private SpawnCell GetClosestCell()
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
int layerMask = 1 << LayerMask.NameToLayer("Ground");
if (Physics.Raycast(ray, out hit, maxDistance: 300.0f, layerMask: layerMask))
{
hitPosition = hit.point;
if (!placementVolume.bounds.Contains(hitPosition))
{
hitPosition = placementVolume.bounds.ClosestPoint(hitPosition);
}
//now we'll look for objects within a radius, and find the closest object with CellScript
SpawnCell closestCell = null;
float closestDist = visibilityRadius + 1.0f;
Collider[] hitColliders = Physics.OverlapSphere(hitPosition, visibilityRadius);
for (int i = 0; i < hitColliders.Length; i++)
{
SpawnCell foundCell = hitColliders[i].GetComponent <SpawnCell>();
if (foundCell != null)
{
float dist = (foundCell.transform.position - hitPosition).magnitude;
if (dist < closestDist)
{
closestCell = foundCell;
closestDist = dist;
}
}
}
return(closestCell);
}
return(null);
}
// Update is called once per frame
void Update()
{
SpawnCell closest;
switch (placementState)
{
case PlacementState.Begin:
spawnCell = GetClosestCell();
if (placementVolume.bounds.Contains(hitPosition))
{
moveTarget.position = hitPosition + new Vector3(0.0f, dragHeight, 0.0f);
if (Input.GetMouseButtonUp(0) && spawnCell)
{
OnMouseUp();
}
}
break;
case PlacementState.StartDrag:
closest = GetClosestCell();
if (closest != spawnCell && placementVolume.bounds.Contains(hitPosition))
{
spawnCell.SetItem(null);
spawnCell = closest;
placementState = PlacementState.Dragged;
SendMessage("OnDrag", SendMessageOptions.DontRequireReceiver);
Vector3 targetPosition = hitPosition + new Vector3(0.0f, dragHeight, 0.0f);
moveTarget.position = targetPosition;
}
break;
case PlacementState.Dragged:
spawnCell = GetClosestCell();
moveTarget.position = hitPosition + new Vector3(0.0f, dragHeight, 0.0f);
break;
case PlacementState.Placed:
break;
case PlacementState.Invalid:
if (CanPlace())
{
placementState = PlacementState.Placed;
moveTarget.position = spawnCell.transform.position;
SendMessage("OnPlace", SendMessageOptions.DontRequireReceiver);
}
break;
default:
break;
}
}