git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/simulation/MassData.java

   1 package net.sf.openrocket.simulation;
   2
   3 import net.sf.openrocket.util.Coordinate;
   4 import net.sf.openrocket.util.MathUtil;
   5
   6 /**
   7  * An immutable value object containing the mass data of a rocket.
   8  *
   9  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  10  */
  11 public class MassData {
  12
  13         private final Coordinate cg;
  14         private final double longitudinalInertia;
  15         private final double rotationalInertia;
  16         private final double propellantMass;
  17
  18
  19         public MassData(Coordinate cg, double longitudinalInertia, double rotationalInertia, double propellantMass) {
  20                 if (cg == null) {
  21                         throw new IllegalArgumentException("cg is null");
  22                 }
  23                 this.cg = cg;
  24                 this.longitudinalInertia = longitudinalInertia;
  25                 this.rotationalInertia = rotationalInertia;
  26                 this.propellantMass = propellantMass;
  27         }
  28
  29
  30
  31
  32         public Coordinate getCG() {
  33                 return cg;
  34         }
  35
  36         public double getLongitudinalInertia() {
  37                 return longitudinalInertia;
  38         }
  39
  40         public double getRotationalInertia() {
  41                 return rotationalInertia;
  42         }
  43
  44         public double getPropellantMass() {
  45                 return propellantMass;
  46         }
  47
  48
  49         @Override
  50         public boolean equals(Object obj) {
  51                 if (this == obj)
  52                         return true;
  53                 if (!(obj instanceof MassData))
  54                         return false;
  55
  56                 MassData other = (MassData) obj;
  57                 return (this.cg.equals(other.cg) && MathUtil.equals(this.longitudinalInertia, other.longitudinalInertia) &&
  58                                 MathUtil.equals(this.rotationalInertia, other.rotationalInertia)) && MathUtil.equals(this.propellantMass, other.propellantMass) ;
  59         }
  60
  61
  62         @Override
  63         public int hashCode() {
  64                 return (int) (cg.hashCode() ^ Double.doubleToLongBits(longitudinalInertia) ^ Double.doubleToLongBits(rotationalInertia) ^ Double.doubleToLongBits(propellantMass) );
  65         }
  66
  67
  68         @Override
  69         public String toString() {
  70                 return "MassData [cg=" + cg + ", longitudinalInertia=" + longitudinalInertia
  71                                 + ", rotationalInertia=" + rotationalInertia + ", propellantMass="+propellantMass + "]";
  72         }
  73
  74 }