Ubuntu Manpage: SoVertexProperty — vertex property node

Provided by: inventor-doc_2.1.5-10-18_all

NAME

       SoVertexProperty — vertex property node

INHERITS FROM

       SoBase > SoFieldContainer > SoNode > SoVertexProperty

SYNOPSIS

       #include <Inventor/nodes/SoVertexProperty.h>

     enum Binding {
          SoVertexProperty::OVERALL   Whole object has same material/normal
          SoVertexProperty::PER_PART  One material/normal for each part of object
          SoVertexProperty::PER_PART_INDEXED
                                      One material/normal for each part, indexed
          SoVertexProperty::PER_FACE  One material/normal for each face of object
          SoVertexProperty::PER_FACE_INDEXED
                                      One material/normal for each face, indexed
          SoVertexProperty::PER_VERTEX
                                      One material/normal for each vertex of object
          SoVertexProperty::PER_VERTEX_INDEXED
                                      One material/normal for each vertex, indexed
     }

          Fields from class SoVertexProperty:

     SoMFVec3f           vertex
     SoMFVec3f           normal
     SoMFUInt32          orderedRGBA
     SoMFVec2f           texCoord
     SoSFEnum            normalBinding
     SoSFEnum            materialBinding

          Methods from class SoVertexProperty:

                         SoVertexProperty()

          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)
     static SoType       getClassTypeId()

          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 property node may be used to efficiently specify coordinates, normals, texture
coordinates, colors, transparency values, material binding and normal binding for vertex-
based shapes, i.e., shapes of class SoVertexShape. An SoVertexProperty node can be used as
a child of a group node in a scene graph, in which case the properties it specifies are
inherited by subsequent shape nodes in the graph. It can also be directly referenced as
the VertexProperty SoSFField of a vertex-based shape, bypassing scene graph inheritance.

When directly referenced by a VertexProperty SoSFField of a vertex-based shape, the
SoVertexProperty node is the most efficient way of specifying vertex-based shapes. Use of
the directly referenced SoVertexProperty node results in significantly faster scene
rendering than scene graph inheritance of vertex properties, provided all required vertex
properties are specified in the SoVertexProperty node.

Because the class SoVertexProperty is derived from SoNode, a vertex property node can be
inserted as a child node in a scene graph. When inserted as a node in a scene graph, the
SoVertexProperty node is traversed as any other property node and the properties it
specifies are inherited by subsequent shape nodes in the scene graph. It specifies the
current material and normal bindings, and can be used to specify the current 3D
coordinates, the current normals, the current texture coordinates, the current diffuse
colors, and the current transparencies.

All multiple-valued fields in the SoVertexProperty node are optional. If a field is not
present (i.e. if it has 0 values), then shapes that require the missing information are
required to obtain it from the current traversal state. However, users are cautioned that,
for optimal performance, the vertex property node should be referenced as the
VertexProperty field of an SoVertexShape, and should specify in its fields all values
required to render that shape.

The various fields in a vertex property node can be used in place of corresponding fields
in other property nodes, as follows: The vertex field contains 3D coordinates, as in the
point field of an SoCoordinate3 node. The normal field contains normal vectors, as in the
vector field of the SoNormal node. The orderedRGBA field contains packed colors in the
hexadecimal format 0xrrggbbaa, where rr is the red value (between 00 and 0xFF hex) gg is
the green value (between 00 and 0xFF hex) bb is the blue value (between 00 and 0xFF hex)
aa is the alpha value (between 00 = transparent and 0xFF = opaque). The packed colors are
equivalent to an SoPackedColor node, and provide values for both diffuse color and
transparency. The texCoord field replaces the point field of the SoTextureCoordinate2
node.

If the transparency type is SoGLRenderAction::SCREEN_DOOR, only the first transparency
value will be used. With other transparency types, multiple transparencies will be used.

The materialBinding field replaces the value field of the SoMaterialBinding node. The
materialBinding field in a directly referenced SoVertexProperty node has no effect unless
there is a nonempty orderedRGBA field, in which case the material binding specifies the
assignment of diffuse colors and alpha values to the shape. The materialBinding field can
take as value any of the material bindings supported by Inventor.

The normalBinding field replaces the value field of the SoNormalBinding node. The
normalBinding field of a directly referenced SoVertexProperty node has no effect unless
there is a nonempty normal field, in which case the normal binding specifies the
assignment of normal vectors to the shape. The value of the normalBinding field can be any
of the normal bindings supported by Inventor.

FIELDS

     SoMFVec3f           vertex
          vertex coordinate(s).

     SoMFVec3f           normal
          normal vector(s).

     SoMFUInt32          orderedRGBA
          packed color(s), including transparencies.

     SoMFVec2f           texCoord
          texture coordinate(s).

     SoSFEnum            normalBinding
          normal binding.

     SoSFEnum            materialBinding
          material binding.

METHODS

                         SoVertexProperty()
          Creates an SoVertexProperty node with default settings.

ACTION BEHAVIOR

       SoGLRenderAction, SoCallbackAction, SoPickAction
          When traversed in a  scene  graph,  sets  coordinates,  normals,  texture  coordinates,
          diffuse  colors, transparency, normal binding and material binding in current traversal
          state. If not traversed, has no effect  on  current  traversal  state  associated  with
          action.   The  normalBinding  field  has  no  effect  if  there  are  no  normals.  The
          materialBinding has no effect if there are no packed colors.

     SoGetBoundingBoxAction
          When traversed in a scene graph, sets coordinates in current traversal  state.  If  not
          traversed, has no effect on current traversal state associated with action.

FILE FORMAT/DEFAULTS

       VertexProperty {
          vertex           [  ]
          normal           [  ]
          texCoord         [  ]
          orderedRGBA      [  ]
          materialBinding  OVERALL
          normalBinding    PER_VERTEX_INDEXED
     }