/* See if there is a target in range */
BOOL aiChooseTarget(BASE_OBJECT *psObj, BASE_OBJECT **ppsTarget, int weapon_slot, BOOL bUpdateTarget, UWORD *targetOrigin)
{
BASE_OBJECT *psTarget = NULL;
DROID *psCommander;
SDWORD curTargetWeight=-1;
UWORD tmpOrigin = ORIGIN_UNKNOWN;
if (targetOrigin)
{
*targetOrigin = ORIGIN_UNKNOWN;
}
/* Get the sensor range */
switch (psObj->type)
{
case OBJ_DROID:
if (((DROID *)psObj)->asWeaps[weapon_slot].nStat == 0)
{
return false;
}
if (((DROID *)psObj)->asWeaps[0].nStat == 0 &&
((DROID *)psObj)->droidType != DROID_SENSOR)
{
// Can't attack without a weapon
return false;
}
break;
case OBJ_STRUCTURE:
if (((STRUCTURE *)psObj)->numWeaps == 0 || ((STRUCTURE *)psObj)->asWeaps[0].nStat == 0)
{
// Can't attack without a weapon
return false;
}
break;
default:
break;
}
/* See if there is a something in range */
if (psObj->type == OBJ_DROID)
{
BASE_OBJECT *psCurrTarget = ((DROID *)psObj)->psActionTarget[0];
/* find a new target */
int newTargetWeight = aiBestNearestTarget((DROID *)psObj, &psTarget, weapon_slot, NULL);
/* Calculate weight of the current target if updating; but take care not to target
* ourselves... */
if (bUpdateTarget && psCurrTarget != psObj)
{
curTargetWeight = targetAttackWeight(psCurrTarget, psObj, weapon_slot);
}
if (newTargetWeight >= 0 // found a new target
&& (!bUpdateTarget // choosing a new target, don't care if current one is better
|| curTargetWeight <= 0 // attacker had no valid target, use new one
|| newTargetWeight > curTargetWeight + OLD_TARGET_THRESHOLD) // updating and new target is better
&& validTarget(psObj, psTarget, weapon_slot)
&& (aiDroidHasRange((DROID *)psObj, psTarget, weapon_slot) || (secondaryGetState((DROID *)psObj, DSO_HALTTYPE) != DSS_HALT_HOLD)))
{
ASSERT(!isDead(psTarget), "aiChooseTarget: Droid found a dead target!");
*ppsTarget = psTarget;
return true;
}
}
else if (psObj->type == OBJ_STRUCTURE)
{
WEAPON_STATS *psWStats = NULL;
int tarDist, longRange = 0;
BOOL bCommanderBlock = false;
ASSERT(((STRUCTURE *)psObj)->asWeaps[weapon_slot].nStat > 0, "no weapons on structure");
psWStats = ((STRUCTURE *)psObj)->asWeaps[weapon_slot].nStat + asWeaponStats;
longRange = proj_GetLongRange(psWStats);
// see if there is a target from the command droids
psTarget = NULL;
psCommander = cmdDroidGetDesignator(psObj->player);
if (!proj_Direct(psWStats) && (psCommander != NULL) &&
aiStructHasRange((STRUCTURE *)psObj, (BASE_OBJECT *)psCommander, weapon_slot))
{
// there is a commander that can fire designate for this structure
// set bCommanderBlock so that the structure does not fire until the commander
// has a target - (slow firing weapons will not be ready to fire otherwise).
bCommanderBlock = true;
// I do believe this will never happen, check for yourself :-)
debug(LOG_NEVER,"Commander %d is good enough for fire designation", psCommander->id);
if (psCommander->action == DACTION_ATTACK
&& psCommander->psActionTarget[0] != NULL
&& !aiObjectIsProbablyDoomed(psCommander->psActionTarget[0]))
{
// the commander has a target to fire on
if (aiStructHasRange((STRUCTURE *)psObj, psCommander->psActionTarget[0], weapon_slot))
{
// target in range - fire on it
tmpOrigin = ORIGIN_COMMANDER;
psTarget = psCommander->psActionTarget[0];
}
else
{
// target out of range - release the commander block
bCommanderBlock = false;
}
}
}
// indirect fire structures use sensor towers first
tarDist = longRange * longRange;
if (psTarget == NULL && !bCommanderBlock && !proj_Direct(psWStats))
{
psTarget = aiSearchSensorTargets(psObj, weapon_slot, psWStats, &tmpOrigin);
}
if (psTarget == NULL && !bCommanderBlock)
{
BASE_OBJECT *psCurr;
gridStartIterate(psObj->pos.x, psObj->pos.y, PREVIOUS_DEFAULT_GRID_SEARCH_RADIUS);
psCurr = gridIterate();
while (psCurr != NULL)
{
/* Check that it is a valid target */
if (psCurr->type != OBJ_FEATURE && !aiObjectIsProbablyDoomed(psCurr) && aiStructHasRange((STRUCTURE *)psObj, psCurr, weapon_slot)
&& !aiCheckAlliances(psCurr->player, psObj->player)
&& validTarget(psObj, psCurr, weapon_slot) && psCurr->visible[psObj->player])
{
// See if in sensor range and visible
int distSq = objPosDiffSq(psCurr->pos, psObj->pos);
if (distSq < tarDist
|| (psTarget && psTarget->type == OBJ_STRUCTURE && ((STRUCTURE *)psTarget)->status != SS_BUILT)
|| (psTarget && aiObjIsWall(psTarget) && !aiObjIsWall(psCurr)))
{
tmpOrigin = ORIGIN_VISUAL;
psTarget = psCurr;
tarDist = distSq;
}
}
psCurr = gridIterate();
}
}
if (psTarget)
{
ASSERT(!psTarget->died, "aiChooseTarget: Structure found a dead target!");
if (targetOrigin)
{
*targetOrigin = tmpOrigin;
}
*ppsTarget = psTarget;
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 (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;
}
