I have Valuable objects stored in a SparseGrid2D object. These objects' doubleValue() members return values in [0,1]. I would like to use a ColorMap similarly as one would with a FastObjectGridPortrayal2D to render these SparseGrid2D objects accordingly. After RTFM'ing I don't see a nice, clean way to do this. The best I can do is to implement a draw() function, which seems like overkill. Surely there is a quick an easy way to do this in MASON?