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scene_v2.cpp

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/kyra/scene_v2.cpp $
 * $Id: scene_v2.cpp 30944 2008-02-23 22:50:18Z sev $
 *
 */
 
#include "kyra/kyra_v2.h"
#include "kyra/screen_v2.h"
#include "kyra/sound.h"
#include "kyra/wsamovie.h"

#include "common/func.h"

namespace Kyra {

void KyraEngine_v2::enterNewScene(uint16 newScene, int facing, int unk1, int unk2, int unk3) {
      if (_newChapterFile != _currentTalkFile) {
            _currentTalkFile = _newChapterFile;
            showMessageFromCCode(265, 150, 0);
            _screen->updateScreen();
            openTalkFile(_currentTalkFile);
            showMessage(0, 207);
            _screen->updateScreen();
      }

      _screen->hideMouse();
      
      if (!unk3) {
            //updateSpecialItems();
            //displayInvWsaLastFrame();
      }
      
      if (unk1) {
            int x = _mainCharacter.x1;
            int y = _mainCharacter.y1;

            switch (facing) {
            case 0:
                  y -= 6;
                  break;

            case 2:
                  x = 335;
                  break;

            case 4:
                  y = 147;
                  break;

            case 6:
                  x = -16;
                  break;
            
            default:
                  break;
            }
            
            moveCharacter(facing, x, y);
      }
      
      bool newSoundFile = false;
      if (_sceneList[newScene].sound != _lastMusicCommand) {
            newSoundFile = true;
            //XXX
            _sound->beginFadeOut();
      }
      
      _unkFlag1 = false;
      
      if (!unk3) {
            _scriptInterpreter->initScript(&_sceneScriptState, &_sceneScriptData);
            _scriptInterpreter->startScript(&_sceneScriptState, 5);
            while (_scriptInterpreter->validScript(&_sceneScriptState))
                  _scriptInterpreter->runScript(&_sceneScriptState);
      }
      
      Common::for_each(_wsaSlots, _wsaSlots+ARRAYSIZE(_wsaSlots), Common::mem_fun(&WSAMovieV2::close));
      _specialExitCount = 0;
      memset(_specialExitTable, -1, sizeof(_specialExitTable));
      
      _mainCharacter.sceneId = newScene;
      _sceneList[newScene].flags &= ~1;
      loadScenePal();
      unloadScene();
      loadSceneMsc();
      
      SceneDesc &scene = _sceneList[newScene];
      _sceneExit1 = scene.exit1;
      _sceneExit2 = scene.exit2;
      _sceneExit3 = scene.exit3;
      _sceneExit4 = scene.exit4;
      
      if (newSoundFile) {
            //XXX while (snd_isPlaying()) ;
            snd_loadSoundFile(_sceneList[newScene].sound);
      }
      
      startSceneScript(unk3);
      
      if (_overwriteSceneFacing) {
            facing = _mainCharacter.facing;
            _overwriteSceneFacing = false;
      }
      
      enterNewSceneUnk1(facing, unk2, unk3);
      
      setTimer1DelaySecs(-1);
      _sceneScriptState.regs[3] = 1;
      enterNewSceneUnk2(unk3);
      _screen->showMouse();
      _unk5 = 0;
      setNextIdleAnimTimer();

      _currentScene = newScene;
}

void KyraEngine_v2::enterNewSceneUnk1(int facing, int unk1, int unk2) {
      int x = 0, y = 0;
      int x2 = 0, y2 = 0;
      bool needProc = true;
      
      if (_mainCharX == -1 && _mainCharY == -1) {
            switch (facing+1) {
            case 1: case 2: case 8:
                  x2 = _sceneEnterX3;
                  y2 = _sceneEnterY3;
                  break;
            
            case 3:
                  x2 = _sceneEnterX4;
                  y2 = _sceneEnterY4;
                  break;
            
            case 4: case 5: case 6:
                  x2 = _sceneEnterX1;
                  y2 = _sceneEnterY1;
                  break;
            
            case 7:
                  x2 = _sceneEnterX2;
                  y2 = _sceneEnterY2;
                  break;
            
            default:
                  x2 = y2 = -1;
                  break;
            }
            
            if (x2 >= 316)
                  x2 = 312;
            if (y2 >= 141)
                  y2 = 139;
            if (x2 <= 4)
                  x2 = 8;
      }
      
      if (_mainCharX >= 0) {
            x = x2 = _mainCharX;
            needProc = false;
      }
      
      if (_mainCharY >= 0) {
            y = y2 = _mainCharY;
            needProc = false;
      }
      
