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 <stdexcept>
  25
  26 using app::Application;
  27 using app::Input;
  28 using common::Inventory;
  29 using common::Item;
  30 using common::Spell;
  31 using geometry::Point;
  32 using geometry::Vector;
  33 using graphics::Menu;
  34
  35 using std::vector;
  36
  37 namespace battle {
  38
  39 void BattleState::AddMonster(const Monster &m) {
  40         if (monsters.size() >= monstersLayout->NumPositions()) {
  41                 throw std::overflow_error("too many monsters for layout");
  42         }
  43         monsters.push_back(m);
  44 }
  45
  46 void BattleState::AddHero(const Hero &h) {
  47         if (numHeroes >= 4 || numHeroes >= (int)heroesLayout->NumPositions()) {
  48                 throw std::overflow_error("too many heroes for layout");
  49         }
  50         heroes[numHeroes] = h;
  51         ++numHeroes;
  52 }
  53
  54 void BattleState::NextHero() {
  55         ++activeHero;
  56         while (activeHero < numHeroes && heroes[activeHero].Health() == 0) {
  57                 ++activeHero;
  58         }
  59 }
  60
  61 void BattleState::SwapHeroes(int lhs, int rhs) {
  62         if (lhs < 0 || lhs >= numHeroes || rhs < 0 || rhs >= numHeroes || lhs == rhs) return;
  63         std::swap(heroes[lhs], heroes[rhs]);
  64 }
  65
  66
  67 void BattleState::Resize(int w, int h) {
  68
  69 }
  70
  71
  72 void BattleState::EnterState(Application &ctrl, SDL_Surface *screen) {
  73         monstersLayout->CalculatePositions(background->w, background->h, monsterPositions);
  74         heroesLayout->CalculatePositions(background->w, background->h, heroesPositions);
  75         for (int i(0); i < 4; ++i) {
  76                 spellMenus[i] = res->spellMenuPrototype;
  77                 LoadSpellMenu(i);
  78                 ikariMenus[i] = res->ikariMenuPrototype;
  79                 LoadIkariMenu(i);
  80                 heroTags[i] = HeroTag(this, i);
  81                 smallHeroTags[i] = SmallHeroTag(this, i);
  82         }
  83
  84         int tagHeight(attackTypeMenu.Height());
  85         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
  86         int xOffset((Width() - 2 * tagWidth) / 2);
  87         heroTagPositions[0] = Point<int>(xOffset, Height() - 2 * tagHeight);
  88         heroTagPositions[1] = Point<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
  89         heroTagPositions[2] = Point<int>(xOffset, Height() - tagHeight);
  90         heroTagPositions[3] = Point<int>(xOffset + tagWidth, Height() - tagHeight);
  91
  92         tagHeight = res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2;
  93         tagWidth = res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2;
  94         xOffset = (Width() - 4 * tagWidth) / 2;
  95         int yOffset(Height() - tagHeight);
  96         smallHeroTagPositions[0] = Point<int>(xOffset, yOffset);
  97         smallHeroTagPositions[1] = Point<int>(xOffset + 2 * tagWidth, yOffset);
  98         smallHeroTagPositions[2] = Point<int>(xOffset + tagWidth, yOffset);
  99         smallHeroTagPositions[3] = Point<int>(xOffset + 3 * tagWidth, yOffset);
 100
 101         itemMenu = res->itemMenuPrototype;
 102         LoadInventory();
 103 }
 104
 105 void BattleState::LoadSpellMenu(vector<Hero>::size_type index) {
 106         spellMenus[index].Clear();
 107         spellMenus[index].Reserve(HeroAt(index).Spells().size());
 108         for (vector<const Spell *>::const_iterator i(HeroAt(index).Spells().begin()), end(HeroAt(index).Spells().end()); i != end; ++i) {
 109                 bool enabled((*i)->CanUseInBattle() && (*i)->Cost() <= HeroAt(index).Mana());
 110                 spellMenus[index].Add((*i)->Name(), *i, enabled, 0, (*i)->Cost());
 111         }
 112 }
 113
 114 void BattleState::LoadIkariMenu(vector<Hero>::size_type index) {
 115         ikariMenus[index].Clear();
 116         ikariMenus[index].Reserve(6);
 117
 118         if (HeroAt(index).HasWeapon()) {
 119                 ikariMenus[index].Add(
 120                                 HeroAt(index).Weapon()->Name(),
 121                                 HeroAt(index).Weapon(),
 122                                 HeroAt(index).Weapon()->HasIkari() && HeroAt(index).Weapon()->GetIkari()->Cost() <= HeroAt(index).IP(),
 123                                 res->weaponMenuIcon,
 124                                 0,
 125                                 HeroAt(index).Weapon()->HasIkari() ? HeroAt(index).Weapon()->GetIkari()->Name() : "");
 126         } else {
 127                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->weaponMenuIcon);
 128         }
 129
 130         if (HeroAt(index).HasArmor()) {
 131                 ikariMenus[index].Add(
 132                                 HeroAt(index).Armor()->Name(),
 133                                 HeroAt(index).Armor(),
 134                                 HeroAt(index).Armor()->HasIkari() && HeroAt(index).Armor()->GetIkari()->Cost() <= HeroAt(index).IP(),
