Hi All,

I'd like to create a 3 dimensional plate with a spiral design similar to this:



I started off using a flat spiral curve but notice that the original is tighter in the centre and gradually widens out. Is there a way to adjust the flat spiral curve?



Once, that spiral is sorted, how would I go about creating the variable depth of the relief?

Many thanks in advance!
Gunter

Just use the "Edit Frame" ?

Hi Gunter, there are a variety of different spiral scripts here:
https://moi3d.com/forum/index.php?webtag=MOI&msg=7356.2

I think several of those will do variable distance instead of fixed distance like the regular command has.

- Michael

Hi Gunter, Brian's script here seems pretty close:
https://moi3d.com/forum/index.php?webtag=MOI&msg=6951.30





- Michael

Hi Gunter,

re:
> Once, that spiral is sorted, how would I go about creating the variable depth of the relief?

So one possibility for the variable depth of the relief could come from doing a sweep
with profile curves that have a peak and dropoff shape to them.

Something like this, the profiles point upwards in Z and it would be good to make a profile station
for every spiral turn that get smaller so that the sweep won't bunch up on top of itself:



Then select the profile curves, and run Construct > Sweep and pick the spiral as the rail to generate this:



Draw in some lines and trim the spiral so you can form this planar region:



Select those curves and run Construct > Planar to fill that area in:



These can now be joined:



Looks like this:



- Michael

Michael, this is so helpful, thank you SO much!