src/battle/BattleState.cpp

   1 #include "BattleState.h"
   2
   3 #include "PartyLayout.h"
   4 #include "states/SelectMoveAction.h"
   5 #include "states/PerformAttacks.h"
   6 #include "../app/Application.h"
   7 #include "../app/Input.h"
   8 #include "../common/GameState.h"
   9 #include "../common/Ikari.h"
  10 #include "../common/Inventory.h"
  11 #include "../common/Item.h"
  12 #include "../common/Spell.h"
  13 #include "../graphics/Frame.h"
  14 #include "../graphics/Sprite.h"
  15
  16 #include <algorithm>
  17 #include <cassert>
  18 #include <cstdlib>
  19 #include <stdexcept>
  20
  21 using app::Application;
  22 using app::Input;
  23 using common::Inventory;
  24 using common::Item;
  25 using common::Spell;
  26 using common::Stats;
  27 using geometry::Vector;
  28 using graphics::Menu;
  29
  30 using std::rand;
  31 using std::vector;
  32
  33 namespace battle {
  34
  35 void BattleState::AddMonster(const Monster &m) {
  36         if (monsters.size() >= monstersLayout->NumPositions()) {
  37                 throw std::overflow_error("too many monsters for layout");
  38         }
  39         monsters.push_back(m);
  40 }
  41
  42 void BattleState::AddHero(const Hero &h) {
  43         if (numHeroes >= 4 || numHeroes >= (int)heroesLayout->NumPositions()) {
  44                 throw std::overflow_error("too many heroes for layout");
  45         }
  46         heroes[numHeroes] = h;
  47         ++numHeroes;
  48 }
  49
  50 void BattleState::SetCapsule(const Capsule &c) {
  51         capsule = c;
  52 }
  53
  54 void BattleState::NextHero() {
  55         ++activeHero;
  56         while (activeHero < numHeroes && heroes[activeHero].Health() == 0) {
  57                 ++activeHero;
  58         }
  59 }
  60
  61 void BattleState::PreviousHero() {
  62         --activeHero;
  63         while (activeHero >= 0 && heroes[activeHero].Health() == 0) {
  64                 --activeHero;
  65         }
  66 }
  67
  68 void BattleState::SwapHeroes(int lhs, int rhs) {
  69         if (lhs < 0 || lhs >= numHeroes || rhs < 0 || rhs >= numHeroes || lhs == rhs) return;
  70         std::swap(heroes[lhs], heroes[rhs]);
  71 }
  72
  73
  74 void BattleState::OnResize(int w, int h) {
  75
  76 }
  77
  78
  79 void BattleState::OnEnterState(SDL_Surface *screen) {
  80         for (int i(0); i < 4; ++i) {
  81                 heroes[i].Position() = heroesLayout->CalculatePosition(i, background->w, background->h);
  82                 heroes[i].SpellMenu() = *res->spellMenuProperties;
  83                 heroes[i].UpdateSpellMenu();
  84                 heroes[i].IkariMenu() = *res->ikariMenuProperties;
  85                 heroes[i].UpdateIkariMenu(res);
  86                 heroTags[i] = HeroTag(this, i);
  87                 smallHeroTags[i] = SmallHeroTag(this, i);
  88         }
  89
  90         capsule.Position() = heroesLayout->CalculatePosition(4, background->w, background->h);
  91
  92         for (int i(0); i < int(monsters.size()); ++i) {
  93                 monsters[i].Position() = monstersLayout->CalculatePosition(i, background->w, background->h);
  94         }
  95
  96         int tagHeight(attackTypeMenu.Height());
  97         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
  98         int xOffset((Width() - 2 * tagWidth) / 2);
  99         heroTagPositions[0] = Vector<int>(xOffset, Height() - 2 * tagHeight);
 100         heroTagPositions[1] = Vector<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
 101         heroTagPositions[2] = Vector<int>(xOffset, Height() - tagHeight);
 102         heroTagPositions[3] = Vector<int>(xOffset + tagWidth, Height() - tagHeight);
 103
 104         tagHeight = res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2;
 105         tagWidth = res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2;
 106         xOffset = (Width() - 4 * tagWidth) / 2;
 107         int yOffset(Height() - tagHeight);
 108         smallHeroTagPositions[0] = Vector<int>(xOffset, yOffset);
 109         smallHeroTagPositions[1] = Vector<int>(xOffset + 2 * tagWidth, yOffset);
 110         smallHeroTagPositions[2] = Vector<int>(xOffset + tagWidth, yOffset);
 111         smallHeroTagPositions[3] = Vector<int>(xOffset + 3 * tagWidth, yOffset);
 112
 113         itemMenu = *res->itemMenuProperties;
 114         LoadInventory();
