Created
March 20, 2011 00:54
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(ns polygonization.test (:import (javax.swing JSlider JFrame JLabel JPanel))) | |
(defn panel [] | |
(proxy [JPanel] [] (paintComponent [g] (proxy-super paintComponent g)))) | |
(defn create-new-pane [content-panel] | |
(doto (JFrame.) (.setContentPane content-panel) (.setSize 200 200) (.show))) | |
(defn update-drawing [content-panel draw-fn] | |
(update-proxy content-panel {"paintComponent" (fn [t g] (.clearRect g 0 0 (.getWidth content-panel) (.getHeight content-panel)) (draw-fn g))}) | |
(.repaint content-panel)) | |
(defn offset-circle [x y r] | |
(let [offset (/ r 2) | |
adjust-x (- x offset) | |
adjust-y (- y offset)] | |
[adjust-x adjust-y r r])) | |
(defn point [x y] | |
(offset-circle x y 4)) | |
(defn draw-point [g x y] | |
(apply (memfn drawOval x y w h) g (point x y))) | |
(defn draw-points [g points] | |
(doseq [point points] (apply draw-point g point))) | |
(defn draw-lines [g coord-pairs] | |
(doseq [[x1 y1 x2 y2] coord-pairs] | |
(.drawLine g x1 y1 x2 y2))) | |
(defn polygonalize-points [points] | |
(let [points-by-x (reverse (sort-by first points)) | |
rightmost-point (first points-by-x) | |
rightmost-x (first rightmost-point) | |
rightmost-y (rightmost-point 1) | |
points-by-angle (cons (cons | |
rightmost-point | |
(sort-by (fn [[x y]] (Math/atan (float (/ (- y rightmost-y) (- x rightmost-x))))) | |
(rest points-by-x))) | |
rightmost-point)] | |
(partition 4 2 (flatten points-by-angle)))) | |
(defn -main [] | |
(let [my-panel (panel) | |
points [[10 10] [30 20] [100 120] [90 60] [95 19 ] [90 90] [25 195] [144 144]]] | |
(create-new-pane my-panel) | |
(update-drawing my-panel (fn [g] | |
(draw-lines g (polygonalize-points points)) | |
(draw-points g (points)))))) |
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