58 lines
1.7 KiB
Scala
58 lines
1.7 KiB
Scala
import java.awt._
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import java.awt.image.BufferedImage
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import javax.swing._
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object JuliaSet extends App {
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SwingUtilities.invokeLater(() =>
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new JFrame("Julia Set") {
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class JuliaSet() extends JPanel {
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private val (maxIter, zoom) = (300, 1)
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override def paintComponent(gg: Graphics): Unit = {
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val g = gg.asInstanceOf[Graphics2D]
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def drawJuliaSet(g: Graphics2D): Unit = {
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val (w, h) = (getWidth, getHeight)
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val image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB)
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val (cX, cY) = (-0.7, 0.27015)
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val moveX, moveY = 0
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var zx, zy = 0.0
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for (x <- 0 until w;
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y <- 0 until h) {
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zx = 1.5 * (x - w / 2) / (0.5 * zoom * w) + moveX
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zy = (y - h / 2) / (0.5 * zoom * h) + moveY
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var i: Float = maxIter
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while (zx * zx + zy * zy < 4 && i > 0) {
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val tmp = zx * zx - zy * zy + cX
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zy = 2.0 * zx * zy + cY
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zx = tmp
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i -= 1
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}
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val c = Color.HSBtoRGB((maxIter / i) % 1, 1, if (i > 0) 1 else 0)
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image.setRGB(x, y, c)
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}
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g.drawImage(image, 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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drawJuliaSet(g)
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}
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setBackground(Color.white)
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setPreferredSize(new Dimension(800, 600))
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}
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add(new JuliaSet, 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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}
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