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                 // TODO: push victory state
 142                 ctrl.PopState();
 143                 return;
 144         }
 145         if (Defeat()) {
 146                 // TODO: push defeat state
 147                 ctrl.PopState();
 148                 return;
 149         }
 150         // TODO: this should not push a state while quitting
 151         if (AttackSelectionDone()) {
 152                 ctrl.PushState(new PerformAttacks(this));
 153         } else {
 154                 ctrl.PushState(new SelectMoveAction(this));
 155         }
 156 }
 157
 158 bool BattleState::Victory() const {
 159         for (int i(0); i < MaxMonsters(); ++i) {
 160                 if (MonsterAt(i).Health() > 0) return false;
 161         }
 162         return true;
 163 }
 164
 165 bool BattleState::Defeat() const {
 166         for (int i(0); i < NumHeroes(); ++i) {
 167                 if (HeroAt(i).Health() > 0) return false;
 168         }
 169         return true;
 170 }
 171
 172 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 173
 174 }
 175
 176
 177 class OrderCompare {
 178         public:
 179                 OrderCompare(BattleState *battle) : battle(battle) { }
 180                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 181                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 182                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 183                         return lagl > ragl;
 184                 }
 185         private:
 186                 BattleState *battle;
 187 };
 188
 189 void BattleState::CalculateAttackOrder() {
 190         attackOrder.reserve(monsters.size() + NumHeroes());
 191         for (int i(0); i < NumHeroes(); ++i) {
 192                 attackOrder.push_back(Order(i, false));
 193         }
 194         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 195                 attackOrder.push_back(Order(i, true));
 196                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 197         }
 198         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 199 }
 200
 201 void BattleState::NextAttack() {
 202         if (Victory() || Defeat()) {
 203                 attackCursor = attackOrder.size();
 204                 return;
 205         }
 206         ++attackCursor;
 207         while (attackCursor < int(attackOrder.size())) {
 208                 if (attackOrder[attackCursor].isMonster) {
 209                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 210                 } else {
 211                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 212                 }
 213                 ++attackCursor;
 214         }
 215 }
 216
 217 bool BattleState::AttacksFinished() const {
 218         return attackCursor >= int(attackOrder.size())
 219                         || Victory() || Defeat();
 220 }
 221
 222 void BattleState::CalculateDamage() {
 223         if (CurrentAttack().isMonster) {
 224                 DecideMonsterAttack(MonsterAt(CurrentAttack().index));
 225         }
 226         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 227         if (ac.GetType() == AttackChoice::DEFEND) return;
 228         TargetSelection &ts(ac.Selection());
 229
 230         // TODO: this only evaluates SWORD type attacks
 231         if (CurrentAttack().isMonster) {
 232                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 233                 CalculateDamage(attackerStats, ts);
 234         } else {
 235                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 236                 CalculateDamage(attackerStats, ts);
 237         }
 238 }
 239
 240 void BattleState::DecideMonsterAttack(Monster &m) const {
 241         AttackChoice &ac(m.GetAttackChoice());
 242         TargetSelection &ts(ac.Selection());
 243         ac.Reset();
 244         // TODO: run monster's attack script
 245         int target(rand() % NumHeroes());
 246         while (!HeroPositionOccupied(target)) {
 247                 target = rand() % NumHeroes();
 248         }
 249         ac.SetType(AttackChoice::SWORD);
 250         ts.SelectHeroes();
 251         ts.SetSingle();
 252         ts.Select(target);
 253 }
 254
 255 void BattleState::CalculateDamage(const Stats &attackerStats, TargetSelection &ts) const {
 256         bool hitSome(false);
 257         if (ts.TargetsMonsters()) {
 258                 for (int i(0); i < MaxMonsters(); ++i) {
 259                         if (ts.IsSelected(i)) {
 260                                 if (MonsterAt(i).Health() > 0) {
 261                                         const Stats &defenderStats(MonsterAt(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 < MaxMonsters(); ++i) {
 272                         if (MonsterAt(i).Health() > 0) {
 273                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 274                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 275                                 ts.SetBad(i, damage);
 276                                 break;
 277                         }
 278                 }
 279         } else {
 280                 for (int i(0); i < NumHeroes(); ++i) {
 281                         if (ts.IsSelected(i)) {
 282                                 if (HeroAt(i).Health() > 0) {
 283                                         const Stats &defenderStats(HeroAt(i).GetStats());
 284                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 285                                         ts.SetBad(i, damage);
 286                                         hitSome = true;
 287                                 } else {
 288                                         ts.Unselect(i);
 289                                 }
 290                         }
