git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/rocketcomponent/EllipticalFinSet.java

   1 package net.sf.openrocket.rocketcomponent;
   2
   3 import net.sf.openrocket.l10n.Translator;
   4 import net.sf.openrocket.startup.Application;
   5 import net.sf.openrocket.util.Coordinate;
   6 import net.sf.openrocket.util.MathUtil;
   7
   8 public class EllipticalFinSet extends FinSet {
   9         private static final Translator trans = Application.getTranslator();
  10
  11         public static final int POINTS = 21;
  12
  13         private static final double[] POINT_X = new double[POINTS];
  14         private static final double[] POINT_Y = new double[POINTS];
  15         static {
  16                 for (int i=0; i < POINTS; i++) {
  17                         double a = Math.PI * (POINTS-1-i)/(POINTS-1);
  18                         POINT_X[i] = (Math.cos(a)+1)/2;
  19                         POINT_Y[i] = Math.sin(a);
  20                 }
  21                 POINT_X[0] = 0;
  22                 POINT_Y[0] = 0;
  23                 POINT_X[POINTS-1] = 1;
  24                 POINT_Y[POINTS-1] = 0;
  25         }
  26
  27
  28         private double height = 0.05;
  29
  30         public EllipticalFinSet() {
  31                 this.length = 0.05;
  32         }
  33
  34
  35         @Override
  36         public Coordinate[] getFinPoints() {
  37                 Coordinate[] points = new Coordinate[POINTS];
  38                 for (int i=0; i < POINTS; i++) {
  39                         points[i] = new Coordinate(POINT_X[i]*length, POINT_Y[i]*height);
  40                 }
  41                 return points;
  42         }
  43
  44         @Override
  45         public double getSpan() {
  46                 return height;
  47         }
  48
  49         @Override
  50         public String getComponentName() {
  51                 //// Elliptical fin set
  52                 return trans.get("EllipticalFinSet.Ellipticalfinset");
  53         }
  54
  55
  56         public double getHeight() {
  57                 return height;
  58         }
  59
  60         public void setHeight(double height) {
  61                 if (MathUtil.equals(this.height, height))
  62                         return;
  63                 this.height = height;
  64                 fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE);
  65         }
  66
  67
  68         public void setLength(double length) {
  69                 if (MathUtil.equals(this.length, length))
  70                         return;
  71                 this.length = length;
  72                 fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE);
  73         }
  74
  75
  76 }