git.gag.com Git - sw/motorsim/blob - test/com/billkuker/rocketry/motorsim/test/ShapeUtilTest.java

   1 package com.billkuker.rocketry.motorsim.test;\r
   2 \r
   3 import java.awt.geom.Area;\r
   4 import java.awt.geom.Ellipse2D;\r
   5 import java.awt.geom.Rectangle2D;\r
   6 \r
   7 import org.jscience.physics.amount.Amount;\r
   8 import org.junit.Test;\r
   9 \r
  10 import com.billkuker.rocketry.motorsim.grain.util.ShapeUtil;\r
  11 \r
  12 \r
  13 public class ShapeUtilTest extends RocketTest{\r
  14 \r
  15         Area tenByTen = new Area(new Rectangle2D.Double(-5, -5, 10, 10));\r
  16         Area oneByOne = new Area(new Rectangle2D.Double(-.5, -.5, 1, 1));\r
  17         Area twoByTwoFar = new Area( new Rectangle2D.Double(30,30,2,2));\r
  18         \r
  19         Area r2Circle = new Area(new Ellipse2D.Double(-2,-2,4,4));\r
  20 \r
  21 \r
  22         Amount<javax.measure.quantity.Area> diff = Amount.valueOf(.01, sqMM);\r
  23         \r
  24         @Test\r
  25         public void testArea(){\r
  26                 assertApproximate(ShapeUtil.area(tenByTen), Amount.valueOf(100, sqMM));\r
  27                 assertApproximate(ShapeUtil.area(oneByOne), Amount.valueOf(1, sqMM));\r
  28                 assertApproximate(ShapeUtil.area(twoByTwoFar), Amount.valueOf(4, sqMM));\r
  29                 assertApproximate(ShapeUtil.area(r2Circle), Amount.valueOf(4*Math.PI, sqMM), diff);\r
  30                 \r
  31                 Area a = new Area(tenByTen);\r
  32                 a.subtract(oneByOne);\r
  33                 \r
  34                 assertApproximate(ShapeUtil.area(a), ShapeUtil.area(tenByTen).minus(ShapeUtil.area(oneByOne)));\r
  35                 \r
  36                 a.add(twoByTwoFar);\r
  37                 \r
  38                 assertApproximate(ShapeUtil.area(a), \r
  39                                 ShapeUtil.area(tenByTen)\r
  40                                         .minus(ShapeUtil.area(oneByOne))\r
  41                                         .plus(ShapeUtil.area(twoByTwoFar)));\r
  42                 \r
  43                 a = new Area(tenByTen);\r
  44                 a.subtract(r2Circle);\r
  45                 \r
  46                 assertApproximate(ShapeUtil.area(a), ShapeUtil.area(tenByTen).minus(ShapeUtil.area(r2Circle)));\r
  47         }\r
  48 }\r