jaggedalliance2/ja2/Build/TileEngine/SmokeEffects.c

#ifdef PRECOMPILEDHEADERS
	#include "TileEngine All.h"
#else
	#include <stdio.h>
	#include <string.h>
	#include "wcheck.h"
	#include "stdlib.h"
	#include "debug.h"
	#include "soldier control.h"
	#include "weapons.h"
	#include "handle items.h"
	#include "worlddef.h"	
	#include "worldman.h"
	#include "animation control.h"
	#include "tile animation.h"
	#include "handle items.h"
	#include "smokeeffects.h"
	#include "message.h"
	#include "isometric utils.h"
	#include "renderworld.h"
	#include "explosion control.h"
	#include "Random.h"
#endif

#include "SaveLoadGame.h"


INT8 FromWorldFlagsToSmokeType( UINT8 ubWorldFlags );
UINT8 FromSmokeTypeToWorldFlags( INT8 bType );



#define		NUM_SMOKE_EFFECT_SLOTS					25


// GLOBAL FOR SMOKE LISTING
SMOKEEFFECT				gSmokeEffectData[ NUM_SMOKE_EFFECT_SLOTS ];
UINT32						guiNumSmokeEffects = 0;


INT32 GetFreeSmokeEffect( void );
void RecountSmokeEffects( void );



INT32 GetFreeSmokeEffect( void )
{
	UINT32 uiCount;

	for(uiCount=0; uiCount < guiNumSmokeEffects; uiCount++)
	{
		if(( gSmokeEffectData[uiCount].fAllocated==FALSE ) )
			return( (INT32)uiCount );
	}

	if( guiNumSmokeEffects < NUM_SMOKE_EFFECT_SLOTS )
		return( (INT32) guiNumSmokeEffects++ );

	return( -1 );
}

void RecountSmokeEffects( void )
{
	INT32 uiCount;

	for(uiCount=guiNumSmokeEffects-1; (uiCount >=0) ; uiCount--)
	{
		if( ( gSmokeEffectData[uiCount].fAllocated ) )
		{
			guiNumSmokeEffects=(UINT32)(uiCount+1);
			break;
		}
	}
}




// Returns NO_SMOKE_EFFECT if none there...
INT8 GetSmokeEffectOnTile( INT16 sGridNo, INT8 bLevel )
{
	UINT8		ubExtFlags;

	ubExtFlags = gpWorldLevelData[ sGridNo ].ubExtFlags[ bLevel ];

	// Look at worldleveldata to find flags..
	if ( ubExtFlags & ANY_SMOKE_EFFECT )
	{
		// Which smoke am i?
		return( FromWorldFlagsToSmokeType( ubExtFlags ) );
	}

	return( NO_SMOKE_EFFECT );
}


INT8 FromWorldFlagsToSmokeType( UINT8 ubWorldFlags )
{
	if ( ubWorldFlags & MAPELEMENT_EXT_SMOKE )
	{
		return( NORMAL_SMOKE_EFFECT );
	}
	else if ( ubWorldFlags & MAPELEMENT_EXT_TEARGAS )
	{
		return( TEARGAS_SMOKE_EFFECT );
	}
	else if ( ubWorldFlags & MAPELEMENT_EXT_MUSTARDGAS )
	{
		return( MUSTARDGAS_SMOKE_EFFECT );
	}
	else if ( ubWorldFlags & MAPELEMENT_EXT_CREATUREGAS )
	{
		return( CREATURE_SMOKE_EFFECT );
	}
	else
	{
		return( NO_SMOKE_EFFECT );
	}
}