 135                                 res->armorMenuIcon,
 136                                 0,
 137                                 HeroAt(index).Armor()->HasIkari() ? HeroAt(index).Armor()->GetIkari()->Name() : "");
 138         } else {
 139                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->armorMenuIcon);
 140         }
 141
 142         if (HeroAt(index).HasShield()) {
 143                 ikariMenus[index].Add(
 144                                 HeroAt(index).Shield()->Name(),
 145                                 HeroAt(index).Shield(),
 146                                 HeroAt(index).Shield()->HasIkari() && HeroAt(index).Shield()->GetIkari()->Cost() <= HeroAt(index).IP(),
 147                                 res->shieldMenuIcon,
 148                                 0,
 149                                 HeroAt(index).Shield()->HasIkari() ? HeroAt(index).Shield()->GetIkari()->Name() : "");
 150         } else {
 151                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->shieldMenuIcon);
 152         }
 153
 154         if (HeroAt(index).HasHelmet()) {
 155                 ikariMenus[index].Add(
 156                                 HeroAt(index).Helmet()->Name(),
 157                                 HeroAt(index).Helmet(),
 158                                 HeroAt(index).Helmet()->HasIkari() && HeroAt(index).Helmet()->GetIkari()->Cost() <= HeroAt(index).IP(),
 159                                 res->helmetMenuIcon,
 160                                 0,
 161                                 HeroAt(index).Helmet()->HasIkari() ? HeroAt(index).Helmet()->GetIkari()->Name() : "");
 162         } else {
 163                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->helmetMenuIcon);
 164         }
 165
 166         if (HeroAt(index).HasRing()) {
 167                 ikariMenus[index].Add(
 168                                 HeroAt(index).Ring()->Name(),
 169                                 HeroAt(index).Ring(),
 170                                 HeroAt(index).Ring()->HasIkari() && HeroAt(index).Ring()->GetIkari()->Cost() <= HeroAt(index).IP(),
 171                                 res->ringMenuIcon,
 172                                 0,
 173                                 HeroAt(index).Ring()->HasIkari() ? HeroAt(index).Ring()->GetIkari()->Name() : "");
 174         } else {
 175                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->ringMenuIcon);
 176         }
 177
 178         if (HeroAt(index).HasJewel()) {
 179                 ikariMenus[index].Add(
 180                                 HeroAt(index).Jewel()->Name(),
 181                                 HeroAt(index).Jewel(),
 182                                 HeroAt(index).Jewel()->HasIkari() && HeroAt(index).Jewel()->GetIkari()->Cost() <= HeroAt(index).IP(),
 183                                 res->jewelMenuIcon,
 184                                 0,
 185                                 HeroAt(index).Jewel()->HasIkari() ? HeroAt(index).Jewel()->GetIkari()->Name() : "");
 186         } else {
 187                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->jewelMenuIcon);
 188         }
 189 }
 190
 191 void BattleState::LoadInventory() {
 192         const Inventory &inv(*res->inventory);
 193         itemMenu.Clear();
 194         itemMenu.Reserve(inv.MaxItems());
 195         for (int i(0); i < inv.MaxItems(); ++i) {
 196                 const Item *item(inv.ItemAt(i));
 197                 if (item) {
 198                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 199                 } else {
 200                         itemMenu.AddEmptyEntry();
 201                 }
 202         }
 203         ClearAllAttacks();
 204 }
 205
 206 void BattleState::ExitState(Application &ctrl, SDL_Surface *screen) {
 207
 208 }
 209
 210 void BattleState::ResumeState(Application &ctrl, SDL_Surface *screen) {
 211         // TODO: check for victory or defeat
 212         if (ranAway) {
 213                 ctrl.PopState(); // quit the battle scene
 214                 return;
 215         }
 216         if (Victory()) {
 217                 // TODO: push victory state
 218                 ctrl.PopState();
 219                 return;
 220         }
 221         if (Defeat()) {
 222                 // TODO: push defeat state
 223                 ctrl.PopState();
 224                 return;
 225         }
 226         // TODO: this should not push a state while quitting
 227         if (AttackSelectionDone()) {
 228                 ctrl.PushState(new PerformAttacks(this));
 229         } else {
 230                 ctrl.PushState(new SelectMoveAction(this));
 231         }
 232 }
 233
 234 bool BattleState::Victory() const {
 235         for (int i(0); i < MaxMonsters(); ++i) {
 236                 if (MonsterAt(i).Health() > 0) return false;
 237         }
 238         return true;
 239 }
 240
 241 bool BattleState::Defeat() const {
