Create a 3D solid object from a space bounded by surfaces

[Dadgad]

 

Regarding to your polygon approach, seems like it can only create a regular shape, so this solution doesn't seem to be able to apply to a general situation.

 

The very simple to generate and accurate polygon is a stepping stone, after it is EXTRUDED or PRESSPULLED to make a solid, and then sliced (I used the circle to slice it) yields the fundamental shape from which the other is built.

 

I originally suggested you use the LOFT command and loft that polygon up to the end of that perpendicularly bisecting line (with the POint option), I don't use loft very much, and the resulting shape was very nice and interesting, but lacked the flat facet faces which you seem to be going for.

[luckyvictor]

"I have created several surfaces, and in the 3 dimension space, these surfaces enclose a closed space, and so now I am looking for a solution to fill up this empty space to turn it into a real solid object."

 

[ATTACH=CONFIG]34734[/ATTACH]

 

It's a solid now.

 

How did you do this please?

[luckyvictor]

I never use surfaces, always model solids, so I would be the last one to help with that.

While your model might look funny mounted on a ring, no doubt its creation would provide many valuable lessons and insights.

 

The diamond is really just an example I could think of at that time, since a diamond usually involved some cutting, so initially I thought I could use the example of cone and some cutting faces to illustrate my problem. However it didnt work too well, so I created another random object which are made with some surfaces.

[ReMark]

How did I do it?

 

I used your underlying geometry, except for the part I thought was wrong, and extruded it. I re-configured the rounded end at the far left in your original drawing and used the loft command.

[luckyvictor]

ok, I get what you mean.

 

Thus in AutoCAD, there is no function to select an enclosed space and turn it into a solid, right?

 

I can think of a better analogy now, a 3 Dimension operation of planar, choosing an enclosed space (area) to create an solid (surface)

[ReMark]

There is no function like you describe to turn an enclosed space into a solid in AutoCAD.

[Dadgad]

I think you should take a few minutes and open your MODELING toolbar and look at the commands there, that will probably clear up a lot of questions you might have, and get a feel for what options ARE available when modeling. Once you have a good feel for them, open your SOLID EDITING toolbar and do the same thing with those.

[ReMark]

When one extrudes a line or an arc the result will be a surface. It has no thickness until you add one to it via the Thicken command.

 

When one uses PressPull on an enclosed shape consisting of lines, arcs or polylines the result is a solid. The command gives the 2D object its height. If one cuts through this 3D object using the Slice command they will see that it is indeed a solid.

 

You can also use the Extrude command. For example, if you extrude a circle you'll end up with a cylinder. Extrude a series of lines that enclose a space and you'll end up with surfaces unless you first join the lines together to form a single continuous entity.

[luckyvictor]

Because regarding to my question, I can only think of one way to do it, which is to create a block, a big material block, then creates the surfaces I want, and trim. However, since there is a sculpt function under the surface editing menu, thus I think whether I can alternatively use the sculpted surface to create my object. As sometimes trimming an object may require to do it in the correct sequence.

[ReMark]

You mean you are going to create a solid (extruding a square for example) then start trimming off portion of it using the Slice command? Seems rather laborious to me.

 

What exactly are you attempting to create as the end product? Is this object so complicated you can't figure out any other way to create it? Maybe you are using the wrong program. Post an image of this object. Grab one from the Internet...we'll wait.

[JD Mather]

Did 2011 have the Sculpt tool (I don't know the command line command). This tool "flood fills" an enclosed set of surfaces with solid body.

[ReMark]

Is this more like you're interested in?

 

"Flood fills"? Never heard of it. I'll have to look that up. Thanks.

[JD Mather]

There is no function like you describe to turn an enclosed space into a solid in AutoCAD.

 

Wrong answer - if I follow the problem description.

 

I think this might have been added in 2012 on the Surfaces tab.

[ReMark]

No cause to get pushy there big guy.

 

You're talking about SURFSCULPT command? never knew it existed until now. Normally I don't work with surfaces.

[JD Mather]

I'm just saying.... the OP could be gone having now given up.

[JD Mather]

I never use surfaces, always model solids, so I would be the last one to help with that.

 

I think you should take a few minutes and open your Surface toolbar and look at the commands there, that will probably clear up a lot.

 

There are a bunch of surfacing (older) tutorials in my signature.

[ReMark]

I doubt that he's gone.

 

>

 

Here's a six sided object created from a combination of surfaces and meshes.

[ReMark]

Here is the same object converted to a solid using SURFSCULPT on the left. On the right is the same object but it has been sliced.

 

So, bottom line...JDM is right, there is a command that will do what you want and I was not aware of it.

 

Is everybody satisfied now or do I have to thrash my chest with birch branches too?

[Dadgad]

I think you should take a few minutes and open your Surface toolbar and look at the commands there, that will probably clear up a lot.

 

So you're suggesting that I investigate a few 'futuristic' commands in this 'antiquated' software? Is that where we're headed here? You're not gonna make me explode anything, right?

Well JD that sounds like a fantastic suggestion, didn't know those existed, thanks. They look very useful for those working with non-rectilinear shapes.

Most of the modeling I do is profile based steel, Nurbs, never been there either!

Looks like I've got a little research to do, which suits me to a T.

[Dadgad]

I'd enjoy to see that, hey he taught us both something, while scrupulously avoiding the M word.

Those are great commands, I will definitely be checking them out on the morrow, as it is kinda late here now.

Thanks JD, glad to see that you got away from those ANONYMOUS guys.