line cleanup?

[Anonymous]

I hope I am hitting the right forum with this question...I have found that simple wall/ roof intersections clean up pretty nicely in section, but if things get even slightly more complicated, I get seams which I don't want to see. I don't know of a clever way to get rid of these lines, without exploding the imported drawing in plotmaker, which I am somewhat reluctant to do...I'd rather draw over the lines I don't want while in AC, just in 2D, but don't have a good workaround for hiding/ masking/ omitting lines that I don't want to see. Suggestions?

[Anonymous]

If you set the view condition in the section dialog to "Drawing" as opposed to "Autorebuild" the drawing can be updated manually - but you can do drafting cleanup on the extraneous stuff. It is better if the modeling conditions are correct first as the number and condition of odd lines will be reduced or eliminated. Joining issues between elements can be sometimes refined by using the SEO's or other trimming options as well as using the joining of roof surfaces with the roof tool.

Many times I ihave left the cleanup to the end of the job as I try to leave the sections and elevations "live" as long as possible - and forever when I can get the model correct

Lew Bishop
AC9US
PB1.5 - OS10.4

[Djordje]

From this section, it looks like all your issues are the modeling ones.

Especially the roof joining each other, and walls and slabs.

Attached is a PDF with my comments.

[Anonymous]

Yes. Lew, thank you for this tip, and the gen advice of getting the model as right as possible initially...and Djordje, thank you for taking the time to look over my drawing.
My experience in trimming slabs to roofs was that the slabs (here used as ceilings) would trim with a vertical edge, rather than seamlessly blending in to the roof. I don't know if this is a switch somewhere...or what.
I don't yet have much experience dealing with SEOs, but do the elements retain their identity/ editiablilty, or do they smonch into one new thing?
Also, I don't know at ALL how to seamlessly join the two roofs i my drawing...is that another trimming function? Or an SEO? I feel like an 8-year-old with my thumbs taped to my palms, using this, sometimes...but I'm getting there...
many thanks

[Anonymous]

Zobi

To join two roofs seemlessly follow this:

Stretch the two joining edges apart slightly (this will make results more obvious),
Select one roof,
Ctrl-click the other roof's edge to match into it, which will extend it to the intersection point.
Repeat with the other roof selected.

This ensures edges meet at the correct point with the correct edge plane also.

HTH

[Anonymous]

Zobi wrote:
...Also, I don't know at ALL how to seamlessly join the two roofs i my drawing...is that another trimming function? Or an SEO? I feel like an 8-year-old with my thumbs taped to my palms, using this, sometimes...but I'm getting there...
many thanks

Zobi,
read through the following thread for techniques to join roofs
http://archicad-talk.graphisoft.com/viewtopic.php?p=31744&highlight=ctrl+click+roof#31744

HTH,
Dan K

[Anonymous]

Ok, getting somewhere. Thanks to all.
HOWEVER, my ceiling, which was a slab, was not trimming out to my roof at all, rather, I got a vertical cut at the point where the top plane of the ceiling thickness met the bottom plane of the roof thickness, which was lame. My clever workaround, which has so far failed miserably, was to use a roof with a pitch of 0, and trim it to the other roof with the cmd-click operation, which works beautifully in other circumstances. What happened, though, was that the top plane of the ceiling met the top plane of the roof, and and the angle through the thickness of the roof was 1/2 the difference...my solution to that was to, in section, place the intersection on the inside of the roof plane, and change the angle at the edge of the roof slab so that it would meet up...I gotta post a picture, I am murdering this description...what I ended up with was a line where I wanted none. That's the upshot. Should I use a really really short, fat wall as a ceiling? These cleanups are killing me. Your thoughts?

[Djordje]

s2art wrote:
Stretch the two joining edges apart slightly (this will make results more obvious),
Select one roof,
Ctrl-click the other roof's edge to match into it, which will extend it to the intersection point.
Repeat with the other roof selected.

This ensures edges meet at the correct point with the correct edge plane also.

Correct.

Make SURE that you do this in the 3D window, so that you also see what is happening.

[Aussie John]

Using a roof to form a ceiling has a number of benefits but unfortunately has one HUGE downside. Unless you have vertical edges to a ceiling the 2d line you see in your Reflected ceiling plan is in the INCORRECT PLACE. This is due to the line actually representing the TOP of the roof. Obviously this is not correct for a ceiling. I wish GS would address this and this formallised in a wish
http://archicad-talk.graphisoft.com/viewtopic.php?p=33241&highlight=roof#33241
Why I was the only person to vote essential mystified me as there really is no other easily used tool with which you can insert sloping ceilings.

Anyway this brings me back to your problem. As a stab in the dark you may be lining up the 2d line of the ceiling with the roof plane but which in fact is not the 3d position.

[Anonymous]

I feel like I've maxxed out my understanding here.
I have two images, which I believe I have to send as two posts.
So here's the first:
This is a slab I am attempting to intersect with the roof.
the Left side I used the "trim to roof" command. Not what I want.
the Right side I SEOd by copying up the roof slab and using it to trim off the end of the ceiling. A bit of a chore, felt clumsy, and also not the result I want.
So...I'll do the next one...