1 package org.lcsim.spacegeom;
2 // Test the TwoSegment class.
3 import junit.framework.TestCase;
4
5 import org.lcsim.spacegeom.CartesianTwoPoint;
6 import org.lcsim.spacegeom.TwoSegment;
7 import org.lcsim.spacegeom.TwoSpacePoint;
8
9 public class TwoSegmentTest extends TestCase
10 {
11 boolean debug = false;
12 public void testTwoSegmentTest()
13 {
14
15 String name = "TwoSegment";
16 String ok_prefix = name + " test (I): ";
17 String error_prefix = name + " test (E): ";
18
19 if (debug) System.out.println( ok_prefix
20 + "------- Testing component " + name + ". -------" );
21
22 if (debug) System.out.println( ok_prefix + "Testing constructors." );
23
24 TwoSpacePoint a = new CartesianTwoPoint(1.,1.);
25 TwoSpacePoint b = new CartesianTwoPoint(2.,2.);
26 TwoSegment seg = new TwoSegment(a,b);
27
28 if (debug) System.out.println(seg);
29
30 assertTrue(a.equals(seg.startPoint()));
31 assertTrue(b.equals(seg.endPoint()));
32
33 assertTrue(seg.length()==TwoSpacePoint.distance(a,b));
34
35
36 if (debug) System.out.println( ok_prefix + "Testing intersection." );
37 TwoSegment seg2 = new TwoSegment(a,b);
38
39 assertTrue(TwoSegment.intersection(seg,seg2)==null);
40
41 TwoSegment seg3 = new TwoSegment(new CartesianTwoPoint(-1.,-1.),new CartesianTwoPoint(1.,1.));
42 TwoSegment seg4 = new TwoSegment(new CartesianTwoPoint(-1.,1.),new CartesianTwoPoint(1.,-1.));
43
44 TwoSpacePoint intersection = TwoSegment.intersection(seg3, seg4);
45 if (debug) System.out.println(intersection);
46 assertTrue(intersection.x()==0.);
47 assertTrue(intersection.y()==0.);
48
49
50 // try another...
51 TwoSegment t1 = new TwoSegment(new CartesianTwoPoint(0.25, 0), new CartesianTwoPoint(1.25, 2.0));
52 TwoSegment t2 = new TwoSegment(new CartesianTwoPoint(0.05, 0), new CartesianTwoPoint(-0.947, 2.0));
53 intersection = TwoSegment.intersection(t1, t2);
54 if (debug) System.out.println(intersection);
55
56
57 //**********************************************************************
58
59 if (debug) System.out.println( ok_prefix
60 + "------------- All tests passed. ------------" );
61
62 }
63
64 }