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                 heroes[i].SpellMenu() = res->spellMenuPrototype;
  78                 heroes[i].UpdateSpellMenu();
  79                 heroes[i].IkariMenu() = res->ikariMenuPrototype;
  80                 heroes[i].UpdateIkariMenu(res);
  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::LoadInventory() {
 107         const Inventory &inv(*res->inventory);
 108         itemMenu.Clear();
 109         itemMenu.Reserve(inv.MaxItems());
 110         for (int i(0); i < inv.MaxItems(); ++i) {
 111                 const Item *item(inv.ItemAt(i));
 112                 if (item) {
 113                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 114                 } else {
 115                         itemMenu.AddEmptyEntry();
 116                 }
 117         }
 118         ClearAllAttacks();
 119 }
 120
 121 void BattleState::ExitState(Application &ctrl, SDL_Surface *screen) {
 122
 123 }
 124
 125 void BattleState::ResumeState(Application &ctrl, SDL_Surface *screen) {
 126         if (ranAway) {
 127                 ctrl.PopState(); // quit the battle scene
 128                 return;
 129         }
 130         if (Victory()) {
 131                 // TODO: push victory state
 132                 ctrl.PopState();
 133                 return;
 134         }
 135         if (Defeat()) {
 136                 // TODO: push defeat state
 137                 ctrl.PopState();
 138                 return;
 139         }
 140         // TODO: this should not push a state while quitting
 141         if (AttackSelectionDone()) {
 142                 ctrl.PushState(new PerformAttacks(this));
 143         } else {
 144                 ctrl.PushState(new SelectMoveAction(this));
 145         }
 146 }
 147
 148 bool BattleState::Victory() const {
 149         for (int i(0); i < MaxMonsters(); ++i) {
 150                 if (MonsterAt(i).Health() > 0) return false;
 151         }
 152         return true;
 153 }
 154
 155 bool BattleState::Defeat() const {
 156         for (int i(0); i < NumHeroes(); ++i) {
 157                 if (HeroAt(i).Health() > 0) return false;
 158         }
 159         return true;
 160 }
 161
 162 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 163
 164 }
 165
 166
 167 class OrderCompare {
 168         public:
 169                 OrderCompare(BattleState *battle) : battle(battle) { }
 170                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 171                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 172                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 173                         return lagl > ragl;
 174                 }
 175         private:
 176                 BattleState *battle;
 177 };
 178
 179 void BattleState::CalculateAttackOrder() {
 180         attackOrder.reserve(monsters.size() + NumHeroes());
 181         for (int i(0); i < NumHeroes(); ++i) {
 182                 attackOrder.push_back(Order(i, false));
 183         }
 184         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 185                 attackOrder.push_back(Order(i, true));
 186         }
 187         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 188
 189         monsterAttacks.resize(monsters.size(), AttackChoice(this));
 190 }
 191
 192 void BattleState::NextAttack() {
 193         if (Victory() || Defeat()) {
 194                 attackCursor = attackOrder.size();
 195                 return;
 196         }
 197         ++attackCursor;
 198         while (attackCursor < int(attackOrder.size())) {
 199                 if (attackOrder[attackCursor].isMonster) {
 200                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 201                 } else {
 202                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 203                 }
 204                 ++attackCursor;
 205         }
 206 }
 207
 208 bool BattleState::AttacksFinished() const {
 209         return attackCursor >= int(attackOrder.size())
 210                         || Victory() || Defeat();
 211 }
 212
 213 void BattleState::CalculateDamage() {
 214         AttackChoice &ac(CurrentAttack().isMonster ? monsterAttacks[CurrentAttack().index] : AttackChoiceAt(CurrentAttack().index));
 215         if (ac.GetType() == AttackChoice::DEFEND) return;
 216
 217         if (CurrentAttack().isMonster) {
 218                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 219                 // TODO: run monster's attack script
 220                 ac.SetType(AttackChoice::SWORD);
 221                 ac.Selection().SelectSingle();
 222                 ac.Selection().SelectHeroes();
 223                 for (int i(0); i < NumHeroes(); ++i) {
 224                         if (HeroAt(i).Health() > 0) {
 225                                 const Stats &defenderStats(HeroAt(i).GetStats());
 226                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 227                                 ac.Selection().SetBad(0, damage);
 228                                 break;
 229                         }
 230                 }
 231         } else {
 232                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 233                 TargetSelection &ts(ac.Selection());
 234                 bool hitSome(false);
 235                 if (ts.TargetsEnemies()) {
 236                         for (int i(0); i < MaxMonsters(); ++i) {
 237                                 if (ts.IsSelected(i)) {
 238                                         if (MonsterAt(i).Health() > 0) {
 239                                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 240                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 241                                                 ts.SetBad(i, damage);
 242                                                 hitSome = true;
 243                                         } else {
 244                                                 ts.Unselect(i);
 245                                         }
 246                                 }
 247                         }
 248                         if (hitSome) return;
 249                         for (int i(0); i < MaxMonsters(); ++i) {
 250                                 if (MonsterAt(i).Health() > 0) {
 251                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 252                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 253                                         ts.SetBad(i, damage);
 254                                         break;
 255                                 }
 256                         }
