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Extruding a solid from a non-planar profile
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Jolyon  
#1 Posted : Saturday, February 24, 2018 10:51:20 AM(UTC)
Jolyon

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Extruding a solid from a non-planar profile

Can you do it - or can't you ?

It's really just the inconsistency I'm struggling with ...

1. - Take a non-planar profile - you CAN'T extrude it !

However, make a non-planar surface (eg. cover surface)

2. - You CAN'T extrude it using the 'by distance' option (say 20mm)

3. - But you CAN extrude it using the 'by vector' option (same 20mm)

So - my question is - why the difference ?

You clearly CAN extrude a non-planar profile into a solid

Why then is the extrude tool lying to me in points 1 & 2 above

Shouldn't we be striving to strip out such inconsistencies (- if only by adding the workaround to the error dialog)

Jol

Edited by user Saturday, February 24, 2018 10:52:49 AM(UTC)  | Reason: Not specified

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thanks 1 user thanked Jolyon for this useful post.
L. Banasky on 2/24/2018(UTC)
L. Banasky  
#2 Posted : Saturday, February 24, 2018 12:25:23 PM(UTC)
L. Banasky

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Hi Jol,
Thanks for a very handy work around, the Curves Not Planar Pop Up appears a lot for me.
Strange, if you Delete the Cover Surface, you have an extruded non planar solid.
Larry

Edited by user Saturday, February 24, 2018 5:42:40 PM(UTC)  | Reason: Not specified

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murray  
#3 Posted : Saturday, February 24, 2018 4:31:37 PM(UTC)
murray

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Extrude by distance assumes a "normal" extrude, ie what would be normal to a planar surface. Non-planar surfaces don't have an obvious normal, but a definite vector removes the ambiguity.
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