UINT8 FromSmokeTypeToWorldFlags( INT8 bType )
{
	switch( bType )
	{
		case NORMAL_SMOKE_EFFECT:

			return( MAPELEMENT_EXT_SMOKE );
			break;

		case TEARGAS_SMOKE_EFFECT:

			return( MAPELEMENT_EXT_TEARGAS );
			break;

		case MUSTARDGAS_SMOKE_EFFECT:

			return( MAPELEMENT_EXT_MUSTARDGAS );
			break;

    case CREATURE_SMOKE_EFFECT:
      
      return( MAPELEMENT_EXT_CREATUREGAS );
      break;

		default:

			return( 0 );
	}
}



INT32 NewSmokeEffect( INT16 sGridNo, UINT16 usItem, INT8 bLevel, UINT8 ubOwner )
{
	SMOKEEFFECT *pSmoke;
	INT32				iSmokeIndex;
	INT8				bSmokeEffectType=0;
	UINT8				ubDuration=0;
	UINT8				ubStartRadius=0;

	if( ( iSmokeIndex = GetFreeSmokeEffect() )==(-1) )
		return(-1);

	memset( &gSmokeEffectData[ iSmokeIndex ], 0, sizeof( SMOKEEFFECT ) );

	pSmoke = &gSmokeEffectData[ iSmokeIndex ];

	// Set some values...
	pSmoke->sGridNo									= sGridNo;
	pSmoke->usItem									= usItem;
	pSmoke->uiTimeOfLastUpdate			= GetWorldTotalSeconds( );

	// Are we indoors?
	if ( GetTerrainType( sGridNo ) == FLAT_FLOOR )
	{
		pSmoke->bFlags |= SMOKE_EFFECT_INDOORS;
	}


  switch( usItem )
  {
		case MUSTARD_GRENADE:

			bSmokeEffectType	=	MUSTARDGAS_SMOKE_EFFECT;
			ubDuration				= 5;
			ubStartRadius			= 1;
			break;

		case TEARGAS_GRENADE:
		case GL_TEARGAS_GRENADE:
			bSmokeEffectType	=	TEARGAS_SMOKE_EFFECT; 
			ubDuration				= 5;
			ubStartRadius			= 1;
			break;

		case BIG_TEAR_GAS:
			bSmokeEffectType	=	TEARGAS_SMOKE_EFFECT; 
			ubDuration				= 5;
			ubStartRadius			= 1;
			break;

		case SMOKE_GRENADE:
		case GL_SMOKE_GRENADE:

			bSmokeEffectType	=	NORMAL_SMOKE_EFFECT; 
			ubDuration				= 5;
			ubStartRadius			= 1;
			break;

    case SMALL_CREATURE_GAS:
			bSmokeEffectType	=	CREATURE_SMOKE_EFFECT; 
			ubDuration				= 3;
			ubStartRadius			= 1;
			break;

    case LARGE_CREATURE_GAS:
			bSmokeEffectType	=	CREATURE_SMOKE_EFFECT; 
			ubDuration				= 3;
			ubStartRadius			= Explosive[ Item[ LARGE_CREATURE_GAS ].ubClassIndex ].ubRadius;
			break;

    case VERY_SMALL_CREATURE_GAS:

			bSmokeEffectType	=	CREATURE_SMOKE_EFFECT; 
			ubDuration				= 2;
			ubStartRadius			= 0;
      break;
  }



	pSmoke->ubDuration	= ubDuration;
	pSmoke->ubRadius    = ubStartRadius;
	pSmoke->bAge				= 0;
	pSmoke->fAllocated  = TRUE;
	pSmoke->bType				= bSmokeEffectType;
  pSmoke->ubOwner     = ubOwner;

  if ( pSmoke->bFlags & SMOKE_EFFECT_INDOORS )
  {    
		// Duration is increased by 2 turns...indoors
		pSmoke->ubDuration += 3;
  }

  if ( bLevel )
  {
    pSmoke->bFlags |= SMOKE_EFFECT_ON_ROOF;
  }

  // ATE: FALSE into subsequent-- it's the first one!
  SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, FALSE, bLevel, iSmokeIndex );

	return( iSmokeIndex );
}


// Add smoke to gridno
// ( Replacement algorithm uses distance away )
void AddSmokeEffectToTile( INT32 iSmokeEffectID, INT8 bType, INT16 sGridNo, INT8 bLevel )
{
	ANITILE_PARAMS	AniParams;
	ANITILE					*pAniTile;
	SMOKEEFFECT     *pSmoke;
  BOOLEAN         fDissipating = FALSE;

	pSmoke = &gSmokeEffectData[ iSmokeEffectID ];

  if ( ( pSmoke->ubDuration - pSmoke->bAge ) < 2 )
  {
    fDissipating = TRUE;
    // Remove old one...
    RemoveSmokeEffectFromTile( sGridNo, bLevel );
  }


