Make source
There are several helpful sources that we could use in VTK-m such as wavelet, tangle, superquadratic, etc. We should implement at least some of them, but first we need a mechanism to implement them. We only have Filter
superclasses, but having a source with no input does not fit in this category. It is awkward to call Execute
because it takes an input DataSet
that does not exist for a source.