void HandleBulletSpecialFlags( INT32 iBulletIndex )
{
BULLET *pBullet;
ANITILE_PARAMS AniParams;
FLOAT dX, dY;
UINT8 ubDirection;
pBullet = &( gBullets[ iBulletIndex ] );
memset( &AniParams, 0, sizeof( ANITILE_PARAMS ) );
if ( pBullet->fReal )
{
// Create ani tile if this is a spit!
if ( pBullet->usFlags & ( BULLET_FLAG_KNIFE ) )
{
AniParams.sGridNo = pBullet->sGridNo;
AniParams.ubLevelID = ANI_STRUCT_LEVEL;
AniParams.sDelay = 100;
AniParams.sStartFrame = 3;
AniParams.uiFlags = ANITILE_CACHEDTILE | ANITILE_FORWARD | ANITILE_LOOPING | ANITILE_USE_DIRECTION_FOR_START_FRAME;
AniParams.sX = FIXEDPT_TO_INT32( pBullet->qCurrX );
AniParams.sY = FIXEDPT_TO_INT32( pBullet->qCurrY );
AniParams.sZ = CONVERT_HEIGHTUNITS_TO_PIXELS( FIXEDPT_TO_INT32( pBullet->qCurrZ ) );
if ( pBullet->usFlags & ( BULLET_FLAG_CREATURE_SPIT ) )
{
strcpy( AniParams.zCachedFile, "TILECACHE\\SPIT2.STI" );
}
else if ( pBullet->usFlags & ( BULLET_FLAG_KNIFE ) )
{
strcpy( AniParams.zCachedFile, "TILECACHE\\KNIFING.STI" );
pBullet->ubItemStatus = pBullet->pFirer->inv[ HANDPOS ][0]->data.objectStatus;
}
// Get direction to use for this guy....
dX = ( (FLOAT)( pBullet->qIncrX ) / FIXEDPT_FRACTIONAL_RESOLUTION );
dY = ( (FLOAT)( pBullet->qIncrY ) / FIXEDPT_FRACTIONAL_RESOLUTION );
ubDirection = atan8( 0, 0, (INT16)( dX * 100 ), (INT16)( dY * 100 ) );
AniParams.uiUserData3 = ubDirection;
pBullet->pAniTile = CreateAnimationTile( &AniParams );
// IF we are anything that needs a shadow.. set it here....
if ( pBullet->usFlags & ( BULLET_FLAG_KNIFE ) )
{
AniParams.ubLevelID = ANI_SHADOW_LEVEL;
AniParams.sZ = 0;
pBullet->pShadowAniTile = CreateAnimationTile( &AniParams );
}
}
}
}
INT16 TrackScent( SOLDIERTYPE * pSoldier )
{
// This function returns the best gridno to go to based on the scent being followed,
// and the soldier (creature/animal)'s current direction (which is used to resolve
// ties.
INT32 iXDiff, iYDiff, iXIncr;
INT32 iStart, iXStart, iYStart;
INT32 iGridNo;
INT8 bDir;
INT32 iBestGridNo = NOWHERE;
UINT8 ubBestDirDiff = 5, ubBestStrength = 0;
UINT8 ubDirDiff, ubStrength;
UINT8 ubSoughtSmell;
MAP_ELEMENT * pMapElement;
iStart = pSoldier->sGridNo;
iXStart = iStart % WORLD_COLS;
iYStart = iStart / WORLD_COLS;
if (CREATURE_OR_BLOODCAT( pSoldier ) ) // or bloodcats
{
// tracking humans; search the edges of a 7x7 square for the
// most promising tile
ubSoughtSmell = HUMAN;
for (iYDiff = -RADIUS; iYDiff < (RADIUS + 1); iYDiff++)
{
if (iYStart + iYDiff < 0)
{
// outside of map! might be on map further down...
continue;
}
else if (iYStart + iYDiff > WORLD_ROWS)
{
// outside of bottom of map! abort!
break;
}
if (iYDiff == -RADIUS || iYDiff == RADIUS)
{
iXIncr = 1;
}
else
{
// skip over the spots in the centre of the square
iXIncr = RADIUS * 2;
}
for (iXDiff = -RADIUS; iXDiff < (RADIUS + 1); iXDiff += iXIncr)
{
iGridNo = iStart + iXDiff + iYDiff * WORLD_ROWS;
if (abs( iGridNo % WORLD_ROWS - iXStart ) > RADIUS)
{
// wrapped across map!
continue;
}
if (LegalNPCDestination(pSoldier,pSoldier->usActionData,ENSURE_PATH,WATEROK,0))
{
// check this location out
pMapElement = &(gpWorldLevelData[iGridNo]);
if (pMapElement->ubSmellInfo && (SMELL_TYPE( pMapElement->ubSmellInfo ) == ubSoughtSmell))
{
ubStrength = SMELL_STRENGTH( pMapElement->ubSmellInfo );
if (ubStrength > ubBestStrength )
{
iBestGridNo = iGridNo;
ubBestStrength = ubStrength;
bDir = atan8( (INT16) iXStart, (INT16) iYStart, (INT16) (iXStart + iXDiff), (INT16) (iYStart + iYDiff) );
// now convert it into a difference in degree between it and our current dir
ubBestDirDiff = abs( pSoldier->bDirection - bDir );
if (ubBestDirDiff > 4 ) // dir 0 compared with dir 6, for instance
{
ubBestDirDiff = 8 - ubBestDirDiff;
}
}
else if (ubStrength == ubBestStrength)
{
if (iBestGridNo == NOWHERE)
{
// first place we've found with the same strength
iBestGridNo = iGridNo;
ubBestStrength = ubStrength;
}
else
{
// use directions to decide between the two
// start by calculating direction to the new gridno
bDir = atan8( (INT16) iXStart, (INT16) iYStart, (INT16) (iXStart + iXDiff), (INT16) (iYStart + iYDiff) );
// now convert it into a difference in degree between it and our current dir
ubDirDiff = abs( pSoldier->bDirection - bDir );
if (ubDirDiff > 4 ) // dir 0 compared with dir 6, for instance
{
ubDirDiff = 8 - ubDirDiff;
}
if (ubDirDiff < ubBestDirDiff || ((ubDirDiff == ubBestDirDiff) && Random( 2 )))
{
// follow this trail as its closer to the one we're following!
// (in the case of a tie, we tossed a coin)
ubBestDirDiff = ubDirDiff;
}
}
}
}
}
}
// go on to next tile
}
// go on to next row
}
else
{
// who else can track?
}
if (iBestGridNo != NOWHERE )
{
pSoldier->usActionData = (INT16) iBestGridNo;
return( (INT16) iBestGridNo );
}
return( 0 );
}