      _mainCharX = _mainCharY = -1;
      
      if (unk1 && needProc) {
            x = x2;
            y = y2;
            
            switch (facing) {
            case 0:
                  y2 = 147;
                  break;
            
            case 2:
                  x2 = -16;
                  break;
            
            case 4:
                  y2 = y - 4;
                  break;
            
            case 6:
                  x2 = 335;
                  break;
                  
            default:
                  break;
            }
      }
      
      x2 &= ~3;
      x &= ~3;
      y2 &= ~1;
      y &= ~1;

      _mainCharacter.facing = facing;
      _mainCharacter.x1 = _mainCharacter.x2 = x2;
      _mainCharacter.y1 = _mainCharacter.y2 = y2;
      initSceneAnims(unk2);
      
      if (!unk2)
            snd_playWanderScoreViaMap(_sceneList[_mainCharacter.sceneId].sound, 0);
      
      if (unk1 && !unk2 && _mainCharacter.animFrame != 32)
            moveCharacter(facing, x, y);
}

void KyraEngine_v2::enterNewSceneUnk2(int unk1) {
      _unk3 = -1;
      
      if (_mainCharX == -1 && _mainCharY == -1 && _mainCharacter.sceneId != 61 &&
            !queryGameFlag(0x1F1) && !queryGameFlag(0x192) && !queryGameFlag(0x193) &&
            _mainCharacter.sceneId != 70 && !queryGameFlag(0x159) && _mainCharacter.sceneId != 37) {
            _mainCharacter.animFrame = _characterFrameTable[_mainCharacter.facing];
            updateCharacterAnim(0);
            refreshAnimObjectsIfNeed();
      }
      
      if (!unk1) {
            runSceneScript4(0);
            //XXX sub_27158
      }
      
      _unk4 = 0;
      _unk3 = -1;
}

int KyraEngine_v2::trySceneChange(int *moveTable, int unk1, int updateChar) {
      bool running = true;
      bool unkFlag = false;
      int8 updateType = -1;
      int changedScene = 0;
      const int *moveTableStart = moveTable;
      _unk4 = 0;
      while (running && !_quitFlag) {
            if (*moveTable >= 0 && *moveTable <= 7) {
                  _mainCharacter.facing = getOppositeFacingDirection(*moveTable);
                  unkFlag = true;
            } else {
                  if (*moveTable == 8) {
                        running = false;
                  } else {
                        ++moveTable;
                        unkFlag = false;
                  }
            }
            
            if (checkSceneChange()) {
                  running = false;
                  changedScene = 1;
            }
            
            if (unk1) {
                  // TODO: check this again
                  int inputFlag = checkInput(0/*dword_324C5*/);
                  if (inputFlag == 198 || inputFlag == 199) {
                        running = false;
                        _unk4 = 1;
                  }
            }
            
            if (!unkFlag || !running)
                  continue;

            int ret = 0;
            if (moveTable == moveTableStart || moveTable[1] == 8)
                  ret = updateCharPos(0);
            else
                  ret = updateCharPos(moveTable);

            if (ret)
                  ++moveTable;

            ++updateType;
            if (!updateType) {
                  update();
            } else if (updateType == 1) {
                  refreshAnimObjectsIfNeed();
                  updateType = -1;
            }
      }
      
      if (updateChar)
            _mainCharacter.animFrame = _characterFrameTable[_mainCharacter.facing];
      
      updateCharacterAnim(0);
      refreshAnimObjectsIfNeed();
      
      if (!changedScene && !_unk4) {
            //XXX
      }
      return changedScene;
}

int KyraEngine_v2::checkSceneChange() {
      SceneDesc &curScene = _sceneList[_mainCharacter.sceneId];
      int charX = _mainCharacter.x1, charY = _mainCharacter.y1;
      int facing = 0;
      int process = 0;
      
