Data commit

Task/Julia-set/Scala/julia-set.scala

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