L-System Doesn't Allow for More Than One Rule

[Romaji Milton Amulo]

If I make an axiom in L-System, that is one character, and try to add a second rule, the pattern is replaced by one segment upwards, and goes back to correct behavior if the second rule is deleted.

This occurs on a fresh instal, if the L system was changed from default

Inkscape 0.92.3 (2405546, 2018-03-11) (64 bit)[Both Windows Store version and MSI]
On Windows 10 Home 64 bit 1083

[Alvin Penner (apenner)]

could you provide detailed steps to reproduce?

[Romaji Milton Amulo (nxt101)]

Made a new install of Inkscape, then go open L-Systems.
Replace the default axiom with A. Change the left and right angles to 90
degrees.
Write in the rules "A=B[+A][-A]" and turn on live preview
Then, add "B=BB" and the tree should become a single segment

On Mon, Oct 22, 2018, 05:35 Alvin Penner <email address hidden> wrote:

> could you provide detailed steps to reproduce?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1799015
>
> Title:
> L-System Doesn't Allow for More Than One Rule
>
> Status in Inkscape:
> New
>
> Bug description:
> If I make an axiom in L-System, that is one character, and try to add
> a second rule, the pattern is replaced by one segment upwards, and
> goes back to correct behavior if the second rule is deleted.
>
> This occurs on a fresh instal, if the L system was changed from
> default
>
> Inkscape 0.92.3 (2405546, 2018-03-11) (64 bit)[Both Windows Store
> version and MSI]
> On Windows 10 Home 64 bit 1083
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/inkscape/+bug/1799015/+subscriptions
>

[Alvin Penner (apenner)]

thanks for the info.
unfortunately, I do not know enough about Lindenmayer to be able to judge what the correct behavior is, will have to wait for someone else to comment.

[Romaji Milton Amulo (nxt101)]

It is supposed to make a tree shape, with the branches coming off half the
length of the one they branched off from

On Mon, Oct 22, 2018, 09:20 Alvin Penner <email address hidden> wrote:

> thanks for the info.
> unfortunately, I do not know enough about Lindenmayer to be able to judge
> what the correct behavior is, will have to wait for someone else to comment.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1799015
>
> Title:
> L-System Doesn't Allow for More Than One Rule
>
> Status in Inkscape:
> New
>
> Bug description:
> If I make an axiom in L-System, that is one character, and try to add
> a second rule, the pattern is replaced by one segment upwards, and
> goes back to correct behavior if the second rule is deleted.
>
> This occurs on a fresh instal, if the L system was changed from
> default
>
> Inkscape 0.92.3 (2405546, 2018-03-11) (64 bit)[Both Windows Store
> version and MSI]
> On Windows 10 Home 64 bit 1083
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/inkscape/+bug/1799015/+subscriptions
>

[Jonathan Hofinger (jhofinger)]

Hi Romaji, this is possible by separating the rules with a semicolon (i.e. "A=B[+A][-A];B=BB").