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Unable to use CUT operation with volumetric lattice

15 REPLIES 15
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Message 1 of 16
abaxy
517 Views, 15 Replies

Unable to use CUT operation with volumetric lattice

Hello, 

Recently, I created a volumetric lattice with one cell. Then I created a new body in the form of a cube overlaying the lattice. Now I wanted to perform CUT operation with target body as the cube and tool body as the lattice. However, I am getting error saying this operation cannot be performed. Any help would be appreciated.Lattice and cubeLattice and cubeerror1.png

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15 REPLIES 15
Message 2 of 16
TheCADWhisperer
in reply to: abaxy

@abaxy 

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

 

What body types do you have?

Edit:  Do you have a mesh body and a solid body?

Message 3 of 16
abaxy
in reply to: abaxy

 

 

 

Message 4 of 16
abaxy
in reply to: TheCADWhisperer

Hi, the file can be accessed with the following link: https://drive.google.com/file/d/1XrW6lTwtqPT6kgoIOC-toPVcT-H7Igh4/view?usp=sharing

 

Regarding your questions:

I don't know if volumetric lattice operation creates a solid body or a mesh or surface. Sorry.

Message 5 of 16
TheCADWhisperer
in reply to: abaxy


@abaxy wrote:

I don't know if volumetric lattice operation creates a solid body or a mesh or surface. Sorry.


Yeah, I couldn't figure it out either.

It seems to be undefined without the extension.
I don't have the Volumetric Extension - will have to see if I can get it to do some experimenting.

Message 6 of 16
abaxy
in reply to: TheCADWhisperer

Thanks! I have the academic version. So, I can access the feature for a limited time.
Message 7 of 16
jeff_strater
in reply to: abaxy

The lattice works correctly.  You just have two bodies occupying the same space, one of which obscures the latticed body:


Jeff Strater
Engineering Director
Message 8 of 16
abaxy
in reply to: jeff_strater

Hi Jeff,

I am aware that the two solids occupy the same space. I want to use the CUT operation on these two bodies. Specifically, I want to cut the 'whole' cube ('target body') using the volumetric lattice as the 'tool body'. This is the operation I want help with.

Message 9 of 16
TrippyLighting
in reply to: abaxy

The lattice geometry, under the hood, is mesh based. It does not interact with any of the other usual Fusion 360 modeling tools.

Peter Doering
Message 10 of 16


@TrippyLighting wrote:

The lattice geometry, under the hood, is mesh based. It does not interact with any of the other usual Fusion 360 modeling tools.


Can it be exported as a mesh body?  

If yes, my idea was to bring it back into Fusion as a mesh body.

Message 11 of 16


@TrippyLighting wrote:

The lattice geometry, under the hood, is mesh based. It does not interact with any of the other usual Fusion 360 modeling tools.


This is not precisely true.  Lattice geometry is volumetric.  It is not mesh based.  But the result is the same, it does not interact with other geometry (BRep, T-SPlines, or mesh).  So, you cannot subtract it from BRep geometry.

 

@abaxy :  "I want to use the CUT operation on these two bodies. Specifically, I want to cut the 'whole' cube ('target body') using the volumetric lattice as the 'tool body'"  

 

But, why do you want to do this?  Are you just trying to get the inverse of the lattice?  For what reason?  If so I suspect that there is a way to modify the lattice to get the inverse of what you have there, but it may take the advanced UI to get there.  I am not an expert on this, though.

 

Yes, you can export the lattice as a mesh.  In this simple case, it would be a reasonable sized mesh, but if you want to use it on a larger model, or a more dense lattice, that mesh will likely be huge.  And, you still won't be able to subtract it, because mesh geometry and solid geometry are not compatible, either.  You can convert the mesh to a BRep, using the "faceted" method, but I would not recommend that, because it would be very slow, and the resulting BRep will also be very slow.

 

Perhaps if we understood your ultimate goal, we could describe a way to get there.


Jeff Strater
Engineering Director
Message 12 of 16
abaxy
in reply to: jeff_strater

Dear Jeff,
Yes, I want to get an inverse lattice. Can you redirect this query to someone who knows a way to achieve this? Or tag some experts.
Message 13 of 16


@jeff_strater wrote:

@TrippyLighting wrote:

The lattice geometry, under the hood, is mesh based. It does not interact with any of the other usual Fusion 360 modeling tools.


This is not precisely true.  Lattice geometry is volumetric.  It is not mesh based. 


Aha, interesting. Thanks for the feedback!

 


@jeff_strater wrote:

But the result is the same, it does not interact with other geometry (BRep, T-SPlines, or mesh).  So, you cannot subtract it from BRep geometry.

 

Yep, that I was aware of 😉

Peter Doering
Message 14 of 16
TrippyLighting
in reply to: abaxy


@abaxy wrote:
Yes, I want to get an inverse lattice.


Understood. the question was: why? What is the ultimate goal?

 


@abaxy wrote:
Can you redirect this query to someone who knows a way to achieve this? Or tag some experts.

As the director of software development, Jeff is the expert. However, he has limited influence on what features are getting implemented and when.

Peter Doering
Message 15 of 16
abaxy
in reply to: TrippyLighting

Academic interest is the reason. I have just started exploring AutoDesk Fusion.
Message 16 of 16
TrippyLighting
in reply to: abaxy

What physical artifact are you trying to create?

How do you intend to manufacture it?

What is the purpose of the physical artifact?

Peter Doering

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