Threefold ring - tips on how to model this?


#1

I want to model this ring and what I thought is to draw some curves and extrude a shape along them, but believe this won’t really work. Is there any thing there that can help me achieve the model? How wouold you do it?
Thank you guys!


#2

You can try Helix command. You will need to adjust sub-command in helix.

Scale curves using Gumbal and/or using line option in CageEdit to make it look right.

Draw a rectangular and Sweep 1. Finally mirror?


#3

It looked delicious, so i´ve tried to cook it. Below is one possible recipe with example file:

Ingredients:

_Circle, _Extrude, _Spiral, _Pull, _Rotate, _Intersect, _Split, _Sweep1, _DupBorder

Preparation:

Step 1:

  • Draw a _Circle, _Extrude it to a cylinder with a height roughly the width of your ring

Step 2:

  • Create a _Spiral around your circle using the _AroundCurve option
  • Use 3 turns, the start and end radius should be smaller the hight of the cylinder

Step 3:

  • Now _Pull the spiral curve to the cyclinder
  • Make a copy rotation of the result by 40° and 80°
  • Why? … 3 Turns of a spiral means one turn covers 120° of the circle
  • So the magenta curve covers 40°, first copy covers 80° and last copy covers 120°
  • A full circle is covered by 360° which is 3x120°

Step 4:

  • Find the elevation points (green X) and their MID points (red) on the magenta curve
  • Draw alternating lines along the cylinders surface normals (long/short/long/short…)

Step 5:

  • Use _Sweep1, the rail is the projected magenta curve, the sections are the short/long lines
  • From the resulting sweep surface, extract the border curve (green) using _DupBorder
  • create a profile perpendicular to this curve and use Sweep1 to create one “fold” of the ring
  • Note that you will need to make this _Sweep1 using _RoadlikeTop option

Step 6:

  • _Rotate / Copy the resulting fold 2 times, using the increments of 40° and 80°

the result might be served with silver and diamonds, depending on your taste.

Threefold_Ring_CG.3dm (465.1 KB)

Bon appétit

c.


#4

This is how I go about knot work and weaving. celtic knot ring