Edit form moves surrounding unselected points

Edit form moves surrounding unselected points

Anonymous
Not applicable
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Message 1 of 13

Edit form moves surrounding unselected points

Anonymous
Not applicable

Hi everyone,
I'm a new fusion 360 user coming from 3ds max and maya.
I really love fusion 360 but ran across something I do not understand and hope someone can help me.
In the form creation mode I'm using "edit form" to move points around but I've noticed that when I do it will move the surrounding unselected points too and I do not want that.
I do not have "soft Modification" enabled.
Below I have an image of before and after moving one point, as you can see the 8 points around it move too which makes using "edit form" very imprecise and hard to use for me.
2018-12-16(18h13m41s)_screenshot_points_editform.jpg

Does someone know how to disable this behavior for edit form?
Kind regards,
Jeroen

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Accepted solutions (2)
1,552 Views
12 Replies
Replies (12)
Message 2 of 13

jeff_strater
Community Manager
Community Manager

@Anonymous, this is the nature of T-Splines (the technology underlying Sculpt bodies).  It's a kind of sub-division surface, so the smooth surface is fitted over a scaffolding, which you can view if you convert to Box Mode.  But, the smoothed surface will definitely show this behavior.  So, the short answer is:  you can't disable this behavior.


Jeff Strater
Engineering Director
Message 3 of 13

Anonymous
Not applicable

@jeff_strater, Thank you for the fast reply and explanation! I really appreciate it.
The free form workflow will probably not be the right solution for what I am trying to do then.
I was hoping you would be able to take a look at these screenshots (with annotations) of what I am trying to do and point me in the right direction.I am trying to remake a model I made using the 3dsmax booleans + zbrushI am trying to remake a model I made using the 3dsmax booleans + zbrushI was able to make the leg completely inside fusion 360 using the sketch workflow with use of loft and revolveI was able to make the leg completely inside fusion 360 using the sketch workflow with use of loft and revolveHowever I have no idea how to start creating something more complex like the body of this robot shown in the screenshotHowever I have no idea how to start creating something more complex like the body of this robot shown in the screenshot
I have tried extruding from the outlines of this shape and using them as booleans to cut the shape but that did not work as I hopedI have tried extruding from the outlines of this shape and using them as booleans to cut the shape but that did not work as I hopedthis was the resultthis was the result

If you would have any pointers as to where I should start looking I would be very grateful.
Kind regards,
Jeroen

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Message 4 of 13

TrippyLighting
Consultant
Consultant

Easy! Either in solid modeling Patch or Sculpt mode is this easy to do.

 

Can you export the design (.f3d) you have so far of that one object or the whole thing and attach it to your next post ?

 

I am a little  confused about your reaction to the vertex pull behavior that you describe in your Verzückung first post. Any Sub-D mesh model behaves that way, whether designed in Maya or 3DsMax or Blendder, Modo,C4d etc. this is intriniśc to the Sub-D method.


EESignature

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Message 5 of 13

TrippyLighting
Consultant
Consultant
Accepted solution

Here's one version. This can be done in almost infinite variants with increasingly more control over the shape.

 

Screen Shot 2018-12-17 at 6.35.47 AM.png

 

 

 

 


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Message 6 of 13

Anonymous
Not applicable
Accepted solution

If you are working in smooth mode the influence is two faces away in order to keep everything smooth. However if you model in box mode only the point you are working on moves. 

 

I would also model this most likely with regular features, but for future T-Spline modeling switching to box mode will likely help out greatly. If the box mode model looks good you're almost guaranteed that the smooth mode model will look great.

Message 7 of 13

Anonymous
Not applicable

Hi!
first of all @TrippyLighting you are and absolute badass! Thank you for taking the time to record the video and helping me out I deeply appreciate it.
After watching the video I now understand the whole idea behind sweeping, which I didn't before so I'm very grateful.
About the points moving with the t-spline modeling, I was referring too how the surrounding control points of the mesh move around when you move a single point.

In traditional SubD modeling the mesh indeed smooths itself between the control points but the actual control points stay at the same location when you disable the smoothing which makes it possible for me to line all of them up perfectly.

2018-12-17(12h41m57s)_screenshot_subd.jpg

The biggest problem I had with the form modelling yesterday is that I would move a point and then the surrounding points would move too so I had to then fix the position of those points but then the surrounding points of that point would move and so on.
It felt like utter madness to me haha.
However now after reading the comment from @Anonymous I understand that there is a way to preview the exact same thing as you would see in max or maya with the use of display mode.
When I set the display mode to "control frame display" I can actually see the control points of the mesh and am able to line them up perfectly.
control frame in fusion 360control frame in fusion 360control frame in 3ds maxcontrol frame in 3ds max
I want to thank both of you gentlemen @TrippyLighting, @Anonymous as you have helped me out tremendously and I truly appreciate it!
I hope you have a wonderful day.

Kind regards,
Jeroen

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Message 8 of 13

Anonymous
Not applicable

 

Hi, @TrippyLighting if you would be so kind.
I am currently trying out the method you showcased in the video but I am running into a different problem.
2018-12-17(14h37m19s)_screenshot.jpg
I think I understand why it is happening (the sweep would intersect itself trying to cut on the curved edge of the mesh) but I would love some insight if there is a way to get around this problem.
I have added the .f3d file to this post if you would like to have a look at it.

This morning I have found another topic where you gracefully helped solve a similar problem with a different technique and I'm going to try that one out now:
https://forums.autodesk.com/t5/fusion-360-design-validate/loft-around-axis/td-p/8073826

Kind regards,
Jeroen

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Message 9 of 13

TrippyLighting
Consultant
Consultant

You either have to make the initial filet larger, or the sweep profile smaller.

If that does not produce the geometry you are looking for, then you have to model it differntly.

 

 


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Message 10 of 13

TrippyLighting
Consultant
Consultant

Here's another model where I create the base shape as a T-Spline,  and then spit and thicken it to get to  solidd.

The best of both worlds. Great plasticity for free modeling but still having a solid to for worry free addition of all sorts of mechanical detail:

 

Screen Shot 2018-12-17 at 7.32.29 PM.png

 

 


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Message 11 of 13

Anonymous
Not applicable

@TrippyLighting thank you so much for the update.
I think this will be the way to go as I just tried out the loft workflow and it didn't turn out the way I was hoping it would (could totally be me not doing it right to be honest tho, I added the file if anyone wants to have a look at my mess).
There is a lot of pinching going on in the round transition part of the output mesh. 
2018-12-17(16h51m41s)_screenshot.jpg2018-12-17(16h51m24s)_screenshot.jpg
Next up I'll give the form + surface workflow a shot and let you know how it turned out!
Again, I really appreciate how much time you are spending on helping me out with this, you are a wonderful human being!

Kind regards,
Jeroen

Message 12 of 13

TrippyLighting
Consultant
Consultant

Make sure to reference the sketch origin in your sketches. 

 

Screen Shot 2018-12-17 at 8.26.31 PM.png

 

 


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Message 13 of 13

Anonymous
Not applicable

@TrippyLighting great succes! managed to make it work with the last workflow and the result is looking great.
Thank you so much for all the help with this, I wouldn't have been able to figure this out on my own, cheers!
2018-12-17(20h57m43s)_screenshot.jpg

Kind regards,
Jeroen