Line Occlusion in Viewports

Hi All,

I'm having a little trouble with the way grasshopper geometry is rendered in the Rhino viewports. In the image below you'll note that lines generated in grasshopper are not occluded by objects in front of them. The normal rhino geometry on the other hand behaves more like what would be expected with surfaces occluding lines. Also if normal rhino geometry is placed in front of grasshopper generated lines the problem persists, basically grasshopper lines are really hard to occlude.

But not impossible! In the image below I can occlude the grasshopper lines if I zoom the camera out far enough. I've also tried playing around with the camera lens length but haven't had much success.

Baking the geometry is unfortunately not an option because I'd like everything to appear neatly for live demonstrations. Does anyone have ideas on how this might be fixed? Perhaps I'm overlooking something?

Replies to This Discussion

Permalink Reply by Mateusz Zwierzycki on January 27, 2011 at 11:33pm

I think the problem is about geometry. As I remember occlusion is only avaible for meshes. Just convert this high cylinder to mesh and then have a try.

Permalink Reply by wolfgang on January 29, 2011 at 1:20pm

My apologies, I think I used some confusing wording. I wasn't taking about the occlusion feature in grasshopper but just how to block grasshopper generated lines with other geometry in the rhino viewports. Is the a known problem or do I have something configured incorrectly?

Permalink Reply by Mateusz Zwierzycki on January 29, 2011 at 1:24pm

no problem, lets say its my fault ;] i have no idea how to change occlusion in rhino viewport, i think its impossible.

Permalink Reply by Chris Tietjen on January 29, 2011 at 4:44pm