/*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);
for (psViewer = apsSensorList[0]; psViewer; psViewer = psViewer->psNextFunc)
{
if (aiCheckAlliances(psTarget->player, psViewer->player))
{
if ((psViewer->type == OBJ_STRUCTURE && !structCBSensor((STRUCTURE *)psViewer))
|| (psViewer->type == OBJ_DROID && !cbSensorDroid((DROID *)psViewer)))
{
continue;
}
const int sensorRange = objSensorRange(psViewer);
// Check sensor distance from target
const int xDiff = psViewer->pos.x - psTarget->pos.x;
const int yDiff = psViewer->pos.y - 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;
}
}
}
}
}
static int aiDroidRange(DROID *psDroid, int weapon_slot)
{
int32_t longRange;
if (psDroid->droidType == DROID_SENSOR)
{
longRange = objSensorRange(psDroid);
}
else if (psDroid->numWeaps == 0 || psDroid->asWeaps[0].nStat == 0)
{
// Can't attack without a weapon
return 0;
}
else
{
WEAPON_STATS *psWStats = psDroid->asWeaps[weapon_slot].nStat + asWeaponStats;
longRange = proj_GetLongRange(psWStats, psDroid->player);
}
return longRange;
}
/* The terrain revealing ray callback */
static void doWaveTerrain(const BASE_OBJECT *psObj, TILEPOS *recordTilePos, int *lastRecordTilePos)
{
const int sx = psObj->pos.x;
const int sy = psObj->pos.y;
const int sz = psObj->pos.z + MAX(MIN_VIS_HEIGHT, psObj->sDisplay.imd->max.y);
const unsigned radius = objSensorRange(psObj);
const int rayPlayer = psObj->player;
size_t i;
size_t size;
const WavecastTile *tiles = getWavecastTable(radius, &size);
int tileHeight, perspectiveHeight, perspectiveHeightLeeway;
#define MAX_WAVECAST_LIST_SIZE 1360 // Trivial upper bound to what a fully upgraded WSS can use (its number of angles). Should probably be some factor times the maximum possible radius. Is probably a lot more than needed. Tested to need at least 180.
int heights[2][MAX_WAVECAST_LIST_SIZE];
int angles[2][MAX_WAVECAST_LIST_SIZE + 1];
int readListSize = 0, readListPos = 0, writeListPos = 0; // readListSize, readListPos dummy initialisations.
int readList = 0; // Reading from this list, writing to the other. Could also initialise to rand()%2.
int lastHeight = 0; // lastHeight dummy initialisation.
int lastAngle = 0x7FFFFFFF;
// Start with full vision of all angles. (If someday wanting to make droids that can only look in one direction, change here, after getting the original angle values saved in the wavecast table.)
heights[!readList][writeListPos] = -0x7FFFFFFF-1; // Smallest integer.
angles[!readList][writeListPos] = 0; // Smallest angle.
++writeListPos;
for (i = 0; i < size; ++i)
{
const int mapX = map_coord(sx) + tiles[i].dx;
const int mapY = map_coord(sy) + tiles[i].dy;
MAPTILE *psTile;
bool seen = false;
if (mapX < 0 || mapX >= mapWidth || mapY < 0 || mapY >= mapHeight)
{
continue;
}
psTile = mapTile(mapX, mapY);
tileHeight = psTile->height;
perspectiveHeight = (tileHeight - sz) * tiles[i].invRadius;
perspectiveHeightLeeway = (tileHeight - sz + MIN_VIS_HEIGHT) * tiles[i].invRadius;
if (tiles[i].angBegin < lastAngle)
{
// Gone around the circle. (Or just started scan.)
angles[!readList][writeListPos] = lastAngle;
// Flip the lists.
readList = !readList;
readListPos = 0;
readListSize = writeListPos;
writeListPos = 0;
lastHeight = 1; // Impossible value since tiles[i].invRadius > 1 for all i, so triggers writing first entry in list.
}
lastAngle = tiles[i].angEnd;
while (angles[readList][readListPos + 1] <= tiles[i].angBegin && readListPos < readListSize)
{
++readListPos; // Skip, not relevant.
