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Forums >> Revit Building >> Technical Support >> curvy sketch extrusion
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Joined: Sun, Apr 23, 2006
265 Posts
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see here what i'm trying to do.. i did this extrusion
with spline lines.. but i don't want it to be irregular
like that.. how do i make accurate curves?
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Joined: Thu, May 28, 2009
829 Posts
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I would suggest using arcs, still. Arcs will snap to suggest smooth transitions to the next segment.
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Joined: Sun, Apr 23, 2006
265 Posts
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huh?
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Joined: Tue, Mar 15, 2011
199 Posts
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when you go to draw your shape, there is the little box which has the pick lines, box, etc. It also has the arc from center, arc from 3 points, etc. Use either of these to get the shape you desire, splines, as you've noticed, don't allow any true accuracy.
GL
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Trent Best
Best Systems
the.tabest@gmail.com |
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use start-end-radius arcs. They will consider the radius of the previous line legment in your path, and snap to suggest a smooth transition.
attached are two pictures, of the snapping of the arc in action, and a sample flashy sweep which I find hard to resist doing.
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Joined: Sun, Apr 23, 2006
265 Posts
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try again..
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I went out of my way trying to help you. sorry, I won't try again. I'm guessing the "gurus" learned this lesson long ago, and that's why there are no other responses.
The "kink" you are seeing is where one portion of the sweep overlaps another. They're not on the same plane. The sweep is three tubes, and it's an isometric view.
Edited on: Fri, May 6, 2011 at 1:14:01 AM
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Joined: Sun, Apr 23, 2006
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of course i appreciate you trying to solve my problem..
my original problem explanation was this:
"i don't want it to be irregular
like that.. how do i make accurate curves?"
you showed my one long curve made with
pieced together arcs.. that leaves kinks and
bends in the thing..
but hang in there- you're doing great.. you
and me partners..
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Joined: Sun, Apr 23, 2006
265 Posts
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alterego-
the words "try again" was me trying to upload the
image for the third time.. in that image i was pointing
out the "kinks" or bends in the continuous curve- like
what i posted originally with an image showing that
problem..
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Joined: Tue, Mar 15, 2011
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how about this? I'm assuming you can make the shape in CAD, right? So make a CAD drawing of the shape as you want it, then import it into family, then use the pick lines to draw on top of it (tab click to get most of them at once)... Then delete the CAD import, and because I'm this way, copy linework to another family so that it doesn't have any of the CAD stuff hanging around... Extrude the shape, and hopefully you get what you want...
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Trent Best
Best Systems
the.tabest@gmail.com |
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Joined: Tue, May 16, 2006
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Read a geometry book - pay attention to tangential curves. What alterego showed was correct and all tangential curves.
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Joined: Thu, May 28, 2009
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Sorry for misinterpreting you. I was in a bad mood.
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Joined: Sun, Apr 23, 2006
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Hub- how is it correct if you can see the connection breaks in the
curve and i want a smooth consistant variable radius curve? and
what "geometry" book would you recommend?
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Joined: Sun, Apr 23, 2006
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alterego- no worries mate- thanks..
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Joined: Sun, Apr 23, 2006
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thetabest- thanks for trying to help..
i never did CAD or hand drafting- i'm with the new
BIM generation..
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