About transfer the Clay model into 3D in Rhino

[oliveryiu110205]

I try to put my clay model into Rhino as a curve by tracing sectional slices
through cutting my model into slices and using InterpCurve to tracing each slices and finally lofting it. But it doesn't work as it messed up. I really need help. PLEASE!!! Because the shape of my model is complex, I cannot use slicing to contour my model. How can I make my model? Thanks indeed!!!

[oliveryiu110205]

Can anyone help me? It's pretty urgent. It makes me really mad at this work... really need help!!! Thanks!!

[Stowe Figler]

Try to simplify your clay model into sections or indiviudal shapes. They should be easier draw and loft in Rhino. Then when each of your features is individually created join them into one solid model or surface model. There should be a way to use 2D curves, loft them, and get your clay model ion the end, but it will require lots of work. You have to apply rules and parameters to the lofting operation for the surfaces to end up like your clay model.

[awerby]

The easy way would be to use a 3D scanner or digitizer. That's what they're for. But if you want to do this by hand, study your model carefully. Set it up on one point, so that you don't have multiple pieces of it in a single section. Make some drawings from different angles. Then. starting from the top, make a series of closed curves that represent sections of the model parallel to the table it's on, say 1/2" apart. If that's too hard, you can cut up your model into slices and trace each slice, arranging them in order with the correct spacing. Establish a point at the top and the bottom, where the ends would be.

Now, using your sketches as a guide, make a series of curves that intersect each one of these section lines, starting from the point on top and ending at the point on the bottom. Use the Point and Near O-snaps to make sure each one actually connects to the points and horizontal curves. Try to keep the spacing even, and keep making these open curves until you've gotten all the way around. Then select all those curves and points and use the NetworkSrf command to produce your surface. If it's not quite right, delete the surface and turn on the curve points (F10) so you can tweak them into position, and try the surfacing command again.

Andrew Werby
ComputerSculpture.com — Home Page for Discount Hardware & Software

[bostosh]

I looked at the pictures and cannot foresee any problem.
The "slices" you mention are they in CAD or physical slices?
Do you have x,y point data at differing z plane heights?
I would probably do this in a different method other than slices.
I have a probe type digitizer, would build discrete surfaces, trim, fillet and stitch into solid.

[flux_001]

oliveryiu110205-

If I understand this correctly- because of the geometry a linear series of sections won't be as productive for you. I would recommend two options the tsplines plugin for rhino or go the free route and load grasshopper and then weaverbird and first model the part in simple mesh geometry and then run the surface/solid through. see the attached image for an example of the grasshopper definition and the associated mesh. I started with a mesh cube and then stretched the corners out then ported it to weaver bird in grasshopper using catmullclark.

For help on this go to grasshopper forums and you can figure this out.

hope this helps

-flux

[oliveryiu110205]

I am new to all computer software, but thanks for you suggestion anyway. I try to form a similar shape. although I really want to make an accurate one but time is not allowed. The one you made is really I want to make. Really appreciated. Thanks guys.