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/GameState.h"
  16 #include "../common/Ikari.h"
  17 #include "../common/Inventory.h"
  18 #include "../common/Item.h"
  19 #include "../common/Spell.h"
  20 #include "../graphics/Frame.h"
  21 #include "../graphics/Sprite.h"
  22
  23 #include <algorithm>
  24 #include <cassert>
  25 #include <cstdlib>
  26 #include <stdexcept>
  27
  28 using app::Application;
  29 using app::Input;
  30 using common::Inventory;
  31 using common::Item;
  32 using common::Spell;
  33 using common::Stats;
  34 using geometry::Vector;
  35 using graphics::Menu;
  36
  37 using std::rand;
  38 using std::vector;
  39
  40 namespace battle {
  41
  42 void BattleState::AddMonster(const Monster &m) {
  43         if (monsters.size() >= monstersLayout->NumPositions()) {
  44                 throw std::overflow_error("too many monsters for layout");
  45         }
  46         monsters.push_back(m);
  47 }
  48
  49 void BattleState::AddHero(const Hero &h) {
  50         if (numHeroes >= 4 || numHeroes >= (int)heroesLayout->NumPositions()) {
  51                 throw std::overflow_error("too many heroes for layout");
  52         }
  53         heroes[numHeroes] = h;
  54         ++numHeroes;
  55 }
  56
  57 void BattleState::NextHero() {
  58         ++activeHero;
  59         while (activeHero < numHeroes && heroes[activeHero].Health() == 0) {
  60                 ++activeHero;
  61         }
  62 }
  63
  64 void BattleState::PreviousHero() {
  65         --activeHero;
  66         while (activeHero >= 0 && heroes[activeHero].Health() == 0) {
  67                 --activeHero;
  68         }
  69 }
  70
  71 void BattleState::SwapHeroes(int lhs, int rhs) {
  72         if (lhs < 0 || lhs >= numHeroes || rhs < 0 || rhs >= numHeroes || lhs == rhs) return;
  73         std::swap(heroes[lhs], heroes[rhs]);
  74 }
  75
  76
  77 void BattleState::OnResize(int w, int h) {
  78
  79 }
  80
  81
  82 void BattleState::OnEnterState(SDL_Surface *screen) {
  83         for (int i(0); i < 4; ++i) {
  84                 heroes[i].Position() = heroesLayout->CalculatePosition(i, background->w, background->h);
  85                 heroes[i].SpellMenu() = *res->spellMenuProperties;
  86                 heroes[i].UpdateSpellMenu();
  87                 heroes[i].IkariMenu() = *res->ikariMenuProperties;
  88                 heroes[i].UpdateIkariMenu(res);
  89                 heroTags[i] = HeroTag(this, i);
  90                 smallHeroTags[i] = SmallHeroTag(this, i);
  91         }
  92
  93         for (int i(0); i < int(monsters.size()); ++i) {
  94                 monsters[i].Position() = monstersLayout->CalculatePosition(i, background->w, background->h);
  95         }
  96
  97         int tagHeight(attackTypeMenu.Height());
  98         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
  99         int xOffset((Width() - 2 * tagWidth) / 2);
 100         heroTagPositions[0] = Vector<int>(xOffset, Height() - 2 * tagHeight);
 101         heroTagPositions[1] = Vector<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
 102         heroTagPositions[2] = Vector<int>(xOffset, Height() - tagHeight);
 103         heroTagPositions[3] = Vector<int>(xOffset + tagWidth, Height() - tagHeight);
 104
 105         tagHeight = res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2;
 106         tagWidth = res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2;
 107         xOffset = (Width() - 4 * tagWidth) / 2;
 108         int yOffset(Height() - tagHeight);
 109         smallHeroTagPositions[0] = Vector<int>(xOffset, yOffset);
 110         smallHeroTagPositions[1] = Vector<int>(xOffset + 2 * tagWidth, yOffset);
 111         smallHeroTagPositions[2] = Vector<int>(xOffset + tagWidth, yOffset);
 112         smallHeroTagPositions[3] = Vector<int>(xOffset + 3 * tagWidth, yOffset);
 113
 114         itemMenu = *res->itemMenuProperties;
 115         LoadInventory();
 116         ClearAllAttacks();
 117 }
 118
 119 void BattleState::LoadInventory() {
 120         const Inventory &inv(game->state->inventory);
 121         itemMenu.Clear();
 122         itemMenu.Reserve(inv.MaxItems());
 123         for (int i(0); i < inv.MaxItems(); ++i) {
 124                 const Item *item(inv.ItemAt(i));
 125                 if (item) {
 126                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 127                 } else {
 128                         itemMenu.AddEmptyEntry();
 129                 }
 130         }
 131 }
 132
 133 void BattleState::OnExitState(SDL_Surface *screen) {
