58 lines
1.6 KiB
Scala
58 lines
1.6 KiB
Scala
import java.awt._
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import java.awt.event.ActionEvent
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import java.awt.image.BufferedImage
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import javax.swing._
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import scala.math.{sin, sqrt}
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object PlasmaEffect extends App {
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SwingUtilities.invokeLater(() =>
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new JFrame("Plasma Effect") {
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class PlasmaEffect extends JPanel {
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private val (w, h) = (640, 640)
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private var hueShift = 0.0f
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override def paintComponent(gg: Graphics): Unit = {
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val g = gg.asInstanceOf[Graphics2D]
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def drawPlasma(g: Graphics2D) = {
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val img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB)
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for (y <- 0 until h;
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x <- 0 until w) {
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def design =
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(sin(x / 16f) + sin(y / 8f) + sin((x + y) / 16f) + sin(sqrt(x * x + y * y) / 8f) + 4).toFloat / 8
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img.setRGB(x, y, Color.HSBtoRGB(hueShift + design % 1, 1, 1))
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}
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g.drawImage(img, 0, 0, null)
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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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drawPlasma(g)
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}
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// animate about 24 fps and shift hue value with every frame
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new Timer(42, (_: ActionEvent) => {
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hueShift = (hueShift + 0.02f) % 1
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repaint()
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}).start()
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setBackground(Color.white)
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setPreferredSize(new Dimension(h, w))
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}
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add(new PlasmaEffect, 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(false)
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setVisible(true)
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})
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}
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