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
SoPointSet (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
Static Public Member Functions
static void initClass (void)
Public Attributes
SoSFInt32 numPoints
Protected Member Functions
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)
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 { }
}
.fi
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
void SoPointSet::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.
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 &
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 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.
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.