Fillet diagrid angles

Hello there,
I’m still a beginner at grasshopper, would be very thankful if yo help me.

I’m trying to make a Diagrid structure, with filleted Angles Like this in the picture

as you see the angles is rounded,

I got to the level of constructing the axis of the diagrid,

can u help me please

You could use Lunchbox plugin.

Diagrid (10.9 KB)