src/map/MapState.cpp

   1 /*
   2  * MapState.cpp
   3  *
   4  *  Created on: Sep 29, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "MapState.h"
   9
  10 #include "Map.h"
  11 #include "Tile.h"
  12 #include "Trigger.h"
  13 #include "../app/Application.h"
  14 #include "../app/Input.h"
  15
  16 #include <algorithm>
  17
  18 using app::Application;
  19 using app::Input;
  20 using geometry::Vector;
  21
  22 namespace map {
  23
  24 MapState::MapState(Map *map)
  25 : map(map)
  26 , controlled(0)
  27 , tempTarget(20, 20)
  28 , camera(100, 100, &tempTarget)
  29 , walkingSpeed(64)
  30 , nextDirection(-1)
  31 , afterLock(false)
  32 , skipLock(false)
  33 , debug(false) {
  34
  35 }
  36
  37
  38 void MapState::EnterState(Application &ctrl, SDL_Surface *screen) {
  39         camera.Resize(screen->w, screen->h);
  40         LoadMap(map);
  41 }
  42
  43 void MapState::ExitState(Application &ctrl, SDL_Surface *screen) {
  44
  45 }
  46
  47 void MapState::ResumeState(Application &ctrl, SDL_Surface *screen) {
  48         camera.Resize(screen->w, screen->h);
  49 }
  50
  51 void MapState::PauseState(Application &ctrl, SDL_Surface *screen) {
  52
  53 }
  54
  55 void MapState::Resize(int width, int height) {
  56         camera.Resize(width, height);
  57 }
  58
  59
  60 void MapState::HandleEvents(const Input &input) {
  61         if (!controlled) return;
  62
  63         if (input.IsDown(Input::PAD_UP)) {
  64                 nextDirection = Entity::ORIENTATION_NORTH;
  65         } else if (input.IsDown(Input::PAD_RIGHT)) {
  66                 nextDirection = Entity::ORIENTATION_EAST;
  67         } else if (input.IsDown(Input::PAD_DOWN)) {
  68                 nextDirection = Entity::ORIENTATION_SOUTH;
  69         } else if (input.IsDown(Input::PAD_LEFT)) {
  70                 nextDirection = Entity::ORIENTATION_WEST;
  71         } else {
  72                 nextDirection = -1;
  73         }
  74
  75         if (input.JustPressed(Input::DEBUG_1)) {
  76                 debug = !debug;
  77         }
  78 }
  79
  80 void MapState::UpdateWorld(float deltaT) {
  81         if (controlled && controlled->TileLock(map->Tileset()->Size())) {
  82                 OnTileLock();
  83         }
  84         for (std::vector<Entity *>::iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
  85                 (*i)->Update(deltaT);
  86         }
  87 }
  88
  89 void MapState::OnTileLock() {
  90         if (moveTimer.Running() && !moveTimer.JustHit()) return;
  91
  92         Vector<int> nowLock(controlled->Position());
  93         if (nowLock != lastLock) {
  94                 OnGridLock();
  95                 afterLock = true;
  96                 moveTimer.Clear();
  97         } else if (moveTimer.JustHit()) {
  98                 OnGridLock();
  99                 afterLock = true;
 100         }
 101
 102         // TODO: halt all activity if lock caused a state/map transition
 103
 104         if (nextDirection >= 0) {
 105                 bool blocked(CheckBlocking());
 106                 if (afterLock) {
 107                         OnMove(!blocked);
 108                         afterLock = false;
 109                 }
 110                 controlled->SetOrientation(Entity::Orientation(nextDirection));
 111                 if (!blocked) {
 112                         controlled->SetSpeed(walkingSpeed);
 113                         moveTimer.Clear();
 114                 } else {
 115                         controlled->SetSpeed(0.0f);
 116                         StopFollowers(*controlled);
 117                         if (!moveTimer.Running()) {
 118                                 int tileSize((controlled->GetOrientation() % 2) ? map->Tileset()->Width() : map->Tileset()->Height());
 119                                 moveTimer = PhysicsTimers().StartInterval(tileSize/walkingSpeed);
 120                         }
 121                 }
 122                 if (!controlled->AnimationRunning()) {
 123                         controlled->StartAnimation(*this);
 124                 }
 125         } else {
 126                 controlled->SetSpeed(0.0f);
 127                 StopFollowers(*controlled);
 128                 controlled->StopAnimation();
 129                 moveTimer.Clear();
 130         }
 131
 132         lastLock = nowLock;
 133 }
 134
 135 bool MapState::CheckBlocking() const {
 136         const Tile *tile(map->TileAt(controlled->Position()));
