Data commit

Task/Fractal-tree/Clojure/fractal-tree.clj

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+(import '[java.awt Color Graphics]
+	'javax.swing.JFrame)
+
+(defn deg-to-radian [deg] (* deg Math/PI 1/180))
+(defn cos-deg [angle] (Math/cos (deg-to-radian angle)))
+(defn sin-deg [angle] (Math/sin (deg-to-radian angle)))
+
+(defn draw-tree [^Graphics g, x y angle depth]
+  (when (pos? depth)
+    (let [x2 (+ x (int (* depth 10 (cos-deg angle))))
+	  y2 (+ y (int (* depth 10 (sin-deg angle))))]
+      (.drawLine g x y x2 y2)
+      (draw-tree g x2 y2 (- angle 20) (dec depth))
+      (recur     g x2 y2 (+ angle 20) (dec depth)))))
+
+(defn fractal-tree [depth]
+  (doto (proxy [JFrame] []
+	  (paint [g]
+		 (.setColor g Color/BLACK)
+		 (draw-tree g 400 500 -90 depth)))
+    (.setBounds 100 100 800 600)
+    (.setResizable false)
+    (.setDefaultCloseOperation JFrame/DISPOSE_ON_CLOSE)
+    (.show)))
+
+(fractal-tree 9)