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::SwapHeroes(int lhs, int rhs) {
  63         if (lhs < 0 || lhs >= numHeroes || rhs < 0 || rhs >= numHeroes || lhs == rhs) return;
  64         std::swap(heroes[lhs], heroes[rhs]);
  65 }
  66
  67
  68 void BattleState::Resize(int w, int h) {
  69
  70 }
  71
  72
  73 void BattleState::EnterState(Application &ctrl, SDL_Surface *screen) {
  74         monstersLayout->CalculatePositions(background->w, background->h, monsterPositions);
  75         heroesLayout->CalculatePositions(background->w, background->h, heroesPositions);
  76         for (int i(0); i < 4; ++i) {
  77                 spellMenus[i] = res->spellMenuPrototype;
  78                 LoadSpellMenu(i);
  79                 ikariMenus[i] = res->ikariMenuPrototype;
  80                 LoadIkariMenu(i);
  81                 heroTags[i] = HeroTag(this, i);
  82                 smallHeroTags[i] = SmallHeroTag(this, i);
  83         }
  84
  85         int tagHeight(attackTypeMenu.Height());
  86         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
  87         int xOffset((Width() - 2 * tagWidth) / 2);
  88         heroTagPositions[0] = Point<int>(xOffset, Height() - 2 * tagHeight);
  89         heroTagPositions[1] = Point<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
  90         heroTagPositions[2] = Point<int>(xOffset, Height() - tagHeight);
  91         heroTagPositions[3] = Point<int>(xOffset + tagWidth, Height() - tagHeight);
  92
  93         tagHeight = res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2;
  94         tagWidth = res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2;
  95         xOffset = (Width() - 4 * tagWidth) / 2;
  96         int yOffset(Height() - tagHeight);
  97         smallHeroTagPositions[0] = Point<int>(xOffset, yOffset);
  98         smallHeroTagPositions[1] = Point<int>(xOffset + 2 * tagWidth, yOffset);
  99         smallHeroTagPositions[2] = Point<int>(xOffset + tagWidth, yOffset);
 100         smallHeroTagPositions[3] = Point<int>(xOffset + 3 * tagWidth, yOffset);
 101
 102         itemMenu = res->itemMenuPrototype;
 103         LoadInventory();
 104 }
 105
 106 void BattleState::LoadSpellMenu(vector<Hero>::size_type index) {
 107         assert(index >= 0 && index < 4);
 108         spellMenus[index].Clear();
 109         spellMenus[index].Reserve(HeroAt(index).Spells().size());
 110         for (vector<const Spell *>::const_iterator i(HeroAt(index).Spells().begin()), end(HeroAt(index).Spells().end()); i != end; ++i) {
 111                 bool enabled((*i)->CanUseInBattle() && (*i)->Cost() <= HeroAt(index).Mana());
 112                 spellMenus[index].Add((*i)->Name(), *i, enabled, 0, (*i)->Cost());
 113         }
 114 }
 115
 116 void BattleState::LoadIkariMenu(vector<Hero>::size_type index) {
 117         assert(index >= 0 && index < 4);
 118         ikariMenus[index].Clear();
 119         ikariMenus[index].Reserve(6);
 120
 121         if (HeroAt(index).HasWeapon()) {
 122                 ikariMenus[index].Add(
 123                                 HeroAt(index).Weapon()->Name(),
 124                                 HeroAt(index).Weapon(),
 125                                 HeroAt(index).Weapon()->HasIkari() && HeroAt(index).Weapon()->GetIkari()->Cost() <= HeroAt(index).IP(),
 126                                 res->weaponMenuIcon,
 127                                 0,
 128                                 HeroAt(index).Weapon()->HasIkari() ? HeroAt(index).Weapon()->GetIkari()->Name() : "");
 129         } else {
 130                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->weaponMenuIcon);
 131         }
 132
 133         if (HeroAt(index).HasArmor()) {
 134                 ikariMenus[index].Add(
 135                                 HeroAt(index).Armor()->Name(),
 136                                 HeroAt(index).Armor(),
 137                                 HeroAt(index).Armor()->HasIkari() && HeroAt(index).Armor()->GetIkari()->Cost() <= HeroAt(index).IP(),
 138                                 res->armorMenuIcon,
 139                                 0,
 140                                 HeroAt(index).Armor()->HasIkari() ? HeroAt(index).Armor()->GetIkari()->Name() : "");
 141         } else {
 142                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->armorMenuIcon);
 143         }
 144
 145         if (HeroAt(index).HasShield()) {
 146                 ikariMenus[index].Add(
 147                                 HeroAt(index).Shield()->Name(),
 148                                 HeroAt(index).Shield(),
 149                                 HeroAt(index).Shield()->HasIkari() && HeroAt(index).Shield()->GetIkari()->Cost() <= HeroAt(index).IP(),
 150                                 res->shieldMenuIcon,
 151                                 0,
 152                                 HeroAt(index).Shield()->HasIkari() ? HeroAt(index).Shield()->GetIkari()->Name() : "");
 153         } else {
 154                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->shieldMenuIcon);
