Someone else has made this 3d model in another software but its topography is bad and I want to just make it in Rhino .
I can make the shape but I have no idea how to do the criss cross patterns embossed. i would appreciate some help!
Thank you in advance.
Try the helix command to get one spiral line.
Pull to the surface or a similar way of finding an intersection.
Polar array from the top.
Mirror the set of spirals.
how do i get the helix to get on the surface? and the pattern has a thickness so how would i do that? thanks!
You can try the helix on the inside or outside of your surface, then use the āpullā command to pull the curve to the surface.
You have different options to build cutting surfaces, the easiest is to use the āpipeā command on the lines and then boolean difference them from the main object. Make sure the closed seam of your pipe is outside the part.
A common necessity is to extend the curves that you have pulled into the surface before making the pipe. This makes sure that the pipe extends past the edges and makes a clean boolean.
thank but its not a uniform cylinder its shaped like the picture so it tapersā¦not sure how to do the spiral if its not an even cylinder . sorry!
Using the outline curve of your vase, run Twist command. Use the center of the vase as the twist axis. Once you like the shape, use the Pipe command on it, and use polar array to create the rest. If that still doesnāt help, maybe post a file.
thank you peter. i tried doing this for the past 4 hours at first the twist worked then it didnāt. I am quite stuck. I am posting the shape which I have, i would appreciate the help.
advice.3dm (234.8 KB)
Hmmm thatās trickier than it looks. Iād maybe suggest looking at where one curve ends, and at those ends draw a line that would continue that curve. Then create a blendcrv between them. Adjust it so that it is close to what you want. Then use pull to pull it onto your surface. Also, before you do any of that, move your part to 0,0. See attached.
adviceback.3dm (243.2 KB)
thank you peter. can you save and send the file in rhino 6? sorry, I donāt have the latest one. I think i understand what youāre saying. ill give it a go.
Topology wise your base object is a cylinder, however I think ārevolved shapeā is a better description.
so i managed to do this, the twist, and then the mirror, and then the pipe to get this. so thanks for that! however now when I boolean it doesnāt work and I get question marks on the screenā¦
!
Most likely your parts donāt intersect / overlap nicely.
If you want someone to take a look, upload a Rhino file with the geometry your currently dealing with and the source geometry you used to create itā¦
i think the issue is the surface is just a plane, when I try to extrude the surface it only goes in one direction. how do i extrude the surface so its done from all sides? hope that makes sense.
If I understand correctly, you can do that with the offset command and the Solid option enabled.
amazing! i tried offset earlier but didnāt know about the solid. thank you so much! Iāll try the pattern nowā¦fingers crossed 
For the solid union, make sure the objects intersect clearly and donāt have coincident faces.
When it doesnāt work, post a file.
ok, so i tried my best, did the solidā¦but im still having a lot of issues. posting the file, i hope its something simple!
thank you
adviceback2.3dm (2.8 MB)
There are a few problems.
Your profile curve does not end on the axis of the revolution. This makes everything which follows difficult, because things just donāt really fit together.
I donāt know how you created the pipes.
I would use Sweep1 with a circle on both ends of one curve.
Looking at these curves, I think it might be better not to mirror the clockwise set for the boolean subtraction. The curves are almost coincident towards the bottom end of your object.
I split the curves at their intersection and created a tween for the near coincident part. Then I swept circles with their seams facing away from the object along the curves. I split the two main sweeps with a mirror plane, creating something like a wishbone shape. I split this wishbone shape with two lines describing the 14.4Ā° segment which is required for the 25 copies.
I arrayed the open polysurface 25 times and unioned everything.
For the horizontal pipes, Iād suggest sweep1 too. Use circles slightly larger than the other pipes. Letās say 0.51 mm radius instead of 0.5 mm. This is to avoid problems with the follwoing solid union.
If you do all this precisely, the result is a solid union.
closed.3dm (9.6 MB)
Martin- thank you so much. Iām going to try again from scratch using all these tips. Much appreciated, and thank you for sending the model.
