@Test
public void test_intersectsWithinSegment() {
Straight s1 = new Straight(new Point(), new Point(10, 10));
Straight s2 = new Straight(new Point(), new Point(-10, 10));
boolean thrown = false;
try {
s1.intersectsWithinSegment(new Vector(0, 0), new Vector(0, 1), s2);
} catch (IllegalArgumentException x) {
thrown = true;
}
assertTrue(thrown);
thrown = false;
try {
s1.intersectsWithinSegment(new Vector(1, 0), new Vector(0, 0), s2);
} catch (IllegalArgumentException x) {
thrown = true;
}
assertTrue(thrown);
assertTrue("fallthrough", s1.intersectsWithinSegment(new Vector(0, 0), new Vector(0, 0), s2));
assertTrue(s1.intersectsWithinSegment(new Vector(-1, -1), new Vector(0, 0), s2));
assertTrue(s1.intersectsWithinSegment(new Vector(1, 1), new Vector(0, 0), s2));
assertTrue(s1.intersectsWithinSegment(new Vector(-1, -1), new Vector(1, 1), s2));
assertFalse(s1.intersectsWithinSegment(new Vector(-1, -1), new Vector(-20, -20), s2));
assertFalse(s1.intersectsWithinSegment(new Vector(1, 1), new Vector(20, 20), s2));
assertFalse(
s1.intersectsWithinSegment(
new Vector(-20, -20),
new Vector(20, 20),
new Straight(new Vector(10, 0), new Vector(10, 10))));
}
@Test
public void test_getCopy() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
assertTrue(s1.getCopy().equals(s1));
assertTrue(s1.clone().equals(s1));
assertTrue(s1.getCopy().equals(s1.clone()));
}
@Test
public void test_getProjection() {
Straight s1 = new Straight(new Point(), new Point(0, 1));
for (int i = 0; i < 10; i++) {
Vector v = new Vector(i + 1, i - 1);
assertTrue(s1.getProjection(v).equals(new Vector(0, i - 1)));
}
}
@Test
public void test_getDistance() {
Straight s1 = new Straight(new Point(), new Point(0, 1));
for (int i = 0; i < 10; i++) {
Vector v = new Vector(i + 1, i - 1);
assertTrue(PrecisionUtils.equal(s1.getDistance(v), i + 1));
}
}
@Test
public void test_constructors() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
Straight s2 = new Straight(new Point(0, 0), new Point(3, 3));
assertTrue(s1.equals(s2));
s1 = new Straight(new Vector(1, 2), new Vector(3, 4));
s2 = new Straight(new Point(1, 2), new Point(3, 4));
assertFalse(s1.equals(s2));
}
@Test
public void test_isParallelTo_with_Straight() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
Straight s2 = new Straight(new Vector(0, 4), new Vector(2, 2));
assertTrue(s1.isParallelTo(s2));
s1 = new Straight(new Vector(0, 0), new Vector(5, 5));
s2 = new Straight(new Vector(0, 5), new Vector(0, 5));
assertFalse(s1.isParallelTo(s2));
}
@Test
public void test_getSignedDistance() {
Straight s1 = new Straight(new Point(), new Point(0, -1));
for (int i = -5; i <= 0; i++) {
Vector v = new Vector(i, 0);
assertTrue(PrecisionUtils.equal(s1.getSignedDistanceCW(v), i));
assertTrue(PrecisionUtils.equal(s1.getSignedDistanceCCW(v), -i));
}
for (int i = 0; i <= 5; i++) {
Vector v = new Vector(i, 0);
assertTrue(PrecisionUtils.equal(s1.getSignedDistanceCW(v), i));
assertTrue(PrecisionUtils.equal(s1.getSignedDistanceCCW(v), -i));
}
}
@Test
public void test_getAngle_withStraight() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
Straight s2 = new Straight(new Vector(0, 4), new Vector(2, 2));
assertTrue(s1.getAngle(s2).equals(Angle.fromDeg(0)));
assertTrue(s1.getAngleCW(s2).equals(Angle.fromDeg(0)));
assertTrue(s1.getAngleCCW(s2).equals(Angle.fromDeg(0)));
s1 = new Straight(new Vector(0, 0), new Vector(5, 5));
s2 = new Straight(new Vector(0, 5), new Vector(0, 5));
assertTrue(s1.getAngle(s2).equals(Angle.fromDeg(45)));
assertTrue(s1.getAngleCW(s2).equals(Angle.fromDeg(45)));
assertTrue(s1.getAngleCCW(s2).equals(Angle.fromDeg(135)));
}
@Test
public void test_equals() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
Straight s2 = new Straight(new Vector(4, 4), new Vector(2, 2));
assertTrue(s1.equals(s2));
assertTrue(s2.equals(s1));
assertFalse(s1.equals(new Straight(new Vector(2, 0), s1.direction)));
// wrong type
assertFalse(s1.equals(new Point()));
}
@Test
public void test_contains() {
Straight s1 = new Straight(new Vector(0, 0), new Vector(3, 3));
assertTrue(s1.contains(new Vector(0, 0)));
assertTrue(s1.contains(new Vector(1, 1)));
assertTrue(s1.contains(new Vector(2, 2)));
assertTrue(s1.contains(new Vector(-1, -1)));
assertTrue(s1.contains(new Vector(-2, -2)));
assertFalse(s1.contains(new Vector(0, 1)));
assertFalse(s1.contains(new Vector(-1, 0)));
}
@Test
public void test_containsWithinSegment() {
Straight s1 = new Straight(new Point(), new Point(0, -1));
boolean thrown = false;
try {
s1.containsWithinSegment(new Vector(0, 0), new Vector(1, 2), new Vector(0, 1));
} catch (IllegalArgumentException x) {
thrown = true;
}
assertTrue(thrown);
thrown = false;
try {
s1.containsWithinSegment(new Vector(1, 2), new Vector(0, 0), new Vector(0, 1));