 155         }
 156
 157         if (HeroAt(index).HasHelmet()) {
 158                 ikariMenus[index].Add(
 159                                 HeroAt(index).Helmet()->Name(),
 160                                 HeroAt(index).Helmet(),
 161                                 HeroAt(index).Helmet()->HasIkari() && HeroAt(index).Helmet()->GetIkari()->Cost() <= HeroAt(index).IP(),
 162                                 res->helmetMenuIcon,
 163                                 0,
 164                                 HeroAt(index).Helmet()->HasIkari() ? HeroAt(index).Helmet()->GetIkari()->Name() : "");
 165         } else {
 166                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->helmetMenuIcon);
 167         }
 168
 169         if (HeroAt(index).HasRing()) {
 170                 ikariMenus[index].Add(
 171                                 HeroAt(index).Ring()->Name(),
 172                                 HeroAt(index).Ring(),
 173                                 HeroAt(index).Ring()->HasIkari() && HeroAt(index).Ring()->GetIkari()->Cost() <= HeroAt(index).IP(),
 174                                 res->ringMenuIcon,
 175                                 0,
 176                                 HeroAt(index).Ring()->HasIkari() ? HeroAt(index).Ring()->GetIkari()->Name() : "");
 177         } else {
 178                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->ringMenuIcon);
 179         }
 180
 181         if (HeroAt(index).HasJewel()) {
 182                 ikariMenus[index].Add(
 183                                 HeroAt(index).Jewel()->Name(),
 184                                 HeroAt(index).Jewel(),
 185                                 HeroAt(index).Jewel()->HasIkari() && HeroAt(index).Jewel()->GetIkari()->Cost() <= HeroAt(index).IP(),
 186                                 res->jewelMenuIcon,
 187                                 0,
 188                                 HeroAt(index).Jewel()->HasIkari() ? HeroAt(index).Jewel()->GetIkari()->Name() : "");
 189         } else {
 190                 ikariMenus[index].Add(res->noEquipmentText, 0, false, res->jewelMenuIcon);
 191         }
 192 }
 193
 194 void BattleState::LoadInventory() {
 195         const Inventory &inv(*res->inventory);
 196         itemMenu.Clear();
 197         itemMenu.Reserve(inv.MaxItems());
 198         for (int i(0); i < inv.MaxItems(); ++i) {
 199                 const Item *item(inv.ItemAt(i));
 200                 if (item) {
 201                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 202                 } else {
 203                         itemMenu.AddEmptyEntry();
 204                 }
 205         }
 206         ClearAllAttacks();
 207 }
 208
 209 void BattleState::ExitState(Application &ctrl, SDL_Surface *screen) {
 210
 211 }
 212
 213 void BattleState::ResumeState(Application &ctrl, SDL_Surface *screen) {
 214         if (ranAway) {
 215                 ctrl.PopState(); // quit the battle scene
 216                 return;
 217         }
 218         if (Victory()) {
 219                 // TODO: push victory state
 220                 ctrl.PopState();
 221                 return;
 222         }
 223         if (Defeat()) {
 224                 // TODO: push defeat state
 225                 ctrl.PopState();
 226                 return;
 227         }
 228         // TODO: this should not push a state while quitting
 229         if (AttackSelectionDone()) {
 230                 ctrl.PushState(new PerformAttacks(this));
 231         } else {
 232                 ctrl.PushState(new SelectMoveAction(this));
 233         }
 234 }
 235
 236 bool BattleState::Victory() const {
 237         for (int i(0); i < MaxMonsters(); ++i) {
 238                 if (MonsterAt(i).Health() > 0) return false;
 239         }
 240         return true;
 241 }
 242
 243 bool BattleState::Defeat() const {
 244         for (int i(0); i < NumHeroes(); ++i) {
 245                 if (HeroAt(i).Health() > 0) return false;
 246         }
 247         return true;
 248 }
 249
 250 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 251
 252 }
 253
 254
 255 class OrderCompare {
 256         public:
 257                 OrderCompare(BattleState *battle) : battle(battle) { }
 258                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 259                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 260                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 261                         return lagl > ragl;
 262                 }
 263         private:
 264                 BattleState *battle;
 265 };
 266
 267 void BattleState::CalculateAttackOrder() {
 268         attackOrder.reserve(monsters.size() + NumHeroes());
 269         for (int i(0); i < NumHeroes(); ++i) {
 270                 attackOrder.push_back(Order(i, false));
 271         }
 272         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 273                 attackOrder.push_back(Order(i, true));
 274         }
 275         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 276
