func get_nurbs_B() *gm.Nurbs {
verts := [][]float64{
{5.0, 10, 0, 1}, // global 0
{8.0, 10, 0, 1}, // global 1
{8.0, 13, 0, 1}, // global 2
{5.0, 13, 0, 1}, // global 3
{6.0, 11, 0, 1}, // global 4
{6.0, 12, 0, 1}, // global 5
{7.0, 11, 0, 1}, // global 6
{7.0, 12, 0, 1}, // global 7
}
knots := [][]float64{
{0, 0, 0, 0.5, 1, 1, 1},
{0, 0, 1, 1},
}
ctrls := []int{
0, 4, 6, 1, // first level along x
3, 5, 7, 2, // second level along x
}
var nurbs gm.Nurbs
nurbs.Init(2, []int{2, 1}, knots)
nurbs.SetControl(verts, ctrls)
return &nurbs
}
