compute_value
Description:
Compute the value for a managed property at a given progress.
Note: 
      
        
    
    Use KeyframeTransition instead
If the property is an ease-in property, the current value of the property on the object will be used as the starting point for computation.
Parameters:
| this | a Animator | 
| object | a Object | 
| property_name | the name of the property on object to check | 
| progress | a value between 0.0 and 1.0 | 
| value | an initialized value to store the computed result | 
Returns:
| 
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