Provided by: libcoin80-doc_3.1.4~abc9f50-4ubuntu2_all 
NAME
SoPointSet -
The SoPointSet class is used to display a set of 3D points.
This node either uses the coordinates currently on the state (typically set up by a leading SoCoordinate3
node in the scenegraph) or from a SoVertexProperty node attached to this node to render a set of 3D
points.
SYNOPSIS
#include <Inventor/nodes/SoPointSet.h>
Inherits SoNonIndexedShape.
Inherited by SoMarkerSet.
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.
SoPointSet (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
Static Public Member Functions
static SoType getClassTypeId (void)
static void initClass (void)
Public Attributes
SoSFInt32 numPoints
Protected Member Functions
virtual const SoFieldData * getFieldData (void) const
virtual ~SoPointSet ()
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er)
virtual SbBool generateDefaultNormals (SoState *, SoNormalCache *nc)
virtual SbBool generateDefaultNormals (SoState *state, SoNormalBundle *bundle)
Static Protected Member Functions
static const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed Description
The SoPointSet class is used to display a set of 3D points.
This node either uses the coordinates currently on the state (typically set up by a leading SoCoordinate3
node in the scenegraph) or from a SoVertexProperty node attached to this node to render a set of 3D
points.
The SoPointSet::numPoints field specifies the number of points in the coordinate set which should be
rendered (or otherwise handled by traversal actions).
Here's a simple usage example of SoPointSet in a scenegraph:
#Inventor V2.1 ascii
Separator {
Material {
diffuseColor [
1 0 0, 0 1 0, 0 0 1, 1 1 0, 1 0 1, 1 1 1, 1 0.8 0.6, 0.6 0.8 1
]
}
MaterialBinding { value PER_PART }
Coordinate3 {
point [
-1 1 0, -1 -1 0, 1 -1 0, 1 1 0, 0 2 -1, -2 0 -1, 0 -2 -1, 2 0 -1
]
}
DrawStyle { pointSize 3 }
PointSet { }
}
FILE FORMAT/DEFAULTS:
PointSet {
vertexProperty NULL
startIndex 0
numPoints -1
}
Constructor & Destructor Documentation
SoPointSet::SoPointSet (void)
Constructor.
SoPointSet::~SoPointSet () [protected], [virtual]
Destructor.
Member Function Documentation
SoType SoPointSet::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.
Reimplemented in SoMarkerSet.
const SoFieldData * SoPointSet::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.
Reimplemented in SoMarkerSet.
void SoPointSet::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.
Reimplemented in SoMarkerSet.
void SoPointSet::getBoundingBox (SoGetBoundingBoxAction *action) [virtual]
Action method for the SoGetBoundingBoxAction.
Calculates bounding box and center coordinates for node and modifies the values of the action to
encompass the bounding box for this node and to shift the center point for the scene more towards the one
for this node.
Nodes influencing how geometry nodes calculates their bounding box also overrides this method to change
the relevant state variables.
Reimplemented from SoShape.
void SoPointSet::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.
Reimplemented in SoMarkerSet.
void SoPointSet::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 SoPointSet::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 SoPointSet::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.
virtual SbBool SoPointSet::generateDefaultNormals (SoState *state, SoNormalBundle *bundle) [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 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.
Member Data Documentation
SoSFInt32 SoPointSet::numPoints
Used to specify number of points in the point set. Coordinates for the points will be taken from the
state stack's set of 3D coordinates, typically set up by a leading SoCoordinate3 node.
If this field is equal to -1 (the default value) all coordinates currently on the state will be rendered
or otherwise handled by traversal actions.
SoPointSet inherits the field SoNonIndexedShape::startIndex, which specifies the start index for points
from the current state set of coordinates. Please note that this field has been obsoleted, but is still
provided for compatibility.
Author
Generated automatically by Doxygen for Coin from the source code.
Version 4.0.0a Wed Feb 26 2014 SoPointSet(3)