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