 242         for (int i(0); i < NumHeroes(); ++i) {
 243                 if (HeroAt(i).Health() > 0) return false;
 244         }
 245         return true;
 246 }
 247
 248 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 249
 250 }
 251
 252
 253 class OrderCompare {
 254         public:
 255                 OrderCompare(BattleState *battle) : battle(battle) { }
 256                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 257                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 258                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 259                         return lagl > ragl;
 260                 }
 261         private:
 262                 BattleState *battle;
 263 };
 264
 265 void BattleState::CalculateAttackOrder() {
 266         attackOrder.reserve(monsters.size() + NumHeroes());
 267         for (int i(0); i < numHeroes; ++i) {
 268                 attackOrder.push_back(Order(i, false));
 269         }
 270         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 271                 attackOrder.push_back(Order(i, true));
 272         }
 273         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 274
 275         monsterAttacks.resize(monsters.size(), AttackChoice(this));
 276 }
 277
 278 void BattleState::NextAttack() {
 279         ++attackCursor;
 280         while (attackCursor < int(attackOrder.size())) {
 281                 if (attackOrder[attackCursor].isMonster) {
 282                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 283                 } else {
 284                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 285                 }
 286                 ++attackCursor;
 287         }
 288 }
 289
 290 void BattleState::CalculateDamage() {
 291         if (CurrentAttack().isMonster) {
 292                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 293                 // TODO: run monster's attack script
 294                 monsterAttacks[CurrentAttack().index].SetType(AttackChoice::SWORD);
 295                 monsterAttacks[CurrentAttack().index].Selection().SelectSingle();
 296                 monsterAttacks[CurrentAttack().index].Selection().SelectHeroes();
 297                 for (int i(0); i < NumHeroes(); ++i) {
 298                         if (HeroAt(i).Health() > 0) {
 299                                 const Stats &defenderStats(HeroAt(i).GetStats());
 300                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 301                                 monsterAttacks[CurrentAttack().index].Selection().SetBad(0, damage);
 302                                 break;
 303                         }
 304                 }
 305         } else {
 306                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 307                 TargetSelection &ts(AttackChoiceAt(CurrentAttack().index).Selection());
 308                 bool hitSome(false);
 309                 if (ts.TargetsEnemies()) {
 310                         for (int i(0); i < MaxMonsters(); ++i) {
 311                                 if (ts.IsSelected(i)) {
 312                                         if (MonsterAt(i).Health() > 0) {
 313                                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 314                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 315                                                 ts.SetBad(i, damage);
 316                                                 hitSome = true;
 317                                         } else {
 318                                                 ts.Unselect(i);
 319                                         }
 320                                 }
 321                         }
 322                         if (hitSome) return;
 323                         for (int i(0); i < MaxMonsters(); ++i) {
 324                                 if (MonsterAt(i).Health() > 0) {
 325                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 326                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 327                                         ts.SetBad(i, damage);
 328                                         break;
 329                                 }
 330                         }
 331                 } else {
 332                         for (int i(0); i < NumHeroes(); ++i) {
 333                                 if (ts.IsSelected(i)) {
 334                                         if (HeroAt(i).Health() > 0) {
 335                                                 const Stats &defenderStats(HeroAt(i).GetStats());
 336                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 337                                                 ts.SetBad(i, damage);
 338                                                 hitSome = true;
 339                                         } else {
 340                                                 ts.Unselect(i);
 341                                         }
 342                                 }
