public void negative_values_produce_same_magnitude_squared()
{
var vector = new Vector4F(0.1f, 2, 3, -4);
var expected = vector.GetMagnitudeSquared();
var actual = vector.GetNegative().GetMagnitudeSquared();
Assert.Equal(expected, actual);
}
public void can_get_negative_vector()
{
var source = new Vector4F(-2.0f, 5, -12, 3);
var expected = new Vector4F(2.0f, -5, 12, -3);
var actual = source.GetNegative();
Assert.Equal(expected, actual);
}
public void opposite_vector_angle_is_pi()
{
var left = new Vector4F(14.0f, 98, -19, 88);
var right = left.GetNegative();
var expected = (float)Math.PI;
var actual = left.GetAngleBetween(right);
Assert.Equal(expected, actual, 10);
}