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 <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 geometry::Point;
  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::Resize(int w, int h) {
  78
  79 }
  80
  81
  82 void BattleState::EnterState(Application &ctrl, 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->spellMenuPrototype;
  86                 heroes[i].UpdateSpellMenu();
  87                 heroes[i].IkariMenu() = res->ikariMenuPrototype;
  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] = Point<int>(xOffset, Height() - 2 * tagHeight);
 101         heroTagPositions[1] = Point<int>(xOffset + tagWidth, Height() - 2 * tagHeight);
 102         heroTagPositions[2] = Point<int>(xOffset, Height() - tagHeight);
 103         heroTagPositions[3] = Point<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] = Point<int>(xOffset, yOffset);
 110         smallHeroTagPositions[1] = Point<int>(xOffset + 2 * tagWidth, yOffset);
 111         smallHeroTagPositions[2] = Point<int>(xOffset + tagWidth, yOffset);
 112         smallHeroTagPositions[3] = Point<int>(xOffset + 3 * tagWidth, yOffset);
 113
 114         itemMenu = res->itemMenuPrototype;
 115         LoadInventory();
 116 }
 117
 118 void BattleState::LoadInventory() {
 119         const Inventory &inv(*res->inventory);
 120         itemMenu.Clear();
 121         itemMenu.Reserve(inv.MaxItems());
 122         for (int i(0); i < inv.MaxItems(); ++i) {
 123                 const Item *item(inv.ItemAt(i));
 124                 if (item) {
 125                         itemMenu.Add(item->Name(), item, item->CanUseInBattle(), item->MenuIcon(), inv.ItemCountAt(i));
 126                 } else {
 127                         itemMenu.AddEmptyEntry();
 128                 }
 129         }
 130         ClearAllAttacks();
 131 }
 132
 133 void BattleState::ExitState(Application &ctrl, SDL_Surface *screen) {
 134
 135 }
 136
 137 void BattleState::ResumeState(Application &ctrl, SDL_Surface *screen) {
 138         if (ranAway) {
 139                 ctrl.PopState(); // quit the battle scene
 140                 return;
 141         }
 142         if (Victory()) {
 143                 // TODO: push victory state
 144                 ctrl.PopState();
 145                 return;
 146         }
 147         if (Defeat()) {
 148                 // TODO: push defeat state
 149                 ctrl.PopState();
 150                 return;
 151         }
 152         // TODO: this should not push a state while quitting
 153         if (AttackSelectionDone()) {
 154                 ctrl.PushState(new PerformAttacks(this));
 155         } else {
 156                 ctrl.PushState(new SelectMoveAction(this));
 157         }
 158 }
 159
 160 bool BattleState::Victory() const {
 161         for (int i(0); i < MaxMonsters(); ++i) {
 162                 if (MonsterAt(i).Health() > 0) return false;
 163         }
 164         return true;
 165 }
 166
 167 bool BattleState::Defeat() const {
 168         for (int i(0); i < NumHeroes(); ++i) {
 169                 if (HeroAt(i).Health() > 0) return false;
 170         }
 171         return true;
 172 }
 173
 174 void BattleState::PauseState(Application &ctrl, SDL_Surface *screen) {
 175
 176 }
 177
 178
 179 class OrderCompare {
 180         public:
 181                 OrderCompare(BattleState *battle) : battle(battle) { }
 182                 bool operator ()(const BattleState::Order &lhs, const BattleState::Order &rhs) {
 183                         int lagl(lhs.isMonster ? battle->MonsterAt(lhs.index).GetStats().Agility() : battle->HeroAt(lhs.index).GetStats().Agility());
 184                         int ragl(rhs.isMonster ? battle->MonsterAt(rhs.index).GetStats().Agility() : battle->HeroAt(rhs.index).GetStats().Agility());
 185                         return lagl > ragl;
 186                 }
 187         private:
 188                 BattleState *battle;
 189 };
 190
 191 void BattleState::CalculateAttackOrder() {
 192         attackOrder.reserve(monsters.size() + NumHeroes());
 193         for (int i(0); i < NumHeroes(); ++i) {
 194                 attackOrder.push_back(Order(i, false));
 195         }
 196         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 197                 attackOrder.push_back(Order(i, true));
 198                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 199         }
 200         std::sort(attackOrder.begin(), attackOrder.end(), OrderCompare(this));
 201 }
 202
 203 void BattleState::NextAttack() {
 204         if (Victory() || Defeat()) {
 205                 attackCursor = attackOrder.size();
 206                 return;
 207         }
 208         ++attackCursor;
 209         while (attackCursor < int(attackOrder.size())) {
 210                 if (attackOrder[attackCursor].isMonster) {
 211                         if (MonsterAt(attackOrder[attackCursor].index).Health() > 0) break;
 212                 } else {
 213                         if (HeroAt(attackOrder[attackCursor].index).Health() > 0) break;
