On Jan 21, 2011, at 5:18 PM, Jay Carlton wrote: > Hi, > > Is there any way in MGED to hide dashed wireframes of deleted surfaces? For > instance, if I have a solid disc and delete a cylinder through it to make a > washer, and if the deleted cylinder is taller than the disc, I see the > surface of the deletion in the wireframe view. This situation comes up often, > and the ghost wireframes tend to clutter up the view.
Understandable. It's one of many usability details that one tends to forget about over time. You get used to seeing through the clutter. (All I see now is blonde, brunette, redhead...) Alas, there's not a way to just turn off the negative wireframes. That said, there are a couple things you can do. The 'ev' and 'E' commands can be used (for relatively small geometries) in place of the 'draw' (aka 'e') command. Those commands will draw evaluated surfaces. Running "ev -T" can be particularly clean for some geometry. The NURBS/BREP work is actually the long-term solution being worked on to address the problem, but it'll still be a while before that is ready. With CSG-evaluated NURBS, we get clean simple wireframes fast that have perfectly clean lines. It coincidentally will also provide shaded displays too. It's one of *many* reasons why we've spent so much time and effort working on proper NURBS support. > One alternative is to minimize the volume of the deletion, but then I'd have > to update its dimensions every time the surviving solid changes. My > preference would be to have a through hold be "infinitely deep", so that it's > still a through hole if the part gets thicker. Minimizing the volume of deletion will also improve ray-trace performance. Depending on your geometry, the savings can be roughly correlated with the percentage of volume reduced. The preference you suggest of having a hold be "infinite" is something on the to-do list for next year. Namely parametric object support so you can describe geometry relative to other geometry. That's the foundation for modern "feature editing" where you describe holes, fillets, chamfers, slots, etc. Cheers! Sean ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ BRL-CAD Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/brlcad-users
