/** Search the global list of sensors for a possible target for psObj. */
static BASE_OBJECT *aiSearchSensorTargets(BASE_OBJECT *psObj, int weapon_slot, WEAPON_STATS *psWStats, UWORD *targetOrigin)
{
int longRange = proj_GetLongRange(psWStats);
int tarDist = longRange * longRange;
BOOL foundCB = false;
int minDist = psWStats->minRange * psWStats->minRange;
BASE_OBJECT *psSensor, *psTarget = NULL;
if (targetOrigin)
{
*targetOrigin = ORIGIN_UNKNOWN;
}
for (psSensor = apsSensorList[0]; psSensor; psSensor = psSensor->psNextFunc)
{
BASE_OBJECT *psTemp = NULL;
bool isCB = false;
bool isRD = false;
if (!aiCheckAlliances(psSensor->player, psObj->player))
{
continue;
}
else if (psSensor->type == OBJ_DROID)
{
DROID *psDroid = (DROID *)psSensor;
ASSERT_OR_RETURN(false, psDroid->droidType == DROID_SENSOR, "A non-sensor droid in a sensor list is non-sense");
psTemp = psDroid->psTarget;
isCB = cbSensorDroid(psDroid);
isRD = objRadarDetector((BASE_OBJECT *)psDroid);
}
else if (psSensor->type == OBJ_STRUCTURE)
{
STRUCTURE *psCStruct = (STRUCTURE *)psSensor;
// skip incomplete structures
if (psCStruct->status != SS_BUILT)
{
continue;
}
psTemp = psCStruct->psTarget[0];
isCB = structCBSensor(psCStruct);
isRD = objRadarDetector((BASE_OBJECT *)psCStruct);
}
if (!psTemp || aiObjectIsProbablyDoomed(psTemp) || !validTarget(psObj, psTemp, 0) || aiCheckAlliances(psTemp->player, psObj->player))
{
continue;
}
if (aiObjHasRange(psObj, psTemp, weapon_slot) && visibleObject(psSensor, psTemp, false))
{
int distSq = objPosDiffSq(psTemp->pos, psObj->pos);
// Need to be in range, prefer closer targets or CB targets
if ((isCB > foundCB || (isCB == foundCB && distSq < tarDist)) && distSq > minDist)
{
tarDist = distSq;
psTarget = psTemp;
if (targetOrigin)
{
*targetOrigin = ORIGIN_SENSOR;
}
if (isCB)
{
if (targetOrigin)
{
*targetOrigin = ORIGIN_CB_SENSOR;
}
foundCB = true; // got CB target, drop everything and shoot!
}
else if (isRD)
{
if (targetOrigin)
{
*targetOrigin = ORIGIN_RADAR_DETECTOR;
}
}
}
}
}
return psTarget;
}
/* See if there is a target in range for Sensor objects*/
BOOL aiChooseSensorTarget(BASE_OBJECT *psObj, BASE_OBJECT **ppsTarget)
{
int sensorRange = objSensorRange(psObj);
unsigned int radSquared = sensorRange * sensorRange;
bool radarDetector = objRadarDetector(psObj);
if (!objActiveRadar(psObj) && !radarDetector)
{
ASSERT(false, "Only to be used for sensor turrets!");
return false;
}
/* See if there is something in range */
if (radarDetector)
{
BASE_OBJECT *psCurr, *psTemp = NULL;
int tarDist = SDWORD_MAX;
gridStartIterate(psObj->pos.x, psObj->pos.y, PREVIOUS_DEFAULT_GRID_SEARCH_RADIUS);
psCurr = gridIterate();
while (psCurr != NULL)
{
if ((psCurr->type == OBJ_STRUCTURE || psCurr->type == OBJ_DROID) &&
!aiObjectIsProbablyDoomed(psCurr))
{
if (!aiCheckAlliances(psCurr->player,psObj->player)
&& objActiveRadar(psCurr))
{
// See if in twice *their* sensor range
const int xdiff = psCurr->pos.x - psObj->pos.x;
const int ydiff = psCurr->pos.y - psObj->pos.y;
const unsigned int distSq = xdiff * xdiff + ydiff * ydiff;
const int targetSensor = objSensorRange(psCurr) * 2;
const unsigned int sensorSquared = targetSensor * targetSensor;
if (distSq < sensorSquared && distSq < tarDist)
{
psTemp = psCurr;
tarDist = distSq;
}
}
}
psCurr = gridIterate();
}
if (psTemp)
{
objTrace(psTemp->id, "Targetted by radar detector %d", (int)psObj->id);
objTrace(psObj->id, "Targetting radar %d", (int)psTemp->id);
ASSERT(!psTemp->died, "aiChooseSensorTarget gave us a dead target");
