smooth_scroll.vim

" Smooth Scroll
"
" Remamps 
"  <C-U>
"  <C-D>
"  <C-F>
"  <C-B>
"
" to allow smooth scrolling of the window. I find that quick changes of
" context don't allow my eyes to follow the action properly.
"
" The global variable g:scroll_factor changes the scroll speed.
"
"
" Written by Brad Phelan 2006
" http://xtargets.com
"
" Changelog:
" Modified by David Brown 02-2013 http://davtar.org
" * Uses sleep isntead of a while(1) loop

let g:scroll_factor = 2
function! SmoothScroll(dir, windiv, factor)
   let sleeptime = g:scroll_factor * a:factor . "m"
   let wh=winheight(0)
   let i=0
   while i < wh / a:windiv
      let i = i + 1
      if a:dir=="d"
         normal j
      else
         normal k
      end
      redraw
      "sleep l:sleeptime
      exe 'sleep ' . sleeptime
   endwhile
endfunction
map  :call SmoothScroll("d",2, 2)
map  :call SmoothScroll("u",2, 2)
map  :call SmoothScroll("d",1, 1)
map  :call SmoothScroll("u",1, 1)