Provided by: libcoin80-doc_3.1.4~abc9f50-4ubuntu2_all 
NAME
SoFaceSet -
The SoFaceSet class is used to render and organize non-indexed polygonal face data.
Faces are specified using the numVertices field. Coordinates, normals, materials and
texture coordinates are fetched in order from the current state or from the vertexProperty
node if set. For example, if numVertices is set to [3, 4, 5, 3], this node would specify a
triangle from coordinates 0, 1 and 2, a quad from coordinates 3, 4, 5 and 6, a polygon
from coordinates 7, 8, 9, 10 and 11 and finally a triangle from coordinates 12, 13, 14.
SYNOPSIS
#include <Inventor/nodes/SoFaceSet.h>
Inherits SoNonIndexedShape.
Public Member Functions
virtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase.
This is used for run-time type checking and 'downward' casting.
SoFaceSet (void)
virtual void GLRender (SoGLRenderAction *action)
virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle *nb)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
Static Public Member Functions
static SoType getClassTypeId (void)
static void initClass (void)
Public Attributes
SoMFInt32 numVertices
Protected Member Functions
virtual const SoFieldData * getFieldData (void) const
virtual ~SoFaceSet ()
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er)
virtual SbBool generateDefaultNormals (SoState *, SoNormalCache *)
Static Protected Member Functions
static const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed Description
The SoFaceSet class is used to render and organize non-indexed polygonal face data.
Faces are specified using the numVertices field. Coordinates, normals, materials and
texture coordinates are fetched in order from the current state or from the vertexProperty
node if set. For example, if numVertices is set to [3, 4, 5, 3], this node would specify a
triangle from coordinates 0, 1 and 2, a quad from coordinates 3, 4, 5 and 6, a polygon
from coordinates 7, 8, 9, 10 and 11 and finally a triangle from coordinates 12, 13, 14.
Binding PER_VERTEX, PER_FACE or OVERALL can be set for material, and normals. The default
material binding is OVERALL. The default normal binding is PER_VERTEX.
For more elaborate documentation about face sets, see the class documentation of the
SoIndexedFaceSet node, which contains examples and more detailed information about various
issues also relevant for this node.
FILE FORMAT/DEFAULTS:
FaceSet {
vertexProperty NULL
startIndex 0
numVertices -1
}
See Also:
SoIndexedFaceSet, SoIndexedTriangleStripSet
Constructor & Destructor Documentation
SoFaceSet::SoFaceSet (void)
Constructor.
SoFaceSet::~SoFaceSet () [protected], [virtual]
Destructor.
Member Function Documentation
SoType SoFaceSet::getTypeId (void) const [virtual]
Returns the type identification of an object derived from a class inheriting SoBase. This
is used for run-time type checking and 'downward' casting. Usage example:
void foo(SoNode * node)
{
if (node->getTypeId() == SoFile::getClassTypeId()) {
SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type
}
}
For application programmers wanting to extend the library with new nodes, engines,
nodekits, draggers or others: this method needs to be overridden in all subclasses. This
is typically done as part of setting up the full type system for extension classes, which
is usually accomplished by using the pre-defined macros available through for instance
Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes),
Inventor/engines/SoSubEngine.h (for engine classes) and so on.
For more information on writing Coin extensions, see the class documentation of the
toplevel superclasses for the various class groups.
Reimplemented from SoNonIndexedShape.
const SoFieldData * SoFaceSet::getFieldData (void) const [protected], [virtual]
Returns a pointer to the class-wide field data storage object for this instance. If no
fields are present, returns NULL.
Reimplemented from SoNonIndexedShape.
void SoFaceSet::GLRender (SoGLRenderAction *action) [virtual]
Action method for the SoGLRenderAction.
This is called during rendering traversals. Nodes influencing the rendering state in any
way or who wants to throw geometry primitives at OpenGL overrides this method.
Reimplemented from SoShape.
SbBool SoFaceSet::generateDefaultNormals (SoState *state, SoNormalBundle *bundle) [virtual]
This API member is considered internal to the library, as it is not likely to be of
interest to the application programmer.
Subclasses should override this method to generate default normals using the
SoNormalBundle class. TRUE should be returned if normals were generated, FALSE otherwise.
Default method returns FALSE.
This function is an extension for Coin, and it is not available in the original SGI Open
Inventor v2.1 API.
Reimplemented from SoVertexShape.
void SoFaceSet::getPrimitiveCount (SoGetPrimitiveCountAction *action) [virtual]
Action method for the SoGetPrimitiveCountAction.
Calculates the number of triangle, line segment and point primitives for the node and adds
these to the counters of the action.
Nodes influencing how geometry nodes calculates their primitive count also overrides this
method to change the relevant state variables.
Reimplemented from SoShape.
void SoFaceSet::generatePrimitives (SoAction *action) [protected], [virtual]
The method implements action behavior for shape nodes for SoCallbackAction. It is invoked
from SoShape::callback(). (Subclasses should not override SoNode::callback().)
The subclass implementations uses the convenience methods SoShape::beginShape(),
SoShape::shapeVertex(), and SoShape::endShape(), with SoDetail instances, to pass the
primitives making up the shape back to the caller.
Implements SoShape.
void SoFaceSet::computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er) [protected],
[virtual]
Implemented by SoShape subclasses to let the SoShape superclass know the exact size and
weighted center point of the shape's bounding box.
The bounding box and center point should be calculated and returned in the local
coordinate system.
The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is
invoked from SoShape::getBoundingBox(). (Subclasses should not override
SoNode::getBoundingBox().)
The box parameter sent in is guaranteed to be an empty box, while center is undefined upon
function entry.
Implements SoShape.
SbBool SoFaceSet::generateDefaultNormals (SoState *state, SoNormalCache *cache) [protected],
[virtual]
This API member is considered internal to the library, as it is not likely to be of
interest to the application programmer.
Subclasses should override this method to generate default normals using the SoNormalCache
class. This is more effective than using SoNormalGenerator. Return TRUE if normals were
generated, FALSE otherwise.
Default method just returns FALSE.
This function is an extension for Coin, and it is not available in the original SGI Open
Inventor v2.1 API.
Reimplemented from SoVertexShape.
Member Data Documentation
SoMFInt32 SoFaceSet::numVertices
Used to specify faces. Each entry specifies the number of coordinates in a face. The
coordinates are taken in order from the state or from the vertexProperty node.
Author
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