      if (_screen->getLayer(charX, charY) == 1 && _unk3 == -6) {
            facing = 0;
            process = 1;
      } else if (charX >= 316 && _unk3 == -5) {
            facing = 2;
            process = 1;
      } else if (charY >= 142 && _unk3 == -4) {
            facing = 4;
            process = 1;
      } else if (charX <= 4 && _unk3 == -3) {
            facing = 6;
            process = 1;
      }
      
      if (!process)
            return 0;
      
      uint16 newScene = 0xFFFF;
      switch (facing) {
      case 0:
            newScene = curScene.exit1;
            break;
      
      case 2:
            newScene = curScene.exit2;
            break;
      
      case 4:
            newScene = curScene.exit3;
            break;
      
      case 6:
            newScene = curScene.exit4;
            break;
      
      default:
            newScene = _mainCharacter.sceneId;
            break;
      }
      
      if (newScene == 0xFFFF)
            return 0;
      
      enterNewScene(newScene, facing, 1, 1, 0);
      return 1;
}

void KyraEngine_v2::unloadScene() {
      _scriptInterpreter->unloadScript(&_sceneScriptData);
      freeSceneShapePtrs();
      freeSceneAnims();
}

void KyraEngine_v2::loadScenePal() {
      uint16 sceneId = _mainCharacter.sceneId;
      memcpy(_screen->getPalette(1), _screen->getPalette(0), 768);
      
      char filename[14];
      strcpy(filename, _sceneList[sceneId].filename);
      strcat(filename, ".COL");
      _screen->loadBitmap(filename, 3, 3, 0);
      memcpy(_screen->getPalette(1), _screen->getCPagePtr(3), 384);
      memset(_screen->getPalette(1), 0, 3);
      memcpy(_scenePal, _screen->getCPagePtr(3)+336, 432);
}

void KyraEngine_v2::loadSceneMsc() {
      uint16 sceneId = _mainCharacter.sceneId;
      char filename[14];
      strcpy(filename, _sceneList[sceneId].filename);
      strcat(filename, ".MSC");
      _screen->loadBitmap(filename, 3, 5, 0);
}

void KyraEngine_v2::startSceneScript(int unk1) {
      uint16 sceneId = _mainCharacter.sceneId;
      char filename[14];
      
      strcpy(filename, _sceneList[sceneId].filename);
      if (sceneId == 68 && (queryGameFlag(0x1BC) || queryGameFlag(0x1DC)))
            strcpy(filename, "DOORX");    
      strcat(filename, ".CPS");

      _screen->loadBitmap(filename, 3, 3, 0);
      resetScaleTable();
      _useCharPal = false;
      memset(_charPalTable, 0, sizeof(_charPalTable));
      memset(_layerFlagTable, 0, sizeof(_layerFlagTable));
      memset(_specialSceneScriptState, 0, sizeof(_specialSceneScriptState));

      _sceneEnterX1 = 160;
      _sceneEnterY1 = 0;
      _sceneEnterX2 = 296;
      _sceneEnterY2 = 72;
      _sceneEnterX3 = 160;
      _sceneEnterY3 = 128;
      _sceneEnterX4 = 24;
      _sceneEnterY4 = 72;
      
      _sceneCommentString = "Undefined scene comment string!";
      _scriptInterpreter->initScript(&_sceneScriptState, &_sceneScriptData);
      
      strcpy(filename, _sceneList[sceneId].filename);
      strcat(filename, ".");
      strcat(filename, _scriptLangExt[_lang]);
      
      assert(_res->getFileSize(filename));
      _scriptInterpreter->loadScript(filename, &_sceneScriptData, &_opcodes);
      runSceneScript7();
            
      _scriptInterpreter->startScript(&_sceneScriptState, 0);
      _sceneScriptState.regs[0] = sceneId;
      _sceneScriptState.regs[5] = unk1;
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);

      memcpy(_gamePlayBuffer, _screen->getCPagePtr(3), 46080);
      
      for (int i = 0; i < 10; ++i) {
            _scriptInterpreter->initScript(&_sceneSpecialScripts[i], &_sceneScriptData);
            _scriptInterpreter->startScript(&_sceneSpecialScripts[i], i+8);
            _sceneSpecialScriptsTimer[i] = 0;
      }
      
