go to www.geomview.org home page
 
Home

Overview
FAQ
Documentation

Download

Mailing List

Geomview For Windows?

Support
Users
Development

Bug Reporting
Contributing
Contact Us

Sponsors

 

Site Search

 

Advanced
Search

 
About the software@geom archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Update REQ 5912]: occlusion points


  • To: software@geom.umn.edu
  • Subject: Re: [Update REQ 5912]: occlusion points
  • From: daemon
  • Date: Sat, 20 Jul 1996 22:54:04 -0500 (CDT)

> Is there a way to read off the visible points of an object for
> different views?

Not directly; geomview uses Z-buffering, which lets the graphics system
decide for each pixel whether it's closer than any other graphical item,
and doesn't explicitly record which vertices are visible.

However, you could use geomview's "pick" facility.  You'd interactively
click on the points you can see, and geomview can provide their coordinates.
This might be tolerable if you don't have too many of them.
You'd feed geomview a command like:
	(interest (pick world))   or   (interest (pick primitive))
(where the keyword following "pick" indicates the coordinate system in which
you'd like the data to be returned).  Geomview would emit pick results
whenever you clicked the rightmost mouse button.  There are examples of
interpreting this in the manual.  If you say more about the context you'd
like to use this in, I could explain further.


 
Home | Overview | FAQ | Documentation | Support | Download | Mailing List
Windows? | Development | Bug Reporting | Contributing | Contact Us | Sponsors
 
site hosted by
SourceForge Logo