git.gag.com Git - sw/motorsim/blob - src/com/billkuker/rocketry/motorsim/grain/Star.java

   1 package com.billkuker.rocketry.motorsim.grain;\r
   2 \r
   3 import java.awt.Shape;\r
   4 import java.awt.geom.Area;\r
   5 import java.awt.geom.Ellipse2D;\r
   6 import java.awt.geom.GeneralPath;\r
   7 import java.beans.PropertyVetoException;\r
   8 \r
   9 import javax.measure.quantity.Length;\r
  10 import javax.measure.unit.SI;\r
  11 \r
  12 import org.jscience.physics.amount.Amount;\r
  13 \r
  14 import com.billkuker.rocketry.motorsim.Validating;\r
  15 import com.billkuker.rocketry.motorsim.grain.util.BurningShape;\r
  16 import com.billkuker.rocketry.motorsim.grain.util.ExtrudedShapeGrain;\r
  17 \r
  18 public class Star extends ExtrudedShapeGrain implements Validating {\r
  19         private Amount<Length> oD = Amount.valueOf(30, SI.MILLIMETER);\r
  20         private Amount<Length> iD = Amount.valueOf(5, SI.MILLIMETER);\r
  21         private Amount<Length> pD = Amount.valueOf(15, SI.MILLIMETER);\r
  22         private int pointCount = 5;\r
  23         \r
  24         public Star(){\r
  25                 try {\r
  26                         setLength(Amount.valueOf(70, SI.MILLIMETER));\r
  27                 } catch (PropertyVetoException e) {\r
  28                         e.printStackTrace();\r
  29                 }\r
  30                 generateGeometry();\r
  31         }\r
  32         \r
  33         private void generateGeometry(){\r
  34                 double odmm = oD.doubleValue(SI.MILLIMETER);\r
  35                 double idmm = iD.doubleValue(SI.MILLIMETER)/2.0;\r
  36                 double pdmm = pD.doubleValue(SI.MILLIMETER)/2.0;\r
  37                 \r
  38                 xsection = new BurningShape();\r
  39                 Shape outside = new Ellipse2D.Double(-odmm/2, -odmm/2, odmm, odmm);\r
  40                 xsection.add(outside);\r
  41                 xsection.inhibit(outside);\r
  42                 //xsection.subtract(new Ellipse2D.Double(-idmm/2, -idmm/2, idmm, idmm));\r
  43                 webThickness = null;\r
  44                 \r
  45                 GeneralPath p = new GeneralPath();\r
  46                 double theta = 0;\r
  47                 double dTheta = (2.0 * Math.PI) / ( pointCount * 2.0 );\r
  48                 p.moveTo(0, idmm);\r
  49                 for ( int i = 0; i < pointCount; i++ ){\r
  50                         theta += dTheta;\r
  51                         p.lineTo(pdmm*Math.sin(theta), pdmm*Math.cos(theta));\r
  52                         theta += dTheta;\r
  53                         p.lineTo(idmm*Math.sin(theta), idmm*Math.cos(theta));\r
  54                 }\r
  55                 p.closePath();\r
  56                 xsection.subtract(new Area(p));\r
  57         }\r
  58         \r
  59         public Amount<Length> getOD() {\r
  60                 return oD;\r
  61         }\r
  62 \r
  63         public void setOD(Amount<Length> od) throws PropertyVetoException {\r
  64                 if (od.equals(this.oD))\r
  65                         return;\r
  66                 this.oD = od;\r
  67                 generateGeometry();\r
  68         }\r
  69 \r
  70         public Amount<Length> getID() {\r
  71                 return iD;\r
  72         }\r
  73 \r
  74         public void setID(Amount<Length> id) throws PropertyVetoException {\r
  75                 if (id.equals(this.iD))\r
  76                         return;\r
  77                 iD = id;\r
  78                 generateGeometry();\r
  79         }\r
  80         \r
  81         public Amount<Length> getPointDiameter() {\r
  82                 return pD;\r
  83         }\r
  84 \r
  85         public void setPointDiameter(Amount<Length> pd) throws PropertyVetoException {\r
  86                 if (pd.equals(this.pD))\r
  87                         return;\r
  88                 pD = pd;\r
  89                 generateGeometry();\r
  90         }\r
  91         \r
  92         public int getPointCount(){\r
  93                 return pointCount;\r
  94         }\r
  95         \r
  96         public void setPointCount(final int points) throws PropertyVetoException{\r
  97                 if ( points < 2 || points > 8 )\r
  98                         throw new PropertyVetoException("Invalid number of points", null);\r
  99                 pointCount = points;\r
 100                 generateGeometry();\r
 101         }\r
 102         \r
 103         @Override\r
 104         public void validate() throws ValidationException{\r
 105                 if ( iD.equals(Amount.ZERO) )\r
 106                         throw new ValidationException(this, "Invalid iD");\r
 107                 if ( oD.equals(Amount.ZERO) )\r
 108                         throw new ValidationException(this, "Invalid oD");\r
 109                 if ( getLength().equals(Amount.ZERO) )\r
 110                         throw new ValidationException(this, "Invalid Length");\r
 111                 if ( iD.isGreaterThan(oD) )\r
 112                         throw new ValidationException(this, "iD > oD");         \r
 113                 if ( iD.isGreaterThan(pD) )\r
 114                         throw new ValidationException(this, "iD > pD");         \r
 115                 if ( pD.isGreaterThan(oD) )\r
 116                         throw new ValidationException(this, "pD > oD"); \r
 117         }\r
 118 }\r