 291                 }
 292                 if (hitSome) return;
 293                 for (int i(0); i < NumHeroes(); ++i) {
 294                         if (HeroAt(i).Health() > 0) {
 295                                 const Stats &defenderStats(HeroAt(i).GetStats());
 296                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 297                                 ts.SetBad(i, damage);
 298                                 break;
 299                         }
 300                 }
 301         }
 302 }
 303
 304 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 305         // TODO: find out real formula and add some randomness
 306         return attacker.Attack() / 2 - defender.Defense() / 4;
 307 }
 308
 309 void BattleState::ApplyDamage() {
 310         if (attackCursor < 0) return;
 311         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 312         TargetSelection &ts(ac.Selection());
 313         if (ts.TargetsMonsters()) {
 314                 for (int i(0); i < MaxMonsters(); ++i) {
 315                         Monster &monster(MonsterAt(i));
 316                         if (ts.IsBad(i)) {
 317                                 monster.SubtractHealth(ts.GetAmount(i));
 318                                 if (monster.Health() == 0) {
 319                                         expReward += monster.ExpReward();
 320                                         goldReward += monster.GoldReward();
 321                                 }
 322                         }
 323                 }
 324         } else {
 325                 for (int i(0); i < NumHeroes(); ++i) {
 326                         Hero &hero(HeroAt(i));
 327                         if (ts.IsBad(i)) {
 328                                 hero.SubtractHealth(ts.GetAmount(i));
 329                         }
 330                 }
 331         }
 332 }
 333
 334 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 335         if (CurrentAttack().isMonster) {
 336                 return MonsterAt(CurrentAttack().index).GetAttackChoice();
 337         } else {
 338                 return HeroAt(CurrentAttack().index).GetAttackChoice();
 339         }
 340 }
 341
 342 void BattleState::ClearAllAttacks() {
 343         attackCursor = -1;
 344         activeHero = -1;
 345         for (int i(0); i < NumHeroes(); ++i) {
 346                 HeroAt(i).GetAttackChoice() = AttackChoice(this);
 347         }
 348         for (int i(0); i < MaxMonsters(); ++i) {
 349                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 350         }
 351         attackOrder.clear();
 352 }
 353
 354
 355 void BattleState::HandleEvents(const Input &input) {
 356
 357 }
 358
 359 void BattleState::UpdateWorld(float deltaT) {
 360
 361 }
 362
 363 void BattleState::Render(SDL_Surface *screen) {
 364         assert(screen);
 365         Vector<int> offset(CalculateScreenOffset(screen));
 366         RenderBackground(screen, offset);
 367         RenderMonsters(screen, offset);
 368 }
 369
 370 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 371         assert(screen);
 372         // black for now
 373         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 374         SDL_Rect destRect;
 375         destRect.x = offset.X();
 376         destRect.y = offset.Y();
 377         destRect.w = background->w;
 378         destRect.h = background->h;
 379         SDL_BlitSurface(background, 0, screen, &destRect);
 380 }
 381
 382 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 383         assert(screen);
 384         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 385                 if (MonsterPositionOccupied(i)) {
 386                         if (monsters[i].GetAnimation().Running()) {
 387                                 monsters[i].GetAnimation().DrawCenter(screen, monsters[i].Position() + offset);
 388                         } else {
 389                                 monsters[i].Sprite()->DrawCenter(screen, monsters[i].Position() + offset);
 390                         }
 391                 }
 392         }
 393 }
 394
 395 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 396         assert(screen);
 397         for (int i(0); i < numHeroes; ++i) {
 398                 if (heroes[i].GetAnimation().Running()) {
 399                         heroes[i].GetAnimation().DrawCenter(screen, heroes[i].Position() + offset);
 400                 } else {
 401                         int row(heroes[i].Health() > 0 ? 0 : 2);
 402                         heroes[i].Sprite()->DrawCenter(screen, heroes[i].Position() + offset, 1, row);
 403                 }
 404         }
 405 }
 406
 407 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 408         assert(screen);
 409         int tagHeight(attackTypeMenu.Height());
 410         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 411
 412         for (int i(0); i < numHeroes; ++i) {
 413                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 414         }
 415 }
 416
 417 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 418         assert(screen);
 419         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 420         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 421
 422         SDL_Rect rect;
 423         rect.x = offset.X();
 424         rect.y = offset.Y() + Height() - tagHeight;
 425         rect.w = Width();
 426         rect.h = tagHeight;
 427         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 428         rect.y += res->normalFont->CharHeight() / 8;
 429         rect.h -= res->normalFont->CharHeight() / 4;
 430         SDL_FillRect(screen, &rect, res->heroesBgColor);
 431
 432         for (int i(0); i < numHeroes; ++i) {
 433                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 434         }
 435 }
 436
 437 }