GuruBlog

for this ronin experiment I combined the pixel transformation functions with the animation event handler to scale and rotate the previous frame. this creates a rotating vortex and everything drawn on the screen is sliding into the void slowly

this is the code i used to create the effect:

(defn color (r g b a) (
  (concat "rgba(" r "," g "," b "," a ")")
))

(resetTransform)
(clear)

(def w (sub (div (of (frame) :w ) 2) 200))
(def h (div (of (frame) :h ) 2))

(on "animate" '(
  (def c (random 100 255))
  (move w h)
  (rotate 0.007)
  (scale 0.99)
  (stroke
   (circle
    (random (mul -1 w) w)
    (random (mul -1 h) h)
    (random 10 50)
   )
  (random 1 10)
  (color c c c 128))
  (translate
    (rect 0 0 (mul 2 w) (mul h 2))
    (pos (mul -1 w) (mul -1 h))
  )
(resetTransform)
(fill (frame) "#00000004")
))