[Therion] Extended elevations - development snapshot (commit 6860f82)

[Stacho Mudrak]

Hi Bruce, thanks a lot for your feedback.

I have added logging of extend ratio, when it is not 100%. Also I hope, I
have enabled specification of ratio for given station/shot:

extend <ratio> <from> <to>
extend <ratio> <station>

Allowing the form extend [left <ratio>] would be much more parsing. I have
also changed the allowed range to 0 - 200%.

Extend ratios are applied to spays also - but in this case - extend ratio
of nearest shot is taken for splay. I think, this way it is OK.

Could you please check whether it is working now as expected (commit c7d41d9
<https://github.com/therion/therion/commit/c7d41d96ebc47a652243711489813635e58c64d3>
<https://github.com/therion/therion/commit/c7d41d96ebc47a652243711489813635e58c64d3>
)?

Thanks, S.







On Wed, 12 Aug 2020 at 12:25, Bruce Mutton <bruce at tomo.co.nz> wrote:

> And it looks like the extend ratio is not reported when ‘log extend’ is
> set.
>
> It would be nice to have that if it is possible.
>
> Bruce
>
>
>
> *From:* Therion <therion-bounces at speleo.sk> *On Behalf Of *Bruce Mutton
> *Sent:* Wednesday, 12 August 2020 22:18
> *To:* 'List for Therion users' <therion at speleo.sk>
> *Subject:* [Therion] Extended elevations - development snapshot (commit
> 6860f82)
>
>
>
> Stacho
>
> > there is a possibility to specify reduction ratio for extended elevation
> (0 = vertical, 100 = normal left/right) - just use "extend <number>"
>
>
>
> I have made this work, by placing ‘extend <number>’ statements in-line
> with the survey data, but that seems to be the only way it will work.
> Every combination I could think of with the extend controls in a separate
> centreline or block results in an error.
>
>
>
> For an example I have managed to make this extended centreline…
>
>
>
>
>
> …into this by using strategically placed ‘extend 50’, ‘extend 100’, and
> ‘extend 75’, as well as an ‘extend vertical’.  It now matches more closely
> what one would expect by looking at the plan view.
>
>
>
>
>
> So it works very well, but the difficulty I have is that to make the
> extended elevation control manageable, it needs to be separated out (in one
> place) from the survey data, but now any control of the extend ratio must
> be in-line with the data.  This makes it very confusing and difficult to
> manage.
>
>
>
> Is there any chance that the ratio could be controlled by statements in
> separate centrelines, as with left/right/vertical etc?
>
>
>
> Maybe by allowing the form ‘extend [left <ratio>] <station1> <station2>’
> as an equivalent to the in-line statements ‘extend <ratio>’ and then
> ‘extend left’?
>
> (I am thinking of similar syntax to ‘export map -projection [elevation 290
> deg]’ where the square brackets are required if the default is not what is
> wanted).
>
>
>
>
>
> The extend ratios are applied to splays as well as to legs, which is
> usually desirable, except sometimes where the ratio approaches zero.  If
> the user is to control splay ratios separately to the legs, then I guess
> the only option is to put the extend ratio statements in-line.
>
>
>
> And one more thing.  The range is limited from 0 to 100%.  If we are going
> to allow distortion of the extended elevation, then I think the upper limit
> should be something like 150% or 200%.
>
>
>
> Bruce
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> https://mailman.speleo.sk/listinfo/therion
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20200812/f85da698/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 109111 bytes
Desc: not available
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20200812/f85da698/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 100011 bytes
Desc: not available
URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20200812/f85da698/attachment-0001.png>