[Qgis-user] geometry generator - unexpected results

[David Fawcett]

I am trying to use a geometry generator to accomplish the "hand-drawn" line
style.

Some great recent examples by:

Klas Karlsson
https://twitter.com/klaskarlsson/status/1249333750451879937

Hamish:
https://polemic.nz/2019/11/18/foss4g-qgis-geometry-generators/

I am using the code below from the blog post by Hamish in QGIS 3.12:

make_line(
    array_foreach(
        generate_series(
            0, length($geometry), 100
        ),
        translate(
            line_interpolate_point($geometry, @element),
            rand(-10, 10),
            rand(-10, 10)
        )
    )
)

Here is an image of what the results look like:
https://github.com/fawcett/examples/blob/master/lines.png

The line geometries are in blue, and the geometry generator output is in black.

Can anyone suggest what is going wrong?

Thank you,

David.
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