Package com.openinventor.inventor.nodes

Class SoIndexedNurbsCurve

  • All Implemented Interfaces:
    SafeDisposable
    public class SoIndexedNurbsCurve
extends SoNurbsCurve
    Indexed NURBS curve shape node. This class represents a NURBS curve based on the knot vector and the control points that you specify. The knotVector field specifies a floating-point array of values; the values are the coordinates of the knot points in the curve, and you must enter them in non-decreasing order. The numControlPoints field specifies the number of control points the curve will have and will use the current coordinates that are indexed from the coordIndex field.

    You can get a curve of minimum order (2) by specifying two more knots than control points and having at least two control points. This curve would be a set of line segments connecting the control points together.

    You can get a curve of maximum order (8) by specifying 8 more knots than control points and having at least 8 control points. In this curve, each control point would have influence on a larger portion of the curve than with curves of lesser order.

    The control points of the curve are transformed by the current transformation matrix. The curve is drawn with the current lighting model and drawing style (drawing style FILLED is treated as LINES). The coordinates, normals, and texture coordinates of a NURBS curve are generated, so you cannot bind explicit normals or texture coordinates to a NURBS curve.

    The approximation of the curve by line segments is affected by the current complexity value.

    Shape Antialiasing type is SoShape.LINES.

    File format/default:

    IndexedNurbsCurve {

      numControlPoints 0
      coordIndex 0
      knotVector 0
    }

    Action behavior:

    SoGLRenderAction
    Draws the curve based on the current coordinates, material, and so on.

    SoRayPickAction
    Picks the curve based on the current coordinates and transformation.

    SoGetBoundingBoxAction
    Computes the bounding box that encloses all control points of the curve with the current transformation applied to them. Sets the center to the average of the control points.

    SoCallbackAction
    If any line segment callbacks are registered with the action, they will be invoked for each successive segment approximating the curve.

    See Also:
    SoFullSceneAntialiasing, SoNurbsCurve, SoIndexedNurbsSurface

    • Field Detail

      • coordIndex

        public final SoMFInt32 coordIndex
        Coordinate indices for the control points.

    • Constructor Detail

      • SoIndexedNurbsCurve

        public SoIndexedNurbsCurve()
        Creates an indexed NURBS curve node with default settings.