I want to make something like this with a command like Tube that goes to Path instead of prism.

[LeeJaeYoung]

I want to make something like this with a command like Tube that goes to Path instead of prism. Which commands should I study?

[AllanP]

the tube command

TUBE    number_of_profile_nodes,   Number_of_path_nodes,   Mask,

             (Coordinates_of_profile  x,y,status)

             (Coordinates_of_path    x,y,z,angle)

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

Remember

for the path the 1st Coordinate is invisible, the shape starts on the second,

and

the last Coordinates of the path is invisible, the shape ends on the second to last,

so

you require at least 4 path points for a shape.

or sweep

or tube a with scaling

[LeeJaeYoung]

I saw this too.

1. The rest of Sweep and Tube A seem to be a bit misunderstood.
I'll try to study more.
But is this a one time thing?
Or does this also mean connecting with multiple commands?

[LeeJaeYoung]

1. Tube is known to be one path.
Are you saying to make it using multiple duves?

Is it possible to change the upper part of the tube as it goes?
I am asking except for Prisms drawn from the side.

[LeeJaeYoung]

I would like to know why this part is like this.

TUBEA 2, 4, 1 + 2 + 16 + 32,
0, 1.5, 0,
-1, 1.5, 0,

......

TUBEA 3, 4, 1 + 2 + 16 + 32,
0, 0, 0,
0, 1.5, 0,
-1, 1.5, 0,

....

TUBEA 2, 4, 1 + 2 + 16 + 32,
0, 0, 0,
-1, 1.5, 0,

.......

TUBEA 3, 4, 1 + 2 + 16 + 32,
0, 0, 0,
1, 0, 0,
1, 1.5, 0,

.....

TUBEA 2, 4, 1 + 2 + 16 + 32,
0, 1.5, 0,
1, 1.5, 0,

....

Is the y value of uv non-negative?
This is very different from what I have known.

So I couldn't help but change the height of the upper part of the story with TubeA, and the lower part of the story had to be treated as a tube and processed with addgroup.
tubeA was used for a wall whose height changes, and tube had to be used for a stem base hidden in the story.

[Peter Baksa]

Hi,

yes, w (y) of the cross-section has to be > 0.

GDL shapes use local coordinates, you can transform the base of tubea to a different height.