      _sceneEnterX1 &= ~3;
      _sceneEnterX2 &= ~3;
      _sceneEnterX3 &= ~3;
      _sceneEnterX4 &= ~3;
      _sceneEnterY1 &= ~1;
      _sceneEnterY2 &= ~1;
      _sceneEnterY3 &= ~1;
      _sceneEnterY4 &= ~1;
}

void KyraEngine_v2::runSceneScript2() {
      _scriptInterpreter->initScript(&_sceneScriptState, &_sceneScriptData);
      _sceneScriptState.regs[4] = _itemInHand;
      _scriptInterpreter->startScript(&_sceneScriptState, 2);
      
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);
}

void KyraEngine_v2::runSceneScript4(int unk1) {
      _sceneScriptState.regs[4] = _itemInHand;
      _sceneScriptState.regs[5] = unk1;

      _scriptInterpreter->startScript(&_sceneScriptState, 4);
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);
}

void KyraEngine_v2::runSceneScript6() {
      _scriptInterpreter->initScript(&_sceneScriptState, &_sceneScriptData);

      _sceneScriptState.regs[0] = _mainCharacter.sceneId;
      _sceneScriptState.regs[1] = _mouseX;
      _sceneScriptState.regs[2] = _mouseY;
      _sceneScriptState.regs[4] = _itemInHand;

      _scriptInterpreter->startScript(&_sceneScriptState, 6);
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);
}

void KyraEngine_v2::runSceneScript7() {
      int oldPage = _screen->_curPage;
      _screen->_curPage = 2;
      
      _scriptInterpreter->startScript(&_sceneScriptState, 7);
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);

      _screen->_curPage = oldPage;
}

void KyraEngine_v2::initSceneAnims(int unk1) {
      for (int i = 0; i < ARRAYSIZE(_animObjects); ++i)
            _animObjects[i].enabled = 0;
      
      bool animInit = false;
      
      AnimObj *animState = &_animObjects[0];
      
      if (_mainCharacter.animFrame != 32)
            _mainCharacter.animFrame = _characterFrameTable[_mainCharacter.facing];
      
      animState->enabled = 1;
      animState->xPos1 = _mainCharacter.x1;
      animState->yPos1 = _mainCharacter.y1;
      animState->shapePtr = _defaultShapeTable[_mainCharacter.animFrame];
      animState->shapeIndex1 = animState->shapeIndex2 = _mainCharacter.animFrame;
      
      int frame = _mainCharacter.animFrame - 9;
      int shapeX = _shapeDescTable[frame].xAdd;
      int shapeY = _shapeDescTable[frame].yAdd;
      
      animState->xPos2 = _mainCharacter.x1;
      animState->yPos2 = _mainCharacter.y1;
      
      _charScaleX = _charScaleY = getScale(_mainCharacter.x1, _mainCharacter.y1);
      
      int shapeXScaled = (shapeX * _charScaleX) >> 8;
      int shapeYScaled = (shapeY * _charScaleY) >> 8;
      
      animState->xPos2 += shapeXScaled;
      animState->yPos2 += shapeYScaled;
      animState->xPos3 = animState->xPos2;
      animState->yPos3 = animState->yPos2;
      animState->needRefresh = 1;
      animState->unk8 = 1;

      _animList = 0;
      
      AnimObj *charAnimState = animState;
      
      for (int i = 0; i < 10; ++i) {
            animState = &_animObjects[i+1];
            animState->enabled = 0;
            animState->needRefresh = 0;
            animState->unk8 = 0;
            
            if (_sceneAnims[i].flags & 1) {
                  animState->enabled = 1;
                  animState->needRefresh = 1;
                  animState->unk8 = 1;
            }
            
            animState->animFlags = _sceneAnims[i].flags & 8;
            
            if (_sceneAnims[i].flags & 2)
                  animState->flags = 0x800;
            else
                  animState->flags = 0;
            
            if (_sceneAnims[i].flags & 4)
                  animState->flags |= 1;
            
            animState->xPos1 = _sceneAnims[i].x;
            animState->yPos1 = _sceneAnims[i].y;
            
            if (_sceneAnims[i].flags & 0x20)
                  animState->shapePtr = _sceneShapeTable[_sceneAnims[i].shapeIndex];
            else
                  animState->shapePtr = 0;
            
