Plasma effect: Difference between revisions

=={{header|Scala}}==

===Java Swing Interoperability===

<lang Scala>import java.awt._

import java.awt.event.ActionEvent

import java.awt.image.BufferedImage

import javax.swing._

import scala.math.{sin, sqrt}

object PlasmaEffect extends App {

SwingUtilities.invokeLater(() =>

new JFrame("Plasma Effect") {

class PlasmaEffect extends JPanel {

private val (w, h) = (640, 640)

private var hueShift = 0.0f

override def paintComponent(gg: Graphics): Unit = {

val g = gg.asInstanceOf[Graphics2D]

def drawPlasma(g: Graphics2D) = {

val img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB)

for (y <- 0 until h;

x <- 0 until w) {

def design =

(sin(x / 16f) + sin(y / 8f) + sin((x + y) / 16f) + sin(sqrt(x * x + y * y) / 8f) + 4).toFloat / 8

img.setRGB(x, y, Color.HSBtoRGB(hueShift + design % 1, 1, 1))

}

g.drawImage(img, 0, 0, null)

}

super.paintComponent(gg)

g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)

drawPlasma(g)

}

// animate about 24 fps and shift hue value with every frame

new Timer(42, (_: ActionEvent) => {

hueShift = (hueShift + 0.02f) % 1

repaint()

}).start()

setBackground(Color.white)

setPreferredSize(new Dimension(h, w))

}

add(new PlasmaEffect, BorderLayout.CENTER)

pack()

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE)

setLocationRelativeTo(null)

setResizable(false)

setVisible(true)

})

}</lang>