 277         monsterAttacks.resize(monsters.size(), AttackChoice(this));
 278 }
 279
 280 void BattleState::NextAttack() {
 281         if (Victory() || Defeat()) {
 282                 attackCursor = attackOrder.size();
 283                 return;
 284         }
 285         ++attackCursor;
 286         while (attackCursor < int(attackOrder.size())) {
 287                 if (attackOrder[attackCursor].isMonster) {
 288                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 289                 } else {
 290                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 291                 }
 292                 ++attackCursor;
 293         }
 294 }
 295
 296 bool BattleState::AttacksFinished() const {
 297         return attackCursor >= int(attackOrder.size())
 298                         || Victory() || Defeat();
 299 }
 300
 301 void BattleState::CalculateDamage() {
 302         AttackChoice &ac(CurrentAttack().isMonster ? monsterAttacks[CurrentAttack().index] : AttackChoiceAt(CurrentAttack().index));
 303         if (ac.GetType() == AttackChoice::DEFEND) return;
 304
 305         if (CurrentAttack().isMonster) {
 306                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 307                 // TODO: run monster's attack script
 308                 ac.SetType(AttackChoice::SWORD);
 309                 ac.Selection().SelectSingle();
 310                 ac.Selection().SelectHeroes();
 311                 for (int i(0); i < NumHeroes(); ++i) {
 312                         if (HeroAt(i).Health() > 0) {
 313                                 const Stats &defenderStats(HeroAt(i).GetStats());
 314                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 315                                 ac.Selection().SetBad(0, damage);
 316                                 break;
 317                         }
 318                 }
 319         } else {
 320                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 321                 TargetSelection &ts(ac.Selection());
 322                 bool hitSome(false);
 323                 if (ts.TargetsEnemies()) {
 324                         for (int i(0); i < MaxMonsters(); ++i) {
 325                                 if (ts.IsSelected(i)) {
 326                                         if (MonsterAt(i).Health() > 0) {
 327                                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 328                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 329                                                 ts.SetBad(i, damage);
 330                                                 hitSome = true;
 331                                         } else {
 332                                                 ts.Unselect(i);
 333                                         }
 334                                 }
 335                         }
 336                         if (hitSome) return;
 337                         for (int i(0); i < MaxMonsters(); ++i) {
 338                                 if (MonsterAt(i).Health() > 0) {
 339                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 340                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 341                                         ts.SetBad(i, damage);
 342                                         break;
 343                                 }
 344                         }
 345                 } else {
 346                         for (int i(0); i < NumHeroes(); ++i) {
 347                                 if (ts.IsSelected(i)) {
 348                                         if (HeroAt(i).Health() > 0) {
 349                                                 const Stats &defenderStats(HeroAt(i).GetStats());
 350                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 351                                                 ts.SetBad(i, damage);
 352                                                 hitSome = true;
 353                                         } else {
 354                                                 ts.Unselect(i);
 355                                         }
 356                                 }
 357                         }
 358                         if (hitSome) return;
 359                         for (int i(0); i < NumHeroes(); ++i) {
 360                                 if (HeroAt(i).Health() > 0) {
 361                                         const Stats &defenderStats(HeroAt(i).GetStats());
 362                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 363                                         ts.SetBad(i, damage);
 364                                         break;
 365                                 }
 366                         }
 367                 }
 368         }
 369 }
 370
 371 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 372         // TODO: find out real formula and add some randomness
 373         return attacker.Attack() / 2 - defender.Defense() / 4;
 374 }
 375
 376 void BattleState::ApplyDamage() {