	// If smoke effect exists already.... stop
	if ( gpWorldLevelData[ sGridNo ].ubExtFlags[ bLevel ] & ANY_SMOKE_EFFECT )
	{
		return;
	}
		
	// OK,  Create anitile....
	memset( &AniParams, 0, sizeof( ANITILE_PARAMS ) );
	AniParams.sGridNo							= sGridNo;

  if ( bLevel == 0 )
  {
	  AniParams.ubLevelID						= ANI_STRUCT_LEVEL;
  }
  else
  {
	  AniParams.ubLevelID						= ANI_ONROOF_LEVEL;
  }


	AniParams.sDelay							= (INT16)( 300 + Random( 300 ) );

  if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
  {
	  AniParams.sStartFrame					= (INT16)0;
  }
  else
  {
	  AniParams.sStartFrame					= (INT16)Random( 5 );
  }


	// Bare bones flags are...
//	AniParams.uiFlags							= ANITILE_CACHEDTILE | ANITILE_FORWARD | ANITILE_OPTIMIZEFORSMOKEEFFECT | ANITILE_SMOKE_EFFECT | ANITILE_LOOPING;
	//AniParams.uiFlags							= ANITILE_CACHEDTILE | ANITILE_FORWARD | ANITILE_SMOKE_EFFECT | ANITILE_LOOPING;


  if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
  {
    AniParams.uiFlags	= ANITILE_PAUSED | ANITILE_CACHEDTILE | ANITILE_FORWARD | ANITILE_SMOKE_EFFECT | ANITILE_LOOPING;
  }
  else
  {
    AniParams.uiFlags	= ANITILE_CACHEDTILE | ANITILE_FORWARD | ANITILE_SMOKE_EFFECT | ANITILE_LOOPING | ANITILE_ALWAYS_TRANSLUCENT;
  }

	AniParams.sX									= CenterX( sGridNo );
	AniParams.sY									= CenterY( sGridNo );
	AniParams.sZ									= (INT16)0;

	// Use the right graphic based on type..
	switch( bType )
	{
		case NORMAL_SMOKE_EFFECT:

      if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
      {
			   strcpy( AniParams.zCachedFile, "TILECACHE\\smkechze.STI" );			
      }
      else
      {
        if ( fDissipating )
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\smalsmke.STI" );			
        }
        else
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\SMOKE.STI" );			
        }
      }
			break;

		case TEARGAS_SMOKE_EFFECT:

      if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
      {
			   strcpy( AniParams.zCachedFile, "TILECACHE\\tearchze.STI" );			
      }
      else
      {
        if ( fDissipating )
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\smaltear.STI" );			
        }
        else
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\TEARGAS.STI" );			
        }
      }
			break;

		case MUSTARDGAS_SMOKE_EFFECT:

      if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
      {
			   strcpy( AniParams.zCachedFile, "TILECACHE\\mustchze.STI" );			
      }
      else
      {
        if ( fDissipating )
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\smalmust.STI" );			
        }
        else
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\MUSTARD2.STI" );			
        }
      }
			break;

		case CREATURE_SMOKE_EFFECT:

      if ( !( gGameSettings.fOptions[ TOPTION_ANIMATE_SMOKE ] ) )
      {
			   strcpy( AniParams.zCachedFile, "TILECACHE\\spit_gas.STI" );			
      }
      else
      {
        if ( fDissipating )
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\spit_gas.STI" );			
        }
        else
        {
			    strcpy( AniParams.zCachedFile, "TILECACHE\\spit_gas.STI" );			
        }
      }
			break;

	}

	// Create tile...
	pAniTile = CreateAnimationTile( &AniParams );

	// Set world flags
	gpWorldLevelData[ sGridNo ].ubExtFlags[ bLevel ] |= FromSmokeTypeToWorldFlags( bType );

	// All done...

