[Qgis-user] Geometry generator - reduce line

[Dario C]

I solved the second part (label) using geometries generator also in the
location of the label
using the same geometry of the line
make_line( start_point( $geometry), translate( centroid( $geometry),
$length/10, $length/10), end_point($geometry))

problem with REDUCE geometry still remains...


Il giorno gio 17 giu 2021 alle ore 15:52 Dario C <dario955i at gmail.com> ha
scritto:

> Hi,
> I'm trying to do an arc starting from a simple line.
>
> I'm using geometry generator with this code:
> make_line( start_point( $geometry), translate( centroid( $geometry),
> $length/10, $length/10), end_point($geometry))
>
> and it is working well.
>
> I'd like to have shorter line, so I started considering extend function
> with negative paramtere, but it does not work:
> extend(make_line( start_point( $geometry), translate( centroid(
> $geometry), $length/10, $length/10), end_point($geometry)),-100,-100)
> (with positive parameter extension works)
>
> I have serached in the geometry category but I didn't find anything
> similar to "reduce".
>
>
> Other question, related to the same geometry. I want to have the label
> curved and at the center of the arc and not of the line.
> I tried with the expression:
> translate( centroid( $geometry), $length/10, $length/10)
> in the "label anchor", but nothing happen :(
>
>
>   Any suggestion? Thank you!
>
>
> Cheers
>
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