how to pass an array of generic in Modelsim

Is the array always 2 elements? Could you not just have 2 separate real generics? you can force these from the command line.

Otherwise, I know its possible to use TCL to modify constants in a package. You could set up a TCL script to modify the constant then start modelsim simulation and batch up your tests this way.

Unfortunately, I dont have the knowhow on this, but I've seen it done before.