/// <summary>
/// Updates the shadow's size and position at every frame
/// </summary>
protected virtual void Update()
{
// vertical raycast below the agent
_hit = CorgiTools.CorgiRayCast(transform.position, Vector2.down, _rayLength, GroundMask, true, Color.red);
if (_hit)
{
_shadow.GetComponent <Renderer>().enabled = true;
// updates the shadow's position according to the hit
_shadow.transform.position = new Vector2(_hit.point.x, _hit.point.y);
_shadow.transform.position += ShadowOffset;
// handles horizontal offset based on the ground/object distance.
float distance = _shadow.transform.position.y - transform.position.y + GetComponent <Renderer>().bounds.size.y / 2;
_shadowOffsetBasedOnHeight = (ShadowMaxHorizontalDistance / (Mathf.Abs(MaximumVerticalDistance / distance))) * Vector3.right;
_shadow.transform.position += _shadowOffsetBasedOnHeight;
// prevents the shadow from rotating
_shadow.transform.rotation = Quaternion.identity;
// updates the size of the shadow based on the distance between the agent and the ground
_shadow.transform.localScale = _initialScale / (_initialScale.x + Mathf.Abs(distance / 2));
}
else
{
// if the raycast didn't hit anything (the object is not above solid ground), we just hide the shadow
_shadow.GetComponent <Renderer>().enabled = false;
}
}
/// <summary>
/// Creates the initial shadow
/// </summary>
protected virtual void Initialize()
{
// we throw a raycast below the character and position the shadow accordingly
_hit = CorgiTools.CorgiRayCast(transform.position, Vector2.down, _rayLength, GroundMask, true, Color.red);
_shadow = (GameObject)Instantiate(ShadowPrefab, _hit.point, Quaternion.identity);
_shadow.transform.parent = this.transform;
_initialScale = _shadow.transform.localScale;
}
// On enable, we cast rays above and below the object to check for obstacles
protected virtual void OnEnable()
{
RaycastHit2D raycastUpwards = CorgiTools.CorgiRayCast(transform.position, Vector2.up, RaycastLength, 1 << LayerMask.NameToLayer("Ground"), true, Color.gray);
RaycastHit2D raycastDownwards = CorgiTools.CorgiRayCast(transform.position, Vector2.up, RaycastLength, 1 << LayerMask.NameToLayer("Ground"), true, Color.gray);
// if we see an obstacle, we reposition the object
if (raycastUpwards)
{
Reposition(raycastUpwards.collider.transform.position);
}
if (raycastDownwards)
{
Reposition(raycastDownwards.collider.transform.position);
}
}