public void CanCalculateTheDotProductOfTwoVectors()
{
var a = Tuple.NewVector(1, 2, 3);
var b = Tuple.NewVector(2, 3, 4);
Assert.True(FloatMath.AreEqual(20, a.Dot(b)));
}
public void CanCreateAVectorTuple()
{
var t = new Tuple4(4.3, -4.2, 3.1, 0.0);
Assert.True(FloatMath.AreEqual(4.3, t.X));
Assert.True(FloatMath.AreEqual(-4.2, t.Y));
Assert.True(FloatMath.AreEqual(3.1, t.Z));
Assert.True(FloatMath.AreEqual(0.0, t.W));
Assert.False(t.IsPoint);
Assert.True(t.IsVector);
}
public void VectorsHaveAFloatingPointMagnitude(double a, double b, double c)
{
var v = Tuple.NewVector(a, b, c);
Assert.True(FloatMath.AreEqual(v.Magnitude, Math.Sqrt(14)));
}
public void MagnitudeOfANormalizedVectorEqualsOne()
{
var v = Tuple.NewVector(1, 2, 3);
Assert.True(FloatMath.AreEqual(1, v.Normalized.Magnitude));
}
public void VectorsHaveAMagnitude(double a, double b, double c, double expected)
{
var v = Tuple.NewVector(a, b, c);
Assert.True(FloatMath.AreEqual(v.Magnitude, expected));
}