Did SVG import or Linear Extrude get broken or change?

[William Adams]

Tried to do this with the code:

$fn = 180;

linear_extrude(height = 500, center = false, convexity = 10)
import(file = "hi_lo.svg", center = true, dpi = 96);

using the attached file, but it would not generate in OpenPythonSCAD (then I updated and it quit working, see the Github issue)

It works as expected in OpenSCAD:

William

[William Adams]

For the record, this still happens in 0.8.14

PythonSCAD 0.8.14 

https://www.pythonscad.org/
 

Copyright (C) 2009-2026 The OpenSCAD Developers

Copyright (C) 2024-2026 The PythonSCAD Developers

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 

Parsing design (AST generation)...

Compiling design (CSG Tree generation)...

Rendering Polygon Mesh using Manifold...

Geometries in cache: 2

Geometry cache size in bytes: 940600

CGAL Polyhedrons in cache: 0

CGAL cache size in bytes: 0

Total rendering time: 0:00:00.088

Top level object is a 3D object (PolySet):

Convex: no

Triangles: 18064

Rendering finished.

[Guenther Sohler]

Hi William,

The SVG File defines shapes with fill=none, which maps to transparent shapes.

Once you extrude them you see transparent/invisible solids.

PythonSCAD has this behaviour, since it can render colored 2D shapes which are not only cyan.

Feel free to re-color red to see it.

> It works as expected in OpenSCAD:

In that case I would rather say: it works as expected in PythonSCAD

Let me know if coloring your code  yields the correct result :)

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[William Adams]

Where to add that to:

$fn = 180;

linear_extrude(height = 500, center = false, convexity = 10)
import(file = "hi_lo.svg", center = true, dpi = 96);

William

[Guenther Sohler]

Hi William, i think any place is fine

e.g.

color("red")

linear_extrude(height = 500, center = false, convexity = 10)
import(file = "hi_lo.svg", center = true, dpi = 96);

You are using SCAD syntax only for direct comparison, right ?

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[William Adams]

No, I was working in OpenSCAD code in OpenPythonSCAD when the above wasn't working.

Here's the SVG.

The weird thing is, adding that to the .scad file 

$fn = 180;

color("red");
linear_extrude(height = 500, center = false, convexity = 10)
import(file = "hi_lo.svg", center = true, dpi = 96);

claimed to have worked:

but I'm not seeing a visible result when I "View All":

Thoughts?

William

[Guenther Sohler]

yes of course

you put the color() statement to correct place, but you put an extra ';'  character, which makes color shoot nowhere ...

Please remove the ';'  character and tell me if your result improves ...

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[William Adams]

OIC.

Scoping issue. 

Thanks!

William

[William Adams]

Would it make sense to add 

     color("goldenrod");

or something along those lines at the end of the openscad.py import file?

William