3d shape

Replies to This Discussion

Permalink Reply by Kevin Lee Allen on July 22, 2010 at 2:22pm

Make 1, not 3 and add them together. Then Loft Surface with Rail?

• ▶ Reply

Permalink Reply by Glenn Grubbs, AIA, LEEDap on July 23, 2010 at 11:23am

Thanks for the suggestion, Kevin. Good idea to simplify.

I have attached the latest sketch, but still do not seem to be able to make it work. The line types are 3D Polys, but I have also tried Lines, and Polylines. I select the Loft from one rail mode, but cannot make a selection on the screen to choose the rail. Any suggestions?

Attachments:

• VWsketch2.jpg, 28 KB

• ▶ Reply

Permalink Reply by Nick Williamson on July 25, 2010 at 2:16am

Glenn

Is this the sort of thing you are after? I have no idea what measurements you are working to but the basic concept might work or you

Nick

Attachments:

• x1.JPG, 77 KB

• ▶ Reply

Permalink Reply by Glenn Grubbs, AIA, LEEDap on July 25, 2010 at 8:59am

That's exactly what I'm trying to do! How did you do it?

• ▶ Reply

Permalink Reply by Kevin Lee Allen on July 26, 2010 at 6:50am

I'm not sure what Nick did, but drawn the lines and convert to NURBS curves, then loft?

• ▶ Reply

Permalink Reply by Glenn Grubbs, AIA, LEEDap on July 26, 2010 at 9:38am

I've tried to convert to Nurbs, but the result is 'invalid object' (see attached screen capture). I've tried converting to lines, 3d polys, etc., but still get the same result when trying to convert to Nurbs. Hopefully, I'll hear from Nick about how he did it, or I'll have to try another method, maybe solids and fillets.

Thanks!

Attachments:

• VW3.jpg, 54 KB

• ▶ Reply

Permalink Reply by Nick Williamson on July 26, 2010 at 10:12am

Glenn

I have been a bit busy but here is a quick description.
1. Create the selected profile in a front elevation view.
2. Extrude it half the total length you need. (in elevation)
3. Go to the left or right elevation and create the 'negative' end profile ie a concave version of the end section of the other profile (i hope this makes sense!!)
4. Extrude this so that it is slightly deeper than the WIDTH of the first extrude
5. Move the resultant extrude so that it cuts across the end of the first extrude..are you still with me?!
6. Go to the plan view and move it so that it straddles the first extrude.
7. Select both extrudes and Subtract Solids. You should end up with one half of the final shape.
8. Select this and mirror it to complete the whole and then Add Solids to merge them.
9. You should end up with one complete shape. Simply mirror again to get the required number

Tell me how you get on..I might be able to do some diagrams later if all of this is too confusing, unclear or mad....in fact I've added one which might clarify things.

Nick

Attachments:

• Vectorworking3D.JPG, 199 KB

• ▶ Reply

Permalink Reply by Glenn Grubbs, AIA, LEEDap on July 26, 2010 at 12:31pm

It worked - thanks Nick!

Attachments:

• VW3.jpg, 54 KB

• ▶ Reply

Permalink Reply by John Zabriskie on April 13, 2011 at 1:47pm

I would suggest a simpler process:

1) extruding each profile as you've drawn above, one on the x-axis & one on the y-axis;

2) ensuring the blocks are the same size looking from the z-direction [so the bases of the profiles coincide];

3) intersecting the two solid objects.

Then you can create a symbol of the resulting block & replicate it -- rotated about the z-axis where required to create the panel of anechoic chamber foam. The symbol conversion reduces the memory footprint & allows easy editing of the shape, if required.

• ▶ Reply

Permalink Reply by John Zabriskie on April 13, 2011 at 5:22pm

Caveat: ensure the width of both profiles & the extrusion depth is the same. Attached is a file demonstrating the above with a 5 x 7 panel. It looked better when I edited the symbol & put fillets on some of the sharper edges.

Attachments:

• anechoic.vwx, 694 KB
• anechoic2.png, 403 KB

• ▶ Reply