src/battle/BattleState.cpp

   1 /*
   2  * BattleState.cpp
   3  *
   4  *  Created on: Aug 5, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "BattleState.h"
   9
  10 #include "PartyLayout.h"
  11 #include "states/SelectMoveAction.h"
  12 #include "states/PerformAttacks.h"
  13 #include "../app/Application.h"
  14 #include "../app/Input.h"
  15 #include "../common/Ikari.h"
  16 #include "../common/Inventory.h"
  17 #include "../common/Item.h"
  18 #include "../common/Spell.h"
  19 #include "../geometry/operators.h"
  20 #include "../graphics/Frame.h"
  21 #include "../graphics/Sprite.h"
  22
  23 #include <algorithm>
  24 #include <cassert>
  25 #include <stdexcept>
  26
  27 using app::Application;
  28 using app::Input;
  29 using common::Inventory;
  30 using common::Item;
  31 using common::Spell;
  32 using geometry::Point;
  33 using geometry::Vector;
  34 using graphics::Menu;
  35
  36 using std::vector;
  37
  38 namespace battle {
  39
  40 void BattleState::AddMonster(const Monster &m) {
  41         if (monsters.size() >= monstersLayout->NumPositions()) {
  42                 throw std::overflow_error("too many monsters for layout");
  43         }
  44         monsters.push_back(m);
  45 }
  46
  47 void BattleState::AddHero(const Hero &h) {
  48         if (numHeroes >= 4 || numHeroes >= (int)heroesLayout->NumPositions()) {
  49                 throw std::overflow_error("too many heroes for layout");
  50         }
  51         heroes[numHeroes] = h;
  52         ++numHeroes;
  53 }
  54
  55 void BattleState::NextHero() {
  56         ++activeHero;
  57         while (activeHero < numHeroes && heroes[activeHero].Health() == 0) {
  58                 ++activeHero;
  59         }
  60 }
  61
  62 void BattleState::PreviousHero() {
  63         --activeHero;
  64         while (activeHero >= 0 && heroes[activeHero].Health() == 0) {
  65                 --activeHero;
  66         }
  67 }
  68
  69 void BattleState::SwapHeroes(int lhs, int rhs) {
  70         if (lhs < 0 || lhs >= numHeroes || rhs < 0 || rhs >= numHeroes || lhs == rhs) return;
  71         std::swap(heroes[lhs], heroes[rhs]);
  72 }
  73
  74
  75 void BattleState::Resize(int w, int h) {
  76
  77 }
  78
  79
  80 void BattleState::EnterState(Application &ctrl, SDL_Surface *screen) {
  81         monstersLayout->CalculatePositions(background->w, background->h, monsterPositions);
  82         heroesLayout->CalculatePositions(background->w, background->h, heroesPositions);
  83         for (int i(0); i < 4; ++i) {
  84                 heroes[i].SpellMenu() = res->spellMenuPrototype;
  85                 heroes[i].UpdateSpellMenu();
  86                 heroes[i].IkariMenu() = res->ikariMenuPrototype;
  87                 heroes[i].UpdateIkariMenu(res);
  88                 heroTags[i] = HeroTag(this, i);
  89                 smallHeroTags[i] = SmallHeroTag(this, i);
  90         }
  91
  92         int tagHeight(attackTypeMenu.Height());
  93         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
  94         int xOffset((Width() - 2 * tagWidth) / 2);
  95         heroTagPositions[0] = Point<int>(xOffset, Height() - 2 * tagHeight);
  96         heroTagPositions[1] = Point<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
  97         heroTagPositions[2] = Point<int>(xOffset, Height() - tagHeight);
  98         heroTagPositions[3] = Point<int>(xOffset + tagWidth, Height() - tagHeight);
  99
 100         tagHeight = res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2;
 101         tagWidth = res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2;
 102         xOffset = (Width() - 4 * tagWidth) / 2;
 103         int yOffset(Height() - tagHeight);
 104         smallHeroTagPositions[0] = Point<int>(xOffset, yOffset);
 105         smallHeroTagPositions[1] = Point<int>(xOffset + 2 * tagWidth, yOffset);
 106         smallHeroTagPositions[2] = Point<int>(xOffset + tagWidth, yOffset);
 107         smallHeroTagPositions[3] = Point<int>(xOffset + 3 * tagWidth, yOffset);
 108
 109         itemMenu = res->itemMenuPrototype;
 110         LoadInventory();
 111 }
 112
 113 void BattleState::LoadInventory() {
 114         const Inventory &inv(*res->inventory);
 115         itemMenu.Clear();
 116         itemMenu.Reserve(inv.MaxItems());
 117         for (int i(0); i < inv.MaxItems(); ++i) {
 118                 const Item *item(inv.ItemAt(i));
 119                 if (item) {
 120                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 121                 } else {
 122                         itemMenu.AddEmptyEntry();
 123                 }
 124         }
 125         ClearAllAttacks();
 126 }
 127
 128 void BattleState::ExitState(Application &ctrl, SDL_Surface *screen) {
 129
 130 }
 131
 132 void BattleState::ResumeState(Application &ctrl, SDL_Surface *screen) {
 133         if (ranAway) {
 134                 ctrl.PopState(); // quit the battle scene
 135                 return;
 136         }
 137         if (Victory()) {
 138                 // TODO: push victory state
 139                 ctrl.PopState();
 140                 return;
 141         }
 142         if (Defeat()) {
 143                 // TODO: push defeat state
 144                 ctrl.PopState();
 145                 return;
 146         }
 147         // TODO: this should not push a state while quitting
 148         if (AttackSelectionDone()) {
 149                 ctrl.PushState(new PerformAttacks(this));
 150         } else {
 151                 ctrl.PushState(new SelectMoveAction(this));
 152         }
 153 }
 154
 155 bool BattleState::Victory() const {
 156         for (int i(0); i < MaxMonsters(); ++i) {
