On 19/02/2025 15:58, Bill Gee wrote:
I would also like a way to produce a map which has SOME (not all) cross-
sections. Right now it is all or nothing. You either get every cross-
section or you get no cross-sections. This might be done by using PDF
layers and letting the cross-section scrap specify the layer it goes on.
You can sort of do this with
-attr <name> <value>. <name>
Then use this in metapost
p36 thbook
You can test presence of such a variable using if known ATTR_<name>: ... fi.
However, my metapost was not good enough and I kept getting bugs. So I
used python to pull them out, then removed the ones I wanted. I thought
I had put the code online, but cannot find it!
However, the use of attr would work better if symbol-hide worked for it.
Unfortunately I do not think that it does.
You could abuse the system by abusing the -context option and setting it
to a symbol you do not use then turn that off with symbol-hide.
Andrew
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