Editing Slerpy (section)

==Important concepts==
 
The main function of slerpy is to record a series of pymol views. A movie can then be created by interpolating between these views. A pymol view consists mostly of the camera orientation (that is, the orientation of the viewers eye with respect to the molecule). It also includes information about the clipping planes.
 
It is important to realize that most slerpy commands act on the "current" view. You can navigate among views by using the sn, sp, and sgo commands. If you've changed the view around with the mouse or you just want to know the number of the current view you can get back to the current view with the sc command.
 
Pymol views do not contain information about how pymol objects and selections are displayed. If you just want to create a movie which moves around a single representation of a molecule then all you need to do is record the set of views that define the tour of the molecule.
 
If, on the other hand, you want to change the representation or change which items are displayed you will need to add actions to some of your views. An action is any set of pymol commands. Actions can be associated with any view in the series recorded by slerpy. The ''sscene'' command inserts a new view and simultaneously creates a pymol scene and the action to display it. The scene will include all of the objects and representations visible at the time the command was issued.
 
In order to control the rate of motion between the defined views in a slerpy movie, you can control the number of frames used in each interpolation. When a view is saved in slerpy it is associated by default with a transition of 50 frames to the next view. The number of frames in the transition can be altered with the ''ssetf'' command in slerpy.
 
The views and actions stored by slerpy can (and should) be saved to a key file with the ''swrite'' command. They can then be retrieved with the sread command.  Note that swrite saves the current pymol state in a .pse file but sread does not read in the .pse file.  If you're starting a new pymol session to continue work on an existing movie you should load the pse file before doing an sread.