Hi Daniel, A method, complementary to Tom's approach, consists of using boolean tools in 3DSMax (and in Maya I suppose): the clipped object to be printed is the intersection between your object and a plane. Then you export in 3DS. I can try (I had to do this few months ago). Let me know. Damien Le 14/05/2010 03:15, Thomas Goddard a écrit :
Hi Daniel,
I don't think any 3d printer software is going to do the computation to handle clipping planes.
What you need is that objects that intersect the clip plane have to be rerendered with a capping surface over the hole created by the clip plane cut. Chimera can make such caps for surface models but the cap surface is detached from the surface that is being cut -- the edges are very close so it is not noticable. That probably won't work for printing a 3-d model. But it is possible to compute a cap surface using surfaces generated from volume data, which can in turn represent a molecule using the molmap Chimera command. This method just displays a subregion of the volume say limiting the z size of the volume grid. To cut along other axes you could rotate the map using resampling. This is all a bit complex but I have used it to print models on our uPrint 3-d printer. This kind of computational geometry for cap surfaces is usually done in CAD (computer aided design) software like SolidWorks.
Tom
Thanks Greg. I viewed the file with BS Contact and it was fine; Adobe 3D reviewer is the problem. For clip planes, you suggest X3D, but clip planes don't seem to work for that format either. Even if it works, the Zcorp printer does not read X3D- only VRML, PLY, 3DS, and ZPR. Should I give up on the idea of printing a clipped model?
On Thu, May 13, 2010 at 2:35 PM, Greg Couch <gregc@cgl.ucsf.edu <mailto:gregc@cgl.ucsf.edu>> wrote:
On 05/13/2010 11:18 AM, Daniel Gurnon wrote:
Hi all, I'm thinking of the 3D printing of physical models, and how informative clipping planes can be....would it be feasible to add capped-clip planes to vrml output?
Alas, VRML does not support clip planes, you have to use X3D. Does Adobe 3D reviewer have X3D support?
I also ran into a problem when I exported a surface to vrml and tried to view it with Adobe 3D reviewer. The color information didn't transfer. This isn't a problem when saving ribbons or bonds as vrml. Dan
Double check that the surface displays correctly in a VRML viewer, eg., BS Contact, Octaga, etc. And if it does (and I predict it will), then the bug is in the Adobe 3D reviewer's VRML import code.
- Greg
-- ____________________________
Daniel Gurnon, Ph. D. Assistant Professor of Chemistry DePauw University Greencastle, IN 46135
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