== VisIt tutorial for SoHPC@EPCC ==
[[Image(ex1.png,right)]]
Prepare PATH environment by typing:
{{{
#!sh
export PATH=/opt/visit-2.6.2/bin:${PATH}
}}}


== Contours of a scalar variable ==

 1. Open VisIt and `noise.silo` with a single command or use File -> Open
{{{
#!sh
visit -o /opt/visit-2.6.2/data/noise.silo
}}}
 1. Type `Ctrl+I` to display info about the data opened and then close the window
 1. Click Add -> Contour -> hardyglobal
 1. Click Draw
 1. Double click on Contour (or Right-click ->Edit plot description)
 1. Under select by choose ->N Levels enter 5
 1. Change the opacity levels
 1. Click Apply
 1. Click Dismiss
 1. Click Delete


== Pseudocolor and Isosurfaces for a scalar variable ==

 1. Click Add -> Pseudocolor -> hardyglobal
 1. Click Draw
 1. Click Operator -> Slicing -> Isosurface
 1. Click Draw
 1. Click Arrow to expand
 1. Double-Click Isosurface
 1. Under `Select by` choose ->Percent(s) enter 40
 1. Click Apply
We will add additional isosurface at 80%
 1. Double-Click -> Pseudocolor
 1. Change Opacity
 1. Click Apply & Dismiss
 1. Click Add -> Pseudocolor -> hardyglobal
 1. Click Operator -> Slicing -> Isosurface
 1. Click Arrow to expand
 1. Double-Click Isosurface
 1. Disable `Apply operators to all plots` on GUI window
 1. Under `Select by` choose ->Percent(s) enter 80
 1. Click Apply -> Dismiss -> Draw
[[Image(ex2.png)]]

== Clip Isosurfaces ==
 1. Click and enable -> apply operators and selection to all plots
 1. Click Operators -> Selection -> Clip
 1. Click Draw
 1. Double-Click -> Clip
 1. Click Plane 2
 1. Click Apply & Dismiss
 1. Click x (to delete)
 1. Click Draw

== Slice Isosurfaces ==
 1. Click Operators -> Slicing -> Slice
 1. Click Draw
 1. Double-Click -> Slice
 1. Click Z-Axis & Project to 2D
 1. Click Apply
 1. Click Dismiss