRelease(const SDL_MouseButtonEvent &event) {
 681         if (!config.input.mouse) return;
 682
 683         switch (event.button) {
 684                 case SDL_BUTTON_LEFT:
 685                         player_ctrl.StopPrimaryAction();
 686                         break;
 687                 case SDL_BUTTON_RIGHT:
 688                         player_ctrl.StopSecondaryAction();
 689                         break;
 690                 case SDL_BUTTON_MIDDLE:
 691                         player_ctrl.StopTertiaryAction();
 692                         break;
 693         }
 694 }
 695
 696
 697 void Interface::Handle(const SDL_MouseWheelEvent &event) {
 698         if (!config.input.mouse) return;
 699
 700         if (event.y < 0) {
 701                 InvRel(1);
 702         } else if (event.y > 0) {
 703                 InvRel(-1);
 704         }
 705 }
 706
 707 void Interface::UpdateMovement() {
 708         player_ctrl.SetMovement(glm::vec3(fwd - rev));
 709 }
 710
 711 void Interface::InvAbs(int s) {
 712         slot = s % num_slots;
 713         while (slot < 0) {
 714                 slot += num_slots;
 715         }
 716         player_ctrl.SelectInventory(slot);
 717 }
 718
 719 void Interface::InvRel(int delta) {
 720         InvAbs(slot + delta);
 721 }
 722
 723
 724 Keymap::Keymap()
 725 : codemap{ NONE } {
 726
 727 }
 728
 729 void Keymap::Map(SDL_Scancode scancode, Action action) {
 730         if (scancode > MAX_SCANCODE) {
 731                 throw std::runtime_error("refusing to map scancode: too damn high");
 732         }
 733         codemap[scancode] = action;
 734 }
 735
 736 Keymap::Action Keymap::Lookup(SDL_Scancode scancode) const {
 737         if (scancode < NUM_SCANCODES) {
 738                 return codemap[scancode];
 739         } else {
 740                 return NONE;
 741         }
 742 }
 743
 744
 745 void Keymap::LoadDefault() {
 746         Map(SDL_SCANCODE_UP, MOVE_FORWARD);
 747         Map(SDL_SCANCODE_W, MOVE_FORWARD);
 748         Map(SDL_SCANCODE_DOWN, MOVE_BACKWARD);
 749         Map(SDL_SCANCODE_S, MOVE_BACKWARD);
 750         Map(SDL_SCANCODE_LEFT, MOVE_LEFT);
 751         Map(SDL_SCANCODE_A, MOVE_LEFT);
 752         Map(SDL_SCANCODE_RIGHT, MOVE_RIGHT);
 753         Map(SDL_SCANCODE_D, MOVE_RIGHT);
 754         Map(SDL_SCANCODE_SPACE, MOVE_UP);
 755         Map(SDL_SCANCODE_RSHIFT, MOVE_UP);
 756         Map(SDL_SCANCODE_LSHIFT, MOVE_DOWN);
 757         Map(SDL_SCANCODE_LCTRL, MOVE_DOWN);
 758         Map(SDL_SCANCODE_RCTRL, MOVE_DOWN);
 759
 760         Map(SDL_SCANCODE_TAB, INV_NEXT);
 761         Map(SDL_SCANCODE_RIGHTBRACKET, INV_NEXT);
 762         Map(SDL_SCANCODE_LEFTBRACKET, INV_PREVIOUS);
 763         Map(SDL_SCANCODE_1, INV_1);
 764         Map(SDL_SCANCODE_2, INV_2);
 765         Map(SDL_SCANCODE_3, INV_3);
 766         Map(SDL_SCANCODE_4, INV_4);
 767         Map(SDL_SCANCODE_5, INV_5);
 768         Map(SDL_SCANCODE_6, INV_6);
 769         Map(SDL_SCANCODE_7, INV_7);
 770         Map(SDL_SCANCODE_8, INV_8);
 771         Map(SDL_SCANCODE_9, INV_9);
 772         Map(SDL_SCANCODE_0, INV_10);
 773
 774         Map(SDL_SCANCODE_INSERT, SECONDARY);
 775         Map(SDL_SCANCODE_RETURN, SECONDARY);
 776         Map(SDL_SCANCODE_MENU, TERTIARY);
 777         Map(SDL_SCANCODE_DELETE, PRIMARY);
 778         Map(SDL_SCANCODE_BACKSPACE, PRIMARY);
 779
 780         Map(SDL_SCANCODE_F1, TOGGLE_HUD);
 781         Map(SDL_SCANCODE_F2, TOGGLE_VIDEO);
 782         Map(SDL_SCANCODE_F3, TOGGLE_DEBUG);
 783         Map(SDL_SCANCODE_F4, TOGGLE_AUDIO);
 784
 785         Map(SDL_SCANCODE_ESCAPE, EXIT);
 786 }
 787
 788
 789 void Keymap::Load(std::istream &is) {
 790         TokenStreamReader in(is);
 791         std::string key_name;
 792         std::string action_name;
 793         SDL_Scancode key;