 134
 135 }
 136
 137 void BattleState::OnResumeState(SDL_Surface *screen) {
 138         if (ranAway) {
 139                 Ctrl().PopState(); // quit the battle scene
 140                 return;
 141         }
 142         if (Victory()) {
 143                 Ctrl().PopState();
 144                 return;
 145         }
 146         if (Defeat()) {
 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::OnPauseState(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         if (CurrentAttack().isMonster) {
 231                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 232                 CalculateDamage(attackerStats, ts);
 233         } else {
 234                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 235                 CalculateDamage(attackerStats, ts);
 236         }
 237 }
 238
 239 void BattleState::DecideMonsterAttack(Monster &m) const {
 240         AttackChoice &ac(m.GetAttackChoice());
 241         TargetSelection &ts(ac.Selection());
 242         ac.Reset();
 243         int target(rand() % NumHeroes());
 244         while (!HeroPositionOccupied(target)) {
 245                 target = rand() % NumHeroes();
 246         }
 247         ac.SetType(AttackChoice::SWORD);
 248         ts.SelectHeroes();
 249         ts.SetSingle();
 250         ts.Select(target);
 251 }
 252
 253 void BattleState::CalculateDamage(const Stats &attackerStats, TargetSelection &ts) const {
 254         bool hitSome(false);
 255         if (ts.TargetsMonsters()) {
 256                 for (int i(0); i < MaxMonsters(); ++i) {
 257                         if (ts.IsSelected(i)) {
 258                                 if (MonsterAt(i).Health() > 0) {
 259                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 260                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 261                                         ts.SetBad(i, damage);
 262                                         hitSome = true;
 263                                 } else {
 264                                         ts.Unselect(i);
 265                                 }
 266                         }
 267                 }
 268                 if (hitSome) return;
 269                 for (int i(0); i < MaxMonsters(); ++i) {
 270                         if (MonsterAt(i).Health() > 0) {
 271                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 272                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 273                                 ts.SetBad(i, damage);
 274                                 break;
 275                         }
 276                 }
 277         } else {
 278                 for (int i(0); i < NumHeroes(); ++i) {
 279                         if (ts.IsSelected(i)) {
 280                                 if (HeroAt(i).Health() > 0) {
 281                                         const Stats &defenderStats(HeroAt(i).GetStats());
 282                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 283                                         ts.SetBad(i, damage);
 284                                         hitSome = true;
 285                                 } else {
 286                                         ts.Unselect(i);
 287                                 }
 288                         }
 289                 }
 290                 if (hitSome) return;
 291                 for (int i(0); i < NumHeroes(); ++i) {
 292                         if (HeroAt(i).Health() > 0) {
 293                                 const Stats &defenderStats(HeroAt(i).GetStats());
 294                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 295                                 ts.SetBad(i, damage);
 296                                 break;
 297                         }
 298                 }
 299         }
 300 }
 301
 302 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 303         return attacker.Attack() / 2 - defender.Defense() / 4;
 304 }
 305
 306 void BattleState::ApplyDamage() {
 307         if (attackCursor < 0) return;
 308         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 309         TargetSelection &ts(ac.Selection());
 310         if (ts.TargetsMonsters()) {
 311                 for (int i(0); i < MaxMonsters(); ++i) {
 312                         Monster &monster(MonsterAt(i));
 313                         if (ts.IsBad(i)) {
 314                                 monster.SubtractHealth(ts.GetAmount(i));
 315                                 if (monster.Health() == 0) {
