NAME
SoScale -
The SoScale class is a node type for scaling scene graph geometry.
Use nodes of this type to apply scaling operations during scenegraph
traversals for e.g. rendering. Scale values are specified in a triple-
value vector, with one scale factor for each of the 3 principal axes.
SYNOPSIS
#include <Inventor/nodes/SoScale.h>
Inherits SoTransformation.
Public Member Functions
SoScale (void)
virtual void doAction (SoAction *action)
virtual void callback (SoCallbackAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void pick (SoPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
Static Public Member Functions
static void initClass (void)
Public Attributes
SoSFVec3f scaleFactor
Protected Member Functions
virtual ~SoScale ()
Detailed Description
The SoScale class is a node type for scaling scene graph geometry.
Use nodes of this type to apply scaling operations during scenegraph
traversals for e.g. rendering. Scale values are specified in a triple-
value vector, with one scale factor for each of the 3 principal axes.
FILE FORMAT/DEFAULTS:
Scale {
scaleFactor 1 1 1
}
Constructor & Destructor Documentation
SoScale::SoScale (void) Constructor.
SoScale::~SoScale () [protected, virtual] Destructor.
Member Function Documentation
void SoScale::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 SoTransformation.
void SoScale::doAction (SoAction * action) [virtual] This function performs
the typical operation of a node for any action.
Reimplemented from SoNode.
void SoScale::callback (SoCallbackAction * action) [virtual] Action method
for SoCallbackAction.
Simply updates the state according to how the node behaves for the
render action, so the application programmer can use the
SoCallbackAction for extracting information about the scene graph.
Reimplemented from SoNode.
void SoScale::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 SoNode.
void SoScale::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 SoNode.
void SoScale::getMatrix (SoGetMatrixAction * action) [virtual] Action
method for SoGetMatrixAction.
Updates action by accumulating with the transformation matrix of this
node (if any).
Reimplemented from SoNode.
void SoScale::pick (SoPickAction * action) [virtual] Action method for
SoPickAction.
Does common processing for SoPickAction action instances.
Reimplemented from SoNode.
void SoScale::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 SoNode.
Member Data Documentation
SoSFVec3f SoScale::scaleFactor Specifies scaling along the 3 axes.
To get a uniform scale applied to the affected shapes, set the
scaleFactor field to a vector with the same value for all components.
A common error when doing non-uniform scaling in a single direction is
to set the value for the other two components of the scaleFactor vector
to 0. This is obviously wrong, they should be set to 1 to not scale the
shape(s) in the other two directions.
Be careful with setting scaleFactor component values to 0 or to
negative values. Most shapes should handle those cases somehow, but the
results are undefined unless otherwise specified.
The default value of this vector field is [1.0, 1.0, 1.0].
Author
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