Search Search  
Today's Messages (ON)  | Unanswered Messages (OFF)

Forum: 3D Design
 Topic: Does your model need to have a continuous surface?
Does your model need to have a continuous surface? [message #97346] Fri, 29 August 2014 01:42 UTC
avatar justuscook  is currently offline justuscook
Messages: 1
Registered: October 2012
Go to my shop
Junior Member
I have been modeling in 3D and have mad a few objects that have been successfully printed. For those models I made sure that their surface was continuous. But I'm curious if it matters.

If I want to make a spiked ball, can I create a sphere and then create some cones and just move them so they intersect and stick out of the sphere, or is it better for printing to extruded out faces and make a spike from the spheres surface. I was thinkin that the printer might just calculate the "slices" needed to make sure my object was printed as a solid.

Just wondering if I need to take the time model things so each piece has a continuous surface or not.
Re: Does your model need to have a continuous surface? [message #97353 is a reply to message #97346 ] Fri, 29 August 2014 06:44 UTC
avatar AmLachDesigns is currently online AmLachDesigns
Messages: 1266
Registered: September 2011
Go to my shop
Shapie Expert
If I have understood correctly, the answer to your question is 'no'.

Your example would work as long as you ensure (as you say) that the individual cones intersect with sphere. Shapeway's upload software will merge all intersecting shells, fix holes etc. Of course if you wished you could Boolean join these yourself before upload, but it's not necessary.
Re: Does your model need to have a continuous surface? [message #97354 is a reply to message #97346 ] Fri, 29 August 2014 06:46 UTC
avatar mkroeker  is currently offline mkroeker
Messages: 1757
Registered: June 2012
Go to all my models
Shapie Expert
Both methods should lead to a printable mesh once your (or shapeways') software does a Boolean union of the sphere and intersecting cones. It would then depend on your choice of material whether the extrusion might be a bit advantageous (assuming that it provides some filleting between the ball and spike, which would be desirable for ceramics glazing and perhaps add a little stability in the case of the detail acrylics.

Logo

Hello.

We're sorry to inform you that we no longer support this browser and can't confirm that everything will work as expected. For the best Shapeways experience, please use one of the following browsers:

Click anywhere outside this window to continue.