git.gag.com Git - debian/openrocket/blob - core/test/net/sf/openrocket/util/CoordinateTest.java

   1 package net.sf.openrocket.util;
   2
   3 import static org.junit.Assert.*;
   4
   5 import org.junit.Test;
   6
   7 public class CoordinateTest {
   8
   9         private static final double EPS = 0.0000000001;
  10
  11         @Test
  12         public void coordinateTest() {
  13
  14                 Coordinate x = new Coordinate(1,1,1,1);
  15                 Coordinate y = new Coordinate(1,2,3,4);
  16
  17                 assertCoordinateEquals(new Coordinate(2,1,1,1), x.setX(2));
  18                 assertCoordinateEquals(new Coordinate(1,2,1,1), x.setY(2));
  19                 assertCoordinateEquals(new Coordinate(1,1,2,1), x.setZ(2));
  20                 assertCoordinateEquals(new Coordinate(1,1,1,2), x.setWeight(2));
  21                 assertCoordinateEquals(new Coordinate(2,3,4,1), x.setXYZ(y).add(1,1,1));
  22
  23                 assertFalse(x.isNaN());
  24                 assertTrue(x.setX(Double.NaN).isNaN());
  25                 assertTrue(Coordinate.NaN.isNaN());
  26
  27                 assertTrue(x.isWeighted());
  28                 assertFalse(x.setWeight(0).isWeighted());
  29
  30
  31                 assertCoordinateEquals(x, x.add(Coordinate.NUL));
  32                 assertCoordinateEquals(new Coordinate(2,3,4,5), x.add(y));
  33                 assertCoordinateEquals(new Coordinate(2,3,4,1), x.add(1,2,3));
  34                 assertCoordinateEquals(new Coordinate(2,3,4,5), x.add(1,2,3,4));
  35
  36                 assertCoordinateEquals(new Coordinate(0,-1,-2,1), x.sub(y));
  37                 assertCoordinateEquals(new Coordinate(0,-1,-2,1), x.sub(1,2,3));
  38
  39                 assertCoordinateEquals(new Coordinate(2,4,6,8), y.multiply(2));
  40
  41                 assertEquals(1+2+3, y.dot(x), EPS);
  42                 assertEquals(1+2+3, x.dot(y), EPS);
  43                 assertEquals(1+2+3, Coordinate.dot(x,y), EPS);
  44                 assertEquals(x.dot(x), x.length2(), EPS);
  45                 assertEquals(y.dot(y), y.length2(), EPS);
  46                 assertEquals(Math.sqrt(1+4+9), y.length(), EPS);
  47                 assertEquals(1, y.normalize().length(), EPS);
  48
  49                 assertCoordinateEquals(new Coordinate(1.75,1.75,1.75,4),
  50                                 new Coordinate(1,1,1,1).average(new Coordinate(2,2,2,3)));
  51                 assertCoordinateEquals(new Coordinate(1,1,1,1),
  52                                 new Coordinate(1,1,1,1).average(new Coordinate(2,2,2,0)));
  53                 assertCoordinateEquals(new Coordinate(1.5,1.5,1.5,0),
  54                                 new Coordinate(1,1,1,0).average(new Coordinate(2,2,2,0)));
  55
  56         }
  57
  58
  59         private void assertCoordinateEquals(Coordinate a, Coordinate b) {
  60                 assertEquals(a, b);
  61                 assertEquals(a.weight, b.weight, EPS);
  62         }
  63
  64 }