[Therion] Point altitude/deph, Help !

[Philippe Vernant]

Thanks Tarquin, I will definitely have a look at your demo code.

Phil


> On 28 Jun 2022, at 11:32, Tarquin Wilton-Jones via Therion <therion at speleo.sk> wrote:
> 
> On 28/06/2022 10:04, Philippe Vernant wrote:
>> Hi guys,
>> 
>> I’m digging this topic since I’m running in a similar issue. Would that
>> be possible to have for the points with the option “altitude" something
>> like :
>> 640 [-30], where 640 would be the altitude and -30 the depth ?
> 
> You could use two different types of label, positioned at the same
> place, with one -align left and one -align right.
> 
> These are the existing labels:
> 
> altitude, date, height, label, passage-height, remark, stationname
> 
> altitude:
> 
> General altitude label. All altitudes are exported as a difference
> against grid Z origin (which is 0 by default). To display altitude on
> the passage wall, use altitude option for any line point of the passage
> wall.
> 
> So you set the grid origin to whatever height you want as the reference,
> and you get the depth shown by the labels.
> 
> height:
> 
> Height of formations inside of the passage (like pit etc.)
> 
> label:
> 
> generic label
> 
> passage-height:
> 
> Height of the passage (floor to ceiling)
> 
> remark:
> 
> general comment
> 
> Of those, you could maybe consider abusing height for your purpose. Put
> the altitude  as the height above sea level, and the "height" as the
> depth below the entrance.
> 
> Alternatively, you could consider creating a custom p_u_depth that does
> whatever kind of label you wanted. I have demo code for how to create
> labels in your own metapost:
> https://therion.speleo.sk/wiki/metapost#adding_custom_styled_labels_at_any_point_linepoint
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