 157                 if (MonsterAt(i).Health() > 0) return false;
 158         }
 159         return true;
 160 }
 161
 162 bool BattleState::Defeat() const {
 163         for (int i(0); i < NumHeroes(); ++i) {
 164                 if (HeroAt(i).Health() > 0) return false;
 165         }
 166         return true;
 167 }
 168
 169 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 170
 171 }
 172
 173
 174 class OrderCompare {
 175         public:
 176                 OrderCompare(BattleState *battle) : battle(battle) { }
 177                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 178                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 179                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 180                         return lagl > ragl;
 181                 }
 182         private:
 183                 BattleState *battle;
 184 };
 185
 186 void BattleState::CalculateAttackOrder() {
 187         attackOrder.reserve(monsters.size() + NumHeroes());
 188         for (int i(0); i < NumHeroes(); ++i) {
 189                 attackOrder.push_back(Order(i, false));
 190         }
 191         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 192                 attackOrder.push_back(Order(i, true));
 193                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 194         }
 195         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 196 }
 197
 198 void BattleState::NextAttack() {
 199         if (Victory() || Defeat()) {
 200                 attackCursor = attackOrder.size();
 201                 return;
 202         }
 203         ++attackCursor;
 204         while (attackCursor < int(attackOrder.size())) {
 205                 if (attackOrder[attackCursor].isMonster) {
 206                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 207                 } else {
 208                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 209                 }
 210                 ++attackCursor;
 211         }
 212 }
 213
 214 bool BattleState::AttacksFinished() const {
 215         return attackCursor >= int(attackOrder.size())
 216                         || Victory() || Defeat();
 217 }
 218
 219 void BattleState::CalculateDamage() {
 220         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 221         if (ac.GetType() == AttackChoice::DEFEND) return;
 222
 223         if (CurrentAttack().isMonster) {
 224                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 225                 // TODO: run monster's attack script
 226                 ac.SetType(AttackChoice::SWORD);
 227                 ac.Selection().SelectSingle();
 228                 ac.Selection().SelectHeroes();
 229                 for (int i(0); i < NumHeroes(); ++i) {
 230                         if (HeroAt(i).Health() > 0) {
 231                                 const Stats &defenderStats(HeroAt(i).GetStats());
 232                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 233                                 ac.Selection().SetBad(0, damage);
 234                                 break;
 235                         }
 236                 }
 237         } else {
 238                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 239                 TargetSelection &ts(ac.Selection());
 240                 bool hitSome(false);
 241                 if (ts.TargetsEnemies()) {
 242                         for (int i(0); i < MaxMonsters(); ++i) {
 243                                 if (ts.IsSelected(i)) {
 244                                         if (MonsterAt(i).Health() > 0) {
 245                                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 246                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 247                                                 ts.SetBad(i, damage);
 248                                                 hitSome = true;
 249                                         } else {
 250                                                 ts.Unselect(i);
 251                                         }
 252                                 }
 253                         }
 254                         if (hitSome) return;
 255                         for (int i(0); i < MaxMonsters(); ++i) {
 256                                 if (MonsterAt(i).Health() > 0) {
 257                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 258                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 259                                         ts.SetBad(i, damage);
 260                                         break;
 261                                 }
 262                         }
 263                 } else {
 264                         for (int i(0); i < NumHeroes(); ++i) {
 265                                 if (ts.IsSelected(i)) {
 266                                         if (HeroAt(i).Health() > 0) {
 267                                                 const Stats &defenderStats(HeroAt(i).GetStats());
 268                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 269                                                 ts.SetBad(i, damage);
 270                                                 hitSome = true;
 271                                         } else {
 272                                                 ts.Unselect(i);
 273                                         }
 274                                 }
 275                         }
 276                         if (hitSome) return;
 277                         for (int i(0); i < NumHeroes(); ++i) {
 278                                 if (HeroAt(i).Health() > 0) {