}
while (angles[readList][readListPos] < tiles[i].angEnd && readListPos < readListSize)
{
int oldHeight = heights[readList][readListPos];
int newHeight = MAX(oldHeight, perspectiveHeight);
seen = seen || perspectiveHeightLeeway >= oldHeight; // consider point slightly above ground in case there is something on the tile
if (newHeight != lastHeight)
{
heights[!readList][writeListPos] = newHeight;
angles[!readList][writeListPos] = MAX(angles[readList][readListPos], tiles[i].angBegin);
lastHeight = newHeight;
++writeListPos;
ASSERT_OR_RETURN( , writeListPos <= MAX_WAVECAST_LIST_SIZE, "Visibility too complicated! Need to increase MAX_WAVECAST_LIST_SIZE.");
}
++readListPos;
}
--readListPos;
if (seen)
{
// Can see this tile.
psTile->tileExploredBits |= alliancebits[rayPlayer]; // Share exploration with allies too
visMarkTile(psObj, mapX, mapY, psTile, recordTilePos, lastRecordTilePos); // Mark this tile as seen by our sensor
}
}
/* 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;
}
/* See if there is a target in range */
bool aiChooseTarget(BASE_OBJECT *psObj, BASE_OBJECT **ppsTarget, int weapon_slot, bool bUpdateTarget, TARGET_ORIGIN *targetOrigin)
{
BASE_OBJECT *psTarget = NULL;
DROID *psCommander;
SDWORD curTargetWeight = -1;
TARGET_ORIGIN tmpOrigin = ORIGIN_UNKNOWN;
if (targetOrigin)
{
*targetOrigin = ORIGIN_UNKNOWN;
}
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)
{
return false; // Can't target without a weapon or sensor
}
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);
/* 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))
{
ASSERT(!isDead(psTarget), "Droid found a dead target!");
*ppsTarget = psTarget;
return true;
}
}
else if (psObj->type == OBJ_STRUCTURE)
{
WEAPON_STATS *psWStats = NULL;
bool bCommanderBlock = false;
ASSERT(((STRUCTURE *)psObj)->asWeaps[weapon_slot].nStat > 0, "no weapons on structure");
psWStats = ((STRUCTURE *)psObj)->asWeaps[weapon_slot].nStat + asWeaponStats;
int longRange = proj_GetLongRange(psWStats, psObj->player);
// 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
&& !psCommander->psActionTarget[0]->died)
{
// 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
if (psTarget == NULL && !bCommanderBlock && !proj_Direct(psWStats))
{
psTarget = aiSearchSensorTargets(psObj, weapon_slot, psWStats, &tmpOrigin);
}
if (psTarget == NULL && !bCommanderBlock)
{
int targetValue = -1;
int tarDist = INT32_MAX;
int srange = longRange;
if (!proj_Direct(psWStats) && srange > objSensorRange(psObj))
{
// search radius of indirect weapons limited by their sight, unless they use
// external sensors to provide fire designation
srange = objSensorRange(psObj);
}
static GridList gridList; // static to avoid allocations.
gridList = gridStartIterate(psObj->pos.x, psObj->pos.y, srange);
for (GridIterator gi = gridList.begin(); gi != gridList.end(); ++gi)
{
BASE_OBJECT *psCurr = *gi;
/* Check that it is a valid target */
if (psCurr->type != OBJ_FEATURE && !psCurr->died
&& !aiCheckAlliances(psCurr->player, psObj->player)
&& validTarget(psObj, psCurr, weapon_slot) && psCurr->visible[psObj->player] == UBYTE_MAX
&& aiStructHasRange((STRUCTURE *)psObj, psCurr, weapon_slot))
{
int newTargetValue = targetAttackWeight(psCurr, psObj, weapon_slot);
// See if in sensor range and visible
int distSq = objPosDiffSq(psCurr->pos, psObj->pos);
if (newTargetValue < targetValue || (newTargetValue == targetValue && distSq >= tarDist))
{
continue;
}
tmpOrigin = ORIGIN_VISUAL;
psTarget = psCurr;
tarDist = distSq;
targetValue = newTargetValue;
}
}
}
if (psTarget)
{
ASSERT(!psTarget->died, "Structure found a dead target!");
if (targetOrigin)
{
*targetOrigin = tmpOrigin;
}
*ppsTarget = psTarget;
return true;
}
}
return false;
}
// Find the best nearest target for a droid.
// If extraRange is higher than zero, then this is the range it accepts for movement to target.