            if (_sceneAnims[i].flags & 0x40) {
                  animState->shapeIndex3 = _sceneAnims[i].shapeIndex;
                  animState->animNum = i;
            } else {
                  animState->shapeIndex3 = 0xFFFF;
                  animState->animNum = 0xFFFF;
            }
            
            animState->shapeIndex2 = 0xFFFF;
            
            animState->xPos3 = animState->xPos2 = _sceneAnims[i].x2;
            animState->yPos3 = animState->yPos2 = _sceneAnims[i].y2;
            animState->width = _sceneAnims[i].width;
            animState->height = _sceneAnims[i].height;
            animState->width2 = animState->height2 = _sceneAnims[i].specialSize;
            
            if (_sceneAnims[i].flags & 1) {
                  if (animInit) {
                        _animList = addToAnimListSorted(_animList, animState);
                  } else {
                        _animList = initAnimList(_animList, animState);
                        animInit = true;
                  }
            }
      }
      
      if (animInit) {
            _animList = addToAnimListSorted(_animList, charAnimState);
      } else {
            _animList = initAnimList(_animList, charAnimState);
            animInit = true;
      }
      
      for (int i = 0; i < 30; ++i) {
            animState = &_animObjects[i+11];
            
            uint16 shapeIndex = _itemList[i].id;
            if (shapeIndex == 0xFFFF || _itemList[i].sceneId != _mainCharacter.sceneId) {
                  animState->enabled = 0;
                  animState->needRefresh = 0;
                  animState->unk8 = 0;
            } else {
                  animState->xPos1 = _itemList[i].x;
                  animState->yPos1 = _itemList[i].y;
                  animState->shapePtr = _defaultShapeTable[64+shapeIndex];
                  animState->shapeIndex1 = animState->shapeIndex2 = shapeIndex+64;
                  
                  animState->xPos2 = _itemList[i].x;
                  animState->yPos2 = _itemList[i].y;
                  int objectScale = getScale(animState->xPos2, animState->yPos2);
                  
                  const uint8 *shape = getShapePtr(animState->shapeIndex1);
                  animState->xPos2 -= (_screen->getShapeScaledWidth(shape, objectScale) >> 1);
                  animState->yPos2 -= (_screen->getShapeScaledHeight(shape, objectScale) >> 1);
                  animState->xPos3 = animState->xPos2;
                  animState->yPos3 = animState->yPos2;
                  
                  animState->enabled = 1;
                  animState->needRefresh = 1;
                  animState->unk8 = 1;
                  
                  if (animInit) {
                        _animList = addToAnimListSorted(_animList, animState);
                  } else {
                        _animList = initAnimList(_animList, animState);
                        animInit = true;
                  }
            }
      }
      
      _animObjects[0].unk8 = 1;
      _animObjects[0].needRefresh = 1;
      
      for (int i = 1; i < 41; ++i) {
            if (_animObjects[i].enabled) {
                  _animObjects[i].needRefresh = 1;
                  _animObjects[i].unk8 = 1;
            }
      }
      
      restorePage3();
      drawAnimObjects();
      _screen->hideMouse();
      initSceneScreen(unk1);
      _screen->showMouse();
      refreshAnimObjects(0);
}

void KyraEngine_v2::initSceneScreen(int unk1) {
      if (_unkSceneScreenFlag1) {
            _screen->copyRegion(0, 0, 0, 0, 320, 144, 2, 0);
            return;
      }

      if (_noScriptEnter) {
            memset(_screen->getPalette(0), 0, 384);
            _screen->setScreenPalette(_screen->getPalette(0));
      }

      _screen->copyRegion(0, 0, 0, 0, 320, 144, 2, 0);

      if (_noScriptEnter)
            memcpy(_screen->getPalette(0), _screen->getPalette(1), 384);

      updateCharPal(0);

