Completed clue3

src/clue3/Main.java

@@ -0,0 +1,75 @@
+package clue3;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+public class Main {
+
+	public static void main(String[] args) {
+		try {
+			FileInputStream stream = new FileInputStream("clue3.png");
+			BufferedImage image = ImageIO.read(stream);
+			stream.close();
+			int width  = image.getWidth();
+			int height = image.getHeight();
+			int[] raw  = image.getRGB(0, 0, width, height, null, 0, width);
+			int[] output = new int[width * height];
+
+			int xmin = 0, xmax = width  - 1;
+			int ymin = 0, ymax = height - 1;
+
+			int x = 0;
+			int y = 0;
+			int dir = 3;
+			for (int i = 0; i < width * height; ++i) {
+				output[i] = raw[x + y * width];
+				switch (dir) {
+					case 0:
+						if (x == xmax) {
+							--xmax;
+							++y;
+							++dir;
+						}
+						else
+							++x;
+						break;
+					case 1:
+						if (y == ymax) {
+							--ymax;
+							--x;
+							++dir;
+						}
+						else
+							++y;
+						break;
+					case 2:
+						if (x == xmin) {
+							++xmin;
+							--y;
+							++dir;
+						}
+						else
+							--x;
+						break;
+					case 3:
+						if (y == ymin) {
+							++ymin;
+							++x;
+							dir = 0;
+						}
+						else
+							--y;
+						break;
+				}
+			}
+
+			image.setRGB(0, 0, width, height, output, 0, width);
+			ImageIO.write(image, "png", new File("clue3_output.png"));
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}