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<p>Do the zone origins have non-zero values? If all of the zone
origins are (0,0,0) then relative is essentially the same as
world. If the zone origins have values, then the world coordinate
of any point is the relative coordinate plus the zone origin
coordinates. For example, if Zone 1 origin is (0,10,15) and one of
the facade corners in relative coordinates is (10,10,0), then the
same point in world coordinates would be (10,20,15).<br>
</p>
<p>Are the facades aligned with the cardinal directions, or are they
skewed? If they are aligned, then you can easily add (or
subtract) 30ft from each of the facade corners to set your shading
surface coordinates. If it is skewed, then you will have to do
some trigonometry to figure out the x and y offsets.<br>
</p>
<p>IDF Editor will not alter any coordinates automatically when
switching between relative and world.</p>
<p>I don't know if any programs will convert from one to the other,
but most tools that can import EnergyPlus idf files will accept
either relative or world and convert it to the standard method
used in the interface.<br>
</p>
<p>Mike<br>
</p>
<br>
<div class="moz-cite-prefix">On 5/18/2018 1:03 PM, Eva Skorupka via
Bldg-sim wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CA+YnifBSO18rQUX4CzfbP5-KJVXzhBky6V7C_PRrt6cwg-zH9Q@mail.gmail.com">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>We are working on an Energy Plus model which is currently
modeled with relative coordinates and we'd like to add in site
shading on each facade (East, West, North, South) that is the
same width and height of each facade, but 30 ft away.</div>
<div><br>
</div>
<div>How should the site shading be placed in world coordinates
in order for it to be consistent with its exterior wall which
is referenced in relative coordinates?</div>
<div><br>
</div>
<div>Also, if coordinates on the IDF editor are switched from
relative to world, does this automatically update the
coordinates in the model, or would that have to manually be
done? Does anyone know of a program that does that for you?</div>
<div><br>
</div>
<div>Thanks in advance.</div>
<div><br>
</div>
</div>
<br>
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