CGAL users discussion list

[JuanLu <>]

Hi Zohar,

Geomview use a file format named OOGL. You can see the OOGL format
description here:

http://www.geomview.org/docs/html/OOGL-File-Formats.html#OOGL-File-Formats

If you click on "Object File Formats" hyperlink, you'll be able to see
several object formats (OFF and LIST among them). Your file contains a LIST
(click on "LIST" hyperlink). LIST defines a list of OOGL objects (is a
recursive definition). The difference between an off and oogl is off only
defines the geometry while oogl format defines the geometry and how to draw
this geometry on screen.

off format is an subset of oogl (click on return up and then click on OFF
hyperlink). Here you'll be able to see the .off file format. There is only
one off format. There isn't extended off format.

You would need a viewer that supports oogl. None of the viewers you have
seen support oogl format. The only viewer that supports this format is
geomviewer and the most people in this forum know this application was
discontinued. I have read that Geomview project ran out funds.

Your OOGL file shows an object that have to be drawn with a pen. The pen
must have one pixel of thickness, and should be transparent (+ activate
attribute, - deactivate attribute). You can see this detail from the first
link I have posted...

... click on Non-geometric objects -> appearance -> Appearances

Here, you can see the definition how the object must be drawn on screen (all
the appearance parameters). Anyway, I believe that you don't take care these
details.

The solution I believe it could work fine is to visualize each of off
objects in your file in a separate way. Open your file with a text editor
and search for the OFF words and count the number of occurrences. If there
are a few OFF objects, copy each of the OFF sections on clipboard and paste
them into new files (removing the braces) with .off extensions.

Then, open the .off files you have created with the viewer you have tried
earlier. Now it should be able to see the geometries.

If there are many OFF occurrences within your file, I'm sorry but I cannot
give you any solution.

Regards,
Juan Luis.



--
View this message in context: 
http://cgal-discuss.949826.n4.nabble.com/Geomview-replacement-tp4655575p4655617.html
Sent from the cgal-discuss mailing list archive at Nabble.com.