 115         ClearAllAttacks();
 116 }
 117
 118 void BattleState::LoadInventory() {
 119         const Inventory &inv(game->state->inventory);
 120         itemMenu.Clear();
 121         itemMenu.Reserve(inv.MaxItems());
 122         for (int i(0); i < inv.MaxItems(); ++i) {
 123                 const Item *item(inv.ItemAt(i));
 124                 if (item) {
 125                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 126                 } else {
 127                         itemMenu.AddEmptyEntry();
 128                 }
 129         }
 130 }
 131
 132 void BattleState::OnExitState(SDL_Surface *screen) {
 133
 134 }
 135
 136 void BattleState::OnResumeState(SDL_Surface *screen) {
 137         if (ranAway) {
 138                 Ctrl().PopState(); // quit the battle scene
 139                 return;
 140         }
 141         if (Victory()) {
 142                 Ctrl().PopState();
 143                 return;
 144         }
 145         if (Defeat()) {
 146                 Ctrl().PopState();
 147                 return;
 148         }
 149         // TODO: this should not push a state while quitting
 150         if (AttackSelectionDone()) {
 151                 Ctrl().PushState(new PerformAttacks(this));
 152         } else {
 153                 Ctrl().PushState(new SelectMoveAction(this));
 154         }
 155 }
 156
 157 bool BattleState::Victory() const {
 158         for (int i(0); i < MaxMonsters(); ++i) {
 159                 if (MonsterAt(i).Health() > 0) return false;
 160         }
 161         return true;
 162 }
 163
 164 bool BattleState::Defeat() const {
 165         for (int i(0); i < NumHeroes(); ++i) {
 166                 if (HeroAt(i).Health() > 0) return false;
 167         }
 168         return true;
 169 }
 170
 171 void BattleState::OnPauseState(SDL_Surface *screen) {
 172
 173 }
 174
 175
 176 class OrderCompare {
 177         public:
 178                 OrderCompare(BattleState *battle) : battle(battle) { }
 179                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 180                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 181                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 182                         return lagl > ragl;
 183                 }
 184         private:
 185                 BattleState *battle;
 186 };
 187
 188 void BattleState::CalculateAttackOrder() {
 189         attackOrder.reserve(monsters.size() + NumHeroes());
 190         for (int i(0); i < NumHeroes(); ++i) {
 191                 attackOrder.push_back(Order(i, false));
 192         }
 193         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 194                 attackOrder.push_back(Order(i, true));
 195                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 196         }
 197         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 198 }
 199
 200 void BattleState::NextAttack() {
 201         if (Victory() || Defeat()) {
 202                 attackCursor = attackOrder.size();
 203                 return;
 204         }
 205         ++attackCursor;
 206         while (attackCursor < int(attackOrder.size())) {
 207                 if (attackOrder[attackCursor].isMonster) {
 208                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 209                 } else {
 210                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 211                 }
 212                 ++attackCursor;
 213         }
 214 }
 215
 216 bool BattleState::AttacksFinished() const {
 217         return attackCursor >= int(attackOrder.size())
 218                         || Victory() || Defeat();
 219 }
 220
 221 void BattleState::CalculateDamage() {
 222         if (CurrentAttack().isMonster) {
 223                 DecideMonsterAttack(MonsterAt(CurrentAttack().index));
 224         }
 225         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 226         if (ac.GetType() == AttackChoice::DEFEND) return;
 227         TargetSelection &ts(ac.Selection());
 228
 229         if (CurrentAttack().isMonster) {
 230                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 231                 CalculateDamage(attackerStats, ts);
 232         } else {
 233                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 234                 CalculateDamage(attackerStats, ts);
