In the whitepapers for 2.0 there is an exsample hov to interpolate between points, the exsample uses GridLayer, with takes an file in the constructor.
In 3.0 the GridLayer also takes an file. Is it realy right that the only why to define an Grid is using an psysical file, i will prefer to have my grid in memory.
The intended use is an layer with with points, and then define a grid with interpolated values, and then draw them on the graph, all data is stored in an MySQL server.