sine-wave

sine-wave.clj

(ns sine-wave
  (:use quil.core))

(def screen-w 1920)
(def screen-h 1080)
(def current-color (atom []))

(defn- init-current-color []
  (doseq [i (range 3)]
    (swap! current-color assoc i (random 255))))

(defn- change-current-color []
  (doseq [i (range 3)]
    (let [change-direction (random 3)
          current-color-value (@current-color i)]
      (cond
        (< change-direction 1) (swap! current-color assoc i (- current-color-value 5))
        (> change-direction 2) (swap! current-color assoc i (+ current-color-value 5))
        :else nil))))

(defn setup []
  (init-current-color)
  (smooth)
  (background 0)
  (no-loop))

(defn draw []
  (doseq [y (range -100 (+ screen-h 100))]
    (apply stroke @current-color)
    (doseq [x (range screen-w)]
      (point x (+ y (* 100 (Math/sin (/ x 60))))))
    (change-current-color))
  (save "sine-wave.png"))

(defsketch main
  :title "Sine wave"
  :setup setup
  :draw draw
  :size [screen-w screen-h])