// Returns integer representing target priority, -1 if failed
int aiBestNearestTarget(DROID *psDroid, BASE_OBJECT **ppsObj, int weapon_slot, int extraRange)
{
SDWORD bestMod = 0, newMod, failure = -1;
BASE_OBJECT *psTarget = NULL, *bestTarget = NULL, *tempTarget;
bool electronic = false;
STRUCTURE *targetStructure;
WEAPON_EFFECT weaponEffect;
TARGET_ORIGIN tmpOrigin = 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 = psDroid->asWeaps[weapon_slot].nStat + asWeaponStats;
bestTarget = aiSearchSensorTargets((BASE_OBJECT *)psDroid, weapon_slot, psWStats, &tmpOrigin);
bestMod = targetAttackWeight(bestTarget, (BASE_OBJECT *)psDroid, weapon_slot);
}
weaponEffect = (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.
int droidRange = std::min(aiDroidRange(psDroid, weapon_slot) + extraRange, objSensorRange(psDroid) + 6 * TILE_UNITS);
static GridList gridList; // static to avoid allocations.
gridList = gridStartIterate(psDroid->pos.x, psDroid->pos.y, droidRange);
for (GridIterator gi = gridList.begin(); gi != gridList.end(); ++gi)
{
BASE_OBJECT *friendlyObj = NULL;
BASE_OBJECT *targetInQuestion = *gi;
/* 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] == UBYTE_MAX)
{
if (friendlyObj->type == OBJ_DROID)
{
DROID *friendlyDroid = (DROID *)friendlyObj;
/* See if friendly droid has a target */
tempTarget = friendlyDroid->psActionTarget[0];
if (tempTarget && !tempTarget->died)
{
//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.type != DORDER_ATTACK)
{
targetInQuestion = tempTarget; //consider this target
}
}
}
}
else if (friendlyObj->type == OBJ_STRUCTURE)
{
tempTarget = ((STRUCTURE *)friendlyObj)->psTarget[0];
if (tempTarget && !tempTarget->died)
{
targetInQuestion = tempTarget;
}
}
}
}
if (targetInQuestion != NULL
&& targetInQuestion != 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] == UBYTE_MAX
&& !aiCheckAlliances(targetInQuestion->player, psDroid->player)
&& validTarget(psDroid, targetInQuestion, weapon_slot)
&& objPosDiffSq(psDroid, targetInQuestion) < droidRange * droidRange)
{
if (targetInQuestion->type == OBJ_DROID)
{
// in multiPlayer - don't attack Transporters with EW
if (bMultiPlayer)
{
// if not electronic then valid target
if (!electronic
|| (electronic
&& !isTransporter((DROID *)targetInQuestion)))
{
//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[0].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
&& psDroid->lastFrustratedTime > 0
&& gameTime - psDroid->lastFrustratedTime < FRUSTRATED_TIME
&& ((FEATURE *)targetInQuestion)->psStats->damageable
&& psDroid->player != scavengerPlayer()) // hack to avoid scavs blowing up their nice feature walls
{
psTarget = targetInQuestion;
objTrace(psDroid->id, "considering shooting at %s in frustration", objInfo(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, "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
}
}
*ppsObj = bestTarget;
return bestMod;
}
return failure;
}
/* Calculates attack priority for a certain target */
static SDWORD targetAttackWeight(BASE_OBJECT *psTarget, BASE_OBJECT *psAttacker, SDWORD weapon_slot)
{
SDWORD targetTypeBonus = 0, damageRatio = 0, attackWeight = 0, noTarget = -1;
UDWORD weaponSlot;
DROID *targetDroid = NULL, *psAttackerDroid = NULL, *psGroupDroid, *psDroid;
STRUCTURE *targetStructure = NULL;
WEAPON_EFFECT weaponEffect;
WEAPON_STATS *attackerWeapon;
bool bEmpWeap = false, bCmdAttached = false, bTargetingCmd = false, bDirect = false;
if (psTarget == NULL || psAttacker == NULL || psTarget->died)
{
return noTarget;
}
ASSERT(psTarget != psAttacker, "targetAttackWeight: Wanted to evaluate the worth of attacking ourselves...");
targetTypeBonus = 0; //Sensors/ecm droids, non-military structures get lower priority
