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