new DistMapEntry(xPos, yPos, value)
    One entry of a Distancemap
    Parameters:
| Name | Type | Description | 
|---|---|---|
xPos | 
            
            number | x coordinate | 
yPos | 
            
            number | y coordinate | 
value | 
            
            number | 1 (occupied) or 0 (free) | 
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