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<div class="moz-cite-prefix">Just a thought Richard, but if you
don't need to edit the data, could you not use a join to add a
(precalculated) rotation field on the fly, either on the DB side,
or in QGIS?<br>
<br>
Cheers,<br>
<br>
Andy<br>
<br>
On 23/07/2015 09:10, Richard McDonnell wrote:<br>
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Hi,<br>
I am in need of some guidance, I am trying to create an "active
hatch/Fill" as part of a style im working on. What I want is for a
hatch to rotate depending on the orientation of a Polygon.<br>
For example, here is the same entity rotated, with the hatch
rotating.<br>
<br>
<img src="cid:part1.04070708.06040802@geodata.soton.ac.uk" alt=""
height="386" width="210"><br>
The issue is I am working on a database, onto which I cant add any
data (additional columns) to the tables, I would like to do this
from within the styling.<br>
You can use an expression to denote the angle, so I was hoping to
do it that way.<br>
I was looking to utilize the geometry of a bounding box, and
calculate the angle of the diagonal, using something like<br>
<br>
180*atan((ymax - ymin)/(xmax - xmin))/$pi + 90<br>
<br>
But I am not having any luck....If there is no way at present to
do this, Might I put it forward as a possible new feature?<br>
<br>
Regards,<br>
<br>
Richard.<br>
<br>
<br>
<br>
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<pre class="moz-signature" cols="72">--
Andy Harfoot
GeoData Institute
University of Southampton
Southampton
SO17 1BJ
Tel: +44 (0)23 8059 2719
Fax: +44 (0)23 8059 2849
<a class="moz-txt-link-abbreviated" href="http://www.geodata.soton.ac.uk">www.geodata.soton.ac.uk</a>
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