I am after some gemstone basic shapes to help with jewellery designing.
I found some at
http://www.3dlapidary.com/HTML/Collections.htm

I can download the basic 3dm stones that will open in rhino but not in moi

any suggestions

thanks
shayne

As format 3Dm can be also just polygones (but not made by nurbs process) maybe it's for that you can't load it!

Hi Shayne, yes just to clarify what Pilou said the problem is those 3DM files only contain polygon mesh objects in them and not NURBS objects. MoI only reads NURBS objects from 3DM files.

There are a variety of different kinds of things that Rhino can put in a 3DM file, like NURBS, spotlights, dimensions, annotation text, polygon mesh objects, etc... each of which are pretty separate kinds of objects. MoI only writes and reads NURBS objects from 3DM files though.

A polygon mesh object is a different category of object that is made up of little polygon facets instead of smooth surfaces.

In Rhino you can convert those polygon mesh gemstone objects into NURBS objects by using the MeshToNURB command, which will convert each facet of the polygon mesh into a trimmed planar NURBS surface. If you then bring that over MoI will be able to see those objects.

Also see this thread for some other sources of gemstone models:
http://moi3d.com/forum/index.php?webtag=MOI&msg=3402.4

- Michael

thanks guys
a mate of mine has techgems for rhino
I will see if he can generate me some specific shapes
cheers
shayno

Hi Shayne,

You can also get some good collections of 3dm gemstones by downloading and installing Riccardo Constantini's JewelsLabLight or Squirrel or Brian Dinola's GemTools for Rhino. The installers will create folders with 3dm gemstone models that you can open in MoI, however I'm not sure if you'll need Rhino on your computer to install them properly.

Jesse