Complete Maya Programming Volume II

9.2NURBSCurves

405

The number of control vertices in the curve is determined from the degree and spans

requested.

int $nCVs -- $degree + $nSpans;

Because the curve needs to start at the first control vertex and end at the last control

vertex, knot multiplicity is used to achieve this. By repeating the first and last knots

as many times as the degree of the curve, the curve will start and end at the first and

last control vertices. This will be clearer in material to follow, which defines the

cuFve's knot vectoL

int $multiplicity = $degree;

The $cv s array holds the control vertices of the curve.

vector $cvs[];

Positions on