Boolean operations

[Lei Lei]

Dear STKO,

Can I use Boolean operations on volumes and surfaces in STKO?
For example, use a face to cut an object into two parts, or a line to cut a face into two parts.

Thanks for your reply!

[STKO Team]

Sure, use the Merge command

[Lei Lei]

Hi,

If I use 'Merge', only the separate ones are turned multiple into one.

I want to find a method to cut a 3D geometry into two parts by a plane.

I tried 'Subtract', which only saves the parts of the two geometers that do not overlap. It isn't what I want.

Looking forward to your reply!

[STKO Team]

The "Merge" is the foundation of every boolean operation.

In your case you can:

• Merge
• Explode

[Lei Lei]

Thanks！

It does make sense!

By the way, after merging and exploding, is there any way to combine multiple geometers into one without retaining contact surfaces?

And, I found that after merging, it is impossible to copy, move, and so on the substructure. It seems that the components still belong to 'merge' without independence.

[STKO Team]

It's not clear to me.
Can you share your model and a sketch to explain what you are trying to obtain?

[Lei Lei]

Certainly!

I've imported a 3D segment model and utilized a plane to execute a cut using operations like 'Merge' and 'Explode', similar to what's depicted in Figure 1.

Figure 1

13be196168819f788bb4dfb1ebc1fe4.png (161.72 KiB) Viewed 2832 times

Now, my objective is to modify the right segment independently. However, despite the explosion, each part remains grouped within the 'Merge' operation, hindering individual manipulation as seen in Figure 2.

figure 2

6e3b8bbde45ae62c6846d4dc5e2de3a.png (241.24 KiB) Viewed 2832 times

[STKO Team]

Repeat the explode command on that geometry. The explode command may be used multiple times in nested loops

[Lei Lei]

Thanks for your reply!

By the way, after merging and exploding, is there any way to combine multiple geometers into one without retaining contact surfaces?

I still have this question.

For example, I hope to union the A and B without a public surface.

However, whether I use 'union' or 'merge', there is still a public surface.

Is there any way to solve it?

Thanks!

[kesavapraba]

Hi, You can handle the individual geometry after the explode command executed multiple times. So, the extra surfaces can be deleted.
Just a suggestion for the first issue that you pointed out, why don't you make two copies (say 1 and 2) of the solid+plane geometry in the same workspace and do the merge for both and then use subselection for geometry to delete the right part after the plane for 1 copy and delete the left part before the plane for 2 copy. Doing so, you will have two separate geometries, you can bring them together at a common vertex.