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

   1 package net.sf.openrocket.util;
   2
   3 import org.junit.Test;
   4 import static org.junit.Assert.assertEquals;
   5
   6
   7 public class TransformationTest {
   8         @Test
   9         public void oldMainTest() {
  10                 Transformation t;
  11
  12                 t = new Transformation();
  13                 {
  14                         Coordinate a = t.transform( new Coordinate(1,0,0) );
  15                         assertEquals( new Coordinate(1,0,0), a );
  16                         a = t.transform( new Coordinate(0,1,0) );
  17                         assertEquals( new Coordinate(0,1,0), a );
  18                         a = t.transform( new Coordinate(0,0,1) );
  19                         assertEquals( new Coordinate(0,0,1), a );
  20                 }
  21
  22                 t = new Transformation(1,2,3);
  23                 {
  24                         Coordinate a = t.transform( new Coordinate(1,0,0) );
  25                         assertEquals( new Coordinate(2,2,3), a );
  26                         a = t.transform( new Coordinate(0,1,0) );
  27                         assertEquals( new Coordinate(1,3,3), a );
  28                         a = t.transform( new Coordinate(0,0,1) );
  29                         assertEquals( new Coordinate(1,2,4), a );
  30                 }
  31
  32
  33                 t = new Transformation(new Coordinate(2,3,4));
  34                 {
  35                         Coordinate a = t.transform( new Coordinate(1,0,0) );
  36                         assertEquals( new Coordinate(3,3,4), a );
  37                         a = t.transform( new Coordinate(0,1,0) );
  38                         assertEquals( new Coordinate(2,4,4), a );
  39                         a = t.transform( new Coordinate(0,0,1) );
  40                         assertEquals( new Coordinate(2,3,5), a );
  41                 }
  42
  43                 // FIXME - is this correct?  shouldn't a rotation preserve coordinate length?
  44                 t = Transformation.rotate_y(0.01);
  45                 {
  46                         Coordinate a = t.transform( new Coordinate(1,0,0) );
  47                         // we need to test individual coordinates due to error.
  48                         assertEquals( 1, a.x, .001);
  49                         assertEquals( 0, a.y, .001);
  50                         assertEquals( -.01, a.z, .001);
  51                         a = t.transform( new Coordinate(0,1,0) );
  52                         assertEquals( new Coordinate(0,1,0), a );
  53                         a = t.transform( new Coordinate(0,0,1) );
  54                         // we need to test individual coordinates due to error.
  55                         assertEquals( .01, a.x, .001);
  56                         assertEquals( 0, a.y, .001);
  57                         assertEquals( 1, a.z, .001);
  58                 }
  59
  60                 t = new Transformation(-1,0,0);
  61                 t = t.applyTransformation(Transformation.rotate_y(0.01));
  62                 t = t.applyTransformation(new Transformation(1,0,0));
  63                 {
  64                         Coordinate a = t.transform( new Coordinate(1,0,0) );
  65                         // we need to test individual coordinates due to error.
  66                         assertEquals( 1, a.x, .001);
  67                         assertEquals( 0, a.y, .001);
  68                         assertEquals( -.02, a.z, .001);
  69                         a = t.transform( new Coordinate(0,1,0) );
  70                         assertEquals( 0, a.x, .001);
  71                         assertEquals( 1, a.y, .001);
  72                         assertEquals( -.01, a.z, .001);
  73                         a = t.transform( new Coordinate(0,0,1) );
  74                         // we need to test individual coordinates due to error.
  75                         assertEquals( .01, a.x, .001);
  76                         assertEquals( 0, a.y, .001);
  77                         assertEquals( .99, a.z, .001);
  78                 }
  79         }
  80
  81
  82 }