Re: Displaying 2D Grid as a mesh

• To: Tolga Sakman <tsakman@xxxxxxxxxxx>
• Subject: Re: Displaying 2D Grid as a mesh
• From: "From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>
• Date: Fri, 8 Jun 2001 20:43:14 -0500 (CDT)

Hi Tolga,

If your Gridded2DSet is depicted as one long line, I suspect
you have used the constructor for a Gridded2DSet with manifold
dimension = 1 (i.e., you only supplied lengthX, whereas you
need to supply lengthX and lengthY for manifold dimension = 2).

However, VisAD will depict this as a filled solid, rather than
as grid edge lines. To make grid edge lines, you need to compute
them from the grid and draw them in a UnionSet of Gridded2DSets
with manifold dimension = 1. You can see an example for
IrregularSets in the main() method of visad/Delaunay.java.

Cheers,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI  53706
hibbard@xxxxxxxxxxxxxxxxx  608-263-4427  fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html


On Fri, 8 Jun 2001, Tolga Sakman wrote:

> Hello all.
> 
> I am trying to display a 2D grid, using a Gridded2DSet. While I am setting 
> attributes for GraphicsModeControl, if I setPointMode(true), then I see my 
> data field as:
> http://www.acricfd.com/images/VisADList/points.jpg
> 
> whereas I want to see my grid as:
> http://www.acricfd.com/images/VisADList/grid.jpg
> by definition of grid.
> 
> If I setPointMode(false) then all I see is a continous line going in x 
> direction w/out interrupting (there's also a line from [1,n] to [2,1] and so 
> on) and there are no grid lines in y direction.
> 
> Is there a way to display this grid as shown in the secong figure, or should 
> I write my own method to connect every [i,j] to its neighbors in x and y 
> directions?
> 
> Any help will be much appreciated.
> 
> Tolga
> 
> < < <  t o l g a : | | : s a k m a n  > > >
> engineer, cfd consultant
> analytic & computational research, inc -- acri
> los angeles, ca
> 310-471-3023
> tolga.sakman@xxxxxxxxxxx || www.acricfd.com
> 

• References:
  • Displaying 2D Grid as a mesh
    • From: Tolga Sakman