[Therion] Custom map connections

[Philippe Vernant]

Hi Tarquin,

Can’t you just define some map in grey and some in colors depending on the scrap and the connection ?

Cheers,
Phil


> On 7 Jul 2022, at 19:03, Tarquin Wilton-Jones via Therion <therion at speleo.sk> wrote:
> 
> Hi folks,
> 
> I have a challenge, presented to me by some users of one of our surveys.
> 
> We have a cave with layers horribly stacked above each other (10
> passages all crossing the same point!). Simple solution; use map offsets
> to put them all side by side. Use map connection arrows to show what
> connects to what.
> 
> That's all good, but they find the default connection arrow hard to see.
> I can redefine l_mapconnection to create my own arrows. Great!
> 
> But here's the challenge; they want us to show the difference between an
> unimportant connection, and a major "follow this route" connection. Eg.
> minor ones in grey, major route in red.
> 
> I have tried everything I can think of with the mapconnection point: id,
> scale, rotation, -attr etc., but Therion is not creating a
> p_mapconnection. it creates a l_mapconnection, and passes it a path to
> create the line. The attributes are all completely ignored.
> 
> Normally, I would use "-attr type major", but that cannot work here,
> because Therion just ignores it. In my opinion, this is a limitation
> that should be fixed.
> 
> The only solution I can think of, is to put *two* mapconnection points.
> The l_mapconnection code can then see if the current path matches the
> previous path, and if so, draw it in red. But this is such a horrible
> hack, and prone to failure in future if someone does not realise why
> there are two points, and why they have to follow on from each other.
> 
> Can anyone think of a better workaround?
> 
> Cheers,
> 
> Tarquin
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