Data commit

Task/Plasma-effect/Scala/plasma-effect.scala

@@ -0,0 +1,58 @@
+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)
+    })
+
+}