Creating solids from 3D faces?

Is it possible to create solids from 3d faces? I have a wedge that is irregular. One end is a different configuration from the other.

Is it possible to create solids from 3d faces? I have a wedge that is irregular. One end is a different configuration from the other.

friend can you post an image of what your trying to do?

well see if what we can do

attached are two examples of wedges that have unequal ends. They are constructed of 3d faces. I cannot subtract the wedges from a 3d solid because although they look lke a sollid when shading is applied they have no volume

Unequal_Wedge.dwg

You can combine your "wedge" using 3 tetrahedrons, made by my attached lisp (see the upper blue "wedge" in the drawing.)

Dont forget the UNION-command for making a unique "wedge".

Good luck

Jochen

tetra.lsp

Unequal_Wedge_tetra.dwg

If those where 3D faces, you could cut a solid with them - there should'nt be any problem. But I think those are only polylines.

The easiest way would be with the LOFT command, but I think Cad2006 doesn't offer it.

So, in this case I would choose to cut a box (containing the whole figure, of course) with the cut option "3 points" (it's frequently my favorit cut operation :wink:).

there are several ways to complete this. LOFT and SWEEP were introduced in acad2007 so you do not have access to those. In 06 I do not believe you can use a 3d face as a slicing plane like you can in 07+. For this specific case i would use the geometry you have, draw a box(command BOX) larger than your wedge, then use the SLICE command and 3point option. Select the endpoints of your base and one of the peaks of your wedge for each slice operation(2 needed).

Unequal_Wedge1.dwg

If those where 3D faces, you could cut a solid with them...

Can you post a demonstration of this? I haven't seen that functionality without running convertosurface which did not appear until r2007.

But I think those are only polylines....

Wouldn't a simple List answer that (no, they are not polylines' but 3D Faces as the OP indicated.

So, in this case I would choose to cut a box (containing the whole figure, of course) with the cut option "3 points"

Can you post a demonstration of this command, I am not familiar with it?

JD Mather, slice with surfaces appears after Cad2007, as well as loft, that's why I proposed slicing on 3 points (ok, I used the word "cut", in Spanish you use the same word). Shift1313 chooses the same operation and also describes it.

So, when you pick "slice", you're asked to select the object to be cut. There you get the option "3 points" on the command line. You have to select 3 points on the cutting face (the points mustn't be colinear). Finally, you have to choose whether you want to keep both peaces of the sliced 3D object or not.

(ok, I used the word "cut", in Spanish you use the same word).

I suspected that it was a lost in language translation error. We need to be very careful in using AutoCAD command names for users without experience.