SoIndexedNurbsCurve(3iv)

1SoIndexedNurbsCurve(3IV)()                          SoIndexedNurbsCurve(3IV)()
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NAME

6       SoIndexedNurbsCurve — indexed NURBS curve shape node
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INHERITS FROM

9       SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsCurve
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SYNOPSIS

12       #include <Inventor/nodes/SoIndexedNurbsCurve.h>
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14          Fields from class SoIndexedNurbsCurve:
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16     SoSFInt32           numControlPoints
17     SoMFInt32           coordIndex
18     SoMFFloat           knotVector
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20          Methods from class SoIndexedNurbsCurve:
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22                         SoIndexedNurbsCurve()
23     static SoType       getClassTypeId()
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25          Methods from class SoNode:
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27     void                setOverride(SbBool state)
28     SbBool              isOverride() const
29     SoNode *            copy(SbBool copyConnections = FALSE) const
30     virtual SbBool      affectsState() const
31     static SoNode *     getByName(const SbName &name)
32     static int          getByName(const SbName &name, SoNodeList &list)
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34          Methods from class SoFieldContainer:
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36     void                setToDefaults()
37     SbBool              hasDefaultValues() const
38     SbBool              fieldsAreEqual(const SoFieldContainer *fc) const
39     void                copyFieldValues(const  SoFieldContainer  *fc,  SbBool
40                              copyConnections = FALSE)
41     SbBool              set(const char *fieldDataString)
42     void                get(SbString &fieldDataString)
43     virtual int         getFields(SoFieldList &resultList) const
44     virtual SoField *   getField(const SbName &fieldName) const
45     SbBool              getFieldName(const SoField *field, SbName &fieldName)
46                              const
47     SbBool              isNotifyEnabled() const
48     SbBool              enableNotify(SbBool flag)
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50          Methods from class SoBase:
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52     void                ref()
53     void                unref() const
54     void                unrefNoDelete() const
55     void                touch()
56     virtual SoType      getTypeId() const
57     SbBool              isOfType(SoType type) const
58     virtual void        setName(const SbName &name)
59     virtual SbName      getName() const
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DESCRIPTION

63       This  class  represents  a NURBS curve based on the knot vector and the
64       control points that you  specify.  The  knotVector  field  specifies  a
65       floating-point  array  of values; the values are the coordinates of the
66       knot points in the curve, and you must  enter  them  in  non-decreasing
67       order.  The  numControlPoints  field  specifies  the  number of control
68       points the curve will have and will use the  current  coordinates  that
69       are indexed from the coordIndex field.
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71       You  can  get a curve of minimum order (2) by specifying two more knots
72       than control points and having at least two control points. This  curve
73       would be a set of line segments connecting the control points together.
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75       You  can  get  a  curve of maximum order (8) by specifying 8 more knots
76       than control points and having at  least  8  control  points.  In  this
77       curve,  each  control point would have influence on a larger portion of
78       the curve than with curves of lesser order.
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80       The control points of the curve are transformed by the  current  trans‐
81       formation  matrix.  The  curve is drawn with the current lighting model
82       and drawing style (drawing style FILLED is treated as LINES). The coor‐
83       dinates,  normals,  and texture coordinates of a NURBS curve are gener‐
84       ated, so you cannot bind explicit normals or texture coordinates  to  a
85       NURBS curve.
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87       The approximation of the curve by line segments is affected by the cur‐
88       rent complexity value.
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FIELDS

91     SoSFInt32           numControlPoints
92          Number of control points for the curve.
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94     SoMFInt32           coordIndex
95          Coordinate indices for the control points.
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97     SoMFFloat           knotVector
98          The knot vector for the curve.  Values  must  be  in  non-decreasing
99          order.
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METHODS

103                         SoIndexedNurbsCurve()
104          Creates an indexed NURBS curve node with default settings.
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106     static SoType       getClassTypeId()
107          Returns type identifier for this class.
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ACTION BEHAVIOR

111       SoGLRenderAction
112          Draws  the  curve based on the current coordinates, material, and so
113          on.
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115     SoRayPickAction
116          Picks the curve based on the current coordinates and transformation.
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118     SoGetBoundingBoxAction
119          Computes the bounding box that encloses all control  points  of  the
120          curve with the current transformation applied to them. Sets the cen‐
121          ter to the average of the control points.
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123     SoCallbackAction
124          If any line segment callbacks are registered with the  action,  they
125          will be invoked for each successive segment approximating the curve.
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FILE FORMAT/DEFAULTS

129       IndexedNurbsCurve {
130          numControlPoints  0
131          coordIndex        0
132          knotVector        0
133     }
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