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                 const Tile &tile(map->TileAt(controlled->Position()));
  98                 bool blocked(false);
  99                 switch (nextDirection) {
 100                         case Entity::ORIENTATION_NORTH:
 101                                 blocked = tile.BlocksNorth();
 102                                 break;
 103                         case Entity::ORIENTATION_EAST:
 104                                 blocked = tile.BlocksEast();
 105                                 break;
 106                         case Entity::ORIENTATION_SOUTH:
 107                                 blocked = tile.BlocksSouth();
 108                                 break;
 109                         case Entity::ORIENTATION_WEST:
 110                                 blocked = tile.BlocksWest();
 111                                 break;
 112                 }
 113                 if (afterLock) {
 114                         OnMove(!blocked);
 115                         afterLock = false;
 116                 }
 117                 controlled->SetOrientation(Entity::Orientation(nextDirection));
 118                 if (!blocked) {
 119                         controlled->SetSpeed(walkingSpeed);
 120                         moveTimer.Clear();
 121                 } else {
 122                         controlled->SetSpeed(0.0f);
 123                         StopFollowers(*controlled);
 124                         if (!moveTimer.Running()) {
 125                                 int tileSize((controlled->GetOrientation() % 2) ? map->Tileset()->Width() : map->Tileset()->Height());
 126                                 moveTimer = PhysicsTimers().StartInterval(tileSize/walkingSpeed);
 127                         }
 128                 }
 129                 if (!controlled->AnimationRunning()) {
 130                         controlled->StartAnimation(*this);
 131                 }
 132         } else {
 133                 controlled->SetSpeed(0.0f);
 134                 StopFollowers(*controlled);
 135                 controlled->StopAnimation();
 136                 moveTimer.Clear();
 137         }
 138
 139         lastLock = nowLock;
 140 }
 141
 142 void MapState::OnGridLock() {
 143         LockEntities();
 144         Trigger *trigger(map->TriggerAt(Vector<int>(controlled->Position())));
 145         if (trigger) {
 146                 // TODO: run trigger
 147         }
 148         // TODO: check for adjacent monsters
 149         // TODO: force all entities into their grid positions?
 150 }
 151
 152 void MapState::LockEntities() {
 153         for (std::vector<Entity *>::iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
 154                 if (*i == controlled) {
 155                         // don't lock player
 156                         continue;
 157                 }
 158                 (*i)->Position().Lock(map->Tileset()->Size());
 159         }
 160 }
 161
 162 void MapState::OnMove(bool realMove) {
 163         // TODO: evaluate monster movements
 164         if (realMove) {
 165                 UpdateFollower(*controlled);
 166         } else {
 167                 StopFollowers(*controlled);
 168         }
 169 }
 170
 171 void MapState::UpdateFollower(Entity &e) {
 172         if (!e.Follower()) return;
 173
 174         Entity &f(*e.Follower());
 175         UpdateFollower(f);
 176
 177         Vector<int> coords(map->TileCoordinates(e.Position()));
 178         Vector<int> fCoords(map->TileCoordinates(f.Position()));
 179         Vector<int> direction(coords - fCoords);
 180
 181         if (direction.Y() < 0) {
 182                 f.SetOrientation(Entity::ORIENTATION_NORTH);
 183                 f.SetSpeed(walkingSpeed);
 184                 f.StartAnimation(*this);
 185         } else if (direction.X() > 0) {
 186                 f.SetOrientation(Entity::ORIENTATION_EAST);
 187                 f.SetSpeed(walkingSpeed);
 188                 f.StartAnimation(*this);
 189         } else if (direction.Y() > 0) {
 190                 f.SetOrientation(Entity::ORIENTATION_SOUTH);
 191                 f.SetSpeed(walkingSpeed);
 192                 f.StartAnimation(*this);
 193         } else if (direction.X() < 0) {
 194                 f.SetOrientation(Entity::ORIENTATION_WEST);
 195                 f.SetSpeed(walkingSpeed);
 196                 f.StartAnimation(*this);
 197         } else {
 198                 f.SetSpeed(0.0f);
 199                 f.StopAnimation();
 200         }
 201 }
 202
 203 void MapState::StopFollowers(Entity &e) {
 204         for (Entity *f(e.Follower()); f; f = f->Follower()) {
 205                 f->SetSpeed(0.0f);
 206                 f->StopAnimation();
 207         }
 208 }
 209
 210
 211 void MapState::Render(SDL_Surface *screen) {
 212         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 213
 214         Vector<int> offset(camera.CalculateOffset());
 215         map->Render(screen, offset);
 216
 217         std::sort(entities.begin(), entities.end(), ZCompare);
 218         for (std::vector<Entity *>::iterator i(entities.begin()), end(entities.end()); i != end; ++i) {
 219                 (*i)->Render(screen, offset);
 220         }
 221 }
 222
 223
 224 bool MapState::ZCompare(const Entity *lhs, const Entity *rhs) {
 225         return lhs->Position().Y() < rhs->Position().Y();
 226 }
 227
 228 }