public void Subtraction()
{
Vector4F a = new Vector4F(1.0f, 2.0f, 3.0f, 4.0f);
Vector4F b = new Vector4F(10.0f, -10.0f, 0.5f, 2.5f);
Vector4F c = Vector4F.Subtract(a, b);
Assert.AreEqual(new Vector4F(-9.0f, 12.0f, 2.5f, 1.5f), c);
}
public void subtracting_vectors_leaves_right_unchanged()
{
var left = new Vector4F(1.0f, 2, 3, 4);
var right = new Vector4F(3.0f, 4, 5, 6);
var expectedRight = new Vector4F(right);
left.Subtract(right);
Assert.Equal(expectedRight, right);
}
public void subtracting_vector_subtracts_from_components()
{
var actual = new Vector4F(1.0f, 15, 5, 3);
var right = new Vector4F(3.0f, 4, 10, 1);
var expected = new Vector4F(-2.0f, 11, -5, 2);
actual.Subtract(right);
Assert.Equal(expected, actual);
}
public void Subtract()
{
Vector4F v1 = new Vector4F(1.0f, 2.0f, 3.0f, 4.0f);
Vector4F v2 = new Vector4F(4.0f, 5.0f, 6.0f, 7.0f);
Vector4F v3 = v1 - v2;
Assert.AreEqual(-3.0f, v3.X, 1e-14);
Assert.AreEqual(-3.0f, v3.Y, 1e-14);
Assert.AreEqual(-3.0f, v3.Z, 1e-14);
Assert.AreEqual(-3.0f, v3.W, 1e-14);
Vector4F v4 = v1.Subtract(v2);
Assert.AreEqual(-3.0f, v4.X, 1e-14);
Assert.AreEqual(-3.0f, v4.Y, 1e-14);
Assert.AreEqual(-3.0f, v4.Z, 1e-14);
Assert.AreEqual(-3.0f, v4.W, 1e-14);
}