Shaking issue

cleerssen

Hey all,
first post here, hopefully its a softball for you all. I'm collaborating with others in the office on this master planning model. The workflow is thus: CAD drafting of terrain and building footprints, import into Sketchup, then elevate architecture and refine refine refine. The problem is (and i've never really seen it before) a major shaking going on when we view the model, especially up close. Like the darn thing is in a major earthquake. Is this some sort of scale thing or what? Help please. It does this on multiple computers/video cards. thanks,
christopher

brodie

Can you post the model? I'm not sure what you mean by shaking I guess in terms of a SU model.

-Brodie

thomthom

I've seen that sometimes when models has been built up from AutoCAD drawings. Don't know what causes it, but I know how ot fix it. Rebuild the groups or components. Explode them then regroup. Not ideal, and some times allot of work.

cleerssen

here's one of the files that "shakes" as you move throught it. Worse when you rotate or pan around it.block-14_10x.skp

remus

It looks like the problem is that you have loads of overlapping geometry, i.e. lots of geometry sharing the same space.

You should probably be able to fix it by going in to each group/component, selecting everything->right click->intersect->with selected->then delete all the bits that intersect.

There might be a faster way of doing it, but the method described above should work as a last resort.

brodie

@cleerssen said:

here's one of the files that "shakes" as you move throught it. Worse when you rotate or pan around it.[attachment=0:1cfcv5ax]block-14_10x.skp[/attachment:1cfcv5ax]

Yeah, that's a tricky problem. Remus is right. When you pan around the shaking is the computer trying to figure out which of the faces to show. Exploding the whole thing solves 95% of the problem leaving just a few areas where there are 2 surfaces on the exact same plane.

But I'm guessing you have the geometry grouped for a reason (?). If so then I think you may want to at least try grouping differently. For example, explode the roof and group it all together as one entity instead of 2 seperate groups.

No matter what I think you're stuck w/ doing some TNT style exploding, unless anyone else knows a fix.

-Brodie

Anssi

Cleerssen,

At least some of the clipping, flickering etc. in the model is caused by the model being so big and far from the origin. The model seems to be scaled, perhaps by a factor of ten. The scale is in meters, and the model is more than two kilometers across, and the building has stories that are 33 or 34 METERS in height. You should scale the model down to the intended size, and move it nearer to the origin, unless you are designing a house for Gulliver...

What I guess is that the CAD files you were importing were made using Millimeters as the drawing unit, and you used Centimeters as the import unit in SU (Options button in the Import File dialog box)

Anssi

cleerssen

thanks folks, remus and brodie were right: a good bit of it was the groupings and the overlapping surfaces. I knew that a plane on top of a plane would create issues but it really made it look like it was shaking, not the flickering that i've seen in the past. Maybe because it was so widespread. Exploding it took care of a lot of it. We'll be more selective and sparing with the groupings. Thanks again, we appreciate your troubleshooting time.

young

~i have the same problems.