 235         }
 236 }
 237
 238 void BattleState::DecideMonsterAttack(Monster &m) const {
 239         AttackChoice &ac(m.GetAttackChoice());
 240         TargetSelection &ts(ac.Selection());
 241         ac.Reset();
 242         int target(rand() % NumHeroes());
 243         while (!HeroPositionOccupied(target)) {
 244                 target = rand() % NumHeroes();
 245         }
 246         ac.SetType(AttackChoice::SWORD);
 247         ts.SelectHeroes();
 248         ts.SetSingle();
 249         ts.Select(target);
 250 }
 251
 252 void BattleState::CalculateDamage(const Stats &attackerStats, TargetSelection &ts) const {
 253         bool hitSome(false);
 254         if (ts.TargetsMonsters()) {
 255                 for (int i(0); i < MaxMonsters(); ++i) {
 256                         if (ts.IsSelected(i)) {
 257                                 if (MonsterAt(i).Health() > 0) {
 258                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 259                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 260                                         ts.SetBad(i, damage);
 261                                         hitSome = true;
 262                                 } else {
 263                                         ts.Unselect(i);
 264                                 }
 265                         }
 266                 }
 267                 if (hitSome) return;
 268                 for (int i(0); i < MaxMonsters(); ++i) {
 269                         if (MonsterAt(i).Health() > 0) {
 270                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 271                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 272                                 ts.SetBad(i, damage);
 273                                 break;
 274                         }
 275                 }
 276         } else {
 277                 for (int i(0); i < NumHeroes(); ++i) {
 278                         if (ts.IsSelected(i)) {
 279                                 if (HeroAt(i).Health() > 0) {
 280                                         const Stats &defenderStats(HeroAt(i).GetStats());
 281                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 282                                         ts.SetBad(i, damage);
 283                                         hitSome = true;
 284                                 } else {
 285                                         ts.Unselect(i);
 286                                 }
 287                         }
 288                 }
 289                 if (hitSome) return;
 290                 for (int i(0); i < NumHeroes(); ++i) {
 291                         if (HeroAt(i).Health() > 0) {
 292                                 const Stats &defenderStats(HeroAt(i).GetStats());
 293                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 294                                 ts.SetBad(i, damage);
 295                                 break;
 296                         }
 297                 }
 298         }
 299 }
 300
 301 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 302         return attacker.Attack() / 2 - defender.Defense() / 4;
 303 }
 304
 305 void BattleState::ApplyDamage() {
 306         if (attackCursor < 0) return;
 307         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 308         TargetSelection &ts(ac.Selection());
 309         if (ts.TargetsMonsters()) {
 310                 for (int i(0); i < MaxMonsters(); ++i) {
 311                         Monster &monster(MonsterAt(i));
 312                         if (ts.IsBad(i)) {
 313                                 monster.SubtractHealth(ts.GetAmount(i));
 314                                 if (monster.Health() == 0) {
 315                                         expReward += monster.ExpReward();
 316                                         goldReward += monster.GoldReward();
 317                                 }
 318                         }
 319                 }
 320         } else {
 321                 for (int i(0); i < NumHeroes(); ++i) {
 322                         Hero &hero(HeroAt(i));
 323                         if (ts.IsBad(i)) {
 324                                 hero.SubtractHealth(ts.GetAmount(i));
 325                         }
 326                 }
 327         }
 328 }
 329
