[V8i SS3] Converting 3D shapes into a single solid

Jamie Mackenzie said:

I have constructed an irregular 3D shape

Why not post your DGN model so others can analyse it?  Use the Insert image/video/file menu to attach a file to your post.

Example.dwg

I

I'm looking for the total volume of the shape on the left. I have split it into several smaller individual simper shapes on the right. If I can work out how to convert the shapes (either the main one or each of the smaller ones) into solids then I can then determine the volume.

Brien,

That's perfect, thanks! I knew it would be something simple!

Cheers

Jamie

Brien,

OK, your advice works for some of the shapes...... however, some of the surfaces refuse to stitch. I have gone back to the 'shape' and made sure all the snaps are... snapped and then re-created the surfaces, then tried to use the stitch surfaces function. Some work and some don't. Is there any fundamental issues that prevent them stitching? I was thinking there could be a gap between the surfaces somewhere but by checking that theres only a single snap at each junction (3 lines) this can't be the case.

Head scratcher!

Jamie Mackenzie said:

some of the surfaces refuse to stitch

Post a DGN example of those elements.  Annotate so that it's clear to another person which pairs of surfaces won't stitch.

Hi Jon,

See attached .dgn file.

Shape 1: Surfaces added, surfaces stitched OK, solid formed OK. Volume measurement tool works fine.

Shape 2: Surfaces added, surfaces stitched OK, solid formed OK. Volume measurement does not work - 'Cannot measure volume of this element'.

Shape 3: Surfaces added, surfaces stitched OK, solid formed OK. Volume measurement tool works fine.

Shape 4: Surfaces added, surfaces fail to stitch - 'Unable to form operation'.

Shape 5: Surfaces added, surfaces fail to stitch - 'Unable to form operation'.

Thanks

Example 2.dgn\

Hi Jamie,

The identification of the shapes are far away from them (near the origin) so it turns out to be more difficult for us to identify them. Nevertheless this is what I found:

Shape 2 - You can't measure a solid that is open, so in fact this is a Smart surface as the tag shows:

Shape 4 - as you can see the back face is not in the correct position so you can't stitch this:

Shape 5 - the same as shape 4 you have some misalignment shape so you can't stitch this.

Solution - correct the faulty shapes and then they can be stitched.

Hope this helps and regards.

Hi Jamie,

The identification of the shapes are far away from them (near the origin) so it turns out to be more difficult for us to identify them. Nevertheless this is what I found:

Shape 2 - You can't measure a solid that is open, so in fact this is a Smart surface as the tag shows:

Shape 4 - as you can see the back face is not in the correct position so you can't stitch this:

Shape 5 - the same as shape 4 you have some misalignment shape so you can't stitch this.

Solution - correct the faulty shapes and then they can be stitched.

Hope this helps and regards.