you can fly!? Lua scripting for Project Dogwaffle:

Waving in the Breeze
(or under water)

more: lua scripts


Here is a script which will let you create animations of waving grass in wind, or under water. (the rising bubbles in this example were added with the Snowfall filter in the Timeline editor while the animation frames were flipped upside-down).

It applys a sine wave to the canvass, with the power of the wave based on the y distance, so the effect tends to fade away towards the bottom.  It supports animation, and the image can be sheared as well, making your reeds look like they're bent over.

If you create several different versions with different time offsets and composite them together, I think you can get what you're looking
for.

The script:
--
-- How to create an animation waving grass (wind blown).
--
-- It applys a sine wave to the canvass, with the power of the wave
-- based on the y distance, so the effect tends to fade away towards
-- the bottom.  It supports animation, and the image can be sheared as
-- well, making your reeds look like they're bent over.
--
-- If you create several different versions with different time offsets
-- and composite them together, I think you can get what you're looking
-- for.



-- filename: wave_in_breeze.lua

function wave(frequency, power, phase,shear)

local x, y, r, g, b,v
local x2, y2

shear=(shear/100)

for y = 0, height - 1 do
  for x = 0, width - 1 do
   
     v=math.cos((phase+((y/height))*frequency)*.01745)
     --multiply by y to fade the effect out
     v=v*(1-(y/height))
     v=v*power
     v=v-(shear*(height-y))
     x2=x+v
     y2=y
     if x2<0 then x2=0 end
     if x2>(width-1) then x2=(width-1) end
 
     r, g, b = get_rgb(x2, y2)

    set_rgb(x, y, r, g, b)
  end
  progress(y / height)
end

end






-- the main program.

Dog_SaveUndo()

GUI_SetCaption("Wave")
h1 = GUI_AddControl("Scroller", "Power", 40, 0, 100)
h2 = GUI_AddControl("Scroller", "Frequency", 100, 0, 1000)
h3 = GUI_AddControl("Scroller", "Speed", 10, 0, 50)
h4 = GUI_AddControl("Scroller", "Shear", 0, 0, 100)

GUI_OpenPanel()


--event loop.  Repeat until ok or cancel pressed (index of -1 or -2)

repeat
   idx, retval, retstr = GUI_WaitOnEvent()

   power, string=GUI_GetSettings(h1)
   frequency, string=GUI_GetSettings(h2)
   speed, string=    GUI_GetSettings(h3)
   shear, string=    GUI_GetSettings(h4)

   if (idx>-1) then
     wave(frequency, power, 0,shear)
     Dog_Refresh()
   end
until idx < 0 --repeat until


GUI_ClosePanel()

if idx == -2 then
--Restore the image
  Dog_RestoreUndo()
  Dog_GetBuffer()
end

  if idx == -1 then
--apply to frames
  Dog_RestoreUndo()
  Dog_GetBuffer()

  frames=Dog_GetTotalFrames()
  currentframe=Dog_GetCurrentFrame()
    for n=0,frames-1 do
      Dog_GotoFrame(n)
      wave(frequency, power, n*speed,shear)
      Dog_Refresh()
    end
  Dog_GotoFrame(currentframe)
  end
to probe further:

Samples:


Tutorials:

the file:   wave_in_breeze.lua

Samples:


WindBlown2.avi
(Xvid codec, 63 kb)

Dark Seaweed:
(painted in Dogwaffle with Particle brushes)



Animated clip: waving_seaweeds0-ind4.avi


Animated Brush (with Black in secondary color for transparency key)
dark-seaweed-waving.7z
 - (183 kb compressed with 7zip, uncompresses to 20+ MB)

Clips: (Indeo 4.5 codec)
Multiple instances rendered at various opacity levels, sizes and locations with the Brush Keyframer!


waving_seaweeds1-ind4.avi  (0.5 MB)

waving_seaweeds5-ind4.avi  (1 MB)