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Man Pages


Manual Reference Pages  -  SOINDEXEDNURBSCURVE (3)

NAME

SoIndexedNurbsCurve — indexed NURBS curve shape node

CONTENTS

Inherits From
Synopsis
Description
Fields
Methods
Action Behavior
File Format/defaults
See Also

INHERITS FROM

SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsCurve

SYNOPSIS

#include <Inventor/nodes/SoIndexedNurbsCurve.h>

Fields from class SoIndexedNurbsCurve:

    SoSFInt32    
                    
SoSFInt32            numControlPoints    
SoMFInt32    
                    
SoMFInt32            coordIndex    
SoMFFloat    
                    
SoMFFloat            knotVector

Methods from class SoIndexedNurbsCurve:

       
                    
                     SoIndexedNurbsCurve()    
static SoType    
                    
static SoType        getClassTypeId()

Methods from class SoNode:

    void    
                    
void                 setOverride(SbBool state)    
SbBool    
                    
SbBool               isOverride() const    
SoNode *    
                    
SoNode *             copy(SbBool copyConnections = FALSE) const    
virtual SbBool    
                    
virtual SbBool       affectsState() const    
static SoNode *    
                    
static SoNode *      getByName(const SbName &name)    
static int    
                    
static int           getByName(const SbName &name, SoNodeList &list)

Methods from class SoFieldContainer:

    void    
                    
void                 setToDefaults()    
SbBool    
                    
SbBool               hasDefaultValues() const    
SbBool    
                    
SbBool               fieldsAreEqual(const SoFieldContainer *fc) const    
void    
                    
void                 copyFieldValues(const SoFieldContainer *fc, SbBool copyConnections = FALSE)    
SbBool    
                    
SbBool               set(const char *fieldDataString)    
void    
                    
void                 get(SbString &fieldDataString)    
virtual int    
                    
virtual int          getFields(SoFieldList &resultList) const    
virtual SoField *    
                    
virtual SoField *    getField(const SbName &fieldName) const    
SbBool    
                    
SbBool               getFieldName(const SoField *field, SbName &fieldName) const    
SbBool    
                    
SbBool               isNotifyEnabled() const    
SbBool    
                    
SbBool               enableNotify(SbBool flag)

Methods from class SoBase:

    void    
                    
void                 ref()    
void    
                    
void                 unref() const    
void    
                    
void                 unrefNoDelete() const    
void    
                    
void                 touch()    
virtual SoType    
                    
virtual SoType       getTypeId() const    
SbBool    
                    
SbBool               isOfType(SoType type) const    
virtual void    
                    
virtual void         setName(const SbName &name)    
virtual SbName    
                    
virtual SbName       getName() const

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 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.

FIELDS

    SoSFInt32    
                    
SoSFInt32            numControlPoints
Number of control points for the curve.

    SoMFInt32    
                    
SoMFInt32            coordIndex
Coordinate indices for the control points.

    SoMFFloat    
                    
SoMFFloat            knotVector
The knot vector for the curve. Values must be in non-decreasing order.

METHODS

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

    static SoType    
                    
static SoType        getClassTypeId()
Returns type identifier for this class.

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.

FILE FORMAT/DEFAULTS

IndexedNurbsCurve {



numControlPoints  0
coordIndex        0
knotVector        0


}

SEE ALSO

SoNurbsCurve, SoIndexedNurbsSurface

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