 137         if (!tile) {
 138                 return false;
 139         }
 140         Vector<int> nextPosition;
 141         switch (nextDirection) {
 142                 case Entity::ORIENTATION_NORTH:
 143                         if (tile->BlocksNorth()) {
 144                                 return true;
 145                         } else {
 146                                 nextPosition = Vector<int>(
 147                                                 controlled->Position().X(),
 148                                                 controlled->Position().Y() - map->Tileset()->Height());
 149                         }
 150                         break;
 151                 case Entity::ORIENTATION_EAST:
 152                         if (tile->BlocksEast()) {
 153                                 return true;
 154                         } else {
 155                                 nextPosition = Vector<int>(
 156                                                 controlled->Position().X() + map->Tileset()->Width(),
 157                                                 controlled->Position().Y());
 158                         }
 159                         break;
 160                 case Entity::ORIENTATION_SOUTH:
 161                         if (tile->BlocksSouth()) {
 162                                 return true;
 163                         } else {
 164                                 nextPosition = Vector<int>(
 165                                                 controlled->Position().X(),
 166                                                 controlled->Position().Y() + map->Tileset()->Height());
 167                         }
 168                         break;
 169                 case Entity::ORIENTATION_WEST:
 170                         if (tile->BlocksWest()) {
 171                                 return true;
 172                         } else {
 173                                 nextPosition = Vector<int>(
 174                                                 controlled->Position().X() - map->Tileset()->Width(),
 175                                                 controlled->Position().Y());
 176                         }
 177                         break;
 178                 default:
 179                         return false;
 180         }
 181         Vector<int> nextTileCoords(map->TileCoordinates(nextPosition));
 182         for (std::vector<Entity *>::const_iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
 183                 const Entity &e(**i);
 184                 if (map->TileCoordinates(e.Position()) == nextTileCoords && e.Blocking()) {
 185                         return true;
 186                 }
 187         }
 188         return false;
 189 }
 190
 191 void MapState::OnGridLock() {
 192         if (skipLock) {
 193                 skipLock = false;
 194         } else {
 195                 LockEntities();
 196                 CheckMonster();
 197                 CheckTrigger();
 198         }
 199 }
 200
 201 void MapState::LockEntities() {
 202         for (std::vector<Entity *>::iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
 203                 if (*i == controlled) {
 204                         // don't lock player
 205                         continue;
 206                 }
 207                 (*i)->Position().Lock(map->Tileset()->Size());
 208         }
 209 }
 210
 211 void MapState::CheckMonster() {
 212         Vector<int> coords(map->TileCoordinates(controlled->Position()));
 213         Vector<int> neighbor[4];
 214         neighbor[0] = Vector<int>(coords.X(), coords.Y() - 1); // N
 215         neighbor[1] = Vector<int>(coords.X() + 1, coords.Y()); // E
 216         neighbor[2] = Vector<int>(coords.X(), coords.Y() + 1); // S
 217         neighbor[3] = Vector<int>(coords.X() - 1, coords.Y()); // W
 218
 219         for (int i(0); i < 4; ++i) {
 220                 for (std::vector<Entity *>::iterator e(entities.begin()), end(entities.end()); e != end; ++e) {
 221                         if ((*e)->Hostile() && map->TileCoordinates((*e)->Position()) == neighbor[i]) {
 222                                 // TODO: check for turn advantage, see #26
 223                                 // TODO: remove entity, push battle state and transition and halt all other activity
 224                                 // needed information here:
 225                                 //  - battle background (from tile?)
