/*
* ExecuteMovementGivenTarget
*
* given a target to move towards, find the
* closest tile and move that way
*
* @param Unit unit - the unit that is undergoing the movement
* @param Vector3 target - the vector to optimistically move towards
* @returns void
*/
public void ExecuteMovementGivenTarget(Unit unit, Vector3 target)
{
//get a list of walkable tiles around the unit
List <Tiles> walkable = GetArea.GetAreaOfSafeMoveable(map.GetTileAtPos(unit.transform.position), unit.movementPoints, map, unit);
//worst possible score to start
float bestMoveScore = float.MaxValue;
//reference to the best tile that has been found
Tiles bestTargetTile = null;
//get the size of the walkable list
int walkSize = walkable.Count;
//iterate through all walkable tiles
for (int i = 0; i < walkSize; i++)
{
//store in a temp variable
Tiles tile = walkable[i];
//get the squared distance to the tile
float sqrDistance = (tile.transform.position - target).sqrMagnitude;
if (sqrDistance < bestMoveScore && tile.unit == null)
{
//bestTargetTile the best score
bestTargetTile = tile;
bestMoveScore = sqrDistance;
}
}
//move towards the best tile if one was found
if (bestTargetTile != null)
{
Move(unit, bestTargetTile.pos);
}
}
/*
* Update
* overrides UnitCommand's Update()
*
* called once per frame while the command is active
*
* @returns void
*/
public override void Update()
{
if (m_tilePath == null)
{
//get the start and end of the path
Tiles startingTile = map.GetTileAtPos(unit.transform.position);
startingTile.unit = null;
//get the tile path to follow
if (isSafeMove)
{
m_tilePath = AStar.GetSafeAStarPath(startingTile, endTile, unit, GetArea.GetAreaOfSafeMoveable(startingTile, unit.movementPoints, map, unit));
}
else
{
m_tilePath = AStar.GetAStarPath(startingTile, endTile, unit);
}
//the path is clear, and the unit can move there
if (m_tilePath.Count > 0 && m_tilePath.Count <= unit.movementPoints)
{
//subtract the path distance from the movement points
unit.movementPoints -= m_tilePath.Count;
startingTile.unit = null;
endTile.unit = unit;
}
else
{
//Stop walking Anim
if (unit.ArtLink != null)
{
unit.ArtLink.SetBool("IsWalking", false);
}
//the path failed
startingTile.unit = unit;
failedCallback();
return;
}
}
m_timer += Time.deltaTime;
//check if there is still a path to follow
if (m_tilePath.Count > 0 && m_timer > m_waitTime)
{
if (m_finishedWaiting == false)
{
m_finishedWaiting = true;
if (unit.ArtLink != null)
{
unit.ArtLink.SetBool("IsWalking", true);
}
}
//get the next position to go to
Tiles nextTile = m_tilePath[0];
//the 3D target of the movement
Vector3 target = new Vector3(nextTile.pos.x, 0.15f, nextTile.pos.z);
Vector3 relative = target - unit.transform.position;
if (relative.magnitude < unit.movementSpeed * Time.deltaTime)
{
//this is a healing tile, heal the unit
if (nextTile.IsHealing(false, unit))
{
unit.Heal(GameManagment.stats.tileHealthGained);
}
//this is a trap tile, it could kill the unit
if (nextTile.tileType == eTileType.PLACABLETRAP || nextTile.tileType == eTileType.DAMAGE)
{
m_timer = 0;
m_finishedWaiting = false;
if (unit.ArtLink != null)
{
unit.ArtLink.SetTrigger("TakeDamage");
}
unit.Defend(GameManagment.stats.trapTileDamage);
//explosion is required
if (nextTile.tileType == eTileType.PLACABLETRAP)
{
//reset the explosion
ParticleLibrary.explosionSystem.transform.position = nextTile.transform.position;
ParticleLibrary.explosionSystem.time = 0.0f;
ParticleLibrary.explosionSystem.Play();
}
//Stop walking Anim
if (unit.ArtLink != null)
{
unit.ArtLink.SetBool("IsWalking", false);
}
}
unit.transform.position = target;
m_tilePath.RemoveAt(0);
if (unit.playerID == 0)
{
StatisticsTracker.tilesCrossed++;
}
}
else
{
unit.transform.position += relative.normalized * unit.movementSpeed * Time.deltaTime;
}
}
else if (m_timer > m_waitTime)
{
if (endTile.tileType == eTileType.PLACABLEDEFENSE || endTile.tileType == eTileType.DEFENSE)
{
//defensive buff
endTile.unit.armour = endTile.unit.baseArmour + 1;
}
else
{
//remove the defensive buff
endTile.unit.armour = endTile.unit.baseArmour;
}
successCallback();
//Stop walking Anim
if (unit.ArtLink != null)
{
unit.ArtLink.SetBool("IsWalking", false);
}
return;
}
}
