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jPCT - a 3d engine for Java => Projects => Topic started by: Jonas on January 01, 2008, 01:03:16 pm

Title: 3DCov(Java3d->jpct port)
Post by: Jonas on January 01, 2008, 01:03:16 pm: Hi
As part of a term project, a friend and I been working on porting a little visualisation tool from Java3d over to jpct(pure software mode) the last ~2-3 weeks.
This was done because people kept having troubles running it under Java3d. The new version runs suprisingly smooth(given
a few things are probably implemented quite inefficient ;D due to lack of time) even on low end computers.

The tool's named 3DCov and is used to visualize the relation between classes and objects(for OO beginners). Following a few screens of a loaded diagram:

(http://web72.pi.ibone.ch/3dcov12.PNG)

2d/3d view. 2d is done using JGraph (http://web72.pi.ibone.ch/3dcov1.PNG)
Some classes/objects moved around (http://web72.pi.ibone.ch/3dcov8.PNG)
Popup menu (http://web72.pi.ibone.ch/3dCov6.PNG)
Labels(multiplicity, roles, ...) (http://web72.pi.ibone.ch/3dcov13.PNG)

Happy new year everyone :)
Title: Re: 3DCov(Java3d->jpct port)
Post by: EgonOlsen on January 01, 2008, 04:34:36 pm: Looks nice! Judging from the fps count, i assume that you render the scene in a loop and as fast as possible? If so, then maybe changing that to event based will help to reduce cpu load plus you can render an anti-aliased version of it in case that no further events occur during a given time frame.
Title: Re: 3DCov(Java3d->jpct port)
Post by: Jonas on January 01, 2008, 04:48:44 pm: Loop yes, as fast as possible no(that be a lot higher fps). The target fps is set to 20.

Changing to an event based rendering is something I wanted to do, but implementing all functionality was
more important and took up all our time(which wasn't that much to begin with anyway :D).
Title: Re: 3DCov(Java3d->jpct port)
Post by: EgonOlsen on January 01, 2008, 08:23:29 pm: Quote from: Jonas on January 01, 2008, 04:48:44 pm
Loop yes, as fast as possible no(that be a lot higher fps). The target fps is set to 20.
Sounds reasonable. Then an event driven approach may not give you that much anymore. Has this project a homepage? Something i can link to from the projects section?
Title: Re: 3DCov(Java3d->jpct port)
Post by: Jonas on January 01, 2008, 09:03:43 pm: We don't have a homepage, and I doub't that anything is planned. I will ask after holidays are over though.

edit: Just tried oversampling...works nicely and really looks good. Rendering is smooth. However, it kinda breaks picking(do i have to scale the x/y position im using at reprojection or something?)..didn't investigate it any further.

edit2: Yep, didn't scale. Seems to work great now. ;D
Title: Re: 3DCov(Java3d->jpct port)
Post by: JavaMan on January 06, 2008, 11:09:37 pm: Looks cool. Good way for beginners(like me) to visualize the relationships.