Re: creating a wireframe 3d display

• To: Vijay Chemburkar <vijay@xxxxxxxxx>
• Subject: Re: creating a wireframe 3d display
• From: Curtis Rueden <curtis@xxxxxxxxxxxxx>
• Date: Thu, 05 Jul 2001 09:21:21 -0500

Hi Vijay,

>I'm fairly new to visad, and I'm wondering how I can create a wireframe 3d 
>display using VisAD. I have several sets of points (stored as doubles or 
>floats) in 3 dimensions, where each set should be connected to form lines, and 
>then some sets can be connected to form planes. How can I get VisAD to store 
>these points and connect only the points I want to have connected?  I have a 
>few ideas on how to do it, but none of them seem good(i.e., there must be an 
>easier way). Any suggestions that you have would be greatly appreciated. 

The best way to do what you want is to use a UnionSet of GriddedSets.
Take a look at the main method of visad.Delaunay, particularly lines
1013 to 1060.  You can take a look at this code in action by running:

    java visad.Delaunay 3 30 2

The basic idea is to build each component of your data (each line)
as a Gridded3DSet with manifold dimension 1, then merge all the data
into a single object (a UnionSet).  You could also include planes
using Gridded3DSets with manifold dimension 2.

Let the list know if you have any questions about this.

-Curtis

• References:
  • creating a wireframe 3d display
    • From: Vijay Chemburkar