/* Get attacker weapon effect */
if (psAttacker->type == OBJ_DROID)
{
psAttackerDroid = (DROID *)psAttacker;
attackerWeapon = (WEAPON_STATS *)(asWeaponStats + psAttackerDroid->asWeaps[weapon_slot].nStat);
//check if this droid is assigned to a commander
bCmdAttached = hasCommander(psAttackerDroid);
//find out if current target is targeting our commander
if (bCmdAttached)
{
if (psTarget->type == OBJ_DROID)
{
psDroid = (DROID *)psTarget;
//go through all enemy weapon slots
for (weaponSlot = 0; !bTargetingCmd &&
weaponSlot < ((DROID *)psTarget)->numWeaps; weaponSlot++)
{
//see if this weapon is targeting our commander
if (psDroid->psActionTarget[weaponSlot] == (BASE_OBJECT *)psAttackerDroid->psGroup->psCommander)
{
bTargetingCmd = true;
}
}
}
else
{
if (psTarget->type == OBJ_STRUCTURE)
{
//go through all enemy weapons
for (weaponSlot = 0; !bTargetingCmd && weaponSlot < ((STRUCTURE *)psTarget)->numWeaps; weaponSlot++)
{
if (((STRUCTURE *)psTarget)->psTarget[weaponSlot] ==
(BASE_OBJECT *)psAttackerDroid->psGroup->psCommander)
{
bTargetingCmd = true;
}
}
}
}
}
}
else if (psAttacker->type == OBJ_STRUCTURE)
{
attackerWeapon = ((WEAPON_STATS *)(asWeaponStats + ((STRUCTURE *)psAttacker)->asWeaps[weapon_slot].nStat));
}
else /* feature */
{
ASSERT(!"invalid attacker object type", "targetAttackWeight: Invalid attacker object type");
return noTarget;
}
bDirect = proj_Direct(attackerWeapon);
if (psAttacker->type == OBJ_DROID && psAttackerDroid->droidType == DROID_SENSOR)
{
// Sensors are considered a direct weapon,
// but for computing expected damage it makes more sense to use indirect damage
bDirect = false;
}
//Get weapon effect
weaponEffect = attackerWeapon->weaponEffect;
//See if attacker is using an EMP weapon
bEmpWeap = (attackerWeapon->weaponSubClass == WSC_EMP);
int dist = iHypot(removeZ(psAttacker->pos - psTarget->pos));
bool tooClose = dist <= attackerWeapon->upgrade[psAttacker->player].minRange;
if (tooClose)
{
dist = objSensorRange(psAttacker); // If object is too close to fire at, consider it to be at maximum range.
}
/* Calculate attack weight */
if (psTarget->type == OBJ_DROID)
{
targetDroid = (DROID *)psTarget;
if (targetDroid->died)
{
debug(LOG_NEVER, "Target droid is dead, skipping invalid droid.\n");
return noTarget;
}
/* Calculate damage this target suffered */
if (targetDroid->originalBody == 0) // FIXME Somewhere we get 0HP droids from
{
damageRatio = 0;
debug(LOG_ERROR, "targetAttackWeight: 0HP droid detected!");
debug(LOG_ERROR, " Type: %i Name: \"%s\" Owner: %i \"%s\")",
targetDroid->droidType, targetDroid->aName, targetDroid->player, getPlayerName(targetDroid->player));
}
else
{
damageRatio = 100 - 100 * targetDroid->body / targetDroid->originalBody;
}
assert(targetDroid->originalBody != 0); // Assert later so we get the info from above
/* See if this type of a droid should be prioritized */
switch (targetDroid->droidType)
{
case DROID_SENSOR:
case DROID_ECM:
case DROID_PERSON:
case DROID_TRANSPORTER:
case DROID_SUPERTRANSPORTER:
case DROID_DEFAULT:
case DROID_ANY:
break;
case DROID_CYBORG:
case DROID_WEAPON:
case DROID_CYBORG_SUPER:
targetTypeBonus = WEIGHT_WEAPON_DROIDS;
break;
case DROID_COMMAND:
targetTypeBonus = WEIGHT_COMMAND_DROIDS;
break;
case DROID_CONSTRUCT:
case DROID_REPAIR:
case DROID_CYBORG_CONSTRUCT:
case DROID_CYBORG_REPAIR:
targetTypeBonus = WEIGHT_SERVICE_DROIDS;
break;
}
/* Now calculate the overall weight */
attackWeight = asWeaponModifier[weaponEffect][(asPropulsionStats + targetDroid->asBits[COMP_PROPULSION])->propulsionType] // Our weapon's effect against target
+ asWeaponModifierBody[weaponEffect][(asBodyStats + targetDroid->asBits[COMP_BODY])->size]