 214                 }
 215                 ++attackCursor;
 216         }
 217 }
 218
 219 bool BattleState::AttacksFinished() const {
 220         return attackCursor >= int(attackOrder.size())
 221                         || Victory() || Defeat();
 222 }
 223
 224 void BattleState::CalculateDamage() {
 225         if (CurrentAttack().isMonster) {
 226                 DecideMonsterAttack(MonsterAt(CurrentAttack().index));
 227         }
 228         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 229         if (ac.GetType() == AttackChoice::DEFEND) return;
 230         TargetSelection &ts(ac.Selection());
 231
 232         // TODO: this only evaluates SWORD type attacks
 233         if (CurrentAttack().isMonster) {
 234                 const Stats &attackerStats(MonsterAt(CurrentAttack().index).GetStats());
 235                 CalculateDamage(attackerStats, ts);
 236         } else {
 237                 const Stats &attackerStats(HeroAt(CurrentAttack().index).GetStats());
 238                 CalculateDamage(attackerStats, ts);
 239         }
 240 }
 241
 242 void BattleState::DecideMonsterAttack(Monster &m) const {
 243         AttackChoice &ac(m.GetAttackChoice());
 244         TargetSelection &ts(ac.Selection());
 245         ac.Reset();
 246         // TODO: run monster's attack script
 247         int target(rand() % NumHeroes());
 248         while (!HeroPositionOccupied(target)) {
 249                 target = rand() % NumHeroes();
 250         }
 251         ac.SetType(AttackChoice::SWORD);
 252         ts.SelectHeroes();
 253         ts.SetSingle();
 254         ts.Select(target);
 255 }
 256
 257 void BattleState::CalculateDamage(const Stats &attackerStats, TargetSelection &ts) const {
 258         bool hitSome(false);
 259         if (ts.TargetsMonsters()) {
 260                 for (int i(0); i < MaxMonsters(); ++i) {
 261                         if (ts.IsSelected(i)) {
 262                                 if (MonsterAt(i).Health() > 0) {
 263                                         const Stats &defenderStats(MonsterAt(i).GetStats());
 264                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 265                                         ts.SetBad(i, damage);
 266                                         hitSome = true;
 267                                 } else {
 268                                         ts.Unselect(i);
 269                                 }
 270                         }
 271                 }
 272                 if (hitSome) return;
 273                 for (int i(0); i < MaxMonsters(); ++i) {
 274                         if (MonsterAt(i).Health() > 0) {
 275                                 const Stats &defenderStats(MonsterAt(i).GetStats());
 276                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 277                                 ts.SetBad(i, damage);
 278                                 break;
 279                         }
 280                 }
 281         } else {
 282                 for (int i(0); i < NumHeroes(); ++i) {
 283                         if (ts.IsSelected(i)) {
 284                                 if (HeroAt(i).Health() > 0) {
 285                                         const Stats &defenderStats(HeroAt(i).GetStats());
 286                                         Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 287                                         ts.SetBad(i, damage);
 288                                         hitSome = true;
 289                                 } else {
 290                                         ts.Unselect(i);
 291                                 }
 292                         }
 293                 }
 294                 if (hitSome) return;
 295                 for (int i(0); i < NumHeroes(); ++i) {
 296                         if (HeroAt(i).Health() > 0) {
 297                                 const Stats &defenderStats(HeroAt(i).GetStats());
 298                                 Uint16 damage(CalculateDamage(attackerStats, defenderStats));
 299                                 ts.SetBad(i, damage);
 300                                 break;
 301                         }
 302                 }
 303         }
 304 }
 305
 306 Uint16 BattleState::CalculateDamage(const Stats &attacker, const Stats &defender) const {
 307         // TODO: find out real formula and add some randomness
 308         return attacker.Attack() / 2 - defender.Defense() / 4;
 309 }
 310
 311 void BattleState::ApplyDamage() {
 312         if (attackCursor < 0) return;
 313         AttackChoice &ac(CurrentAttack().isMonster ? MonsterAt(CurrentAttack().index).GetAttackChoice() : HeroAt(CurrentAttack().index).GetAttackChoice());
 314         TargetSelection &ts(ac.Selection());
 315         if (ts.TargetsMonsters()) {
 316                 for (int i(0); i < MaxMonsters(); ++i) {
 317                         Monster &monster(MonsterAt(i));
 318                         if (ts.IsBad(i)) {