 794         Action action;
 795         while (in.HasMore()) {
 796                 if (in.Peek().type == Token::STRING) {
 797                         in.ReadString(key_name);
 798                         key = SDL_GetScancodeFromName(key_name.c_str());
 799                 } else {
 800                         key = SDL_Scancode(in.GetInt());
 801                 }
 802                 in.Skip(Token::EQUALS);
 803                 in.ReadIdentifier(action_name);
 804                 action = StringToAction(action_name);
 805                 if (in.HasMore() && in.Peek().type == Token::SEMICOLON) {
 806                         in.Skip(Token::SEMICOLON);
 807                 }
 808                 Map(key, action);
 809         }
 810 }
 811
 812 void Keymap::Save(std::ostream &out) {
 813         for (unsigned int i = 0; i < NUM_SCANCODES; ++i) {
 814                 if (codemap[i] == NONE) continue;
 815
 816                 const char *str = SDL_GetScancodeName(SDL_Scancode(i));
 817                 if (str && *str) {
 818                         out << '"';
 819                         while (*str) {
 820                                 if (*str == '"') {
 821                                         out << "\\\"";
 822                                 } else {
 823                                         out << *str;
 824                                 }
 825                                 ++str;
 826                         }
 827                         out << '"';
 828                 } else {
 829                         out << i;
 830                 }
 831
 832                 out << " = " << ActionToString(codemap[i]) << std::endl;;
 833         }
 834 }
 835
 836
 837 namespace {
 838
 839 std::map<std::string, Keymap::Action> action_map = {
 840         { "none", Keymap::NONE },
 841         { "move_forward", Keymap::MOVE_FORWARD },
 842         { "move_backward", Keymap::MOVE_BACKWARD },
 843         { "move_left", Keymap::MOVE_LEFT },
 844         { "move_right", Keymap::MOVE_RIGHT },
 845         { "move_up", Keymap::MOVE_UP },
 846         { "move_down", Keymap::MOVE_DOWN },
 847
 848         { "primary", Keymap::PRIMARY },
 849         { "secondary", Keymap::SECONDARY },
 850         { "tertiary", Keymap::TERTIARY },
 851
 852         { "inventory_next", Keymap::INV_NEXT },
 853         { "inventory_prev", Keymap::INV_PREVIOUS },
 854         { "inventory_1", Keymap::INV_1 },
 855         { "inventory_2", Keymap::INV_2 },
 856         { "inventory_3", Keymap::INV_3 },
 857         { "inventory_4", Keymap::INV_4 },
 858         { "inventory_5", Keymap::INV_5 },
 859         { "inventory_6", Keymap::INV_6 },
 860         { "inventory_7", Keymap::INV_7 },
 861         { "inventory_8", Keymap::INV_8 },
 862         { "inventory_9", Keymap::INV_9 },
 863         { "inventory_10", Keymap::INV_10 },
 864
 865         { "toggle_audio", Keymap::TOGGLE_AUDIO },
 866         { "toggle_video", Keymap::TOGGLE_VIDEO },
 867         { "toggle_hud", Keymap::TOGGLE_HUD },
 868         { "toggle_debug", Keymap::TOGGLE_DEBUG },
 869
 870         { "exit", Keymap::EXIT },
 871 };
 872
 873 }
 874
 875 const char *Keymap::ActionToString(Action action) {
 876         for (const auto &entry : action_map) {
 877                 if (action == entry.second) {
 878                         return entry.first.c_str();
 879                 }
 880         }
 881         return "none";
 882 }
 883
 884 Keymap::Action Keymap::StringToAction(const std::string &str) {
 885         auto entry = action_map.find(str);
 886         if (entry != action_map.end()) {
 887                 return entry->second;
 888         } else {
 889                 std::cerr << "unknown action \"" << str << '"' << std::endl;
 890                 return NONE;
 891         }
 892 }
 893
 894 }