+ WEIGHT_DIST_TILE_DROID * objSensorRange(psAttacker) / TILE_UNITS
- WEIGHT_DIST_TILE_DROID * dist / TILE_UNITS // farther droids are less attractive
+ WEIGHT_HEALTH_DROID * damageRatio / 100 // we prefer damaged droids
+ targetTypeBonus; // some droid types have higher priority
/* If attacking with EMP try to avoid targets that were already "EMPed" */
if (bEmpWeap &&
(targetDroid->lastHitWeapon == WSC_EMP) &&
((gameTime - targetDroid->timeLastHit) < EMP_DISABLE_TIME)) //target still disabled
{
attackWeight /= EMP_DISABLED_PENALTY_F;
}
}
else if (psTarget->type == OBJ_STRUCTURE)
{
targetStructure = (STRUCTURE *)psTarget;
/* Calculate damage this target suffered */
damageRatio = 100 - 100 * targetStructure->body / structureBody(targetStructure);
/* See if this type of a structure should be prioritized */
switch (targetStructure->pStructureType->type)
{
case REF_DEFENSE:
targetTypeBonus = WEIGHT_WEAPON_STRUCT;
break;
case REF_RESOURCE_EXTRACTOR:
targetTypeBonus = WEIGHT_DERRICK_STRUCT;
break;
case REF_FACTORY:
case REF_CYBORG_FACTORY:
case REF_REPAIR_FACILITY:
targetTypeBonus = WEIGHT_MILITARY_STRUCT;
break;
default:
break;
}
/* Now calculate the overall weight */
attackWeight = asStructStrengthModifier[weaponEffect][targetStructure->pStructureType->strength] // Our weapon's effect against target
+ WEIGHT_DIST_TILE_STRUCT * objSensorRange(psAttacker) / TILE_UNITS
- WEIGHT_DIST_TILE_STRUCT * dist / TILE_UNITS // farther structs are less attractive
+ WEIGHT_HEALTH_STRUCT * damageRatio / 100 // we prefer damaged structures
+ targetTypeBonus; // some structure types have higher priority
/* Go for unfinished structures only if nothing else found (same for non-visible structures) */
if (targetStructure->status != SS_BUILT) //a decoy?
{
attackWeight /= WEIGHT_STRUCT_NOTBUILT_F;
}
/* EMP should only attack structures if no enemy droids are around */
if (bEmpWeap)
{
attackWeight /= EMP_STRUCT_PENALTY_F;
}
}
else //a feature
{
return 1;
}
/* We prefer objects we can see and can attack immediately */
if (!visibleObject((BASE_OBJECT *)psAttacker, psTarget, true))
{
attackWeight /= WEIGHT_NOT_VISIBLE_F;
}
if (tooClose)
{
attackWeight /= TOO_CLOSE_PENALTY_F;
}
/* Penalty for units that are already considered doomed (but the missile might miss!) */
if (aiObjectIsProbablyDoomed(psTarget, bDirect))
{
/* indirect firing units have slow reload times, so give the target a chance to die,
* and give a different unit a chance to get in range, too. */
if (weaponROF(attackerWeapon, psAttacker->player) < TARGET_DOOMED_SLOW_RELOAD_T)
{
debug(LOG_NEVER, "Not killing unit - doomed. My ROF: %i (%s)", weaponROF(attackerWeapon, psAttacker->player), getName(attackerWeapon));
return noTarget;
}
attackWeight /= TARGET_DOOMED_PENALTY_F;
}
/* Commander-related criterias */
if (bCmdAttached) //attached to a commander and don't have a target assigned by some order
{
ASSERT(psAttackerDroid->psGroup->psCommander != NULL, "Commander is NULL");
//if commander is being targeted by our target, try to defend the commander
if (bTargetingCmd)
{
attackWeight += WEIGHT_CMD_RANK * (1 + getDroidLevel(psAttackerDroid->psGroup->psCommander));
}
//fire support - go through all droids assigned to the commander
for (psGroupDroid = psAttackerDroid->psGroup->psList; psGroupDroid; psGroupDroid = psGroupDroid->psGrpNext)
{
for (weaponSlot = 0; weaponSlot < psGroupDroid->numWeaps; weaponSlot++)
{
//see if this droid is currently targeting current target
if (psGroupDroid->order.psObj == psTarget ||
psGroupDroid->psActionTarget[weaponSlot] == psTarget)
{
//we prefer targets that are already targeted and hence will be destroyed faster
attackWeight += WEIGHT_CMD_SAME_TARGET;
}
}
}
}
return std::max<int>(1, attackWeight);
}