	// Re-draw..... :(
	SetRenderFlags(RENDER_FLAG_FULL);
}

void RemoveSmokeEffectFromTile( INT16 sGridNo, INT8 bLevel )
{
	ANITILE *pAniTile;
	UINT8		ubLevelID;

	// Get ANI tile...
	if ( bLevel == 0 )
	{
		ubLevelID = ANI_STRUCT_LEVEL;
	}
	else
	{
		ubLevelID = ANI_ONROOF_LEVEL;
	}

	pAniTile = GetCachedAniTileOfType( sGridNo, ubLevelID, ANITILE_SMOKE_EFFECT );
	
	if ( pAniTile != NULL )
	{
		DeleteAniTile( pAniTile );

		SetRenderFlags( RENDER_FLAG_FULL );
	}

	// Unset flags in world....
	// ( // check to see if we are the last one....
	if ( GetCachedAniTileOfType( sGridNo, ubLevelID, ANITILE_SMOKE_EFFECT ) == NULL )
	{
		gpWorldLevelData[ sGridNo ].ubExtFlags[ bLevel ] &= ( ~ANY_SMOKE_EFFECT );
	}
}


void DecaySmokeEffects( UINT32 uiTime )
{
	SMOKEEFFECT *pSmoke;
	UINT32	cnt, cnt2;
  BOOLEAN fUpdate = FALSE;
  BOOLEAN fSpreadEffect;
  INT8    bLevel;
  UINT16   usNumUpdates = 1;

	for ( cnt = 0; cnt < guiNumMercSlots; cnt++ )
	{
		if ( MercSlots[ cnt ] )
		{
			// reset 'hit by gas' flags
			MercSlots[ cnt ]->fHitByGasFlags = 0;
		}
	}

  // ATE: 1 ) make first pass and delete/mark any smoke effect for update
  // all the deleting has to be done first///

  // age all active tear gas clouds, deactivate those that are just dispersing
  for ( cnt = 0; cnt < guiNumSmokeEffects; cnt++ )
  {
		fSpreadEffect = TRUE;

		pSmoke = &gSmokeEffectData[ cnt ];
		
		if ( pSmoke->fAllocated )
		{
      if ( pSmoke->bFlags & SMOKE_EFFECT_ON_ROOF )
      {
        bLevel = 1;
      }
      else
      {
        bLevel = 0;
      }


      // Do things differently for combat /vs realtime
      // always try to update during combat
      if (gTacticalStatus.uiFlags & INCOMBAT )
      {
        fUpdate = TRUE;
      }
      else
      {
			  // ATE: Do this every so ofte, to acheive the effect we want...
			  if ( ( uiTime - pSmoke->uiTimeOfLastUpdate ) > 10 )
			  {
          fUpdate = TRUE;

          usNumUpdates = ( UINT16 ) ( ( uiTime - pSmoke->uiTimeOfLastUpdate ) / 10 );
        }
      }

      if ( fUpdate )
      {
				pSmoke->uiTimeOfLastUpdate = uiTime;

        for ( cnt2 = 0; cnt2 < usNumUpdates; cnt2++ )
        {
				  pSmoke->bAge++;

					if ( pSmoke->bAge == 1 )
					{
            // ATE: At least mark for update!
            pSmoke->bFlags |= SMOKE_EFFECT_MARK_FOR_UPDATE;
						fSpreadEffect = FALSE;
					}
					else
					{
						fSpreadEffect = TRUE;
					}

          if ( fSpreadEffect )
          {
				    // if this cloud remains effective (duration not reached)
				    if ( pSmoke->bAge <= pSmoke->ubDuration)
				    {
              // ATE: Only mark now and increse radius - actual drawing is done
              // in another pass cause it could
              // just get erased...
              pSmoke->bFlags |= SMOKE_EFFECT_MARK_FOR_UPDATE;

