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
SoFaceSet (void)
virtual void GLRender (SoGLRenderAction *action)
virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle
*nb)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
Static Public Member Functions
static void initClass (void)
Public Attributes
SoMFInt32 numVertices
Protected Member Functions
virtual ~SoFaceSet ()
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f
¢er)
virtual SbBool generateDefaultNormals (SoState *, SoNormalCache *)
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
void SoFaceSet::initClass (void) [static] Sets up initialization for data
common to all instances of this class, like submitting necessary
information to the Coin type system.
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 &
center) [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
Generated automatically by Doxygen for Coin from the source code.