/*checks through the target players list of structures and droids to see
if any support a counter battery sensor*/
void counterBatteryFire(BASE_OBJECT *psAttacker, BASE_OBJECT *psTarget)
{
BASE_OBJECT *psViewer;
/*if a null target is passed in ignore - this will be the case when a 'miss'
projectile is sent - we may have to cater for these at some point*/
// also ignore cases where you attack your own player
// Also ignore cases where there are already 1000 missiles heading towards the attacker.
if ((psTarget == NULL) ||
((psAttacker != NULL) && (psAttacker->player == psTarget->player)) ||
aiObjectIsProbablyDoomed(psAttacker))
{
return;
}
CHECK_OBJECT(psTarget);
gridStartIterate(psTarget->pos.x, psTarget->pos.y, PREVIOUS_DEFAULT_GRID_SEARCH_RADIUS);
for (psViewer = gridIterate(); psViewer != NULL; psViewer = gridIterate())
{
STRUCTURE *psStruct;
DROID *psDroid;
SDWORD sensorRange = 0;
if (psViewer->player != psTarget->player)
{
//ignore non target players' objects
continue;
}
if (psViewer->type == OBJ_STRUCTURE)
{
psStruct = (STRUCTURE *)psViewer;
//check if have a sensor of correct type
if (structCBSensor(psStruct) || structVTOLCBSensor(psStruct))
{
sensorRange = psStruct->pStructureType->pSensor->range;
}
}
else if (psViewer->type == OBJ_DROID)
{
psDroid = (DROID *)psViewer;
//must be a CB sensor
if (cbSensorDroid(psDroid))
{
sensorRange = asSensorStats[psDroid->asBits[COMP_SENSOR].
nStat].range;
}
}
//check sensor distance from target
if (sensorRange)
{
SDWORD xDiff = (SDWORD)psViewer->pos.x - (SDWORD)psTarget->pos.x;
SDWORD yDiff = (SDWORD)psViewer->pos.y - (SDWORD)psTarget->pos.y;
if (xDiff*xDiff + yDiff*yDiff < sensorRange * sensorRange)
{
//inform viewer of target
if (psViewer->type == OBJ_DROID)
{
orderDroidObj((DROID *)psViewer, DORDER_OBSERVE, psAttacker, ModeImmediate);
}
else if (psViewer->type == OBJ_STRUCTURE)
{
((STRUCTURE *)psViewer)->psTarget[0] = psAttacker;
}
}
}
}
}
/* 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;
}
// Find the best nearest target for a droid
// Returns integer representing target priority, -1 if failed
SDWORD aiBestNearestTarget(DROID *psDroid, BASE_OBJECT **ppsObj, int weapon_slot, UWORD *targetOrigin)
{
SDWORD bestMod = 0,newMod, failure = -1;
BASE_OBJECT *psTarget = NULL, *friendlyObj, *bestTarget = NULL, *iter, *targetInQuestion, *tempTarget;
BOOL electronic = false;
STRUCTURE *targetStructure;
WEAPON_EFFECT weaponEffect;
UWORD tmpOrigin = ORIGIN_UNKNOWN;
// reset origin
if (targetOrigin)
{
*targetOrigin = ORIGIN_UNKNOWN;
}
//don't bother looking if empty vtol droid
if (vtolEmpty(psDroid))
{
return failure;
}
/* Return if have no weapons */
// The ai orders a non-combat droid to patrol = crash without it...
if ((psDroid->asWeaps[0].nStat == 0 || psDroid->numWeaps == 0) && psDroid->droidType != DROID_SENSOR)
{
return failure;
}
// Check if we have a CB target to begin with
if (!proj_Direct(asWeaponStats + psDroid->asWeaps[weapon_slot].nStat))
{
WEAPON_STATS *psWStats = psWStats = psDroid->asWeaps[weapon_slot].nStat + asWeaponStats;
bestTarget = aiSearchSensorTargets((BASE_OBJECT *)psDroid, weapon_slot, psWStats, &tmpOrigin);
bestMod = targetAttackWeight(bestTarget, (BASE_OBJECT *)psDroid, weapon_slot);
}
weaponEffect = ((WEAPON_STATS *)(asWeaponStats + psDroid->asWeaps[weapon_slot].nStat))->weaponEffect;
electronic = electronicDroid(psDroid);
// Range was previously 9*TILE_UNITS. Increasing this doesn't seem to help much, though. Not sure why.