				      // calculate the new cloud radius
				      // cloud expands by 1 every turn outdoors, and every other turn indoors

              // ATE: If radius is < maximun, increase radius, otherwise keep at max
              if ( pSmoke->ubRadius < Explosive[ Item[ pSmoke->usItem ].ubClassIndex ].ubRadius )
              {
					      pSmoke->ubRadius++;
              }
				    }
  			    else
				    {
					    // deactivate tear gas cloud (use last known radius)
					    SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, ERASE_SPREAD_EFFECT, bLevel, cnt );
					    pSmoke->fAllocated = FALSE;
              break;
				    }
          }
        }
			}
			else
			{
				// damage anyone standing in cloud
				SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, REDO_SPREAD_EFFECT, 0, cnt );
			}
    }
  }

  for ( cnt = 0; cnt < guiNumSmokeEffects; cnt++ )
  {
		pSmoke = &gSmokeEffectData[ cnt ];
		
		if ( pSmoke->fAllocated )
		{
      if ( pSmoke->bFlags & SMOKE_EFFECT_ON_ROOF )
      {
        bLevel = 1;
      }
      else
      {
        bLevel = 0;
      }

		  // if this cloud remains effective (duration not reached)
		  if ( pSmoke->bFlags & SMOKE_EFFECT_MARK_FOR_UPDATE )
			{
  			SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, TRUE, bLevel, cnt );
        pSmoke->bFlags &= (~SMOKE_EFFECT_MARK_FOR_UPDATE);
			}
    }
  }

	AllTeamsLookForAll( TRUE );
}



BOOLEAN SaveSmokeEffectsToSaveGameFile( HWFILE hFile )
{
/*
	UINT32	uiNumBytesWritten;
	UINT32	uiCnt=0;
	UINT32	uiNumSmokeEffects=0;


	//loop through and count the number of smoke effects
	for( uiCnt=0; uiCnt<guiNumSmokeEffects; uiCnt++)
	{
		if( gSmokeEffectData[ uiCnt ].fAllocated )
			uiNumSmokeEffects++;
	}


	//Save the Number of Smoke Effects
	FileWrite( hFile, &uiNumSmokeEffects, sizeof( UINT32 ), &uiNumBytesWritten );
	if( uiNumBytesWritten != sizeof( UINT32 ) )
	{
		return( FALSE );
	}


	if( uiNumSmokeEffects != 0 )
	{
		//loop through and save the number of smoke effects
		for( uiCnt=0; uiCnt < guiNumSmokeEffects; uiCnt++)
		{
			//if the smoke is active
			if( gSmokeEffectData[ uiCnt ].fAllocated )
			{
				//Save the Smoke effect Data
				FileWrite( hFile, &gSmokeEffectData[ uiCnt ], sizeof( SMOKEEFFECT ), &uiNumBytesWritten );
				if( uiNumBytesWritten != sizeof( SMOKEEFFECT ) )
				{
					return( FALSE );
				}
			}
		}
	}
*/
	return( TRUE );
}


BOOLEAN LoadSmokeEffectsFromLoadGameFile( HWFILE hFile )
{
	UINT32	uiNumBytesRead;
	UINT32	uiCount;
	UINT32	uiCnt=0;
  INT8    bLevel;

	//no longer need to load smoke effects.  They are now in temp files
	if( guiSaveGameVersion < 75 )
	{
		//Clear out the old list
		memset( gSmokeEffectData, 0, sizeof( SMOKEEFFECT ) * NUM_SMOKE_EFFECT_SLOTS );

		//Load the Number of Smoke Effects
		FileRead( hFile, &guiNumSmokeEffects, sizeof( UINT32 ), &uiNumBytesRead );
		if( uiNumBytesRead != sizeof( UINT32 ) )
		{
			return( FALSE );
		}