 226                                 //  - monsters + layout (from entity)
 227                                 //  - battle resources (from global resources)
 228                         }
 229                 }
 230         }
 231 }
 232
 233 void MapState::CheckTrigger() {
 234         Trigger *trigger(map->TriggerAt(Vector<int>(controlled->Position())));
 235         if (trigger) {
 236                 // TODO: run trigger script
 237                 if (trigger->map) {
 238                         Transition(trigger->map, trigger->target);
 239                 }
 240         }
 241
 242 }
 243
 244 void MapState::OnMove(bool realMove) {
 245         // TODO: evaluate monster movements
 246         if (realMove) {
 247                 UpdateFollower(*controlled);
 248         } else {
 249                 StopFollowers(*controlled);
 250         }
 251 }
 252
 253 void MapState::UpdateFollower(Entity &e) {
 254         if (!e.Follower()) return;
 255
 256         Entity &f(*e.Follower());
 257         UpdateFollower(f);
 258
 259         Vector<int> coords(map->TileCoordinates(e.Position()));
 260         Vector<int> fCoords(map->TileCoordinates(f.Position()));
 261         Vector<int> direction(coords - fCoords);
 262
 263         if (direction.Y() < 0) {
 264                 f.SetOrientation(Entity::ORIENTATION_NORTH);
 265                 f.SetSpeed(walkingSpeed);
 266                 f.StartAnimation(*this);
 267         } else if (direction.X() > 0) {
 268                 f.SetOrientation(Entity::ORIENTATION_EAST);
 269                 f.SetSpeed(walkingSpeed);
 270                 f.StartAnimation(*this);
 271         } else if (direction.Y() > 0) {
 272                 f.SetOrientation(Entity::ORIENTATION_SOUTH);
 273                 f.SetSpeed(walkingSpeed);
 274                 f.StartAnimation(*this);
 275         } else if (direction.X() < 0) {
 276                 f.SetOrientation(Entity::ORIENTATION_WEST);
 277                 f.SetSpeed(walkingSpeed);
 278                 f.StartAnimation(*this);
 279         } else {
 280                 f.SetSpeed(0.0f);
 281                 f.StopAnimation();
 282         }
 283 }
 284
 285 void MapState::StopFollowers(Entity &e) {
 286         for (Entity *f(e.Follower()); f; f = f->Follower()) {
 287                 f->SetSpeed(0.0f);
 288                 f->StopAnimation();
 289         }
 290 }
 291
 292
 293 void MapState::Transition(Map *newMap, const Vector<int> &coordinates) {
 294         UnloadMap();
 295         Vector<int> position(coordinates * map->Tileset()->Size());
 296         for (Entity *e(controlled); e; e = e->Follower()) {
 297                 e->Position() = position;
 298                 e->SetOrientation(controlled->GetOrientation());
 299         }
 300         LoadMap(newMap);
 301         skipLock = true;
 302 }
 303
 304 void MapState::UnloadMap() {
 305         entities.clear();
 306 }
 307
 308 void MapState::LoadMap(Map *m) {
 309         map = m;
 310         entities.insert(entities.end(), m->EntitiesBegin(), m->EntitiesEnd());
 311         for (Entity *e(controlled); e; e = e->Follower()) {
 312                 entities.push_back(e);
 313         }
 314 }
 315
 316
 317 void MapState::Render(SDL_Surface *screen) {
 318         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 319
 320         Vector<int> offset(camera.CalculateOffset());
 321         map->Render(screen, offset);
 322
 323         if (debug) {
 324                 map->RenderDebug(screen, offset);
 325         }
 326
 327         std::sort(entities.begin(), entities.end(), ZCompare);
 328         for (std::vector<Entity *>::iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
 329                 (*i)->Render(screen, offset);
 330         }
 331 }
 332
 333
 334 bool MapState::ZCompare(const Entity *lhs, const Entity *rhs) {
 335         return lhs->Position().Y() < rhs->Position().Y();
 336 }
 337
 338 }