      _scriptInterpreter->startScript(&_sceneScriptState, 3);
      _sceneScriptState.regs[5] = unk1;
      while (_scriptInterpreter->validScript(&_sceneScriptState))
            _scriptInterpreter->runScript(&_sceneScriptState);
}

void KyraEngine_v2::updateSpecialSceneScripts() {
      uint32 nextTime = _system->getMillis() + _tickLength;
      const int startScript = _lastProcessedSceneScript;

      while (_system->getMillis() <= nextTime) {
            if (_sceneSpecialScriptsTimer[_lastProcessedSceneScript] <= _system->getMillis() && 
                  !_specialSceneScriptState[_lastProcessedSceneScript]) {
                  _specialSceneScriptRunFlag = true;
                  
                  while (_specialSceneScriptRunFlag && _sceneSpecialScriptsTimer[_lastProcessedSceneScript] <= _system->getMillis())
                        _specialSceneScriptRunFlag = _scriptInterpreter->runScript(&_sceneSpecialScripts[_lastProcessedSceneScript]) != 0;
            }
            
            if (!_scriptInterpreter->validScript(&_sceneSpecialScripts[_lastProcessedSceneScript])) {
                  _scriptInterpreter->startScript(&_sceneSpecialScripts[_lastProcessedSceneScript], 8+_lastProcessedSceneScript);
                  _specialSceneScriptRunFlag = false;
            }
            
            ++_lastProcessedSceneScript;
            if (_lastProcessedSceneScript >= 10)
                  _lastProcessedSceneScript = 0;
            
            if (_lastProcessedSceneScript == startScript)
                  return;
      }
}

void KyraEngine_v2::freeSceneShapePtrs() {
      for (int i = 0; i < ARRAYSIZE(_sceneShapeTable); ++i)
            delete [] _sceneShapeTable[i];
      memset(_sceneShapeTable, 0, sizeof(_sceneShapeTable));
}

void KyraEngine_v2::freeSceneAnims() {
      Common::for_each(_sceneAnimMovie, _sceneAnimMovie+ARRAYSIZE(_sceneAnimMovie), Common::mem_fun(&WSAMovieV2::close));
}

#pragma mark -
#pragma mark - Pathfinder
#pragma mark -

int KyraEngine_v2::findWay(int x, int y, int toX, int toY, int *moveTable, int moveTableSize) {
      debugC(9, kDebugLevelMain, "KyraEngine_v2::findWay(%d, %d, %d, %d, %p, %d)", x, y, toX, toY, (const void *)moveTable, moveTableSize);
      x &= ~3; toX &= ~3;
      y &= ~1; toY &= ~1;
      int size = KyraEngine::findWay(x, y, toX, toY, moveTable, moveTableSize);
      if (size) {
            //int temp = pathfinderUnk1(moveTable);
            //temp = pathfinderUnk3(temp, x, y);
            //pathfinderUnk5(moveTable, temp, x, y, moveTableSize);
      }
      return getMoveTableSize(moveTable);
}

bool KyraEngine_v2::lineIsPassable(int x, int y) {
      debugC(9, kDebugLevelMain, "KyraEngine_v2::lineIsPassable(%d, %d)", x, y);
      static int unkTable[] = { 1, 1, 1, 1, 1, 2, 4, 6, 8 };

      if (_pathfinderFlag & 2) {
            if (x >= 320)
                  return false;
      }
      
      if (_pathfinderFlag & 4) {
            if (y >= 144)
                  return false;
      }
      
      if (_pathfinderFlag & 8) {
            if (x < 0)
                  return false;
      }
      
      if (y > 143)
            return false;

      int unk1 = unkTable[getScale(x, y) >> 5];
      
      if (y < 0)
            y = 0;
      x -= unk1 >> 1;
      if (x < 0)
            x = 0;
      int x2 = x + unk1;
      if (x2 > 320)
            x2 = 320;
      
      for (;x < x2; ++x)
            if (!_screen->getShapeFlag1(x, y))
                  return false;

      return true;
}

bool KyraEngine_v2::directLinePassable(int x, int y, int toX, int toY) {
      while (x != toX && y != toY) {
            int facing = getFacingFromPointToPoint(x, y, toX, toY);
            x += _addXPosTable[facing];
            y += _addYPosTable[facing];
            if (!_screen->getShapeFlag1(x, y))
                  return false;
      }
      return true;
}

