//analyse the grid to know where the unit should move to
private Tile Analyse(Unit unit, _AIMode activeMode)
{
//get all wakable tiles in range first
List <Tile> walkableTilesInRange = GridManager.GetTilesWithinDistance(unit.tile, unit.GetEffectiveMoveRange(), true);
walkableTilesInRange.Add(unit.tile);
//get all visible hostile
List <Unit> allHostileInSight = FactionManager.GetAllHostileUnit(unit.factionID);
if (GameControl.EnableFogOfWar())
{
for (int i = 0; i < allHostileInSight.Count; i++)
{
if (!FogOfWar.IsTileVisibleToFaction(allHostileInSight[i].tile, unit.factionID))
{
allHostileInSight.RemoveAt(i); i -= 1;
}
}
}
//if cover system is in used
if (GameControl.EnableCover())
{
Tile tile = AnalyseCoverSystem(unit, walkableTilesInRange, allHostileInSight);
if (tile != null)
{
return(tile);
}
}
//if there are hostile
if (allHostileInSight.Count > 0)
{
//fill up the walkableTilesInRange hostile list
//then filter thru walkableTilesInRange, those that have a hostile in range will be add to a tilesWithHostileInRange
List <Tile> tilesWithHostileInRange = new List <Tile>();
GridManager.SetupHostileInRangeforTile(unit, walkableTilesInRange);
for (int i = 0; i < walkableTilesInRange.Count; i++)
{
if (walkableTilesInRange[i].GetHostileInRange().Count > 0)
{
tilesWithHostileInRange.Add(walkableTilesInRange[i]);
}
}
//if the tilesWithHostileInRange is not empty after the process, means there's tiles which the unit can move into and attack
//return one of those in the tilesWithHostileInRange so the unit can attack
if (tilesWithHostileInRange.Count > 0)
{
//if the unit current tile is one of those tiles with hostile, just stay put and attack
if (tilesWithHostileInRange.Contains(unit.tile))
{
//randomize it a bit so the unit do move around but not stay in place all the time
if (Random.Range(0f, 1f) > 0.25f)
{
return(unit.tile);
}
}
return(tilesWithHostileInRange[Random.Range(0, tilesWithHostileInRange.Count)]);
}
}
//if there's not potential target at all, check if the unit has any previous attacker
//if there are, go after the last attacker
if (unit.lastAttacker != null)
{
return(unit.lastAttacker.tile);
}
//for aggresive mode with FogOfWar disabled, try move towards the nearest unit
if (activeMode == _AIMode.Aggressive && Random.Range(0f, 1f) > 0.25f)
{
List <Unit> allHostile = FactionManager.GetAllHostileUnit(unit.factionID);
float nearest = Mathf.Infinity; int nearestIndex = 0;
for (int i = 0; i < allHostile.Count; i++)
{
float dist = GridManager.GetDistance(allHostile[i].tile, unit.tile);
if (dist < nearest)
{
nearest = dist;
nearestIndex = i;
}
}
return(allHostile[nearestIndex].tile);
}
//if there's really no hostile to go after, then just move randomly in one of the walkable
int rand = Random.Range(0, walkableTilesInRange.Count);
//clear in hostileInRange list for all moveable tile so, just in case the list is not empty (hostileInRange dont clear after each move)
//so the unit dont try to attack anything when it moves into the targetTile
walkableTilesInRange[rand].SetHostileInRange(new List <Tile>());
return(walkableTilesInRange[rand]);
}
