Add aphorism 5: agitation

.joker

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+{:known-macros [quil.core/defsketch]}

src/aphorisms/five.clj

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+(ns aphorisms.five
+  (:require [quil.core :as q]
+            [quil.middleware :as m]))
+
+;; ---
+;; agitation
+;; ---
+
+(defn denominators [n]
+  (->> (range 1 (int (/ n 2)))
+       (filter #(= 0 (rem n %)))))
+
+(def width 500)
+(def height 500)
+
+(def margin 36)
+(def n-lines 107)
+
+(defn settings []
+  (q/pixel-density (q/display-density)))
+
+(defn setup []
+  (q/frame-rate 30)
+  (q/color-mode :hsb)
+  (q/stroke 20)
+  ;; we build up our lines as a grid
+  {:lines (let [h (- height (* 2 margin))
+                w (- width (* 2 margin))
+                ys (->> (range n-lines)
+                        (map #(+ margin (* % (/ h n-lines)))))
+                xs (->> (range n-lines)
+                        (map #(+ margin (* % (/ w n-lines)))))]
+            (into {} (map (fn [y] [y xs]) ys)))})
+
+
+
+(def update-state identity)
+
+;; determines how fast the noise progresses
+;; the higher the friction the slower the progression
+(def friction 100)
+
+;; how much influence does the noise have?
+(def amplification 4)
+
+(defn draw-state [state]
+  (q/background 240)
+  (doseq [[y xs] (:lines state)
+          [x1 x2] (->> (interleave xs (rest xs))
+                       (partition 2))]
+    (q/line x1 (+ (* (q/noise (+ (/ (q/frame-count) friction) x1) y) amplification) y)
+            x2 (+ (* (q/noise (+ (/ (q/frame-count) friction) x2) y) amplification) y))))
+
+(q/defsketch aphorism-five
+  :title "Agitation"
+  :size [500 500]
+  :settings settings
+  :setup setup
+  :update update-state
+  :draw draw-state
+  :renderer :p3d
+  :features [:keep-on-top :no-bind-output]
+  :middleware [m/fun-mode m/pause-on-error])