Vector3 PetFaceDirectionToVector(PetFaceDirection faceDirection)
{
switch (faceDirection)
{
case PetFaceDirection.UP:
return(transform.up);
case PetFaceDirection.DOWN:
return(-transform.up);
case PetFaceDirection.LEFT:
return(-transform.right);
case PetFaceDirection.RIGHT:
return(transform.right);
case PetFaceDirection.FORWARD:
return(transform.forward);
case PetFaceDirection.BACK:
return(-transform.forward);
}
throw new Exception("Invalid facedirection: " + faceDirection.ToString());
}
/// <summary>
/// Finds the closest cube face to the given position, excluding the ones facing the top and bottom
/// </summary>
/// <param name="position"></param>
/// <returns>PetFaceDirection representing the face side</returns>
PetFaceDirection GetClosestFacePosition(Vector3 position)
{
Vector3 closestDirection = Vector3.zero;
PetFaceDirection closestFaceDirection = 0;
// highest dot product of direction vector to position is most in line with item
float highestDotProduct = -1;
// iterate all the values of PetFaceDirection (up,down,left, right etc)
for (int i = 0; i < System.Enum.GetValues(typeof(PetFaceDirection)).Length; i++)
{
PetFaceDirection petFaceDirection = (PetFaceDirection)i;
// convert a face direction to a world space direction from that face
Vector3 potentialDirection = PetFaceDirectionToVector(petFaceDirection);
// If this direction points up or down, skip it
if (Vector3.Dot(potentialDirection, Vector3.up) > 0.5f)
{
continue;
}
if (Vector3.Dot(potentialDirection, Vector3.down) > 0.5f)
{
continue;
}
float dot = Vector3.Dot(potentialDirection, position - this.transform.position);
if (dot > highestDotProduct)
{
highestDotProduct = dot;
closestFaceDirection = petFaceDirection;
closestDirection = potentialDirection;
}
}
return(closestFaceDirection);
}
void FixedUpdate()
{
if (isHoldingObject)
{
// if the holding face is pointing up or down, find a horizontal one
// for example, if the cube fell over whilst holding
if (Vector3.Dot(_holdDirection, Vector3.up) > 0.5f || Vector3.Dot(_holdDirection, Vector3.down) > 0.5f)
{
_heldFaceDirection = GetClosestFacePosition(currentHeldObject.transform.position);
}
Vector3 targetPoint = this.transform.position + new Vector3(0, _holdYOffset, 0) + (_holdDirection * _holdDistance);
Vector3 force = targetPoint - currentHeldObject.transform.position;
//if (force.magnitude > 1) force.Normalize();
force *= _holdForce;
currentHeldObject.GetComponent <Rigidbody>().AddForce(force);
Debug.DrawLine(this.transform.position, targetPoint, Color.red);
}
}
public void PickUpObject(FoodObject food)
{
if (currentHeldObject != null)
{
if (currentHeldObject == food)
{
return; // already holding this food
}
else
{
DropObject(); // drop whatever was being held before
}
}
currentHeldObject = food;
_prevObjectDrag = food.GetComponent <Rigidbody>().drag;
food.GetComponent <Rigidbody>().drag = 10f; // stop it from osciliating when being picked up
_heldFaceDirection = GetClosestFacePosition(food.transform.position);
_holdDistance = 0.3f;
StartCoroutine(PickUpObjectCoroutine());
}