 319                                 monster.SubtractHealth(ts.GetAmount(i));
 320                                 if (monster.Health() == 0) {
 321                                         expReward += monster.ExpReward();
 322                                         goldReward += monster.GoldReward();
 323                                 }
 324                         }
 325                 }
 326         } else {
 327                 for (int i(0); i < NumHeroes(); ++i) {
 328                         Hero &hero(HeroAt(i));
 329                         if (ts.IsBad(i)) {
 330                                 hero.SubtractHealth(ts.GetAmount(i));
 331                         }
 332                 }
 333         }
 334 }
 335
 336 AttackChoice &BattleState::CurrentAttackAttackChoice() {
 337         if (CurrentAttack().isMonster) {
 338                 return MonsterAt(CurrentAttack().index).GetAttackChoice();
 339         } else {
 340                 return HeroAt(CurrentAttack().index).GetAttackChoice();
 341         }
 342 }
 343
 344 void BattleState::ClearAllAttacks() {
 345         attackCursor = -1;
 346         activeHero = -1;
 347         for (int i(0); i < NumHeroes(); ++i) {
 348                 HeroAt(i).GetAttackChoice() = AttackChoice(this);
 349         }
 350         for (int i(0); i < MaxMonsters(); ++i) {
 351                 MonsterAt(i).GetAttackChoice() = AttackChoice(this);
 352         }
 353         attackOrder.clear();
 354 }
 355
 356
 357 void BattleState::HandleEvents(const Input &input) {
 358
 359 }
 360
 361 void BattleState::UpdateWorld(float deltaT) {
 362
 363 }
 364
 365 void BattleState::Render(SDL_Surface *screen) {
 366         assert(screen);
 367         Vector<int> offset(CalculateScreenOffset(screen));
 368         RenderBackground(screen, offset);
 369         RenderMonsters(screen, offset);
 370 }
 371
 372 void BattleState::RenderBackground(SDL_Surface *screen, const Vector<int> &offset) {
 373         assert(screen);
 374         // black for now
 375         SDL_FillRect(screen, 0, SDL_MapRGB(screen->format, 0, 0, 0));
 376         SDL_Rect destRect;
 377         destRect.x = offset.X();
 378         destRect.y = offset.Y();
 379         destRect.w = background->w;
 380         destRect.h = background->h;
 381         SDL_BlitSurface(background, 0, screen, &destRect);
 382 }
 383
 384 void BattleState::RenderMonsters(SDL_Surface *screen, const Vector<int> &offset) {
 385         assert(screen);
 386         for (vector<Monster>::size_type i(0), end(monsters.size()); i < end; ++i) {
 387                 if (MonsterPositionOccupied(i)) {
 388                         if (monsters[i].GetAnimation().Running()) {
 389                                 monsters[i].GetAnimation().DrawCenter(screen, monsters[i].Position() + offset);
 390                         } else {
 391                                 monsters[i].Sprite()->DrawCenter(screen, monsters[i].Position() + offset);
 392                         }
 393                 }
 394         }
 395 }
 396
 397 void BattleState::RenderHeroes(SDL_Surface *screen, const Vector<int> &offset) {
 398         assert(screen);
 399         for (int i(0); i < numHeroes; ++i) {
 400                 if (heroes[i].GetAnimation().Running()) {
 401                         heroes[i].GetAnimation().DrawCenter(screen, heroes[i].Position() + offset);
 402                 } else {
 403                         int row(heroes[i].Health() > 0 ? 0 : 2);
 404                         heroes[i].Sprite()->DrawCenter(screen, heroes[i].Position() + offset, 1, row);
 405                 }
 406         }
 407 }
 408
 409 void BattleState::RenderHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 410         assert(screen);
 411         int tagHeight(attackTypeMenu.Height());
 412         int tagWidth(attackTypeMenu.Width() * 2 + attackTypeMenu.Width() / 2);
 413
 414         for (int i(0); i < numHeroes; ++i) {
 415                 heroTags[i].Render(screen, tagWidth, tagHeight, heroTagPositions[i] + offset, (int)i == activeHero);
 416         }
 417 }
 418
 419 void BattleState::RenderSmallHeroTags(SDL_Surface *screen, const Vector<int> &offset) {
 420         assert(screen);
 421         int tagHeight(res->normalFont->CharHeight() * 4 + res->smallHeroTagFrame->BorderHeight() * 2);
 422         int tagWidth(res->normalFont->CharWidth() * 6 + res->smallHeroTagFrame->BorderWidth() * 2);
 423
 424         SDL_Rect rect;
 425         rect.x = offset.X();
 426         rect.y = offset.Y() + Height() - tagHeight;
 427         rect.w = Width();
 428         rect.h = tagHeight;
 429         SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 430         rect.y += res->normalFont->CharHeight() / 8;
 431         rect.h -= res->normalFont->CharHeight() / 4;
 432         SDL_FillRect(screen, &rect, res->heroesBgColor);
 433
 434         for (int i(0); i < numHeroes; ++i) {
 435                 smallHeroTags[i].Render(screen, tagWidth, tagHeight, smallHeroTagPositions[i] + offset);
 436         }
 437 }
 438
 439 }