T-Spline surface self-intersects.

[Anonymous]

Hi there, hopefully someone can help me out with this?

I'm very new to Fusion and even more so to the sculpt environment.

The file I have uploaded is for a quick conceptual architecture piece for school. Unfortunately I've got stuck at the error message in the title and cannot progress into the model mode. Essentially I want the sculpt body to intersect itself but it doesn't work so simply, foolish of me really aha! So I need to find some way of combining the two? So that it is one body not an overlap I guess?

Anyway I found this forum, where they seemed to be experiencing the same problem that was in fact solved, however I'm so inexperienced that I am unable to follow the instructions, namely the first one to start with; splitting the body (whilst still in the sculpt environment I can only assume?).

I would be really grateful if someone could help me; I'm finding it hard to progress with my project and CAD further ideas when I'm unclear as to what is possible and achievable with my limited abilities on the software.

Sorry for being a nuisance, look forward to hearing from you!

Thanks,

Ella

P.S. it's Body 2, ignore the others!

[TrippyLighting · Accepted solution]

Here's a fixed version. You should regularly check your geometry in box mode and not model everything in smooth mode. thats what created this contorted geometry.

There fix shown in the forum post you linked to would not have worked here.

[Anonymous]

Thank you, would you mind letting me know how you did this so I could have a play around with it?

Ideally I wanted the more defined intersection appearance rather than the blend between the two if that makes sense, the whole body's form seems to have changed a little in the process too. I had been checking box mode as I have seen that instructed in videos. Although I wasn't able to find a video about producing purposeful intersections (presumably because I've gone about this the wrong way) so really didn't know what I was supposed to be looking for in box view. I had always intended on the intersection; since it was my first time using it I didn't know it would be an issue unfortunately.

Thanks for your help,

Ella 

[TrippyLighting]

 The intentional intersection at the “head of the snake” was not the only intersecting geometry so I had to change some of the geometry in order for it to convert.

in most cases if you see intersections in a T-Spline in box mode  it will not convert and complain about self-intersecting geometry so that’s one of the things to check for. The other thing to check for is for polygons that are very stretched to get a specific shape. Usually that means that more edges/polygons are needed to approximate the geometry.

If you need sharper edges to have it appear as two more cleanly intersecting pieces, you could simply crease the edges and visually align the geometry so it appears as two surfaces intersecting each other.

[Anonymous]

Okay great, I'll know what to look out for next time! Thank you so much for all your help!
Ella

[TrippyLighting · Accepted solution]

I created a screencast that explains some of this and also a trick that allows you to have exactly the intersection you were looking for. Having problems uploading it ...

But attached is the model with a crisp intersection.

[Anonymous]

Oh wow that's great! Sorry for the late reply I moved onto another model and managed to miss the email notifying me of your reply.

I can sort of see what you did in the timeline and am going to have a play around with the original model to see if I can replicate what you've done so I can understand fully. I predict I'll get stuck to if you could perhaps give uploading the screencast another go that'd be really helpful!

Thanks again,

Ella