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