Full Version: Please Help Me with My Occasional Questions

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Where is the 3dm ?

(Vertical is not made her...

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Hi friend, the regular Extrude Tapered option only works on planar objects. To speed up your case there though you could use the Construct > Offset > Shell command.

To use that you can skip creating the second surface and the lofting, instead start with just one trimmed surface:



Then run Construct > Offset > Shell and give it a thickness. That will generate an offset surface which for a sphere will be a scaled sphere, and it will do a loft between the edges of the offset and the original for you, giving this result:



- Michael

Image Attachments:
friend_shell1.jpg  friend_shell2.jpg 

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The vertical one (all that will be more easy when a Box deformation will existing! :)
(take all points except the vertical one on the right for make the 1D by the middle)

Normally you will have a sort of tapered volume of the original :)

Maybe there is more tricky but for the moment that is my speedy try! :)

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In fact seems a Scale 2D Front then 2D Front Right gives a cool result!

Separate the volume so all faces are free
Show Points
Select only all Points on a 3D side (so the principal face don't be changed)
Make a Front Scale 2D from 3D middle center
Make the same value Right Scale 2D from the same 3D middle center
Join all

You have a tapered volume without Box Defomation!
I will com back with the good second scale ;)
because here there is a little error!

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I'm sorry Frenchy, I have a hard time understanding your techniques. Is your technique only for boxes and not various curves?

Michael, the problem is that the Shell command cannot have its angle changed unlike with a planar surface or curve.

Image Attachments:
moihelp 35.PNG  moihelp 36.PNG 

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Normally that must woks for any volumes! :)

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Hi friend, it's very helpful if you could please post the .3dm model file of your objects instead of only a screenshot.

For example in this case I would have been able to test with your objects and that may have helped me notice that you wanted a steeper angle result.

So yes Shell produces lofts that are aligned with the surface normals.

If you wanted to do Loft then a quicker way than doing Loft many times would be to use Edit > Join so you had 2 curves which each were made up of 8 segments. Then you can loft between those 2 joined curves. When there are the same number of segments in each curve that will be the equivalent of doing each loft individually between segments.

Another way that might be useful would be to make a planar tapered extrude and then beam that onto your sphere using projective Flow. Position the base plane for the flow a little ways inside the shape so that when it's projected the top surface doesn't try to skim directly along the sphere surface because that then makes for difficult booleans.

So that would look like this:

Create planar curve:



Extrude tapered:



Create base plane for flow positioned like this:



Flow with "Projective" option:



Boolean difference:



- Michael

Image Attachments:
friend_flow_tapered1.jpg  friend_flow_tapered2.jpg  friend_flow_tapered3.jpg  friend_flow_tapered4.jpg  friend_flow_tapered5.jpg 

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A volume with different curves

Diff the part to taper

here I kill the Top / Bottom faces + one face of the no Tapered part (not indispensable - its just for see the internal volume :)
Separate
Show Points for easy selection of points who will "scaled"
Scale 1D on the Height by a middle
Scale 1D on the Width by a middle

NetWork Top / Bottom
Join All
= I have a Solid

Follow 2 "tapered" from different start face

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;)

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Taper any single surface is like some trivial ;)
Must exist tone of methods...

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Free to you to put Shell or not...

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Michael, thanks. Both of those solutions work excellently. Excuse me for not uploading a scene- I assumed that really simple things were easy enough to recreate.

If you scale an uneven curve a "flat" message will appear letting you know it is planar and can be used for Boolean and Trim but is there a way to flatten at an angle? I have a wavy surface, created a curve on it using surface snap but Trim and Boolean don't work. If I scale on an axis it will ruin the shape- I need it to flatten at an angle. Scene included.









Frenchy, I think I have recreated your gif but I can't get Network to work like you have.

Attachments:
network.3dm
scale until flat.3dm

Image Attachments:
moihelp 39.PNG  moihelp 40.PNG  moihelp 41.PNG 

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Moi is very permissive but it's better to have points at the same coordinates! ;)

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Maybe it's not that you want so don't hesitate to explicite more !:)

Extrude + Trim must make the trick...



I don't seen that you want flat thing...but if it's just for trim Extrude is sufficient
You can of course take a direction of the Extrude if you want...

You can also make Projection by your curve but the extrude is more illustrative and generally
it's better to make trim or Boolean Diff with surfaces than only curves in complex forms... :)

Ps when you send a file of objects better to put them on the middle of the grid than faraway on the 3D Space! :)

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Maybe set a cPlane?
- Brian

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Hi friend,

re:
> If you scale an uneven curve a "flat" message will appear letting you know it is planar and can be
> used for Boolean and Trim but is there a way to flatten at an angle? I have a wavy surface, created
> a curve on it using surface snap but Trim and Boolean don't work. If I scale on an axis it will ruin
> the shape- I need it to flatten at an angle. Scene included.

There are a few different methods - probably the quickest is to use Transform > Scale > Scale1D. That allows you to choose the direction of scaling so if you pick a direction perpendicular to your desired line in the side view then enter a scale factor of 0 that will do it.

If you want to use the edit frame and "flat" snap you could do that by setting the CPlane to your desired angle.

Also you could rotate your objects so the direction you want is aligned with the world axis directions then use flat snap.

- Michael

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Or that ? ...
After the trim
Extrude again
Draw a plane by 3 Points
Move it
Boolean Isect
et voilà :)
But don't know if it's that you want! :)

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Thanks for all the help.

Is there any way to change the top-right view during split view to be Front and have the bottom-right be 3D?

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Hi friend,

re:
> Is there any way to change the top-right view during split view
> to be Front and have the bottom-right be 3D?

Sorry no there isn't.

- Michael

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Hello, is there a way to limit what snapping affects or disable an object from being snapped to? Locked objects can still be snapped to...

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