 279                                         const Stats &defenderStats(HeroAt(i).GetStats());
 280                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 281                                         ts.SetBad(i, damage);
 282                                         break;
 283                                 }
 284                         }
 285                 }
 286         }
 287 }
 288
 289 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 290         // TODO: find out real formula and add some randomness
 291         return attacker.Attack() / 2 - defender.Defense() / 4;
 292 }
 293
 294 void BattleState::ApplyDamage() {
 295         if (attackCursor < 0) return;
 296         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 297         TargetSelection &ts(ac.Selection());
 298         if (ts.TargetsEnemies()) {
 299                 for (int i(0); i < MaxMonsters(); ++i) {
 300                         Monster &monster(MonsterAt(i));
 301                         if (ts.IsBad(i)) {
 302                                 monster.SubtractHealth(ts.GetAmount(i));
 303                                 if (monster.Health() == 0) {
 304                                         expReward += monster.ExpReward();
 305                                         goldReward += monster.GoldReward();
 306                                 }
 307                         }
 308                 }
 309         } else {
 310                 for (int i(0); i < NumHeroes(); ++i) {
 311                         Hero &hero(HeroAt(i));
 312                         if (ts.IsBad(i)) {
 313                                 hero.SubtractHealth(ts.GetAmount(i));
 314                         }
 315                 }
 316         }
 317 }
 318
 319 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 320         if (CurrentAttack().isMonster) {
 321                 return MonsterAt(CurrentAttack().index).GetAttackChoice();
 322         } else {
 323                 return HeroAt(CurrentAttack().index).GetAttackChoice();
 324         }
 325 }
 326
 327 void BattleState::ClearAllAttacks() {
 328         attackCursor = -1;
 329         activeHero = -1;
 330         for (int i(0); i < NumHeroes(); ++i) {
 331                 HeroAt(i).GetAttackChoice() = AttackChoice(this);
 332         }
 333         for (int i(0); i < MaxMonsters(); ++i) {
 334                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 335         }
 336         attackOrder.clear();
 337 }
 338
 339
 340 void BattleState::HandleEvents(const Input &input) {
 341
 342 }
 343
 344 void BattleState::UpdateWorld(float deltaT) {
 345
 346 }
 347
 348 void BattleState::Render(SDL_Surface *screen) {
 349         assert(screen);
 350         Vector<int> offset(CalculateScreenOffset(screen));
 351         RenderBackground(screen, offset);
 352         RenderMonsters(screen, offset);
 353 }
 354
 355 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 356         assert(screen);
 357         // black for now
 358         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 359         SDL_Rect destRect;
 360         destRect.x = offset.X();
 361         destRect.y = offset.Y();
 362         destRect.w = background->w;
 363         destRect.h = background->h;
 364         SDL_BlitSurface(background, 0, screen, &destRect);
 365 }
 366
 367 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 368         assert(screen);
 369         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 370                 if (MonsterPositionOccupied(i)) {
 371                         if (monsters[i].GetAnimation().Running()) {
 372                                 monsters[i].GetAnimation().DrawCenter(screen, monsterPositions[i] + offset);
 373                         } else {
 374                                 monsters[i].Sprite()->DrawCenter(screen, monsterPositions[i] + offset);
 375                         }
 376                 }
 377         }
 378 }
 379
 380 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 381         assert(screen);
 382         for (int i(0); i < numHeroes; ++i) {
 383                 if (heroes[i].GetAnimation().Running()) {
 384                         heroes[i].GetAnimation().DrawCenter(screen, heroesPositions[i] + offset);
 385                 } else {
 386                         int row(heroes[i].Health() > 0 ? 0 : 2);
 387                         heroes[i].Sprite()->DrawCenter(screen, heroesPositions[i] + offset, 1, row);
 388                 }
 389         }
 390 }
 391
 392 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 393         assert(screen);
 394         int tagHeight(attackTypeMenu.Height());
 395         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 396
 397         for (int i(0); i < numHeroes; ++i) {
 398                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 399         }
 400 }
 401
 402 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 403         assert(screen);
 404         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 405         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 406
 407         SDL_Rect rect;
 408         rect.x = offset.X();
 409         rect.y = offset.Y() + Height() - tagHeight;
 410         rect.w = Width();
 411         rect.h = tagHeight;
 412         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 413         rect.y += res->normalFont->CharHeight() / 8;
 414         rect.h -= res->normalFont->CharHeight() / 4;
 415         SDL_FillRect(screen, &rect, res->heroesBgColor);
 416
 417         for (int i(0); i < numHeroes; ++i) {
 418                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 419         }
 420 }
 421
 422 }