# HG changeset patch
# User Ingo Weinzierl <ingo.weinzierl@intevation.de>
# Date 1347625034 0
# Node ID d8f2ab5b61c31681e03960dc571c6867dcb4fec5
# Parent  a6f5bb10eff4205875d0cf9b7526935a35ee9ba6
Added JFreeUtil.randomizeLine() to generate randomized lines.

flys-artifacts/trunk@5467 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r a6f5bb10eff4 -r d8f2ab5b61c3 flys-artifacts/ChangeLog
--- a/flys-artifacts/ChangeLog	Fri Sep 14 08:01:02 2012 +0000
+++ b/flys-artifacts/ChangeLog	Fri Sep 14 12:17:14 2012 +0000
@@ -1,3 +1,8 @@
+2012-09-14  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/jfree/JFreeUtil.java: Added function to
+	  generate a randomized line.
+
 2012-09-14  Ingo Weinzierl <ingo@intevation.de>
 
 	* doc/conf/themes.xml: Defined new mappings for the six bed quality
diff -r a6f5bb10eff4 -r d8f2ab5b61c3 flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java
--- a/flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java	Fri Sep 14 08:01:02 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java	Fri Sep 14 12:17:14 2012 +0000
@@ -1,19 +1,20 @@
 package de.intevation.flys.jfree;
 
+import java.awt.Shape;
+import java.awt.geom.Rectangle2D;
+import java.util.Iterator;
+import java.util.Random;
+
+import org.apache.log4j.Logger;
+import org.jfree.chart.entity.ChartEntity;
+import org.jfree.chart.entity.EntityCollection;
+import org.w3c.dom.Document;
+
 import de.intevation.flys.artifacts.math.Function;
 
-import java.awt.Shape;
-
-import java.awt.geom.Rectangle2D;
-
-import java.util.Iterator;
-
-import org.jfree.chart.entity.ChartEntity;
-import org.jfree.chart.entity.EntityCollection;
-
-import org.w3c.dom.Document;
-
 public class JFreeUtil {
+    
+    private static final Logger logger = Logger.getLogger(JFreeUtil.class);
 
     /** Do not instantiate. */
     private JFreeUtil() {
@@ -50,6 +51,50 @@
 
         return false;
     }
+    
+    
+    /**
+     * This function samples a randomized line that contains of x and y values
+     * between <i>startX</i>, <i>endX</i>, <i>startY</i> and <i>endY</i>. The
+     * number of points in the line is specified by <i>num</i>.
+     * 
+     * @param num The number of points in the line.
+     * @param startX The min value of the x values.
+     * @param endX The max value of the x values.
+     * @param startY The min value of the y values.
+     * @param endY The max value of the y values.
+     * @return an array with [allX-values, allY-values].
+     * @throws IllegalArgumentException
+     */
+    public static double[][] randomizeLine(
+        int    num,
+        double startX,
+        double endX,
+        double startY,
+        double endY
+    ) throws IllegalArgumentException
+    {
+        if (num <= 0) {
+            throw new IllegalArgumentException("Parameter 'num' has to be > 0");
+        }
+        
+        Random random = new Random();
+        
+        double[] x = new double[num];
+        double[] y = new double[num];
+        
+        for (int i = 0; i < num; i++) {
+            double xFac = random.nextDouble();
+            double yFac = random.nextDouble();
+            
+            x[i] = startX + xFac * (endX - startX);
+            y[i] = startY + yFac * (endY - startY);
+            
+            logger.debug("Created new point: " + x[i] + "|" + y[i]);
+        }
+        
+        return new double[][] { x, y };
+    }
 
 
     public static StyledXYSeries sampleFunction2D(