 377         if (attackCursor < 0) return;
 378         AttackChoice &ac(CurrentAttack().isMonster ? monsterAttacks[CurrentAttack().index] : AttackChoiceAt(CurrentAttack().index));
 379         TargetSelection &ts(ac.Selection());
 380         if (ts.TargetsEnemies()) {
 381                 for (int i(0); i < MaxMonsters(); ++i) {
 382                         Monster &monster(MonsterAt(i));
 383                         if (ts.IsBad(i)) {
 384                                 monster.SubtractHealth(ts.GetAmount(i));
 385                                 if (monster.Health() == 0) {
 386                                         expReward += monster.ExpReward();
 387                                         goldReward += monster.GoldReward();
 388                                 }
 389                         }
 390                 }
 391         } else {
 392                 for (int i(0); i < NumHeroes(); ++i) {
 393                         Hero &hero(HeroAt(i));
 394                         if (ts.IsBad(i)) {
 395                                 hero.SubtractHealth(ts.GetAmount(i));
 396                         }
 397                 }
 398         }
 399 }
 400
 401 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 402         if (CurrentAttack().isMonster) {
 403                 return monsterAttacks[CurrentAttack().index];
 404         } else {
 405                 return AttackChoiceAt(CurrentAttack().index);
 406         }
 407 }
 408
 409 void BattleState::ClearAllAttacks() {
 410         attackCursor = -1;
 411         activeHero = -1;
 412         for (int i(0); i < numHeroes; ++i) {
 413                 attackChoices[i] = AttackChoice(this);
 414         }
 415         attackOrder.clear();
 416         monsterAttacks.clear();
 417 }
 418
 419
 420 void BattleState::HandleEvents(const Input &input) {
 421
 422 }
 423
 424 void BattleState::UpdateWorld(float deltaT) {
 425
 426 }
 427
 428 void BattleState::Render(SDL_Surface *screen) {
 429         assert(screen);
 430         Vector<int> offset(CalculateScreenOffset(screen));
 431         RenderBackground(screen, offset);
 432         RenderMonsters(screen, offset);
 433 }
 434
 435 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 436         assert(screen);
 437         // black for now
 438         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 439         SDL_Rect destRect;
 440         destRect.x = offset.X();
 441         destRect.y = offset.Y();
 442         destRect.w = background->w;
 443         destRect.h = background->h;
 444         SDL_BlitSurface(background, 0, screen, &destRect);
 445 }
 446
 447 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 448         assert(screen);
 449         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 450                 if (MonsterPositionOccupied(i)) {
 451                         // TODO: better solution for running animations
 452                         if (monsters[i].GetAnimation().Running()) {
 453                                 monsters[i].GetAnimation().DrawCenter(screen, monsterPositions[i] + offset);
 454                         } else {
 455                                 monsters[i].Sprite()->DrawCenter(screen, monsterPositions[i] + offset);
 456                         }
 457                 }
 458         }
 459 }
 460
 461 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 462         assert(screen);
 463         for (int i(0); i < numHeroes; ++i) {
 464                 if (heroes[i].GetAnimation().Running()) {
 465                         heroes[i].GetAnimation().DrawCenter(screen, heroesPositions[i] + offset);
 466                 } else {
 467                         int row(heroes[i].Health() > 0 ? 0 : 2);
 468                         heroes[i].Sprite()->DrawCenter(screen, heroesPositions[i] + offset, 1, row);
 469                 }
 470         }
 471 }
 472
 473 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 474         assert(screen);
 475         int tagHeight(attackTypeMenu.Height());
 476         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 477
 478         for (int i(0); i < numHeroes; ++i) {
 479                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 480         }
 481 }
 482
 483 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 484         assert(screen);
 485         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 486         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 487
 488         SDL_Rect rect;
 489         rect.x = offset.X();
 490         rect.y = offset.Y() + Height() - tagHeight;
 491         rect.w = Width();
 492         rect.h = tagHeight;
 493         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 494         rect.y += res->normalFont->CharHeight() / 8;
 495         rect.h -= res->normalFont->CharHeight() / 4;
 496         SDL_FillRect(screen, &rect, res->heroesBgColor);
 497
 498         for (int i(0); i < numHeroes; ++i) {
 499                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 500         }
 501 }
 502
 503 }