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

   1 package net.sf.openrocket.rocketcomponent;
   2
   3 import java.util.List;
   4
   5 import net.sf.openrocket.l10n.Translator;
   6 import net.sf.openrocket.material.Material;
   7 import net.sf.openrocket.material.Material.Type;
   8 import net.sf.openrocket.preset.ExternalComponentPreset;
   9 import net.sf.openrocket.preset.RocketComponentPreset;
  10 import net.sf.openrocket.startup.Application;
  11 import net.sf.openrocket.unit.UnitGroup;
  12 import net.sf.openrocket.util.Prefs;
  13
  14 /**
  15  * Class of components with well-defined physical appearance and which have an effect on
  16  * aerodynamic simulation.  They have material defined for them, and the mass of the component
  17  * is calculated using the component's volume.
  18  *
  19  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  20  */
  21
  22 public abstract class ExternalComponent extends RocketComponent {
  23
  24         public enum Finish {
  25                 //// Rough
  26                 ROUGH("ExternalComponent.Rough", 500e-6),
  27                 //// Unfinished
  28                 UNFINISHED("ExternalComponent.Unfinished", 150e-6),
  29                 //// Regular paint
  30                 NORMAL("ExternalComponent.Regularpaint", 60e-6),
  31                 //// Smooth paint
  32                 SMOOTH("ExternalComponent.Smoothpaint", 20e-6),
  33                 //// Polished
  34                 POLISHED("ExternalComponent.Polished", 2e-6);
  35
  36                 private static final Translator trans = Application.getTranslator();
  37                 private final String name;
  38                 private final double roughnessSize;
  39
  40                 Finish(String name, double roughness) {
  41                         this.name = name;
  42                         this.roughnessSize = roughness;
  43                 }
  44
  45                 public double getRoughnessSize() {
  46                         return roughnessSize;
  47                 }
  48
  49                 @Override
  50                 public String toString() {
  51                         return trans.get(name) + " (" + UnitGroup.UNITS_ROUGHNESS.toStringUnit(roughnessSize) + ")";
  52                 }
  53         }
  54
  55
  56         /**
  57          * The material of the component.
  58          */
  59         protected Material material = null;
  60
  61         protected Finish finish = Finish.NORMAL;
  62
  63
  64
  65         /**
  66          * Constructor that sets the relative position of the component.
  67          */
  68         public ExternalComponent(RocketComponent.Position relativePosition) {
  69                 super(relativePosition);
  70                 this.material = Prefs.getDefaultComponentMaterial(this.getClass(), Material.Type.BULK);
  71         }
  72
  73         /**
  74          * Returns the volume of the component.  This value is used in calculating the mass
  75          * of the object.
  76          */
  77         public abstract double getComponentVolume();
  78
  79         /**
  80          * Calculates the mass of the component as the product of the volume and interior density.
  81          */
  82         @Override
  83         public double getComponentMass() {
  84                 return material.getDensity() * getComponentVolume();
  85         }
  86
  87         /**
  88          * ExternalComponent has aerodynamic effect, so return true.
  89          */
  90         @Override
  91         public boolean isAerodynamic() {
  92                 return true;
  93         }
  94
  95         /**
  96          * ExternalComponent has effect on the mass, so return true.
  97          */
  98         @Override
  99         public boolean isMassive() {
 100                 return true;
 101         }
 102
 103
 104         public Material getMaterial() {
 105                 return material;
 106         }
 107
 108         public void setMaterial(Material mat) {
 109                 if (mat.getType() != Material.Type.BULK) {
 110                         throw new IllegalArgumentException("ExternalComponent requires a bulk material" +
 111                                         " type=" + mat.getType());
 112                 }
 113
 114                 if (material.equals(mat))
 115                         return;
 116                 material = mat;
 117                 clearPreset();
 118                 fireComponentChangeEvent(ComponentChangeEvent.MASS_CHANGE);
 119         }
 120
 121         public Finish getFinish() {
 122                 return finish;
 123         }
 124
 125         public void setFinish(Finish finish) {
 126                 if (this.finish == finish)
 127                         return;
 128                 this.finish = finish;
 129                 fireComponentChangeEvent(ComponentChangeEvent.AERODYNAMIC_CHANGE);
 130         }
 131
 132
 133         @Override
 134         protected void loadFromPreset(RocketComponentPreset preset) {
 135                 super.loadFromPreset(preset);
 136
 137                 ExternalComponentPreset p = (ExternalComponentPreset) preset;
 138                 String materialName = p.getMaterialName();
 139                 double mass = p.getMass();
 140
 141                 double volume = getComponentVolume();
 142                 double density;
 143                 if (volume > 0.00001) {
 144                         density = mass / volume;
 145                 } else {
 146                         density = 1000;
 147                 }
 148
 149                 Material mat = Material.newMaterial(Type.BULK, materialName, density, true);
 150                 setMaterial(mat);
 151         }
 152
 153
 154         @Override
 155         protected List<RocketComponent> copyFrom(RocketComponent c) {
 156                 ExternalComponent src = (ExternalComponent) c;
 157                 this.finish = src.finish;
 158                 this.material = src.material;
 159                 return super.copyFrom(c);
 160         }
 161
 162 }