/// <summary>
/// Update the dictionary that keeps rigidbodies and their picking information. This should
/// be called whenever a pickable object is picked up or released.
/// </summary>
/// <param name="pickableRb">Rigidbody of the pickable object.</param>
/// <param name="isPicked">Whether this rigidbody is picked up.</param>
/// <param name="picker">The picker of the rigidbody.</param>
public static void UpdatePickableMapping(Rigidbody pickableRb, bool isPicked, IPicker picker)
{
if (picker == null)
{
throw new ArgumentNullException("picker");
}
RigidbodyPickingInfo pickingInfo;
if (!_pickableRbToPickingInfoDict.TryGetValue(pickableRb, out pickingInfo))
{
// If the rigidbody is not in the dictionary, create new picking info for this one.
pickingInfo = new RigidbodyPickingInfo();
_pickableRbToPickingInfoDict.Add(pickableRb, pickingInfo);
}
if (isPicked)
{
// The picker picks up this object
pickingInfo.Picker = picker;
pickingInfo.IsPicked = true;
}
else
{
if (picker == pickingInfo.Picker)
{
// Current picker is releasing this pickable object
pickingInfo.IsPicked = false;
pickingInfo.Picker = null;
}
else
{
// This should never happen
}
}
}
/// <summary>
/// Return the picker if the rigidbody is picked up.
/// </summary>
/// <param name="rb">Rigidbody to check.</param>
/// <returns>Picker of the rigidbody if any. Null if the rigidbody
/// is not picked up.</returns>
public static IPicker GetAssociatedPicker(Rigidbody rb)
{
RigidbodyPickingInfo pickerInfo = GetPickingInfo(rb);
if (pickerInfo == null)
{
return(null);
}
else
{
return(pickerInfo.Picker);
}
}
/// <summary>
/// Check if the rigidbody is currently being held by any picker.
/// </summary>
/// <param name="rb">The rigidbody to check.</param>
/// <returns>True if the rigidbody is picked up.</returns>
public static bool CheckIsPicked(Rigidbody rb)
{
RigidbodyPickingInfo pickerInfo = GetPickingInfo(rb);
if (pickerInfo == null)
{
return(false);
}
else
{
return(pickerInfo.IsPicked);
}
}