 257                 } else {
 258                         for (int i(0); i < NumHeroes(); ++i) {
 259                                 if (ts.IsSelected(i)) {
 260                                         if (HeroAt(i).Health() > 0) {
 261                                                 const Stats &defenderStats(HeroAt(i).GetStats());
 262                                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 263                                                 ts.SetBad(i, damage);
 264                                                 hitSome = true;
 265                                         } else {
 266                                                 ts.Unselect(i);
 267                                         }
 268                                 }
 269                         }
 270                         if (hitSome) return;
 271                         for (int i(0); i < NumHeroes(); ++i) {
 272                                 if (HeroAt(i).Health() > 0) {
 273                                         const Stats &defenderStats(HeroAt(i).GetStats());
 274                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 275                                         ts.SetBad(i, damage);
 276                                         break;
 277                                 }
 278                         }
 279                 }
 280         }
 281 }
 282
 283 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 284         // TODO: find out real formula and add some randomness
 285         return attacker.Attack() / 2 - defender.Defense() / 4;
 286 }
 287
 288 void BattleState::ApplyDamage() {
 289         if (attackCursor < 0) return;
 290         AttackChoice &ac(CurrentAttack().isMonster ? monsterAttacks[CurrentAttack().index] : AttackChoiceAt(CurrentAttack().index));
 291         TargetSelection &ts(ac.Selection());
 292         if (ts.TargetsEnemies()) {
 293                 for (int i(0); i < MaxMonsters(); ++i) {
 294                         Monster &monster(MonsterAt(i));
 295                         if (ts.IsBad(i)) {
 296                                 monster.SubtractHealth(ts.GetAmount(i));
 297                                 if (monster.Health() == 0) {
 298                                         expReward += monster.ExpReward();
 299                                         goldReward += monster.GoldReward();
 300                                 }
 301                         }
 302                 }
 303         } else {
 304                 for (int i(0); i < NumHeroes(); ++i) {
 305                         Hero &hero(HeroAt(i));
 306                         if (ts.IsBad(i)) {
 307                                 hero.SubtractHealth(ts.GetAmount(i));
 308                         }
 309                 }
 310         }
 311 }
 312
 313 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 314         if (CurrentAttack().isMonster) {
 315                 return monsterAttacks[CurrentAttack().index];
 316         } else {
 317                 return AttackChoiceAt(CurrentAttack().index);
 318         }
 319 }
 320
 321 void BattleState::ClearAllAttacks() {
 322         attackCursor = -1;
 323         activeHero = -1;
 324         for (int i(0); i < numHeroes; ++i) {
 325                 heroes[i].GetAttackChoice() = AttackChoice(this);
 326         }
 327         attackOrder.clear();
 328         monsterAttacks.clear();
 329 }
 330
 331
 332 void BattleState::HandleEvents(const Input &input) {
 333
 334 }
 335
 336 void BattleState::UpdateWorld(float deltaT) {
 337
 338 }
 339
 340 void BattleState::Render(SDL_Surface *screen) {
 341         assert(screen);
 342         Vector<int> offset(CalculateScreenOffset(screen));
 343         RenderBackground(screen, offset);
 344         RenderMonsters(screen, offset);
 345 }
 346
 347 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 348         assert(screen);
 349         // black for now
 350         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 351         SDL_Rect destRect;
 352         destRect.x = offset.X();
 353         destRect.y = offset.Y();
 354         destRect.w = background->w;
 355         destRect.h = background->h;
 356         SDL_BlitSurface(background, 0, screen, &destRect);
 357 }
 358
 359 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 360         assert(screen);
 361         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 362                 if (MonsterPositionOccupied(i)) {
 363                         if (monsters[i].GetAnimation().Running()) {
 364                                 monsters[i].GetAnimation().DrawCenter(screen, monsterPositions[i] + offset);
 365                         } else {
 366                                 monsters[i].Sprite()->DrawCenter(screen, monsterPositions[i] + offset);
 367                         }
 368                 }
 369         }
 370 }
 371
 372 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 373         assert(screen);
 374         for (int i(0); i < numHeroes; ++i) {
 375                 if (heroes[i].GetAnimation().Running()) {
 376                         heroes[i].GetAnimation().DrawCenter(screen, heroesPositions[i] + offset);
 377                 } else {
 378                         int row(heroes[i].Health() > 0 ? 0 : 2);
 379                         heroes[i].Sprite()->DrawCenter(screen, heroesPositions[i] + offset, 1, row);
 380                 }
 381         }
 382 }
 383
 384 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 385         assert(screen);
 386         int tagHeight(attackTypeMenu.Height());
 387         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 388
 389         for (int i(0); i < numHeroes; ++i) {
 390                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 391         }
 392 }
 393
 394 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 395         assert(screen);
 396         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 397         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 398
 399         SDL_Rect rect;
 400         rect.x = offset.X();
 401         rect.y = offset.Y() + Height() - tagHeight;
 402         rect.w = Width();
 403         rect.h = tagHeight;
 404         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 405         rect.y += res->normalFont->CharHeight() / 8;
 406         rect.h -= res->normalFont->CharHeight() / 4;
 407         SDL_FillRect(screen, &rect, res->heroesBgColor);
 408
 409         for (int i(0); i < numHeroes; ++i) {
 410                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 411         }
 412 }
 413
 414 }