Data commit

Task/Polyspiral/Kotlin/polyspiral.kotlin

@@ -0,0 +1,55 @@
+// version 1.1.0
+
+import java.awt.*
+import java.awt.event.ActionEvent
+import javax.swing.*
+
+class PolySpiral() : JPanel() {
+    private var inc = 0.0
+
+    init {
+        preferredSize = Dimension(640, 640)
+        background = Color.white
+        Timer(40) {
+            inc = (inc + 0.05) % 360.0
+            repaint()
+        }.start()
+    }
+
+    private fun drawSpiral(g: Graphics2D, length: Int, angleIncrement: Double) {
+        var x1 = width / 2.0
+        var y1 = height / 2.0
+        var len = length
+        var angle = angleIncrement
+        for (i in 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 * 2.0)
+        }
+    }
+
+    override protected fun paintComponent(gg: Graphics) {
+        super.paintComponent(gg)
+        val g = gg as Graphics2D
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
+        drawSpiral(g, 5, Math.toRadians(inc))
+    }
+}
+
+fun main(args: Array<String>) {
+    SwingUtilities.invokeLater {
+        val f = JFrame()
+        f.defaultCloseOperation = JFrame.EXIT_ON_CLOSE
+        f.title = "PolySpiral"
+        f.setResizable(true)
+        f.add(PolySpiral(), BorderLayout.CENTER)
+        f.pack()
+        f.setLocationRelativeTo(null)
+        f.setVisible(true)
+    }
+}