Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/jfree/JFreeUtil.java @ 3765:d8f2ab5b61c3
Added JFreeUtil.randomizeLine() to generate randomized lines.
flys-artifacts/trunk@5467 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Fri, 14 Sep 2012 12:17:14 +0000 |
| parents | 63ef889eea2b |
| children | 5a8f8fd5310c |
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| 3764:a6f5bb10eff4 | 3765:d8f2ab5b61c3 |
|---|---|
| 1 package de.intevation.flys.jfree; | 1 package de.intevation.flys.jfree; |
| 2 | |
| 3 import java.awt.Shape; | |
| 4 import java.awt.geom.Rectangle2D; | |
| 5 import java.util.Iterator; | |
| 6 import java.util.Random; | |
| 7 | |
| 8 import org.apache.log4j.Logger; | |
| 9 import org.jfree.chart.entity.ChartEntity; | |
| 10 import org.jfree.chart.entity.EntityCollection; | |
| 11 import org.w3c.dom.Document; | |
| 2 | 12 |
| 3 import de.intevation.flys.artifacts.math.Function; | 13 import de.intevation.flys.artifacts.math.Function; |
| 4 | 14 |
| 5 import java.awt.Shape; | |
| 6 | |
| 7 import java.awt.geom.Rectangle2D; | |
| 8 | |
| 9 import java.util.Iterator; | |
| 10 | |
| 11 import org.jfree.chart.entity.ChartEntity; | |
| 12 import org.jfree.chart.entity.EntityCollection; | |
| 13 | |
| 14 import org.w3c.dom.Document; | |
| 15 | |
| 16 public class JFreeUtil { | 15 public class JFreeUtil { |
| 16 | |
| 17 private static final Logger logger = Logger.getLogger(JFreeUtil.class); | |
| 17 | 18 |
| 18 /** Do not instantiate. */ | 19 /** Do not instantiate. */ |
| 19 private JFreeUtil() { | 20 private JFreeUtil() { |
| 20 } | 21 } |
| 21 | 22 |
| 48 } | 49 } |
| 49 } | 50 } |
| 50 | 51 |
| 51 return false; | 52 return false; |
| 52 } | 53 } |
| 54 | |
| 55 | |
| 56 /** | |
| 57 * This function samples a randomized line that contains of x and y values | |
| 58 * between <i>startX</i>, <i>endX</i>, <i>startY</i> and <i>endY</i>. The | |
| 59 * number of points in the line is specified by <i>num</i>. | |
| 60 * | |
| 61 * @param num The number of points in the line. | |
| 62 * @param startX The min value of the x values. | |
| 63 * @param endX The max value of the x values. | |
| 64 * @param startY The min value of the y values. | |
| 65 * @param endY The max value of the y values. | |
| 66 * @return an array with [allX-values, allY-values]. | |
| 67 * @throws IllegalArgumentException | |
| 68 */ | |
| 69 public static double[][] randomizeLine( | |
| 70 int num, | |
| 71 double startX, | |
| 72 double endX, | |
| 73 double startY, | |
| 74 double endY | |
| 75 ) throws IllegalArgumentException | |
| 76 { | |
| 77 if (num <= 0) { | |
| 78 throw new IllegalArgumentException("Parameter 'num' has to be > 0"); | |
| 79 } | |
| 80 | |
| 81 Random random = new Random(); | |
| 82 | |
| 83 double[] x = new double[num]; | |
| 84 double[] y = new double[num]; | |
| 85 | |
| 86 for (int i = 0; i < num; i++) { | |
| 87 double xFac = random.nextDouble(); | |
| 88 double yFac = random.nextDouble(); | |
| 89 | |
| 90 x[i] = startX + xFac * (endX - startX); | |
| 91 y[i] = startY + yFac * (endY - startY); | |
| 92 | |
| 93 logger.debug("Created new point: " + x[i] + "|" + y[i]); | |
| 94 } | |
| 95 | |
| 96 return new double[][] { x, y }; | |
| 97 } | |
| 53 | 98 |
| 54 | 99 |
| 55 public static StyledXYSeries sampleFunction2D( | 100 public static StyledXYSeries sampleFunction2D( |
| 56 Function func, | 101 Function func, |
| 57 Document theme, | 102 Document theme, |