 330 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 331         if (CurrentAttack().isMonster) {
 332                 return MonsterAt(CurrentAttack().index).GetAttackChoice();
 333         } else {
 334                 return HeroAt(CurrentAttack().index).GetAttackChoice();
 335         }
 336 }
 337
 338 void BattleState::ClearAllAttacks() {
 339         attackCursor = -1;
 340         activeHero = -1;
 341         for (int i(0); i < NumHeroes(); ++i) {
 342                 HeroAt(i).GetAttackChoice() = AttackChoice(this);
 343         }
 344         for (int i(0); i < MaxMonsters(); ++i) {
 345                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 346         }
 347         attackOrder.clear();
 348 }
 349
 350
 351 void BattleState::HandleEvents(const Input &input) {
 352
 353 }
 354
 355 void BattleState::UpdateWorld(float deltaT) {
 356
 357 }
 358
 359 void BattleState::Render(SDL_Surface *screen) {
 360         assert(screen);
 361         Vector<int> offset(CalculateScreenOffset(screen));
 362         RenderBackground(screen, offset);
 363         RenderMonsters(screen, offset);
 364 }
 365
 366 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 367         assert(screen);
 368         // black for now
 369         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 370         SDL_Rect destRect;
 371         destRect.x = offset.X();
 372         destRect.y = offset.Y();
 373         destRect.w = background->w;
 374         destRect.h = background->h;
 375         SDL_BlitSurface(background, 0, screen, &destRect);
 376 }
 377
 378 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 379         assert(screen);
 380         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 381                 if (MonsterPositionOccupied(i)) {
 382                         if (monsters[i].GetAnimation().Running()) {
 383                                 monsters[i].GetAnimation().DrawCenter(screen, monsters[i].Position() + offset);
 384                         } else {
 385                                 monsters[i].Sprite()->DrawCenter(screen, monsters[i].Position() + offset);
 386                         }
 387                 }
 388         }
 389 }
 390
 391 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 392         assert(screen);
 393         for (int i(0); i < numHeroes; ++i) {
 394                 if (heroes[i].GetAnimation().Running()) {
 395                         heroes[i].GetAnimation().DrawCenter(screen, heroes[i].Position() + offset);
 396                 } else {
 397                         int row(heroes[i].Health() > 0 ? 0 : 2);
 398                         heroes[i].Sprite()->DrawCenter(screen, heroes[i].Position() + offset, 1, row);
 399                 }
 400         }
 401 }
 402
 403 void BattleState::RenderCapsule(SDL_Surface *screen, const Vector<int> &offset) {
 404         if (capsule.Health() <= 0) return;
 405         if (capsule.GetAnimation().Running()) {
 406                 capsule.GetAnimation().DrawCenter(screen, capsule.Position() + offset);
 407         } else {
 408                 capsule.Sprite()->DrawCenter(screen, capsule.Position() + offset);
 409         }
 410 }
 411
 412 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 413         assert(screen);
 414         int tagHeight(attackTypeMenu.Height());
 415         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 416
 417         for (int i(0); i < numHeroes; ++i) {
 418                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 419         }
 420 }
 421
 422 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 423         assert(screen);
 424         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 425         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 426
 427         SDL_Rect rect;
 428         rect.x = offset.X();
 429         rect.y = offset.Y() + Height() - tagHeight;
 430         rect.w = Width();
 431         rect.h = tagHeight;
 432         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 433         rect.y += res->normalFont->CharHeight() / 8;
 434         rect.h -= res->normalFont->CharHeight() / 4;
 435         SDL_FillRect(screen, &rect, res->heroesBgColor.MapRGB(screen->format));
 436
 437         for (int i(0); i < numHeroes; ++i) {
 438                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 439         }
 440 }
 441
 442 }