Julia set: Difference between revisions

=={{header|Kotlin}}==

{{trans|Java}}

<lang scala>import java.awt.*

import java.awt.image.BufferedImage

import javax.swing.JFrame

class Julia_panel : javax.swing.JPanel() {

init {

preferredSize = Dimension(800, 600)

background = Color.white

}

public override fun paintComponent(gg: Graphics) {

super.paintComponent(gg)

with (gg as Graphics2D) {

setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)

val w = width

val h = height

val image = BufferedImage(w, h, BufferedImage.TYPE_INT_RGB)

for (x in 0..w - 1) {

for (y in 0..h - 1) {

var zx = 1.5 * (x - w / 2) / (0.5 * zoom * w) + moveX

var zy = (y - h / 2) / (0.5 * zoom * h) + moveY

var i = maxIter.toFloat()

while (zx * zx + zy * zy < 4 && i > 0) {

val tmp = zx * zx - zy * zy + cX

zy = 2.0 * zx * zy + cY

zx = tmp

i--

}

image.setRGB(x, y, Color.HSBtoRGB(maxIter / i % 1, 1f, (if (i > 0) 1 else 0).toFloat()))

}

}

drawImage(image, 0, 0, null)

}

}

private val maxIter = 300

private val zoom = 1

private val moveX = 0.0

private val moveY = 0.0

private val cY = -0.7

private val cX = 0.27015

}

fun main(args: Array<String>) {

with (JFrame()) {

defaultCloseOperation = JFrame.EXIT_ON_CLOSE

title = "Julia Set"

isResizable = false

add(Julia_panel(), java.awt.BorderLayout.CENTER)

pack()

setLocationRelativeTo(null)

isVisible = true

}

}</lang>