czm_isFull
Determines if a time interval is empty.
Parameters:
| Name | Type | Description | 
|---|---|---|
| interval | czm_raySegment | The interval to test. | 
Returns:
	
	
		bool 
		
		 
         
    
    
        true if the time interval is empty; otherwise, false.
Example
bool b0 = czm_isEmpty(czm_emptyRaySegment); // true bool b1 = czm_isEmpty(czm_raySegment(0.0, 1.0)); // false bool b2 = czm_isEmpty(czm_raySegment(1.0, 1.0)); // false, contains 1.0.