		//This is a TEMP hack to allow us to use the saves
		if( guiSaveGameVersion < 37 && guiNumSmokeEffects == 0 )
		{
			//Load the Smoke effect Data
			FileRead( hFile, gSmokeEffectData, sizeof( SMOKEEFFECT ), &uiNumBytesRead );
			if( uiNumBytesRead != sizeof( SMOKEEFFECT ) )
			{
				return( FALSE );
			}
		}


		//loop through and load the list
		for( uiCnt=0; uiCnt<guiNumSmokeEffects;uiCnt++)
		{
			//Load the Smoke effect Data
			FileRead( hFile, &gSmokeEffectData[ uiCnt ], sizeof( SMOKEEFFECT ), &uiNumBytesRead );
			if( uiNumBytesRead != sizeof( SMOKEEFFECT ) )
			{
				return( FALSE );
			}
			//This is a TEMP hack to allow us to use the saves
			if( guiSaveGameVersion < 37 )
				break;
		}


		//loop through and apply the smoke effects to the map
		for(uiCount=0; uiCount < guiNumSmokeEffects; uiCount++)
		{
			//if this slot is allocated
			if( gSmokeEffectData[uiCount].fAllocated )
			{
        if ( gSmokeEffectData[uiCount].bFlags & SMOKE_EFFECT_ON_ROOF )
        {
          bLevel = 1;
        }
        else
        {
          bLevel = 0;
        }

				SpreadEffect( gSmokeEffectData[uiCount].sGridNo, gSmokeEffectData[uiCount].ubRadius, gSmokeEffectData[uiCount].usItem, gSmokeEffectData[uiCount].ubOwner, TRUE, bLevel, uiCount );
			}
		}
	}

	return( TRUE );
}


BOOLEAN SaveSmokeEffectsToMapTempFile( INT16 sMapX, INT16 sMapY, INT8 bMapZ )
{
	UINT32	uiNumSmokeEffects=0;
	HWFILE	hFile;
	UINT32	uiNumBytesWritten=0;
	CHAR8		zMapName[ 128 ];
	UINT32	uiCnt;

	//get the name of the map
	GetMapTempFileName( SF_SMOKE_EFFECTS_TEMP_FILE_EXISTS, zMapName, sMapX, sMapY, bMapZ );

	//delete file the file.
	FileDelete( zMapName );

	//loop through and count the number of smoke effects
	for( uiCnt=0; uiCnt<guiNumSmokeEffects; uiCnt++)
	{
		if( gSmokeEffectData[ uiCnt ].fAllocated )
			uiNumSmokeEffects++;
	}

	//if there are no smoke effects
	if( uiNumSmokeEffects == 0 )
	{
		//set the fact that there are no smoke effects for this sector
		ReSetSectorFlag( sMapX, sMapY, bMapZ, SF_SMOKE_EFFECTS_TEMP_FILE_EXISTS );

		return( TRUE );
	}

	//Open the file for writing
	hFile = FileOpen( zMapName, FILE_ACCESS_WRITE | FILE_OPEN_ALWAYS, FALSE );
	if( hFile == 0 )
	{
		//Error opening file
		return( FALSE );
	}


	//Save the Number of Smoke Effects
	FileWrite( hFile, &uiNumSmokeEffects, sizeof( UINT32 ), &uiNumBytesWritten );
	if( uiNumBytesWritten != sizeof( UINT32 ) )
	{
		//Close the file
		FileClose( hFile );

		return( FALSE );
	}


	//loop through and save the number of smoke effects
	for( uiCnt=0; uiCnt < guiNumSmokeEffects; uiCnt++)
	{
		//if the smoke is active
		if( gSmokeEffectData[ uiCnt ].fAllocated )
		{
			//Save the Smoke effect Data
			FileWrite( hFile, &gSmokeEffectData[ uiCnt ], sizeof( SMOKEEFFECT ), &uiNumBytesWritten );
			if( uiNumBytesWritten != sizeof( SMOKEEFFECT ) )
			{
				//Close the file
				FileClose( hFile );

				return( FALSE );
			}
		}
	}

	//Close the file
	FileClose( hFile );

