NurbsPositionInterpolator describes a 3D NURBS curve and outputs interpolated position values.
The NurbsPositionInterpolator node belongs to the NURBS component and its default container field is children. It is available since X3D version 3.0 or later.
1 2 3 + X3DNode + X3DChildNode + NurbsPositionInterpolator
SFNode [in, out] metadata NULL [X3DMetadataObject]
Metadata are not part of the X3D world and not interpreted by the X3D browser, but they can be accessed via the ECMAScript interface.
SFFloat [in] set_fraction (-∞,∞)
Setting fraction in range [0,1] selects input key for corresponding keyValue output, computing a 3D position on the curve.
SFNode [in, out] controlPoint NULL [X3DCoordinateNode]
Input/Output field controlPoint.
MFDouble [in, out] knot [ ] (-∞,∞)
knot vector, where size = number of control points + order of curve.
SFInt32 [in, out] order 3 (2,∞)
Define order of surface by polynomials of degree = order-1.
MFDouble [in, out] weight [ ] (-∞,∞)
Output values for linear interpolation, each corresponding to knots.
- Number of weights must match number of knots!
SFVec3f [out] value_changed
Linearly interpolated output value determined by current key time and corresponding keyValue pair.
- The SFNode controlPoints field can contain a single Coordinate or CoordinateDouble node.