gridStartIterate(psDroid->pos.x, psDroid->pos.y, psDroid->sensorRange + 6*TILE_UNITS);
for (iter = gridIterate(); iter != NULL; iter = gridIterate())
{
friendlyObj = NULL;
targetInQuestion = iter;
/* This is a friendly unit, check if we can reuse its target */
if(aiCheckAlliances(targetInQuestion->player,psDroid->player))
{
friendlyObj = targetInQuestion;
targetInQuestion = NULL;
/* Can we see what it is doing? */
if(friendlyObj->visible[psDroid->player])
{
if(friendlyObj->type == OBJ_DROID)
{
DROID *friendlyDroid = (DROID *)friendlyObj;
/* See if friendly droid has a target */
tempTarget = friendlyDroid->psActionTarget[0];
if(tempTarget && !aiObjectIsProbablyDoomed(tempTarget))
{
//make sure a weapon droid is targeting it
if(friendlyDroid->numWeaps > 0)
{
// make sure this target wasn't assigned explicitly to this droid
if(friendlyDroid->order != DORDER_ATTACK)
{
// make sure target is near enough
if (aiDroidHasRange(psDroid, tempTarget, weapon_slot))
{
targetInQuestion = tempTarget; //consider this target
}
}
}
}
}
else if(friendlyObj->type == OBJ_STRUCTURE)
{
tempTarget = ((STRUCTURE*)friendlyObj)->psTarget[0];
if (tempTarget && !aiObjectIsProbablyDoomed(tempTarget) && aiDroidHasRange(psDroid, tempTarget, weapon_slot))
{
targetInQuestion = tempTarget;
}
}
}
}
if (targetInQuestion != NULL
&& targetInQuestion != (BASE_OBJECT *)psDroid // in case friendly unit had me as target
&& (targetInQuestion->type == OBJ_DROID || targetInQuestion->type == OBJ_STRUCTURE || targetInQuestion->type == OBJ_FEATURE)
&& targetInQuestion->visible[psDroid->player]
&& !aiCheckAlliances(targetInQuestion->player,psDroid->player)
&& validTarget((BASE_OBJECT *)psDroid, targetInQuestion, weapon_slot)
&& aiDroidHasRange(psDroid, targetInQuestion, weapon_slot))
{
if (targetInQuestion->type == OBJ_DROID)
{
// in multiPlayer - don't attack Transporters with EW
if (bMultiPlayer)
{
// if not electronic then valid target
if (!electronic
|| (electronic
&& ((DROID *)targetInQuestion)->droidType != DROID_TRANSPORTER))
{
//only a valid target if NOT a transporter
psTarget = targetInQuestion;
}
}
else
{
psTarget = targetInQuestion;
}
}
else if (targetInQuestion->type == OBJ_STRUCTURE)
{
STRUCTURE *psStruct = (STRUCTURE *)targetInQuestion;
if (electronic)
{
/* don't want to target structures with resistance of zero if using electronic warfare */
if (validStructResistance((STRUCTURE *)targetInQuestion))
{
psTarget = targetInQuestion;
}
}
else if (psStruct->asWeaps[weapon_slot].nStat > 0)
{
// structure with weapons - go for this
psTarget = targetInQuestion;
}
else if ((psStruct->pStructureType->type != REF_WALL && psStruct->pStructureType->type != REF_WALLCORNER)
|| driveModeActive() || (bMultiPlayer && !isHumanPlayer(psDroid->player)))
{
psTarget = targetInQuestion;
}
}
else if (targetInQuestion->type == OBJ_FEATURE
&& gameTime - psDroid->lastFrustratedTime < FRUSTRATED_TIME
&& ((FEATURE *)targetInQuestion)->psStats->damageable
&& !(game.scavengers && psDroid->player == 7)) // hack to avoid scavs blowing up their nice feature walls
{
psTarget = targetInQuestion;
}
/* Check if our weapon is most effective against this object */
if(psTarget != NULL && psTarget == targetInQuestion) //was assigned?
{
newMod = targetAttackWeight(psTarget, (BASE_OBJECT *)psDroid, weapon_slot);
/* Remember this one if it's our best target so far */
if( newMod >= 0 && (newMod > bestMod || bestTarget == NULL))
{
bestMod = newMod;
tmpOrigin = ORIGIN_ALLY;
bestTarget = psTarget;
}
}
}
}
if (bestTarget)
{
ASSERT(!bestTarget->died, "aiBestNearestTarget: AI gave us a target that is already dead.");
targetStructure = visGetBlockingWall((BASE_OBJECT *)psDroid, bestTarget);
/* See if target is blocked by a wall; only affects direct weapons */
if (proj_Direct(asWeaponStats + psDroid->asWeaps[weapon_slot].nStat)
&& targetStructure)
{
//are we any good against walls?
if(asStructStrengthModifier[weaponEffect][targetStructure->pStructureType->strength] >= 100) //can attack atleast with default strength
{
bestTarget = (BASE_OBJECT *)targetStructure; //attack wall
}
}
if (targetOrigin)
{
*targetOrigin = tmpOrigin;
}
*ppsObj = bestTarget;
return bestMod;
}
return failure;
}