	SetSectorFlag( sMapX, sMapY, bMapZ, SF_SMOKE_EFFECTS_TEMP_FILE_EXISTS );

	return( TRUE );
}



BOOLEAN LoadSmokeEffectsFromMapTempFile( INT16 sMapX, INT16 sMapY, INT8 bMapZ )
{
	UINT32	uiNumBytesRead;
	UINT32	uiCount;
	UINT32	uiCnt=0;
	HWFILE	hFile;
	UINT32	uiNumBytesWritten=0;
	CHAR8		zMapName[ 128 ];
  INT8    bLevel;

	GetMapTempFileName( SF_SMOKE_EFFECTS_TEMP_FILE_EXISTS, zMapName, sMapX, sMapY, bMapZ );

	//Open the file for reading, Create it if it doesnt exist
	hFile = FileOpen( zMapName, FILE_ACCESS_READ | FILE_OPEN_EXISTING, FALSE );
	if( hFile == 0 )
	{
		//Error opening map modification file
		return( FALSE );
	}

	//Clear out the old list
	ResetSmokeEffects();


	//Load the Number of Smoke Effects
	FileRead( hFile, &guiNumSmokeEffects, sizeof( UINT32 ), &uiNumBytesRead );
	if( uiNumBytesRead != sizeof( UINT32 ) )
	{
		FileClose( hFile );
		return( FALSE );
	}

	//loop through and load the list
	for( uiCnt=0; uiCnt<guiNumSmokeEffects;uiCnt++)
	{
		//Load the Smoke effect Data
		FileRead( hFile, &gSmokeEffectData[ uiCnt ], sizeof( SMOKEEFFECT ), &uiNumBytesRead );
		if( uiNumBytesRead != sizeof( SMOKEEFFECT ) )
		{
			FileClose( hFile );
			return( FALSE );
		}
	}


	//loop through and apply the smoke effects to the map
	for(uiCount=0; uiCount < guiNumSmokeEffects; uiCount++)
	{
		//if this slot is allocated
		if( gSmokeEffectData[uiCount].fAllocated )
		{
      if ( gSmokeEffectData[uiCount].bFlags & SMOKE_EFFECT_ON_ROOF )
      {
        bLevel = 1;
      }
      else
      {
        bLevel = 0;
      }

			SpreadEffect( gSmokeEffectData[uiCount].sGridNo, gSmokeEffectData[uiCount].ubRadius, gSmokeEffectData[uiCount].usItem, gSmokeEffectData[uiCount].ubOwner, TRUE, bLevel, uiCount );
		}
	}

	FileClose( hFile );

	return( TRUE );
}


void ResetSmokeEffects()
{
	//Clear out the old list
	memset( gSmokeEffectData, 0, sizeof( SMOKEEFFECT ) * NUM_SMOKE_EFFECT_SLOTS );
	guiNumSmokeEffects = 0;
}


void UpdateSmokeEffectGraphics( )
{
  UINT32      uiCnt;
	SMOKEEFFECT *pSmoke;
  INT8        bLevel;

	//loop through and save the number of smoke effects
	for( uiCnt=0; uiCnt < guiNumSmokeEffects; uiCnt++)
	{
		pSmoke = &gSmokeEffectData[ uiCnt ];

		//if the smoke is active
		if( gSmokeEffectData[ uiCnt ].fAllocated )
		{
      if ( gSmokeEffectData[uiCnt].bFlags & SMOKE_EFFECT_ON_ROOF )
      {
        bLevel = 1;
      }
      else
      {
        bLevel = 0;
      }

			SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, ERASE_SPREAD_EFFECT, bLevel, uiCnt );

  		SpreadEffect( pSmoke->sGridNo, pSmoke->ubRadius, pSmoke->usItem, pSmoke->ubOwner, TRUE, bLevel, uiCnt );
    }
  }
}