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SoMatrixTransform.3coin2

NAME

SoMatrixTransform -

The SoMatrixTransform class is a transformation node.

This class is the most flexible transformation node, as you can use it to accumulate any kind of transformation matrix on top of the current model transformation matrix.

SYNOPSIS

#include <Inventor/nodes/SoMatrixTransform.h>

Inherits SoTransformation.

Public Member Functions

SoMatrixTransform (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

SoSFMatrix matrix

Protected Member Functions

virtual ~SoMatrixTransform ()

Detailed Description

The SoMatrixTransform class is a transformation node.

This class is the most flexible transformation node, as you can use it to accumulate any kind of transformation matrix on top of the current model transformation matrix.

FILE FORMAT/DEFAULTS:

     MatrixTransform {
         matrix 1 0 0 0
   0 1 0 0
   0 0 1 0
   0 0 0 1
     }
 
 

See also:

SoTransform

Constructor & Destructor Documentation

SoMatrixTransform::SoMatrixTransform (void)Constructor.

References SbMatrix::identity(), and matrix.

SoMatrixTransform::~SoMatrixTransform () [protected, virtual]Destructor.

Member Function Documentation

void SoMatrixTransform::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.

References SoNode::VRML1.

void SoMatrixTransform::doAction (SoAction * action) [virtual]This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

References SoAction::getState(), SbMatrix::identity(), SoField::isIgnored(), and matrix.

Referenced by callback(), getBoundingBox(), getPrimitiveCount(), GLRender(), and pick().

void SoMatrixTransform::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.

References doAction().

void SoMatrixTransform::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.

References doAction().

void SoMatrixTransform::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.

References doAction().

void SoMatrixTransform::getMatrix (SoGetMatrixAction * action) [virtual]Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any).

Reimplemented from SoNode.

References SoGetMatrixAction::getInverse(), SoGetMatrixAction::getMatrix(), SbMatrix::inverse(), SoField::isIgnored(), matrix, SbMatrix::multLeft(), and SbMatrix::multRight().

void SoMatrixTransform::pick (SoPickAction * action) [virtual]Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

References doAction().

void SoMatrixTransform::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.

References doAction().

Member Data Documentation

SoSFMatrix SoMatrixTransform::matrixThe transformation matrix. Defaults to the identity matrix.

Referenced by doAction(), SoCenterballDragger::fieldSensorCB(), getMatrix(), SoDragger::getMotionMatrix(), SoDragger::setMotionMatrix(), SoCenterballDragger::SoCenterballDragger(), SoMatrixTransform(), and SoCenterballDragger::transferCenterDraggerMotion().

Author

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