Rhino for Dummy question


#1

Hi there, new to Rhino so bare with me.
How and What is the best way to create solid cone and pyramid with fillet top corners
I would like to create studs like this

but avoid sharp corners
Pyramid,TruncatedPyramid,Cone commands all create sharp corners


(Pascal Golay) #2

Hi Jhon - the easy thing is to run Pyramid > NumSides=4, then FilletEdge the result, window selecting all edges at once. Is that what you need? For a softer slightly ‘hand made’ feel it is a bit more work…

-Pascal


#3

Thanks for the quick reply.
No luck there FilletEdge kills the solid shape and wont fillet the top corner.
BTW how to create Pyramid with parameters? I would like to have a 6mm*6mm pyramid


(John Brock) #4

If you’re serious about learning about modeling in Rhino, here’s a link to the User’s Guide.
It’s a good collection of progressive tutorials to get going with Rhino pretty quickly:
http://docs.mcneel.com/rhino/5/usersguide/en-us/index.htm


(David Cockey) #5

Pyramid followed by FilletEdge works for me. The result is a closed polysurface which is solid in Rhino. pyramidfilletDC1.3dm (147.5 KB)


#6

Once you have made the filleted pyramid you can use CageEdit (parameters set to: X=5, Y=5, X=5, ,3,3,3) for making slight deformations to the shape. Turn control points on and start dragging.

Good control over “reasonable” deformation can be achieved with the pyramid placed in the 45 degree angle as in the file posted by davidcockey.


(David Cockey) #7

@RIL Did you mean BoxEdit rather than CageEdit? BoxEdit gives more direct control of the dimensions of an object such as a pyramid. I’d apply BoxEdit before fillteting if the fillets need to have circular arc sections.

Nothing special about the orientation in the first example I posted. It can be changed using Rotate.

Attached is another filleted pyramid made using two helper points. The size before filleting was 10 x 10 x 5. Two size fillets were used, following the rule of doing fillets from largest radius to smallest radius. pyramidfilletDC2.3dm (167.4 KB)


#8

It’s true that BoxEdit is useful for setting the dimensions, but I really meant CageEdit for making the surfaces and fillets (the entire shape) more irregular so as to make it look more like handmade, like so :

:slight_smile:

// Rolf


(David Cockey) #9

Agree CageEdit is the tool to use for deformations. I mis-understood your earlier post.