Source

Coin / src / nodes / SoMatrixTransform.cpp

Full commit
/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

/*!
  \class SoMatrixTransform SoMatrixTransform.h Inventor/nodes/SoMatrixTransform.h
  \brief The SoMatrixTransform class is a transformation node.
  \ingroup nodes

  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.

  <b>FILE FORMAT/DEFAULTS:</b>
  \code
    MatrixTransform {
        matrix 1 0 0 0
  0 1 0 0
  0 0 1 0
  0 0 0 1
    }
  \endcode

  \sa SoTransform
*/

// *************************************************************************

#include <Inventor/nodes/SoMatrixTransform.h>

#include <Inventor/actions/SoGetMatrixAction.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/elements/SoModelMatrixElement.h>

#include "nodes/SoSubNodeP.h"

// *************************************************************************

/*!
  \var SoSFMatrix SoMatrixTransform::matrix
  The transformation matrix. Defaults to the identity matrix.
*/

// *************************************************************************

SO_NODE_SOURCE(SoMatrixTransform);

/*!
  Constructor.
*/
SoMatrixTransform::SoMatrixTransform(void)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoMatrixTransform);

  SO_NODE_ADD_FIELD(matrix, (SbMatrix::identity()));
}

/*!
  Destructor.
*/
SoMatrixTransform::~SoMatrixTransform()
{
}

// Doc from superclass.
void
SoMatrixTransform::initClass(void)
{
  SO_NODE_INTERNAL_INIT_CLASS(SoMatrixTransform, SO_FROM_INVENTOR_1|SoNode::VRML1);
}

// Doc from superclass.
void
SoMatrixTransform::doAction(SoAction * action)
{
  if (this->matrix.isIgnored()) { return; }

  const SbMatrix & mat = this->matrix.getValue();
  if (mat != SbMatrix::identity()) {
    SoModelMatrixElement::mult(action->getState(), this,
                               mat);
  }
}

// Doc from superclass.
void
SoMatrixTransform::GLRender(SoGLRenderAction * action)
{
  SoMatrixTransform::doAction((SoAction *)action);
}

// Doc from superclass.
void
SoMatrixTransform::getBoundingBox(SoGetBoundingBoxAction * action)
{
  SoMatrixTransform::doAction((SoAction *)action);
}

// Doc from superclass.
void
SoMatrixTransform::callback(SoCallbackAction * action)
{
  SoMatrixTransform::doAction((SoAction *)action);
}

// Doc from superclass.
void
SoMatrixTransform::getMatrix(SoGetMatrixAction * action)
{
  if (this->matrix.isIgnored()) { return; }

  SbMatrix m = this->matrix.getValue();
  action->getMatrix().multLeft(m);

  SbMatrix mi = m.inverse();
  action->getInverse().multRight(mi);
}

// Doc from superclass.
void
SoMatrixTransform::pick(SoPickAction * action)
{
  SoMatrixTransform::doAction((SoAction *)action);
}

// Doc from superclass. Overrides the traversal method in this class for
// the SoGetPrimitiveCountAction because the number of primitives can
// be different depending on scene location (and thereby distance to
// camera) if there are e.g. SoLOD nodes in the scene.
void
SoMatrixTransform::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
  SoMatrixTransform::doAction((SoAction *)action);
}