public void BasisFunsTest0()
{
// page 71
double[] U = { 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5 };
int degree = 0;
double[] N = NURBS.BasisFuns(4, degree, U, 5.0 / 2.0);
Assert.AreEqual(1.0, N[0]);
}
public void DerBasisFunsTest()
{
double[] U = { 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5 };
int degree = 2;
double[][] ders = NURBS.DerBasisFuns(4, 5.0 / 2.0, degree, n: 1, U: U);
Assert.AreEqual(-1.0 / 2, ders[1][0]);
Assert.AreEqual(0, ders[1][1]);
Assert.AreEqual(1.0 / 2, ders[1][2]);
}
public void NipTest1()
{
double[] U = { 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5 };
int degree = 1;
double N3_1 = NURBS.Nip(3, degree, U, 5.0 / 2.0);
Assert.AreEqual(1.0 / 2, N3_1);
double N4_1 = NURBS.Nip(4, degree, U, 5.0 / 2.0);
Assert.AreEqual(1.0 / 2, N4_1);
}
public void NipTest2()
{
double[] U = { 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5 };
int degree = 2;
double N2_2 = NURBS.Nip(2, degree, U, 5.0 / 2.0);
Assert.AreEqual(1.0 / 8, N2_2);
double N3_2 = NURBS.Nip(3, degree, U, 5.0 / 2.0);
Assert.AreEqual(6.0 / 8, N3_2);
double N4_2 = NURBS.Nip(4, degree, U, 5.0 / 2.0);
Assert.AreEqual(1.0 / 8, N4_2);
}
public void FindSpanTest()
{
int p = 2;
double[] U = { 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5 };
int span = NURBS.FindSpan(p, 5.0 / 2.0, U);
Assert.AreEqual(4, span);
span = NURBS.FindSpan(p, 4.0, U);
Assert.AreEqual(7, span);
span = NURBS.FindSpan(p, 4.5, U);
Assert.AreEqual(7, span);
}
