[GDL] Can the REVOLVE command change the coordinates of points at the starting and ending sections?

[yongler]

Can the REVOLVE command change the coordinates of points at the starting and ending sections?

The GDL component in the figure below was generated using the REVOLVE command, and I want to make the elevation of a point in the starting and ending sections different. But I can't do it.

ang = 90
R1 = 1.5
tu_H= 0.25

pen  3
material  6

ROTy  90
REVOLVE  6, ang,   16+32 ,
		  0, R1 , 2,
		-1.2, R1 , 2,
		-1.2 , R1+ 0.2   , 2,
		-0.6 , R1+ 0.2+tu_H  , 2,
		 0 , R1+0.2,  2,
		 0, R1 , 2
DEL 1

[runxel]

No, REVOLVE does not allow for variable, altering curve profiles.

I also don't know how this geometrically would work. You would need something like Sweep2Rails from Rhino for crazy surfaces like this.

[yongler]

I imitated Grasshopper and created GDL's surface components, which can parameterize and control shapes. It looks great, written in pure GDL scripts. But I encountered trouble at the arc corner.

I hope GDL has a command similar to XFORM, where the geometry can be curled along an arc after this command.

[Funfun Yan]

How did you make the GDL's surface components?

[Toper Barrientos]

Shapes Generated from Polylines | GRAPHISOFT GDL Center

Hi all.

Kindly check/study these GDL commands.

For calculating angular velocity (curving vectors), check the curved rail topic fr the DNC's GDL cookbook 3 or 4.  Hope this helps. 🙂 .

[Toper Barrientos]

https://gdl.graphisoft.com/reference-guide/shapes-generated-from-polylines#TUBEA_gdlcommand

Also about tubes with diff. profiles fr . start & end points.