SoNurbsCurve — NURBS curve shape node
Contents
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.
Description
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 curve will use the first
numControlPoints values in the current coordinates as control points.
If you specify n knots, you can specify up to n-8 control points. The number of knots minus the number
of control points is known as the order of the curve. A NURBS curve can have an order of up to 8.
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.
Fields
SoSFInt32numControlPoints
Number of control points.
SoMFFloatknotVector
The knot vector.
File Format/Defaults
NurbsCurve{numControlPoints0knotVector0}Inherits From
SoBase > SoFieldContainer > SoNode > SoShape > SoNurbsCurve
Methods
SoNurbsCurve()
Creates a NURBS curve node with default settings.
staticSoTypegetClassTypeId()
Returns type identifier for this class.
Name
SoNurbsCurve — NURBS curve shape node
See Also
SoIndexedNurbsCurve,SoNurbsSurfaceSoNurbsCurve(3IV)()
Synopsis
#include<Inventor/nodes/SoNurbsCurve.h>
Fields from class SoNurbsCurve:
SoSFInt32numControlPointsSoMFFloatknotVector
Methods from class SoNurbsCurve:
SoNurbsCurve()staticSoTypegetClassTypeId()
Methods from class SoNode:
voidsetOverride(SbBoolstate)SbBoolisOverride()constSoNode*copy(SbBoolcopyConnections=FALSE)constvirtualSbBoolaffectsState()conststaticSoNode*getByName(constSbName&name)staticintgetByName(constSbName&name,SoNodeList&list)
Methods from class SoFieldContainer:
voidsetToDefaults()SbBoolhasDefaultValues()constSbBoolfieldsAreEqual(constSoFieldContainer*fc)constvoidcopyFieldValues(constSoFieldContainer*fc,SbBoolcopyConnections=FALSE)SbBoolset(constchar*fieldDataString)voidget(SbString&fieldDataString)virtualintgetFields(SoFieldList&resultList)constvirtualSoField*getField(constSbName&fieldName)constSbBoolgetFieldName(constSoField*field,SbName&fieldName)constSbBoolisNotifyEnabled()constSbBoolenableNotify(SbBoolflag)
Methods from class SoBase:
voidref()voidunref()constvoidunrefNoDelete()constvoidtouch()virtualSoTypegetTypeId()constSbBoolisOfType(SoTypetype)constvirtualvoidsetName(constSbName&name)virtualSbNamegetName()const