Why Can't I Sweep this Profile Around this Curve?
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Here's the Profile & Sweep path:
Here's the result:
Here's the .skp:
Any ideas?
Edit: whoops, images wrong way round, but you get the picture...
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It's too small. Scale it up and try it.
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Scale up and then use FollowMe... then Scale back down - SUp [OpenGL] can't cope with very small facets...
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It doesn't deal with large ones either. I'm doing the same sort of thing, tho my curve is only 20 degrees, not 90, and my radius is much larger -- 250m to as large as 1500m. Every time the followme tool manages to go from the start all the way over to the far side of the arc,both ends are no longer parallel to any ray from the center point of the arc. The points closest to the center point of the arc are always pushed farther along the path than they should and the points furthest from the center point shrink towards each other. It's never very much, but it's also never correct. I always have to extend and trim both ends to get it right.
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Cheers, Jim, TIG.
Seriously, though, how crap. I've been drumming into my students the need to always model things at scale...
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@genma saotome said:
Every time the followme tool manages to go from the start all the way over to the far side of the arc...
genma, have you tried preselecting the curve before using the FollowMe tool? I find that gives more reliable results. But I've also noticed profiles twisting when using FollowMe, especially on long sweeps like spiral stair rails.
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"Twisting profiles" is an an avoidable feature of
FollowMe- it's just the way it does it... BUT the alternative third-party toolFollowMeAndKeep(FAK.rb by wikii) does it without the twisting... http://forums.sketchucation.com/viewtopic.php?p=129504#p129504
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@tig said:
... BUT the alternative third-party tool
FollowMeAndKeep(FAK.rb by wikii) does it without the twisting... http://forums.sketchucation.com/viewtopic.php?p=129504#p129504
Excellent, TIG, thanks for that!
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@tim danaher said:
@genma saotome said:
Every time the followme tool manages to go from the start all the way over to the far side of the arc...
genma, have you tried preselecting the curve before using the FollowMe tool? I find that gives more reliable results. But I've also noticed profiles twisting when using FollowMe, especially on long sweeps like spiral stair rails.
Yes, I do preselect the curve. Doesn't make any difference. The distortion seems to increase as the radius of the curve decreases. The distortion isn't large... a mm or two per degree of curve when the curve is very large (e.g., > 500m) but it becomes pretty obvious on tighter curves.
I'll try that follow me and keep script mentioned in another post.
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@unknownuser said:
Extrude a selected profile along a path. This tool solves the twisting problem that occurs when using Sketchup's standard followme tool on a sloping path.
@TIM
You have also 1001bits
(video of the tool)
A damned good tools box for architects! or other artists
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