Plotting duplicated annotated line produces corrupt PS

[joa-quim]

From forum post

data t.dat

> -L-100 -Sqd1.0i
-86.45235040920656 44.56074532391791
-87.15496366731526 44.63460538965384
-87.52203359612746 43.70375243465723
-87.57565650687522 42.81267315180862
-87.46872284091027 42.21696862267483
-87.29959207789203 41.98325754479477
-86.88164979096022 41.9742639278875
-86.56233691428744 42.29261909586023
-86.46591956240054 42.8760163962448
-86.67090781901327 43.41777121767043
-86.7207951116628 43.91664988596499
-86.45235040920656 44.56074532391791
> -L-100 -Sqd1.0i
-86.45235040920656 44.56074532391791
-87.15496366731526 44.63460538965384
-87.52203359612746 43.70375243465723
-87.57565650687522 42.81267315180862
-87.46872284091027 42.21696862267483
-87.29959207789203 41.98325754479477
-86.88164979096022 41.9742639278875
-86.56233691428744 42.29261909586023
-86.46591956240054 42.8760163962448
-86.67090781901327 43.41777121767043
-86.7207951116628 43.91664988596499
-86.45235040920656 44.56074532391791

command

gmt psxy t.dat -R-88.50/41.45/-84.56/46.23r -Jt-86.3855/1:2175000 -P -W0.50p,black -Sqd1.0i:+d+Lh > lixo.ps

Removing the duplicated segment makes it plot correctly.

[PaulWessel]

Related to the segment header. Removing them and I get a plot with duplicated lines. There may be some restrictions on what changes to -Sq can be done via segment headers. WIll have to see in debug what actually happens to give me a SEGV.

[joa-quim]

Dumb VS2019 no longer systematically crashes in those case, which was extremely useful for it would lead directly to the crashing point.

[PaulWessel]

Scary that we must rely on Apple clang...

[joa-quim]

Yep, have to resort to Julia to when want to make use of that facility.

[PaulWessel]

Just thinking out aloud how -S in command line and segment header should work (I am not saying it works this way, but perhaps that is should):

1. If no -S is given on the command line then any -S in a segment header is completely ignored (you are basically selecting line or polygon mode).
2. If an unspecified symbol is given on the command line (-S) then the -S in a segment header is fully parsed.
3. If a complete -S is given on the command line then any -S in a segment header should be ignored.

I am not sure about the third, but there should be a way to have either the command line (full syntax) or the segment header (-S) be in effect, no? We usually let command line options override defaults, and I guess in this context, settings in the segment header constitute defaults (?).

[stale]

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