 316                                         expReward += monster.ExpReward();
 317                                         goldReward += monster.GoldReward();
 318                                 }
 319                         }
 320                 }
 321         } else {
 322                 for (int i(0); i < NumHeroes(); ++i) {
 323                         Hero &hero(HeroAt(i));
 324                         if (ts.IsBad(i)) {
 325                                 hero.SubtractHealth(ts.GetAmount(i));
 326                         }
 327                 }
 328         }
 329 }
 330
 331 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 332         if (CurrentAttack().isMonster) {
 333                 return MonsterAt(CurrentAttack().index).GetAttackChoice();
 334         } else {
 335                 return HeroAt(CurrentAttack().index).GetAttackChoice();
 336         }
 337 }
 338
 339 void BattleState::ClearAllAttacks() {
 340         attackCursor = -1;
 341         activeHero = -1;
 342         for (int i(0); i < NumHeroes(); ++i) {
 343                 HeroAt(i).GetAttackChoice() = AttackChoice(this);
 344         }
 345         for (int i(0); i < MaxMonsters(); ++i) {
 346                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 347         }
 348         attackOrder.clear();
 349 }
 350
 351
 352 void BattleState::HandleEvents(const Input &input) {
 353
 354 }
 355
 356 void BattleState::UpdateWorld(float deltaT) {
 357
 358 }
 359
 360 void BattleState::Render(SDL_Surface *screen) {
 361         assert(screen);
 362         Vector<int> offset(CalculateScreenOffset(screen));
 363         RenderBackground(screen, offset);
 364         RenderMonsters(screen, offset);
 365 }
 366
 367 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 368         assert(screen);
 369         // black for now
 370         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 371         SDL_Rect destRect;
 372         destRect.x = offset.X();
 373         destRect.y = offset.Y();
 374         destRect.w = background->w;
 375         destRect.h = background->h;
 376         SDL_BlitSurface(background, 0, screen, &destRect);
 377 }
 378
 379 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 380         assert(screen);
 381         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 382                 if (MonsterPositionOccupied(i)) {
 383                         if (monsters[i].GetAnimation().Running()) {
 384                                 monsters[i].GetAnimation().DrawCenter(screen, monsters[i].Position() + offset);
 385                         } else {
 386                                 monsters[i].Sprite()->DrawCenter(screen, monsters[i].Position() + offset);
 387                         }
 388                 }
 389         }
 390 }
 391
 392 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 393         assert(screen);
 394         for (int i(0); i < numHeroes; ++i) {
 395                 if (heroes[i].GetAnimation().Running()) {
 396                         heroes[i].GetAnimation().DrawCenter(screen, heroes[i].Position() + offset);
 397                 } else {
 398                         int row(heroes[i].Health() > 0 ? 0 : 2);
 399                         heroes[i].Sprite()->DrawCenter(screen, heroes[i].Position() + offset, 1, row);
 400                 }
 401         }
 402 }
 403
 404 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 405         assert(screen);
 406         int tagHeight(attackTypeMenu.Height());
 407         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 408
 409         for (int i(0); i < numHeroes; ++i) {
 410                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 411         }
 412 }
 413
 414 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 415         assert(screen);
 416         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 417         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 418
 419         SDL_Rect rect;
 420         rect.x = offset.X();
 421         rect.y = offset.Y() + Height() - tagHeight;
 422         rect.w = Width();
 423         rect.h = tagHeight;
 424         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 425         rect.y += res->normalFont->CharHeight() / 8;
 426         rect.h -= res->normalFont->CharHeight() / 4;
 427         SDL_FillRect(screen, &rect, res->heroesBgColor.MapRGB(screen->format));
 428
 429         for (int i(0); i < numHeroes; ++i) {
 430                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 431         }
 432 }
 433
 434 }