1 package org.lcsim.spacegeom;
2 //package spacegeom;
3 // Test the spacepoint class.
4 import junit.framework.TestCase;
5
6 import org.lcsim.spacegeom.CartesianTwoPoint;
7 import org.lcsim.spacegeom.CylindricalTwoPoint;
8 import org.lcsim.spacegeom.TwoSpacePoint;
9
10
11 public class CylindricalTwoPointTest extends TestCase
12 {
13 boolean debug = false;
14 private static boolean myequal(double x1, double x2)
15 {
16 return (Math.abs(x2-x1) < 1.e-12);
17 }
18
19 //**********************************************************************
20
21 public void testCylindricalTest()
22 {
23
24 String name = "CylindricalTwoPoint";
25 String ok_prefix = name + " test (I): ";
26 String error_prefix = name + " test (E): ";
27
28 if (debug) System.out.println( ok_prefix
29 + "------- Testing component " + name + ". -------" );
30
31 double x = 1.23;
32 double y = 2.46;
33
34 //**********************************************************************
35
36 if (debug) System.out.println( ok_prefix + "Testing constructors." );
37 // Create a space point
38 CartesianTwoPoint cart = new CartesianTwoPoint(x,y);
39 if (debug) System.out.println( cart );
40
41 // Create in cylindrical coordinates.
42 CylindricalTwoPoint cyl = new CylindricalTwoPoint( cart.rxy(), cart.phi() );
43 if (debug) System.out.println( cyl );
44
45 if ( ! myequal(cyl.x(),x) || ! myequal(cyl.y(),y) )
46 {
47 if (debug) System.out.println( error_prefix + "Mismatch." );
48 System.exit(1);
49 }
50
51 //**********************************************************************
52
53 if (debug) System.out.println( ok_prefix + "Testing assignment." );
54 TwoSpacePoint spt = new TwoSpacePoint();
55 if (debug) System.out.println( spt );
56 spt = cyl;
57 if (debug) System.out.println( spt );
58 if ( ! myequal(spt.x(),cyl.x()) || ! myequal(spt.y(),cyl.y()) )
59 {
60 if (debug) System.out.println( error_prefix + "Mismatch." );
61 System.exit(1);
62 }
63
64 //**********************************************************************
65
66 if (debug) System.out.println( ok_prefix + "Test cos and sin returns." );
67 assertTrue( myequal( spt.cosPhi(), Math.cos( spt.phi() ) ) );
68 assertTrue( myequal( spt.sinPhi(), Math.sin( spt.phi() ) ) );
69
70 //**********************************************************************
71
72 if (debug) System.out.println( ok_prefix + "Test equality." );
73 CartesianTwoPoint spt2 = new CartesianTwoPoint(spt.x(),spt.y());
74 assertTrue( spt.equals(spt2) );
75 assertTrue( ! (spt.notEquals(spt2)) );
76 CartesianTwoPoint spt3 = new CartesianTwoPoint(spt.x()+0.1,spt.y());
77 assertTrue( ! (spt.equals(spt3)) );
78 assertTrue( spt.notEquals(spt3) );
79 CartesianTwoPoint spt4 = new CartesianTwoPoint(spt.x(),spt.y()+0.2);
80 assertTrue( spt.notEquals(spt4) );
81
82 //**********************************************************************
83
84 if (debug) System.out.println( ok_prefix + "Test distance function." );
85 assertTrue( TwoSpacePoint.distance(cart,cart) == 0.0 );
86 double dx = 1.1;
87 double dy = 2.2;
88 double dist0 = Math.sqrt(dx*dx+dy*dy);
89 CartesianTwoPoint cart2 = new CartesianTwoPoint(x+dx,y+dy);
90 if (debug) System.out.println( cart );
91 if (debug) System.out.println( cart2 );
92 double dist = TwoSpacePoint.distance(cart,cart2);
93 if (debug) System.out.println( "Distance = " + dist0 + " " + dist );
94 assertTrue( Math.abs( dist - dist0 ) < 1.e-12 );
95
96 //**********************************************************************
97
98 if (debug) System.out.println( ok_prefix
99 + "------------- All tests passed. ------------" );
100
101 }
102 }