barrel- vaulted roof tool confusion

[Anonymous]

Is there anyone who can better explain the barrel-vaulted roof tool better that the reference guide. it is so confusing i am totally lost. i have been reading the manual for a while and i justget more confused as i go so i thought i might ask ya'll. thanx

[Dwight]

Change the magic wand to control the rotate/revolve/profile segments - in this case, an octagon.

[Dwight]

and here's the final product.

[Anonymous]

Dwight,
I'm curios about something you did with the setup for using Profiler.
Why did you make the axis line slightly off of vertical rather than
exactly vertical ?
Also, why did you make the dome a solid shape rather than
a shell with some thickness so in section the dome would
have an interior volume of empty space ?
I hope you don't mind me asking.
Peter Devlin

[Dwight]

Peter wrote:
Dwight,
I'm curios about something you did with the setup for using Profiler.
Why did you make the axis line slightly off of vertical rather than exactly vertical ?

Peter Devlin

That is an old guy's trick. What you are seeing is a slight (as small as a millimetre) lateral offset for the axis of rotation line - still perfectly vertical - because ArchiCAD can't spin on itself. It is just my practice to do so... it could be obsolete.

Peter wrote:
Also, why did you make the dome a solid shape rather than
a shell with some thickness so in section the dome would
have an interior volume of empty space ?
I hope you don't mind me asking.
Peter Devlin

I am working on the drill press and in the paint shop today so I needed an escape - just did it to show the principle of doing a segmented or faceted shape. Who needs reality? Here in Vancouver, judging by the leaky condos and mildew failures, the architects like to build from full-size foamboard and plasticene.

[Dwight]

Just checked it - you don't need the offset any more. Duh.

[Anonymous]

Dwight,
Thank you for posting back.
This "old guys" trick reminds me of something that used
to happen with Profiler if you drew a profile that had it's
starting point on the axis and it's last point on the axis.
You would get some error message and Profiler would not work.
This would force you to either tilt the axis slightly or stop
the profile slightly short of the axis line.
Is this the origin of the "old guys trick ?
Peter Devlin

[Dwight]

The other old guy trick is that they think things stay the same when they change.

[Anonymous]

you can't unteach (is that a word...) an old dog.. erm.. old tricks?

[Dwight]

Except through the public humiliation of having him post a wrong answer, with illustrations, even.

Sort of like that dog that fetched the grenade.

[Anonymous]

Dwight wrote:
Sort of like that dog that fetched the grenade.

poor pooch... BTW Dwight, go to bed... I know for damn sure that's what I'm about to do.. ahh lovely working on a project , until 1am, that your BOSS neglected to do, and then pawned off on you the day before your client wants a drawing... isn't it ?!?!