@Override
@Test
public void testAngle() {
final AlmostEqualDouble.ContextRelative ec = TestUtilities.getDoubleEqualityContext3dp();
{
final PVectorI2I<T> v0 = new PVectorI2I<T>(1, 0);
final PVectorI2I<T> v1 = new PVectorI2I<T>(1, 0);
final double angle = PVectorI2I.angle(v0, v1);
Assert.assertTrue(AlmostEqualDouble.almostEqual(ec, angle, 0.0));
}
{
final int x = (int) (Math.random() * 200);
final int y = (int) (Math.random() * 200);
final PVectorI2I<T> v0 = new PVectorI2I<T>(x, y);
final PVectorI2I<T> v1 = new PVectorI2I<T>(y, -x);
final double angle = PVectorI2I.angle(v0, v1);
Assert.assertTrue(AlmostEqualDouble.almostEqual(ec, angle, Math.toRadians(90)));
}
{
final int x = (int) (Math.random() * 200);
final int y = (int) (Math.random() * 200);
final PVectorI2I<T> v0 = new PVectorI2I<T>(x, y);
final PVectorI2I<T> v1 = new PVectorI2I<T>(-y, x);
final double angle = PVectorI2I.angle(v0, v1);
Assert.assertTrue(AlmostEqualDouble.almostEqual(ec, angle, Math.toRadians(90)));
}
}
@Override
@Test
public void testDotProductSelf() {
final AlmostEqualDouble.ContextRelative ec = TestUtilities.getDoubleEqualityContext();
for (int index = 0; index < TestUtilities.TEST_RANDOM_ITERATIONS; ++index) {
final int max = 1000;
final int x = (int) (Math.random() * max);
final int y = (int) (Math.random() * max);
final PVectorI2I<T> q = new PVectorI2I<T>(x, y);
final double dp = PVectorI2I.dotProduct(q, q);
AlmostEqualDouble.almostEqual(ec, 1.0, dp);
}
}