*ppsTarget = psTemp;
return true;
}
}
else if (psObj->type == OBJ_DROID)
{
BASE_OBJECT *psTarget = NULL;
if (aiBestNearestTarget((DROID *)psObj, &psTarget, 0, NULL) >= 0)
{
/* See if in sensor range */
const int xdiff = psTarget->pos.x - psObj->pos.x;
const int ydiff = psTarget->pos.y - psObj->pos.y;
const unsigned int distSq = xdiff * xdiff + ydiff * ydiff;
// I do believe this will never happen, check for yourself :-)
debug(LOG_NEVER, "Sensor droid(%d) found possible target(%d)!!!", psObj->id, psTarget->id);
if (distSq < radSquared)
{
*ppsTarget = psTarget;
return true;
}
}
}
else // structure
{
BASE_OBJECT *psCurr, *psTemp = NULL;
int tarDist = SDWORD_MAX;
gridStartIterate(psObj->pos.x, psObj->pos.y, PREVIOUS_DEFAULT_GRID_SEARCH_RADIUS);
psCurr = gridIterate();
while (psCurr != NULL)
{
// Don't target features or doomed/dead objects
if (psCurr->type != OBJ_FEATURE && !aiObjectIsProbablyDoomed(psCurr))
{
if (!aiCheckAlliances(psCurr->player,psObj->player) && !aiObjIsWall(psCurr))
{
// See if in sensor range and visible
const int xdiff = psCurr->pos.x - psObj->pos.x;
const int ydiff = psCurr->pos.y - psObj->pos.y;
const unsigned int distSq = xdiff * xdiff + ydiff * ydiff;
if (distSq < radSquared && psCurr->visible[psObj->player] && distSq < tarDist)
{
psTemp = psCurr;
tarDist = distSq;
}
}
}
psCurr = gridIterate();
}
if (psTemp)
{
ASSERT(!psTemp->died, "aiChooseSensorTarget gave us a dead target");
*ppsTarget = psTemp;
return true;
}
}
return false;
}
/* See if there is a target in range for Sensor objects*/
bool aiChooseSensorTarget(BASE_OBJECT *psObj, BASE_OBJECT **ppsTarget)
{
int sensorRange = objSensorRange(psObj);
unsigned int radSquared = sensorRange * sensorRange;
bool radarDetector = objRadarDetector(psObj);
if (!objActiveRadar(psObj) && !radarDetector)
{
ASSERT(false, "Only to be used for sensor turrets!");
return false;
}
/* See if there is something in range */
if (psObj->type == OBJ_DROID)
{
BASE_OBJECT *psTarget = NULL;
if (aiBestNearestTarget((DROID *)psObj, &psTarget, 0) >= 0)
{
/* See if in sensor range */
const int xdiff = psTarget->pos.x - psObj->pos.x;
const int ydiff = psTarget->pos.y - psObj->pos.y;
const unsigned int distSq = xdiff * xdiff + ydiff * ydiff;
// I do believe this will never happen, check for yourself :-)
debug(LOG_NEVER, "Sensor droid(%d) found possible target(%d)!!!", psObj->id, psTarget->id);
if (distSq < radSquared)
{
*ppsTarget = psTarget;
return true;
}
}
}
else // structure
{
BASE_OBJECT *psTemp = NULL;
int tarDist = SDWORD_MAX;
static GridList gridList; // static to avoid allocations.
gridList = gridStartIterate(psObj->pos.x, psObj->pos.y, objSensorRange(psObj));
for (GridIterator gi = gridList.begin(); gi != gridList.end(); ++gi)
{
BASE_OBJECT *psCurr = *gi;
// Don't target features or doomed/dead objects
if (psCurr->type != OBJ_FEATURE && !psCurr->died && !aiObjectIsProbablyDoomed(psCurr, false))
{
if (!aiCheckAlliances(psCurr->player, psObj->player) && !aiObjIsWall(psCurr))
{
// See if in sensor range and visible
const int xdiff = psCurr->pos.x - psObj->pos.x;
const int ydiff = psCurr->pos.y - psObj->pos.y;
const unsigned int distSq = xdiff * xdiff + ydiff * ydiff;
if (distSq < radSquared && psCurr->visible[psObj->player] == UBYTE_MAX && distSq < tarDist)
{
psTemp = psCurr;
tarDist = distSq;
}
}
}
}
if (psTemp)
{
ASSERT(!psTemp->died, "aiChooseSensorTarget gave us a dead target");
*ppsTarget = psTemp;
return true;
}
}
return false;
}
