AutoCAD to SketchUp Issue

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AutoCAD to SketchUp Issue

Postby AllStarMe » Sun Dec 13, 2009 7:18 pm

Hey guys,

I've been searching everywhere for the answer to the issue I'm having, and I can't seem to find it. I wasn't really sure what to call the problem I'm having, which made it a little harder to research.

Basically, I've got a ground plane that I sandboxed, and now I'm trying to drape some property lines I've brought in from autocad. I then need to color the different areas different colors.

The problem I'm having is that after I drape the linework, sketchup doesn't break up all the sections, so I end up with large areas that 'jump' over the property lines making it impossible to select just one area. Anyone know how to fix this??? Thanks!

I couldn't upload the file because it was too large of a file, so if you want to see the skp file, e-mail me and I'll send it to you.

Jake
jln.jake@gmail.com
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Re: AutoCAD to SketchUp Issue

Postby juan974 » Sun Dec 13, 2009 8:07 pm

Hello,
sometimes i just redraw one of the line and it cut my planes ... but it doesn t works many time
the harder way is to make a component whit your curved plane and the lines, extrude all the lines along blue axis (whit a plugin named extrudelinestool.rb), copy the extruded line, close the component, paste in place, move them along blue axis to be sure they all cross the curved plane, edit the component, select the curved plane and in right click context menu choose intersect whit model, sometimes it works ...
hope it helps
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Re: AutoCAD to SketchUp Issue

Postby tomsdesk » Sun Dec 13, 2009 9:27 pm

Purist won't like this reply, but...this happen so often to me (especially where the segments of a curve get near a plane break edge and you'll hit the clipping problem before you can get close enough to redraw) that I always use the old method (basically the drape steps manually):

Hover your road dwg over the site the same as for the drape command...instead use the "extrude edges" ruby to pull vertical faces down thru your site. Now select all and "intersect with model"...do this several times. Then crossing select the vertical faces above or below the site plane (either or not both)...if none of the faces are selected on the other side of the site plane then you are 100% successful (and pretty lucky :`) and can erase all the vertical faces assured your site is cut completely. If you're not 100% you can now easier see where the site is not correctly cut.

Oh yeah, having hidden geometry visible seems to help...or maybe it's just my karma?
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Re: AutoCAD to SketchUp Issue

Postby TIG » Mon Dec 14, 2009 10:43 am

Use a Style that marks end-points and has heavy lines for Profiles.
Work with Hidden Geometry ON.
This lets you see which lines aren't splitting a Face as they'll be heavier.
Zoom in to their ends - they might not meet the nearby Edge...
Moving a Vertex [Line end] to snap to another or drawing a piece of new Line in can cause the Face to split...
If they seem to split but the Face is still spread across Edges then try Selecting all of the affected area and use Intersect with Selection.
It can be caused by imported Arcs being Segmented and then not touching Lines that did meet them in the CAD drawing.
It can also be caused by just sloppy CAD drawing where lines don't quite touch each other...
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Re: AutoCAD to SketchUp Issue

Postby DavidBoulder » Mon Dec 14, 2009 10:17 pm

Often I think the problem is due to auto cad files where things that appear to join or intersect, do not. There are some 3rd party AutoCad tools to clean up the drawing. I've also brought them into Illustrator prior to SketchUp and used their gap detection tools. You set a tolerance and it fills any gaps smaller than that size.
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Re: AutoCAD to SketchUp Issue

Postby Gaieus » Tue Dec 15, 2009 11:04 am

If that is the problem (which may well happen), Todd Burch has a plugin "CloseOpens" ($20) at Smustard.
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Re: AutoCAD to SketchUp Issue

Postby Starlex » Wed Dec 23, 2009 1:01 pm

Hi

I'm trying to import dwg/dxf ground plan 2 sketchup to build 3D view

So, after importing I'm see divided lines.

Are there any chances to solve this, and get whole lines objects instead of divided?
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Re: AutoCAD to SketchUp Issue

Postby TIG » Wed Dec 23, 2009 3:12 pm

When you import a CAD arc into SUp it always has 20 segments.
If that arc doesn't form faces etc you can usually select it in SUp and get Entity Info and increase the segmented-ness i that dialog.
All SUp arcs are segmented - even if you give an arc 1000 sides it will still look steppy if you zoom in enough.
It's a 'limitation' of the software - there are no true SUp arcs, circles or curves - just connected edges ['segments'] that approximate to them...
Other types of 'Curve' [non-Arc/Circle] will have segments counts that cannot be adjusted unless you use something like BZ Tools and redraw over them - use grouping to keep geometry 'unstuck' and erase the unwanted stuff after redrawing.
Choose mid-range segmentation for arcs that need to be finer - say 36 or 72 ? But often 8 or 12 will do - e.g. for a handrail tube that's never seen in closeup.
If you are looking to 'extrude' these CAD arcs as walls etc they'll look fine with their facet joins smoothed [use Erase+Ctrl and rub over lines to 'smooth' them]...
You will still need to 'heal' some gaps between line ends that touched the CAD arc but taht now miss the SUp arc, sorry...
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Re: AutoCAD to SketchUp Issue

Postby Starlex » Wed Dec 23, 2009 5:48 pm

thx)

are there any suggestions to get whole objects? Grouping them manually spends too much time...
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Re: AutoCAD to SketchUp Issue

Postby TIG » Wed Dec 23, 2009 6:52 pm

Starlex wrote:thx)
are there any suggestions to get whole objects? Grouping them manually spends too much time...

What do you mean 'whole objects' and 'grouping' ?
What do you wan tot do with these edges ?
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