Brett Chladny (chladny++at++atlanta.sgi.com)
Wed, 20 Jan 1999 19:37:41 -0500
"More costly" is a relative term. More cost to what sub-system? If you
are trying to find the least cost for the graphics sub-system and they
keep going in and out of the view, I would put the pfDCS's below
pfSwitch nodes. Otherwise, if they leave for good, removing them is a
good idea. Also, if you convert all the pfdNewCircles nodes into
instances of the same display list, you may see a small performance
improvement.
Brett
Kevin Curry wrote:
>
> Hello Performers:
>
> I am working with the following scenario and I have a question which
> follows:
>
> I'm using pfdNewCircles with 16 triangles (GeoSets) to represent blips
> on a radar. The radar has some range, X, whereby objects that are
> further away than X do not appear on the radar. The GeoSets are
> attached to Geodes, which are attached to DCSes.
>
> Which of the following is more costly to implement when items move out
> of range and should disappear from the radar:
> 1. Draw the pfdNewCircles all the time and just move their DCSs'
> translation matrices to some whacked out location like (-10000,
> -10000, -10000)?
> 2. Draw the pfdNewCircles all the time and make their GeoSets'
> GeoStates transparent?
> 3. Call pfDCS->removeChild and remove the blipDCSes from the radar
> (also a DCS);
>
> Thanks! - Kevin
>
> --
> Kevin M. Curry - http://csgrad.cs.vt.edu/~kcurry
> M.S. Candidate, Computer Science
> Graduate Research Asst. VT-CAVE,
> University Visualization & Animation Group
>
>
This archive was generated by hypermail 2.0b2 on Wed Jan 20 1999 - 13:41:54 PST