Thankyou Psygorn.

I'll check out the 7-leafer.

As for the 10*PI circumference at 60 degrees, it is simply because Cos(60degrees) = 1/2.
( Basic triangle characteristics, and/or basic trigonometry. )
ArcLength of latitude circle = ( 2 * PI * circle radius ) = ( 2 * PI * Cos( 6Odegrees) * Sphere Radius ).
Note that formulas vary depending upon use of degrees versus radians.

I relatively quickly used MoI to test every few degrees between 32d and 61d, for convergence of North pole arclength * 6 versus latitude radius. 60 degrees is not practical. I'll stay down around 30d +/-, and abandon fixed hinge pins for greater than 5 leaves.

Shell of leaf looked cool. Had to Flip surface normal.

Best method to create spherecap?
Choices include sphere trim or boolean with plane or line,
There can be some artifact surface(s).
Or revolve of North pole arc to latitude point.

Looking forward to release of your design.

- Brian

The 7 leaf orbox is mighty fancy!

Hi Brian,

The pivot point or anchor point for the leaves are located outside of the circumference of the leaves for the 6-leaf design (that's the trick I think).

>I'll check out the 7-leafer.

Do check that out as well. However, I think the movement of leaves for that design are limited (meaning the leaves do not rotate large degrees! and by large I mean more than 50 degrees this had caused the box to have small opening mouth when it is in it's open state, so, you can only fit objects that can pass through it's small mouth. I believe the 6-leaf design has a wider mouth in it's open state meaning it can swallow objects with larger diameters!)

>Looking forward to release of your design.

6-leaf design already released! (in STL Format) :-)

Check out here:

https://sketchfab.com/3d-models/6-leaf-iris-dome-box-a67fb51c99db4b359668996dfcdffa32
and here:
https://www.thingiverse.com/thing:6145744

There are intentions to release the original MOI file as well but for that you have to wait (a bit)

And there is an issue that might be interesting for you/others. if you like to know about it I can share it with you :-)

> The 7 leaf orbox is mighty fancy!
Indeed it is :-)

- Psygorn

Hi Psygorn
These designs are so interesting, especially the box with 7 leaves. I wish I could understand the math behind it! :)
This is the tutorial I studied to get the process of making it.
https://eleccelerator.com/3d-printed-mechanical-iris-dome-all-one-piece/

After several trial and error, I managed to make these nodes. (Attached)
The anchor point for the first node is on the corner of the leaf. (According to the tutorial. Max 6 leaves)

I played a bit with different anchor point positions on next 3 nodes.
In these nodes, leaf number can be set to a higher number, But I'm guessing they are not 3d print friendly?
I think moving the anchor point to the outside of the leaf is the key to have more leaves,
But where is the most efficient position for anchor point?

Hi MO (MO_TE),

Wooow! I am stunned by your nodes! :-) (I need time to study them carefully though!)

> This is the tutorial I studied to get the process of making it.
https://eleccelerator.com/3d-printed-mechanical-iris-dome-all-one-piece/

Yes, it seems it is the most robust tutorial on making Iris Dome Boxes out there (and it was mentioned by Brian here: https://moi3d.com/forum/index.php?webtag=MOI&msg=10641.6) , However, I did not study it (I think I should study it
at some point)

> In these nodes, leaf number can be set to a higher number, But I'm guessing they are not 3d print friendly?

Is it possible to rotate the leaves using your nodes? (I did not study your nodes carefully as of yet!) if the leaves do not bump into each other then surely u can make it 3D-printable! According to my personal experience the most two important things for making an Iris Dome Box are: 1- determining the shape of the leaves 2- determining the Anchor point around which a leaf can rotate without bumping into other leaves! the rest is easy!

Once again u showed how powerful Nodes are! and what crazy things one can do with Nodes + conventional modeling! Thank u (and of course Max) for that.

> I think moving the anchor point to the outside of the leaf is the key to have more leaves,

Indeed this trick is used to make the 6-leaf IDB (Iris Dome Box). ;-)

> But where is the most efficient position for anchor point?

Sorry, I don't have the answer for this question as of yet!

-Psygorn

>> Is it possible to rotate the leaves using your nodes?
Yes, Change the "Aperture" value. Also, use the other blue nodes as well. E.g "Leaves", "Height"

Hi MO,

I did use Aperture but it seems the leaves are rotated around the center, I mean they are not rotated around a pivot point on the lateral side of the sphere! ( I hope this explanation is good)

However, the way leaves rotate using your nodes is another type of movement which is interesting in its own rights! :-) And I can tell u it is possible to make a 3D printable design with such movement.

- Psygorn

Hi
>> it seems the leaves are rotated around the center
I guess you are using the "Iris_Box_3" node. I used the center point as anchor point there.

But you can see the anchor point in other nodes shown by a little cylinder.

>> it is possible to make a 3D printable design with such movement.
Cool! :)
It can handle up to 60 leaves!

Hi,

> But you can see the anchor point in other nodes shown by a little cylinder.

Yes, I saw it. :-) in "Iris_Box_4 node" it seems it works fine! (Or at least I am sure with your Nodes one can make as many Iris_Dome_Box designs as he/she wants) great job! :-)

>It can handle up to 60 leaves!

Let's make that one! :D

- Psygorn

>> Let's make that one! :D

35 Leaves :)

Isn't it satisfying?

:-)