RE: gridded3dset

• To: "'John Yao'" <johnyao@xxxxxxxxxxxxxxxxx>
• Subject: RE: gridded3dset
• From: "Verrelli, David" <VerrelliD@xxxxxxxxxxxxxxxxxxxxxx>
• Date: Thu, 11 Oct 2001 13:40:52 +1000

John, 

I believe the quoted passage means:

A circle (or any other shape) would be represented by rectangularly oriented
points. 
(I guess this means they don't have to be square, though I would expect
square orientation suits a circle, non-square perhaps for an ellipse.)

Possible representations (in non-proportional font) in two dimensions:

   .....
  .......
  .......
   .....


     ....
   ........
  ..........
  ..........
   ........
     ....


     . . 
   . . . .
 . . . . . .
 . . . . . .
   . . . .
     . .



depending on the desired resolution in each direction.

I didn't understand what you said about a circular base requiring fewer
points.

I am sure others can give a more detailed explanation/correction.

- David


-----Original Message-----
From: John Yao [mailto:johnyao@xxxxxxxxxxxxxxxxx]
Sent: Thursday, 11 October 2001 1:12 PM
To: visad-list@xxxxxxxxxxxxx
Subject: gridded3dset


Hello,
 
Please excuse my ignorance in VisAD.  Suppose I want to generate a shape
with say a circular base, is it still possible to use gridded3DSet with a
manifold dimension of 2?  Since a circular base has less points in a
rectangular grid system than a rectangular base with lengthX * lengthY
number of points, is it pretty much impossible to generate shapes with
non-ractangular base with gridded3dset?  I guess didn't understand the
documentation very well when it stated that 

GriddedSets are N-dimensional sets with rectangular topologies but not
necessarily rectangular geometries.  

Thanks in advance.
 
john

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