int KyraEngine_v2::pathfinderUnk1(int *moveTable) {
      bool breakLoop = false;
      int *moveTableCur = moveTable;
      int oldEntry = *moveTableCur, curEntry = *moveTableCur;
      int oldX = 0, newX = 0, oldY = 0, newY = 0;
      int lastEntry = 0;
      lastEntry = pathfinderUnk2(lastEntry, 0, 0);
      
      while (*moveTableCur != 8) {
            oldEntry = curEntry;
            
            while (true) {
                  curEntry = *moveTableCur;
                  if (curEntry >= 0 && curEntry <= 7)
                        break;
                  
                  if (curEntry == 8) {
                        breakLoop = true;
                        break;
                  } else {
                        ++moveTableCur;
                  }
            }
            
            if (breakLoop)
                  break;
            
            oldX = newX;
            oldY = newY;
            
            newX += _addXPosTable[curEntry];
            newY += _addYPosTable[curEntry];
            
            int temp = ABS(curEntry - oldEntry);
            if (temp > 4) {
                  temp = 8 - temp;
            }
            
            if (temp > 1 || oldEntry != curEntry)
                  lastEntry = pathfinderUnk2(lastEntry, oldX, oldY);
      
            ++moveTableCur;
      }
      
      lastEntry = pathfinderUnk2(lastEntry, newX, newY);
      _pathfinderUnkTable1[lastEntry*2+0] = -1;
      _pathfinderUnkTable1[lastEntry*2+1] = -1;
      return lastEntry;
}

int KyraEngine_v2::pathfinderUnk2(int index, int v1, int v2) {
      _pathfinderUnkTable1[index<<1] = v1;
      _pathfinderUnkTable1[(index<<1)+1] = v2;
      ++index;
      if (index >= 199)
            --index;
      return index;
}

int KyraEngine_v2::pathfinderUnk3(int tableLen, int x, int y) {
      int x1 = 0, y1 = 0;
      int x2 = 0, y2 = 0;
      int lastEntry = 0;
      int index2 = tableLen-1, index1 = 0;
      while (index2 > index1) {
            x1 = _pathfinderUnkTable1[index1*2+0] + x;
            y1 = _pathfinderUnkTable1[index1*2+1] + y;
            x2 = _pathfinderUnkTable1[index2*2+0] + x;
            y2 = _pathfinderUnkTable1[index2*2+0] + x;
            
            if (directLinePassable(x1, y1, x2, y2)) {
                  lastEntry = pathfinderUnk4(lastEntry, index2);
                  if (tableLen-1 == index2)
                        break;
                  index1 = index2;
                  index2 = tableLen-1;
            } else if (index1+1 == index2) {
                  lastEntry = pathfinderUnk4(lastEntry, index2);
                  index1 = index2;
                  index2 = tableLen-1;
            } else {
                  --index2;
            }
      }
      return lastEntry;
}

int KyraEngine_v2::pathfinderUnk4(int index, int v) {
      _pathfinderUnkTable2[index] = v;
      ++index;
      if (index >= 199)
            --index;
      return index;
}

void KyraEngine_v2::pathfinderUnk5(int *moveTable, int tableLen, int x, int y, int moveTableSize) {
      int x1 = 0, y1 = 0;
      int x2 = 0, y2 = 0;
      int index1 = 0, index2 = 0;
      int sizeLeft = moveTableSize;
      for (int i = 0; i < tableLen; ++i) {
            index2 = _pathfinderUnkTable2[i];
            x1 = _pathfinderUnkTable1[index1*2+0] + x;
            y1 = _pathfinderUnkTable1[index1*2+1] + y;
            x2 = _pathfinderUnkTable1[index2*2+0] + x;
            y2 = _pathfinderUnkTable1[index2*2+0] + x;
            
            int wayLen = findWay(x1, y1, x2, y2, moveTable, sizeLeft);
            moveTable += wayLen;
            sizeLeft -= wayLen;     // unlike the original we want to be sure that the size left is correct
            index1 = index2;
      }
}

void KyraEngine_v2::fadeScenePal(int srcIndex, int delayTime) {
      uint8 *dst = _screen->getPalette(0) + 336;
      const uint8 *src = _scenePal + (srcIndex << 4)*3;
      memcpy(dst, src, 48);

      _screen->fadePalette(_screen->getPalette(0), delayTime, &_updateFunctor);
}

} // end of namespace Kyra


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