Data commit

Task/Polyspiral/Scala/polyspiral.scala

@@ -0,0 +1,55 @@
+import java.awt._
+import java.awt.event.ActionEvent
+
+import javax.swing._
+
+object PolySpiral extends App {
+
+  SwingUtilities.invokeLater(() =>
+    new JFrame("PolySpiral") {
+
+      class PolySpiral extends JPanel {
+        private var inc = 0.0
+
+        override def paintComponent(gg: Graphics): Unit = {
+          val g = gg.asInstanceOf[Graphics2D]
+          def drawSpiral(g: Graphics2D, l: Int, angleIncrement: Double): Unit = {
+            var len = l
+            var (x1, y1) = (getWidth / 2d, getHeight / 2d)
+            var angle = angleIncrement
+            for (i <- 0 until 150) {
+              g.setColor(Color.getHSBColor(i / 150f, 1.0f, 1.0f))
+              val x2 = x1 + math.cos(angle) * len
+              val y2 = y1 - math.sin(angle) * len
+              g.drawLine(x1.toInt, y1.toInt, x2.toInt, y2.toInt)
+              x1 = x2
+              y1 = y2
+              len += 3
+              angle = (angle + angleIncrement) % (math.Pi * 2)
+            }
+          }
+
+          super.paintComponent(gg)
+          g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
+          drawSpiral(g, 5, math.toRadians(inc))
+        }
+
+        setBackground(Color.white)
+        setPreferredSize(new Dimension(640, 640))
+
+        new Timer(40, (_: ActionEvent) => {
+          inc = (inc + 0.05) % 360
+          repaint()
+        }).start()
+      }
+
+      add(new PolySpiral, BorderLayout.CENTER)
+      pack()
+      setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)
+      setLocationRelativeTo(null)
+      setResizable(true)
+      setVisible(true)
+    }
+  )
+
+}