 343                         }
 344                         if (hitSome) return;
 345                         for (int i(0); i < NumHeroes(); ++i) {
 346                                 if (HeroAt(i).Health() > 0) {
 347                                         const Stats &defenderStats(HeroAt(i).GetStats());
 348                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 349                                         ts.SetBad(i, damage);
 350                                         break;
 351                                 }
 352                         }
 353                 }
 354         }
 355 }
 356
 357 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 358         // TODO: find out real formula and add some randomness
 359         return attacker.Attack() / 2 - defender.Defense() / 4;
 360 }
 361
 362 void BattleState::ApplyDamage() {
 363         if (attackCursor < 0) return;
 364         AttackChoice &ac(CurrentAttack().isMonster ? monsterAttacks[CurrentAttack().index] : AttackChoiceAt(CurrentAttack().index));
 365         TargetSelection &ts(ac.Selection());
 366         if (ts.TargetsEnemies()) {
 367                 for (int i(0); i < MaxMonsters(); ++i) {
 368                         if (ts.IsBad(i)) {
 369                                 MonsterAt(i).SubtractHealth(ts.GetAmount(i));
 370                         }
 371                 }
 372         } else {
 373                 for (int i(0); i < NumHeroes(); ++i) {
 374                         if (ts.IsBad(i)) {
 375                                 HeroAt(i).SubtractHealth(ts.GetAmount(i));
 376                         }
 377                 }
 378         }
 379 }
 380
 381 void BattleState::ClearAllAttacks() {
 382         attackCursor = -1;
 383         activeHero = -1;
 384         for (int i(0); i < numHeroes; ++i) {
 385                 attackChoices[i] = AttackChoice(this);
 386         }
 387         attackOrder.clear();
 388         monsterAttacks.clear();
 389 }
 390
 391
 392 void BattleState::HandleEvents(const Input &input) {
 393
 394 }
 395
 396 void BattleState::UpdateWorld(float deltaT) {
 397
 398 }
 399
 400 void BattleState::Render(SDL_Surface *screen) {
 401         Vector<int> offset(CalculateScreenOffset(screen));
 402         RenderBackground(screen, offset);
 403         RenderMonsters(screen, offset);
 404 }
 405
 406 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 407         // black for now
 408         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 409         SDL_Rect destRect;
 410         destRect.x = offset.X();
 411         destRect.y = offset.Y();
 412         destRect.w = background->w;
 413         destRect.h = background->h;
 414         SDL_BlitSurface(background, 0, screen, &destRect);
 415 }
 416
 417 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 418         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 419                 if (MonsterPositionOccupied(i)) {
 420                         monsters[i].Sprite()->DrawCenter(screen, monsterPositions[i] + offset);
 421                 }
 422         }
 423 }
 424
 425 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 426         for (int i(0); i < numHeroes; ++i) {
 427                 if (heroes[i].AttackAnimation() && heroes[i].AttackAnimation()->Running()) {
 428                         heroes[i].AttackAnimation()->DrawCenter(screen, heroesPositions[i] + offset);
 429                 } else if (heroes[i].SpellAnimation() && heroes[i].SpellAnimation()->Running()) {
 430                         heroes[i].SpellAnimation()->DrawCenter(screen, heroesPositions[i] + offset);
 431                 } else {
 432                         int row(heroes[i].Health() > 0 ? 0 : 2);
 433                         heroes[i].Sprite()->DrawCenter(screen, heroesPositions[i] + offset, 1, row);
 434                 }
 435         }
 436 }
 437
 438 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 439         int tagHeight(attackTypeMenu.Height());
 440         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 441
 442         for (int i(0); i < numHeroes; ++i) {
 443                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 444         }
 445 }
 446
 447 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 448         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 449         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 450
 451         SDL_Rect rect;
 452         rect.x = offset.X();
 453         rect.y = offset.Y() + Height() - tagHeight;
 454         rect.w = Width();
 455         rect.h = tagHeight;
 456         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 457         rect.y += res->normalFont->CharHeight() / 8;
 458         rect.h -= res->normalFont->CharHeight() / 4;
 459         SDL_FillRect(screen, &rect, res->heroesBgColor);
 460
 461         for (int i(0); i < numHeroes; ++i) {
 462                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 463         }
 464 }
 465
 466 }