Smoothly rotating to another angle on pano nodes

[James C. W. <jfc...@ya...>]

Hi all,
 
I've been working on a library for cubic panorama rotation, and have run into a problem. 
When I run this code, Pipmak will smoothly rotate to either 90, 90, or 90, -90(disregarding panorama limits), and slowly spins.
I can tell there's something wrong with this code, but I don't know what it is exactly, or how to fix it. Can anyone suggest a possible solution? Thanks very much, if anyone can.
 
CODE**********************************************
 
cubic { "front.jpg", "right.jpg", "back.jpg", "left.jpg", "top.jpg", "bottom.jpg" }
local tarAZ, tarEL = 45, 45
local viewAZ, viewEL = pipmak.getviewdirection()
local speedAZ, speedEL
   
      if viewAZ > tarAZ then
        speedAZ = viewAZ / tarAZ 
      elseif viewAZ < tarAZ then
        speedAZ = tarAZ / viewAZ 
      end
      if viewEL > tarEL then
        speedEL = viewEL / tarEL
      elseif viewEL < tarEL then
        speedEL = tarEL / viewEL
      end
hotspotmap "hotspotmap.png"
hotspot {
  onmousedown = function()
  pipmak.schedule(
    0.02,
  function()
      viewAZ, viewEL = pipmak.getviewdirection()   
      if viewAZ == tarAZ and viewEL == tarEL then 
      viewAZ, viewEL = tarAZ, tarEL 
      else
      pipmak.setviewdirection( viewAZ + 0.8, viewEL * speedEL + 0.8 ) 
      end
      return 0.02
   end
  )
end
}
      
  
END CODE *************************************
 
Thanks again,  
  James