} catch (IllegalArgumentException x) {
thrown = true;
}
assertTrue(thrown);
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, 10), new Vector(0, 0)));
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, -10), new Vector(0, 0)));
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, 0), new Vector(0, 0)));
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, 10), new Vector(0, 5)));
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, -10), new Vector(0, -5)));
assertFalse(s1.containsWithinSegment(new Vector(0, 1), new Vector(0, 10), new Vector(0, 0)));
assertFalse(s1.containsWithinSegment(new Vector(0, -1), new Vector(0, -10), new Vector(0, 0)));
assertFalse(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, 10), new Vector(0, -5)));
assertFalse(s1.containsWithinSegment(new Vector(0, 0), new Vector(0, -10), new Vector(0, 5)));
s1 = new Straight(new Point(), new Point(1, 0));
assertTrue(s1.containsWithinSegment(new Vector(0, 0), new Vector(3, 0), new Vector(2, 0)));
assertFalse(s1.containsWithinSegment(new Vector(0, 0), new Vector(3, 0), new Vector(5, 0)));
}
@Test
public void test_toString() {
Straight s1 = new Straight(new Point(), new Point(0, -1));
assertEquals("Straight: Vector: [0.0,0.0] + s * Vector: [0.0,-1.0]", s1.toString());
}
@Test
public void test_parameter_point() {
// normalized direction vector, so that one can comprehend the
// parameter's value
Straight s1 = new Straight(new Point(), new Point(0, -1));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(0, 0)), 0));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(0, -1)), 1));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(0, 1)), -1));
assertTrue(s1.getPositionVectorAt(0).equals(new Vector(0, 0)));
assertTrue(s1.getPositionVectorAt(2).equals(new Vector(0, -2)));
assertTrue(s1.getPositionVectorAt(-2).equals(new Vector(0, 2)));
s1 = new Straight(new Point(), new Point(1, 0));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(0, 0)), 0));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(2, 0)), 2));
assertTrue(PrecisionUtils.equal(s1.getParameterAt(new Vector(-2, 0)), -2));
assertTrue(s1.getPositionVectorAt(0).equals(new Vector(0, 0)));
assertTrue(s1.getPositionVectorAt(1).equals(new Vector(1, 0)));
assertTrue(s1.getPositionVectorAt(-1).equals(new Vector(-1, 0)));
// test 0/0 straight (not a straight anymore)
s1 = new Straight(new Point(), new Point());
boolean thrown = false;
try {
s1.getParameterAt(new Vector(0, 0));
} catch (IllegalArgumentException x) {
thrown = true;
} catch (IllegalStateException x) {
thrown = true;
}
assertTrue(thrown);
}
@Test
public void test_getIntersection_with_Straight() {
// test integer precision
Vector p = new Vector(1, 1);
Vector a = new Vector(2, 1);
Vector q = new Vector(1, 4);
Vector b = new Vector(1, -1);
Straight s1 = new Straight(p, a);
Straight s2 = new Straight(q, b);
assertTrue(s1.intersects(s2));
Vector intersection = s1.getIntersection(s2);
assertTrue(intersection.equals(new Vector(3, 2)));
assertTrue(s1.contains(intersection));
assertTrue(s2.contains(intersection));
// check straight does not intersect itself
assertFalse(s1.intersects(s1));
assertFalse(s2.intersects(s2));
assertNull(new Straight(p, a).getIntersection(new Straight(p, a)));
// test double precision
p = new Vector(0, 0);
a = new Vector(new Point(0, 0), new Point(5, 5));
q = new Vector(0, 5);
b = new Vector(new Point(0, 5), new Point(5, 0));
s1 = new Straight(p, a);
s2 = new Straight(q, b);
assertTrue(s1.intersects(s2));
intersection = s1.getIntersection(s2);
assertTrue(intersection.equals(new Vector(2.5, 2.5)));
assertTrue(s1.contains(intersection));
assertTrue(s2.contains(intersection));
Point p1 = new Point(-2, 1);
Point p2 = new Point(1, 1);
Point p3 = new Point(0, 0);
Point p4 = new Point(0, 3);
s1 = new Straight(p1, p2);
s2 = new Straight(p3, p4);
assertTrue(s1.intersects(s2));
intersection = s1.getIntersection(s2);
assertTrue(intersection.equals(new Vector(0, 1)));
assertTrue(s1.contains(intersection));
assertTrue(s2.contains(intersection));
// check four rounding effects
p1 = new Point(-50, 5);
p2 = new Point(7, 104);
p3 = new Point(0, 0);
p4 = new Point(0, 3);
s1 = new Straight(p1, p2);
s2 = new Straight(p3, p4);
assertTrue(s1.intersects(s2));
intersection = s1.getIntersection(s2);
assertNotNull(intersection);
assertTrue(s1.contains(intersection));
assertTrue(s2.contains(intersection));
// test no intersection
p1 = new Point(0, 10);
p2 = new Point(10, 10);
p3 = new Point(0, 5);
p4 = new Point(10, 5);
s1 = new Straight(p1, p2);
s2 = new Straight(p3, p4);
assertFalse(s1.intersects(s2));
assertFalse(s2.intersects(s1));
intersection = s1.getIntersection(s2);
assertNull(intersection);
}
