> i have a function (x,y) -> (color) and use it as a background for a
> diagramm. now i try to transform this background for a diagramm with
> logarithmic axisis. that means i need a grid with irregular distances. the
> gridded2dset i used had either the wrong length or the wrong dimension or
> was useless in an other way. i have no idea how to go on. please help! (may
> be with same code?)
Gridded2DSets allow arbitrary goemetry (with 2-D checkerboard
topology), so your problems are probably just errors in the
details of how you are constructing your Gridded2DSets.
> an other question is the geometry of the points in visad. do they have to
> be squared or are there other forms. and is it possible to center the
> points on the coordinates? if i try to pick a point near many others
> it could help if the center of the point would be the best place for.
You might be able to fix this by adding a ScalarMap of a
RealType to Shape and setting a VisADQuadArray in the
ShapeControl, properly centered.