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Lester,<br>
<br>
Just a small follow up. The normal vector can be input as a
'direction vector.' For example, for a plane at 45 degrees one can
input the direction vector (1,1,0), and ParaView will convert it
into a unit normal vector after you click APPLY. The (1,1,0) will
then appear as (0.707106781,0.707106781,0).<br>
<br>
Sam<br>
<br>
<div class="moz-cite-prefix">On 2/20/2015 4:03 AM, Lester Anderson
wrote:<br>
</div>
<blockquote
cite="mid:CAE3taFBuFVZR=ZzNaymw0Xr202CFrzynVCdZGD6Rn4hRG5g4Gw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>Worked out how to solve the problem:<br>
<br>
</div>
specifying the Normal for the clip plane in terms of the
cosine and sine function (X, Y) and now it is
straightforward to "slice" on specific longitudes for
example.<br>
<br>
</div>
It was not clear from the manual about this aspect and what
the numbers were.<br>
<br>
</div>
<div>So for 125 East :<br>
</div>
<div><br>
</div>
<div>Origin: 0, 0, 0<br>
</div>
<div>Normal: 0.819152044288992 (cos 35), 0.573576436351046
(sin 35), 0<br>
<br>
</div>
<div>125 West:<br>
<br>
<div>Origin: 0, 0, 0<br>
</div>
Normal: -0.819152044288992 (cos 35), 0.573576436351046 (sin
35), 0<br>
<br>
</div>
<div>Same options apply if you want to slice along latitudes
(or oblique views). <br>
</div>
<div><br>
</div>
<div>Clip plane plots exactly where it should on the map :)<br>
<br>
</div>
<div>Cheers<br>
</div>
</div>
<div>
<div>
<div>
<div><br>
<br>
</div>
</div>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 19 February 2015 at 09:14, Lester
Anderson <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:arctica1963@gmail.com" target="_blank">arctica1963@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
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<div>
<div>Hello,<br>
<br>
</div>
I have got a global dataset matrix and
projected this into spherical coordinates so
I could overlay a coastline file for
interpretation.<br>
<br>
</div>
I can tweak the clipping by manual dragging
but I was wondering what the best way is to do
precise clips/slices e.g. a clip at 125
degrees east or an oblique slice that goes
through know coordinates? I can see that the
method is to work out the plane position
(origin, normal), but not entirely clear on
what the values represent.<br>
<br>
</div>
<div>I have a clip plane defined as below: <br>
</div>
<div><br>
</div>
Origin: 372.352441878137 280.135672573806
-125.520109507155<br>
</div>
Normal: 0.771596619611773 0.580503076333685
-0.260105430490818<br>
<br>
</div>
<div>The origin I assume refers to the plane intself
in the spherical coordinates; are the normals in
radians?<br>
</div>
<div><br>
</div>
This would plot through NW Australia and northwards
through Timor on my data, but it would be useful to
generate a series of slices that were say 120, 125,
130 degrees etc with the clip plane oriented
perfectly normal to the sphere (if that sounds
right).<br>
<br>
</div>
Hopefully this is not a difficult one; still learning!<br>
<br>
</div>
Cheers<span class="HOEnZb"><font color="#888888"><br>
<br>
</font></span></div>
<span class="HOEnZb"><font color="#888888">Lester<br>
<div>
<div>
<div>
<div>
<div>
<div><br>
<br>
</div>
</div>
</div>
</div>
</div>
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</blockquote>
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