How to make complex profiles cleanup up at corners?

[rob2218]

[Barry Kelly]

Your poor builder is going to have exactly the same problem out on site.
You are trying to mitre 2 angles at the same time witch would be very difficult to work out the exact mitre angle.
You need a 45° vertical cut for the corner but a non vertical mitre for the roof slope.

Really you need to mitre around the corner first with a horizontal profile and then mitre that to the profile running up the roof slope.

There is a good post here somewhere explaining it - I will try to find it.

Barry.

[Barry Kelly]

It seems you had the same problem some years ago.

http://archicad-talk.graphisoft.com/viewtopic.php?p=163893

In there I found a link to this post - which I think is the one I was thinking of - but there may be another I can't find.
The last post on the first page illustrates the problem pretty well.

http://archicad-talk.graphisoft.com/viewtopic.php?t=9370

After a while it seems to just get into a discussion about Objective which may be another solution if you have it.

Barry.

[rob2218]

I have the lines in place and the angle of the roof but not sure how to connect what line to what?
They talk about a roof rake being at 45 degrees and they used lines being projected at 45 degrees but mine is a 3:12 slope of which I projected the lines accordingly.

Not sure I understand just how to get that correct shape to make the raked profile.

[Barry Kelly]

What I would do is this.

Place the profile along the front and wrap around the end (horizontally) - both profiles in the same layer so they trim automatically.

Place the raking beam on the side in a different layer with a different layer intersection priority number so it won't trim automatically.

In an elevation from the end determine the intersection angle or the roof and horizontal profiles.

Place a zero thickness roof at this angle from the top back edge of your profile.

SEO the horizontal profile to this roof with downward extrusion and SEO the sloping profile to this roof with upward extrusion.

Barry.

[Barry Kelly]

And the end result (after hiding the layer for the SEO roof).

Barry.

[rob2218]

So now I've had to resort to a "hideous morph" object to cleanup at the corner.
GEEEEZZZ.....I wish I could make this thing work.
If only the two profiles would cleanup as they need to. Then I would have to use that morph object and have those extra diagonal lines in elevation.

[Barry Kelly]

You can edit the edges of the morph to make them hidden - make sure you use the sub-element selection to get just the lines you want.

There was no morph at all in the method I showed.
Exactly the same profile used as a beam.

The hardest part was placing the roof at the correct angle for the SEOs.

Barry.

[rob2218]

Yes, I know there was no "morph" on the solution you gave Barry.
I just couldn't get that to work as you did.
So...i concocted a "morph" object, then did as you said, hide the lines I didn't want to see.
it's "ok" for now.
But bloody hell!....sure is a pain to get this like i want it.

[Richard Morrison]

Rob,
You seem quite upset that ArchiCAD can't easily draw something that defies basic geometry, and is technically unbuildable as you're trying to do it. You have several options:

1) Give the roof a square-cut end, rather than a plumb cut. This will let you wrap the profile exactly.

2) Use a slightly stretched profile for the vertical crown molding height, which will match the sloped crown's plumb height. Not perfect, but about the best you can do with a vertical fascia.

3) Move to a non-Cartesian universe.