Thanks Ken, sorry for the basic query On 11 August 2016 at 17:01, Moreland, Kenneth <kmo...@sandia.gov> wrote: > Lester, > > Once again, this problem can be solved with some basic geometry. Basically > you want to slice by a plane that goes through the origin (0, 0, 0) and the > two points defined by the 2 lat/lon coordiantes. Finding the plane that goes > through 3 non-collinear points is straightforward (in Cartesian space). > > The first step would be to convert your two lat/lon points to Cartesian > coordinate (X,Y,Z). > > Once you have that, you can define the slice plane by an origin point (0, 0, > 0 works just fine) and a normal (perpendicular) vector. The normal can be > computed by taking the cross product of the vectors going from the origin to > these two points. Just plug that into the normal for the slice plane and you > are good to go. > > If you need more information on finding the plane defined by three points, > there are many resources on the web to do so. Here is one descriptive video I > found with a simple Google search: > https://www.youtube.com/watch?v=0qYJfKG-3l8. There are many others. Most of > these instructions find the plane equation, but the plane equation is > constructed with the point and normal, which are all you need in ParaView. > > -Ken > > -----Original Message----- > From: Lester Anderson [mailto:arctica1...@gmail.com] > Sent: Tuesday, August 9, 2016 1:39 AM > To: Moreland, Kenneth <kmo...@sandia.gov> > Cc: paraview@paraview.org > Subject: [EXTERNAL] Re: [Paraview] Slicing a sphere based on longitudes and > latitudes > > Hi Ken, > > Thanks for the info, that all worked fine. Sorry bit of a late response. > > On a similar theme, is it easy to make a great circle slice (with the origin > at 000) that plots through two long-lat points? I'm guessing that this > scenario would be a rotation about x, y and z ? > > Thanks > Lester _______________________________________________ Powered by www.kitware.com
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