Ubuntu Manpage: SoIndexedNurbsSurface — indexed NURBS surface shape node

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NAME

       SoIndexedNurbsSurface — indexed NURBS surface shape node

INHERITS FROM

       SoBase > SoFieldContainer > SoNode > SoShape > SoIndexedNurbsSurface

SYNOPSIS

       #include <Inventor/nodes/SoIndexedNurbsSurface.h>

          Fields from class SoIndexedNurbsSurface:

     SoSFInt32           numUControlPoints
     SoSFInt32           numVControlPoints
     SoMFInt32           coordIndex
     SoMFFloat           uKnotVector
     SoMFFloat           vKnotVector
     SoSFInt32           numSControlPoints
     SoSFInt32           numTControlPoints
     SoMFInt32           textureCoordIndex
     SoMFFloat           sKnotVector
     SoMFFloat           tKnotVector

          Methods from class SoIndexedNurbsSurface:

                         SoIndexedNurbsSurface()
     static SoType       getClassTypeId()

          Methods from class SoNode:

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

          Methods from class SoFieldContainer:

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

          Methods from class SoBase:

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

DESCRIPTION

This shape node represents a NURBS surface based on the knot vectors and the control points that you
specify. The uKnotVector and vKnotVector fields specify floating-point arrays of values; the values are
the coordinates of the knot points in the surface, and you must enter them in non-decreasing order. The
numUControlPoints and numVControlPoints fields specify the number of control points the surface will have
in the U and V parametric directions, and will use the current coordinates that are indexed from the
coordIndex field.

You can get a surface of minimum order (2) in the U or V directions by specifying two more knots than
control points in that direction and having at least two control points in that direction. This surface
would appear creased in one direction.

You can get a surface of maximum order (8) in the U or V directions by specifying eight more knots than
control points in that direction and having at least eight control points in that direction.

The control points of the NURBS surface are transformed by the current cumulative transformation. The
surface is drawn with the current light model and drawing style. The coordinates, normals, and texture
coordinates of a surface are generated, so you cannot bind explicit normals or texture coordinates to a
NURBS surface. The first material in the state is applied to the entire surface.

The surface is trimmed according to the currently defined profiles curves.

When default texture coordinates are applied to a NURBS surface, the edges of the texture square are
stretched to fit the surface. The axes of the texture are called S and T; S is horizontal and T is
vertical. The axes of the NURBS surface are called U and V; U is horizontal and V is vertical. You can
also define texture coordinates explicitly with the S,T location point, the knot vectors, and the current
texture coordinates.

FIELDS

     SoSFInt32           numUControlPoints
     SoSFInt32           numVControlPoints
          Number of control points in the U and V directions.

     SoMFInt32           coordIndex
          Coordinate indices.

     SoMFFloat           uKnotVector
     SoMFFloat           vKnotVector
          The knot vectors in the U and V directions.

     SoSFInt32           numSControlPoints
     SoSFInt32           numTControlPoints
          Number of control points in the S and T directions.

     SoMFInt32           textureCoordIndex
          Texture coordinate indices.

     SoMFFloat           sKnotVector
     SoMFFloat           tKnotVector
          The knot vectors in the S and T directions.

METHODS

                         SoIndexedNurbsSurface()
          Creates an indexed NURBS surface node with default settings.

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

ACTION BEHAVIOR

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

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

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

     SoCallbackAction
          If  any  triangle  callbacks  are registered with the action, they will be invoked for each successive
          triangle approximating the surface.

FILE FORMAT/DEFAULTS

       IndexedNurbsSurface {
          numUControlPoints  0
          numVControlPoints  0
          numSControlPoints  0
          numTControlPoints  0
          coordIndex         0
          uKnotVector        0
          vKnotVector        0
          sKnotVector        0
          tKnotVector        0
          textureCoordIndex  -1
     }