View Change Render 1.1
-----------------------

REQUIREMENTS: VMD Version 1.8.6 or newer 

DESCRIPTION:
        script to save current viewpoints and animate
        a smooth 'camera move' between them,
        rendering each frame to a numbered .rgb file
        (Can also do the 'camera moves' without writing files.)

PROCEDURES:

        save_vp         - save current viewpoint
        retrieve_vp     - change  current viewpoint  to a saved one
        move_vp         - smoothly move between saved viewpoints 
        move_vp_render  - smoothly move between saved viewpoints and render
        write_vps       - write viewpoints to a disk file (read back in via 'source')

USAGE:
 In the vmd console type this to save your viewpoint:
       save_vp 1

 to retrieve that viewpoint  (You can replace '1' with an integer < 10000)
       retrieve_vp 1

 After you've saved more than 1 viewpoint
       move_vp_render 1 8 200 /tmp myMove 25 smooth
 will move from viewpoint 1 to viewpoint 8 smoothly, recording 25 frames
 to /tmp/myMove####.rgb, with #### ranging from 0200 -- 0224.

       move_vp 1 43
 will retrieve viewpoint 1 then smoothly move to viewpoint 43.
 (move_vp does not render .rgb files, move_vp_render does)
  Note warning above.  Extreme moves that cause obvious protein distortion
 can be done in two or three steps.

 To specify animation frames used, use
       move_vp 1 43 200
 will move from viewpoint 1 to 43 in 200 steps.  If this is not specified, a
 default 50 frames is used

 To specify smooth/jerky accelaration, use
       move_vp 1 43 200 smooth
       move_vp_render 1 8 200 /tmp myMove 25 smooth
    or
       move_vp 1 43 200 sharp
       move_vp_render 1 8 200 /tmp myMove 25 sharp

 the 'smooth' option accelerates and deccelrates the transformation
 the 'sharp' option gives constant velocity

 To write viewpoints to a file,
       write_vps my_vp_file.tcl

 viewpoints with integer numbers 0-10000 are saved

 To retrieve viewpoints from a file,
 source my_vp_file.tcl


DOWNLOAD THE FILE:
	view_change_render.tcl

AUTHOR:
Barry Isralewitz