// Checks for each unit to see if it could potentially be reached, and if so adds to the lists.
private void ScanForUnits()
{
//@todo Unit scan doesn't consider "faction" yet, in case you want to use it for player-friendly units as well
Unit currentUnit = unitManager.currentTurnUnit;
int maxDistance = currentUnit.unitStats.movementDistance + 6; //@todo Replace the +6 with the longest-range ability the unit has
// Getting Friendly units
//@todo only do so if the current AI unit has beneficial spells that can be cast on allies; do so during the
foreach (Unit attemptUnit in unitManager.tempEnemyUnitList)
{
if (currentUnit.Equals(attemptUnit)) // If the unit is itself
{
self = new OtherUnit(attemptUnit, 0, null, true);
friendlyUnits.Add(self);
continue;
}
int unitDistance = LandTileMap.instance.GetTileDistance(currentUnit.currentTile, attemptUnit.currentTile);
if (maxDistance >= unitDistance)
{
OtherUnit otherUnit;
LandTile [] pathTowards = LandTileMap.instance.RequestPath(currentUnit.currentTile, attemptUnit.currentTile, currentUnit.unitStats.canMoveDiagonally, false);
if (pathTowards.Length != 0 && pathTowards.Length <= currentUnit.unitStats.movementDistance)
{
otherUnit = new OtherUnit(attemptUnit, unitDistance, pathTowards, true);
}
else // No path or out of our movement range means there's no walkable path
{
otherUnit = new OtherUnit(attemptUnit, unitDistance, pathTowards);
}
friendlyUnits.Add(otherUnit);
}
}
// Getting Hostile units
foreach (Unit attemptUnit in unitManager.tempFriendlyUnitList)
{
int unitDistance = LandTileMap.instance.GetTileDistance(currentUnit.currentTile, attemptUnit.currentTile);
if (maxDistance >= unitDistance)
{
OtherUnit otherUnit;
LandTile [] pathTowards = LandTileMap.instance.RequestPath(currentUnit.currentTile, attemptUnit.currentTile, currentUnit.unitStats.canMoveDiagonally, false);
if (pathTowards.Length != 0 && pathTowards.Length <= currentUnit.unitStats.movementDistance)
{
otherUnit = new OtherUnit(attemptUnit, unitDistance, pathTowards, true);
}
else // No path or out of our movement range means there's no walkable path
{
otherUnit = new OtherUnit(attemptUnit, unitDistance, pathTowards);
}
enemyUnits.Add(otherUnit);
}
}
}
public AIAttackAction(OtherUnit targetUnit, int score, LandTile tileToMoveTo = null)
{
this.targetUnit = targetUnit;
this.score = score;
if (tileToMoveTo == null)
{
return;
}
this.tileToMoveTo = tileToMoveTo;
requiresMovement = true;
}
public AIAbilityAction(OtherUnit targetUnit, Ability abilityToUse, int score, LandTile tileToMoveTo = null)
{
this.targetUnit = targetUnit;
this.abilityToUse = abilityToUse;
this.score = score;
if (tileToMoveTo == null)
{
return;
}
this.tileToMoveTo = tileToMoveTo;
requiresMovement = true;
}
private LandTile FindPointToMoveTo()
{
//@todo Does adding a "is being threatened" tag to tiles improve this performance-wise?
//@todo Has the option of returning its current position
Unit currentUnit = unitManager.currentTurnUnit;
LandTile [] possibleTiles = LandTileMap.instance.RequestRange(currentUnit.transform.position, currentUnit.unitStats.movementDistance, currentUnit.unitStats.canMoveDiagonally, true, false, false);
if (possibleTiles.Length == 0)
{
return(null);
}
LandTile tileToMoveTo = null;
if (enemyUnits.Count != 0)
{
// Am I ranged/wizard? Move away from closest target
//@todo Find way of recognizing spellcasters/healers etc. Could be class-based, but not preferable. If Intelligence>Attack?
if (currentUnit.unitStats.attackRange > 1 || currentUnit.unitStats.intelligence > currentUnit.unitStats.attackPower)
{
int [] tileScores = new int [possibleTiles.Length];
int lowestValue = 9999;
int lowestIndex = 0;
for (int i = 0; i < possibleTiles.Length; i++) // Calculates the 'safest' spot by adding up the tile's distance to each enemy and picking the lowest
{
foreach (OtherUnit enemy in enemyUnits) //@todo Better ways to do this?
{
tileScores [i] += LandTileMap.instance.GetTileDistance(currentUnit.currentTile, enemy.unit.currentTile);
if (tileScores [i] < lowestValue)
{
lowestValue = tileScores [i];
lowestIndex = i;
}
}
}
return(tileToMoveTo = possibleTiles [lowestIndex]);
}
int lowestHealth = 9999;
OtherUnit lowestHealthEnemy = null;
// Scan for lowest health enemy, move towards that one
foreach (OtherUnit enemy in enemyUnits)
{
if (enemy.canReach && enemy.unit.unitStats.currentHealth < lowestHealth)
{
LandTile testingTile = enemy.pathToTarget [Mathf.Clamp(enemy.pathToTarget.Length - 2, 0, enemy.pathToTarget.Length - 1)];
if ((possibleTiles.Contains <LandTile> (testingTile) || currentUnit.currentTile == testingTile) && testingTile.unitOnTile == null)
{
lowestHealthEnemy = enemy;
lowestHealth = enemy.unit.unitStats.currentHealth;
}
}
}
if (lowestHealthEnemy != null)
{
if (LandTileMap.instance.GetTileDistance(currentUnit.currentTile, lowestHealthEnemy.unit.currentTile) < currentUnit.unitStats.attackRange)
{
return(null); // if we're already in range of the lowest health unit; we don't have to move.
}
else
{
return(tileToMoveTo = lowestHealthEnemy.pathToTarget [Mathf.Clamp(lowestHealthEnemy.pathToTarget.Length - 2, 0, lowestHealthEnemy.pathToTarget.Length)]);
}
}
// If there were no possible enemies to path to, move in the general direction of one
//@todo doesn't consider movement costs yet
if (tileToMoveTo == null)
{
for (int i = 0; i < enemyUnits.Count - 1; i++)
{
int random = Random.Range(i, enemyUnits.Count);
if (enemyUnits [random].pathToTarget != null && enemyUnits[random].pathToTarget.Length != 0)
{
tileToMoveTo = enemyUnits [random].pathToTarget [Mathf.Clamp(currentUnit.unitStats.movementDistance, 0, enemyUnits [random].pathToTarget.Length - 1)];
break;
}
}
}
}
// If all else fails, pick a random tile within movement range
if (tileToMoveTo == null)
{
tileToMoveTo = possibleTiles [Random.Range(0, possibleTiles.Length - 1)];
}
return(tileToMoveTo);
}
