SoNurbsCurve(3iv)

1SoNurbsCurve(3IV)()                                        SoNurbsCurve(3IV)()
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NAME

6       SoNurbsCurve — NURBS curve shape node
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INHERITS FROM

9       SoBase > SoFieldContainer > SoNode > SoShape > SoNurbsCurve
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SYNOPSIS

12       #include <Inventor/nodes/SoNurbsCurve.h>
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14          Fields from class SoNurbsCurve:
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16     SoSFInt32           numControlPoints
17     SoMFFloat           knotVector
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19          Methods from class SoNurbsCurve:
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21                         SoNurbsCurve()
22     static SoType       getClassTypeId()
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24          Methods from class SoNode:
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26     void                setOverride(SbBool state)
27     SbBool              isOverride() const
28     SoNode *            copy(SbBool copyConnections = FALSE) const
29     virtual SbBool      affectsState() const
30     static SoNode *     getByName(const SbName &name)
31     static int          getByName(const SbName &name, SoNodeList &list)
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33          Methods from class SoFieldContainer:
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35     void                setToDefaults()
36     SbBool              hasDefaultValues() const
37     SbBool              fieldsAreEqual(const SoFieldContainer *fc) const
38     void                copyFieldValues(const  SoFieldContainer  *fc,  SbBool
39                              copyConnections = FALSE)
40     SbBool              set(const char *fieldDataString)
41     void                get(SbString &fieldDataString)
42     virtual int         getFields(SoFieldList &resultList) const
43     virtual SoField *   getField(const SbName &fieldName) const
44     SbBool              getFieldName(const SoField *field, SbName &fieldName)
45                              const
46     SbBool              isNotifyEnabled() const
47     SbBool              enableNotify(SbBool flag)
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49          Methods from class SoBase:
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51     void                ref()
52     void                unref() const
53     void                unrefNoDelete() const
54     void                touch()
55     virtual SoType      getTypeId() const
56     SbBool              isOfType(SoType type) const
57     virtual void        setName(const SbName &name)
58     virtual SbName      getName() const
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DESCRIPTION

62       This  class  represents a NURBS curve, based on the knot vector and the
63       control points that you  specify.  The  knotVector  field  specifies  a
64       floating-point  array  of values; the values are the coordinates of the
65       knot points in the curve, and you must  enter  them  in  non-decreasing
66       order. The curve will use the first numControlPoints values in the cur‐
67       rent coordinates as control points.
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69       If you specify n knots, you can specify up to n-8 control points.   The
70       number  of  knots  minus  the  number of control points is known as the
71       order of the curve. A NURBS curve can have an order of up to 8.
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73       The control points of the curve are transformed by the  current  trans‐
74       formation  matrix.  The  curve is drawn with the current lighting model
75       and drawing style (drawing style FILLED is treated as LINES). The coor‐
76       dinates,  normals,  and texture coordinates of a NURBS curve are gener‐
77       ated, so you cannot bind explicit normals or texture coordinates  to  a
78       NURBS curve.
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80       The approximation of the curve by line segments is affected by the cur‐
81       rent complexity value.
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FIELDS

84     SoSFInt32           numControlPoints
85          Number of control points.
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87     SoMFFloat           knotVector
88          The knot vector.
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METHODS

92                         SoNurbsCurve()
93          Creates a NURBS curve node with default settings.
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95     static SoType       getClassTypeId()
96          Returns type identifier for this class.
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ACTION BEHAVIOR

100       SoGLRenderAction
101          Draws the curve based on the current coordinates, material,  and  so
102          on.
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104     SoRayPickAction
105          Picks the curve based on the current coordinates and transformation.
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107     SoGetBoundingBoxAction
108          Computes  the  bounding  box that encloses all control points of the
109          curve with the current transformation applied to them. Sets the cen‐
110          ter to the average of the control points.
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112     SoCallbackAction
113          If  any  line segment callbacks are registered with the action, they
114          will be invoked for each successive segment approximating the curve.
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FILE FORMAT/DEFAULTS

118       NurbsCurve {
119          numControlPoints  0
120          knotVector        0
121     }
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