SoFaceSet(3IV)

NAME
     SoFaceSet - polygonal face shape node

INHERITS FROM
     SoBase > SoFieldContainer > SoNode > SoShape > SoVertexShape >
     SoNonIndexedShape > SoFaceSet

SYNOPSIS
     #include <Inventor/nodes/SoFaceSet.h>

          Fields from class SoFaceSet:

     SoMFInt32           numVertices

          Fields from class SoNonIndexedShape:

     SoSFInt32           startIndex

          Fields from class SoVertexShape:

     SoSFNode            vertexProperty

          Methods from class SoFaceSet:

                         SoFaceSet()
     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 node represents a 3D shape formed by constructing faces (polygons)
     from vertices located at the coordinates specified in the vertexProperty
     field (from SoVertexShape), or the current inherited state. For optimal
     performance, the vertexProperty field is recommended.

     SoFaceSet uses the coordinates in order, starting with the first one.
     Each face has a number of vertices specified by a value in the
     numVertices field. For example, an SoFaceSet with numVertices of [3,4,4]
     would use coordinates 1, 2, and 3 for the first face, coordinates 4, 5,
     6, and 7 for the second face, and coordinates 8, 9, 10, and 11 for the
     third. For improved performance, arrange all the faces with only 3
     vertices at beginning of the list, then all faces with 4 vertices, and
     finally all other faces.

     The number of values in the numVertices field indicates the number of
     faces in the set.

     The coordinates of the face set are transformed by the current cumulative
     transformation. The faces are drawn with the current light model and
     drawing style.

     Treatment of the current material and normal binding is as follows: The
     PER_PART and PER_FACE bindings specify a material or normal for each
     face. The _INDEXED bindings are equivalent to their non-indexed
     counterparts. The default material binding is OVERALL. The default normal
     binding is PER_VERTEX.

     If any normals (or materials) are specified, Inventor assumes you provide
     the correct number of them, as indicated by the binding. You will see
     unexpected results if you specify fewer normals (or materials) than the
     shape requires. If no normals are specified, they will be generated
     automatically.

FIELDS
     SoMFInt32           numVertices
          Number of vertices per face.

METHODS
                         SoFaceSet()
          Creates a face set node with default settings.

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


ACTION BEHAVIOR
     SoGLRenderAction
          Draws faces based on the current coordinates, normals, materials,
          drawing style, and so on.

     SoRayPickAction
          Picks faces based on the current coordinates and transformation.
          Details about the intersection are returned in an SoFaceDetail.

     SoGetBoundingBoxAction
          Computes the bounding box that encloses all vertices of the face set
          with the current transformation applied to them. Sets the center to
          the average of the coordinates of all vertices.

     SoCallbackAction
          If any triangle callbacks are registered with the action, they will
          be invoked for each successive triangle generated from each face in
          the set.


FILE FORMAT/DEFAULTS
     FaceSet {
          vertexProperty  NULL
          startIndex      0
          numVertices     -1
     }

SEE ALSO
     SoCoordinate3, SoDrawStyle, SoIndexedFaceSet, SoFaceDetail,
     SoVertexProperty