1 package org.lcsim.spacegeom;
2 // Test the spacepoint class.
3 import junit.framework.TestCase;
4
5 import org.lcsim.spacegeom.CartesianTwoPoint;
6 import org.lcsim.spacegeom.CylindricalTwoPoint;
7 import org.lcsim.spacegeom.TwoSpacePoint;
8
9 public class TwoSpacePointTest extends TestCase
10 {
11 boolean debug = false;
12 private static boolean myequal(double x1, double x2)
13 {
14 return (Math.abs(x2-x1) < 1.e-12);
15 }
16
17 //**********************************************************************
18
19 public void testTwoSpacePoint()
20 {
21
22 String name = "TwoSpacePoint";
23 String ok_prefix = name + " test (I): ";
24 String error_prefix = name + " test (E): ";
25
26 if (debug) System.out.println( ok_prefix
27 + "------- Testing component " + name + ". -------" );
28
29 double x = 1.23;
30 double y = 2.46;
31
32 //**********************************************************************
33
34 if (debug) System.out.println( ok_prefix + "Testing constructors." );
35 // Create a space point
36 CartesianTwoPoint cart = new CartesianTwoPoint(x,y);
37 if (debug) System.out.println( cart );
38
39 // Create in cylindrical coordinates.
40 CylindricalTwoPoint cyl = new CylindricalTwoPoint( cart.rxy(), cart.phi() );
41 if (debug) System.out.println( cyl );
42
43 if ( ! myequal(cyl.x(),x) || ! myequal(cyl.y(),y) )
44 {
45 if (debug) System.out.println( error_prefix + "Mismatch." );
46 System.exit(1);
47 }
48
49 //**********************************************************************
50
51 if (debug) System.out.println( ok_prefix + "Testing assignment." );
52 TwoSpacePoint spt = new TwoSpacePoint();
53 if (debug) System.out.println( spt );
54 spt = cyl;
55 if (debug) System.out.println( spt );
56 if ( ! myequal(spt.x(),cyl.x()) || ! myequal(spt.y(),cyl.y()) )
57 {
58 if (debug) System.out.println( error_prefix + "Mismatch." );
59 System.exit(1);
60 }
61
62 //**********************************************************************
63
64 if (debug) System.out.println( ok_prefix + "Test cos and sin returns." );
65 assertTrue( myequal( spt.cosPhi(), Math.cos( spt.phi() ) ) );
66 assertTrue( myequal( spt.sinPhi(), Math.sin( spt.phi() ) ) );
67
68 //**********************************************************************
69
70 if (debug) System.out.println( ok_prefix + "Test equality." );
71 CartesianTwoPoint spt2 = new CartesianTwoPoint(spt.x(),spt.y());
72 assertTrue( spt.equals(spt2) );
73 assertTrue( ! (spt.notEquals(spt2)) );
74 CartesianTwoPoint spt3 = new CartesianTwoPoint(spt.x()+0.1,spt.y());
75 assertTrue( ! (spt.equals(spt3)) );
76 assertTrue( spt.notEquals(spt3) );
77 CartesianTwoPoint spt4 = new CartesianTwoPoint(spt.x(),spt.y()+0.2);
78 assertTrue( spt.notEquals(spt4) );
79
80 //**********************************************************************
81
82 if (debug) System.out.println( ok_prefix + "Test distance function." );
83 assertTrue( TwoSpacePoint.distance(cart,cart) == 0.0 );
84 double dx = 1.1;
85 double dy = 2.2;
86 double dist0 = Math.sqrt(dx*dx+dy*dy);
87 CartesianTwoPoint cart2 = new CartesianTwoPoint(x+dx,y+dy);
88 if (debug) System.out.println( cart );
89 if (debug) System.out.println( cart2 );
90 double dist = TwoSpacePoint.distance(cart,cart2);
91 if (debug) System.out.println( "Distance = " + dist0 + " " + dist );
92 assertTrue( Math.abs( dist - dist0 ) < 1.e-12 );
93
94 //**********************************************************************
95
96 if (debug) System.out.println( ok_prefix
97 + "------------- All tests passed. ------------" );
98
99 }
100 }