[Therion] symbol-show fixed points

[Bruce]

Thanks Stacho

I think you are pointing me in the direction of answering my second
question; redefinition of each type of point that I might be interested in.
ie p_sink, p_doline, p_entrance.  

(Admittedly I have not delved into the code to see how it currently works,
and I should perhaps educate myself some more before asking.)

 

Some of my points would have all three (or more) flags set (sink, doline,
entrance).  Are they just layered one above the other in the output? So
there may be three copies of the (identical) text layered one above the
other if each definition included printing of the text?  When I have time I
can look into the TMPDIR outputs and perhaps figure it out.

 

Anyway I digress.  My most pressing need and interest is (the first question
in my original post) adding the text output to fixed points that do not have
any other flags set.  The ones that show up in Loch as red circles that do
not have doline or other flag set, but do not show up with labels included
in the pdf output.  Is there a p_fixed?

 

Thanks

Bruce

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From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
Of Stacho Mudrak
Sent: Thursday, 10 February 2011 10:48 p.m.
To: List for Therion users
Subject: Re: [Therion] symbol-show fixed points

 

Well, it is quite complicated, but it is possible. When point symbol is
exported from centerline, system _text attribute is set in metapost. To
dipsplay label, use code 

code metapost


  def p_continuation(expr pos,theta,sc,al) =







etc...
shown in:

http://therion.speleo.sk/samples.doc/60.html

But you will need to redefine corresponding symbol (e.g. p_sink). In that
code, you can also control, whether symbol and/or text should be displayed.
Feel free to ask more, if this does not help you.

Regards, S.

On 7 February 2011 21:10, Bruce <dangle at tomo.co.nz> wrote:

Hi All

I've been trying to understand symbol-show and symbol-hide a little better
as they relate to pdf outputs.  How do I display the text associated with
fixed points?

 I have some map objects defined for various caves in a large system.  These
are comprised of scrap drawings.

  I also have a map object with the minor surface features nearby, such as
sinks, dolines, isolated entrances and significant navigational features
such as fence posts or trees (for example). This is comprised of a survey
only (mostly fixed points, and no scrap drawings) however and uses flags
such as doline or sink, and most points have a text string associated ie.

 fix 15 2521640   6042938            581       10 10 30 

station 15 "Concrete water trough"

 I would like to show the caves as outlines with all the rest of their
symbology turned off, and the surface features with each of the points
labelled with appropriate symbol and associated text.  This is for an area
map, at scales of say 1:5000 or 1:10,000

I can turn the cave symbols off with symbol-hide statements, and so far I
think that is working out OK.

 However.

             -layout-symbol-show point flag:entrance \

            -layout-symbol-show point flag:sink \       

            -layout-symbol-show point flag:spring \     

            -layout-symbol-show point flag:doline \     

            -layout-symbol-show point flag:dig \         

The above layout statements cause the special entrance and sink etc symbols
to be displayed, AND show the text string associated with the point.  These
are not displayed by default as far as I can tell, but these statements
rectify that.

        -layout-symbol-show group all

And the group all statement has pretty much the same effect in a more
comprehensive and compact format.

 However none of the above enables me to display the text for my "Concrete
water trough" example above.

It is always just a cross with no text, or with '15' if debug station-names
is on.  It shows up in Loch, but not in pdfs.

 So, how do I display the text associated with fixed points?

Is there a need for.

            -layout-symbol-show point fixed 

. or something similar?

 Also, sometimes I would like to display the point symbols (for the likes of
the above flags) OR the text strings associated with the points, but not
both at once.  Is there a way of doing this? 

 Thanks

Bruce

 

 

 

 


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