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/*!
  \class SoTransformSeparator SoTransformSeparator.h Inventor/nodes/SoTransformSeparator.h
  \brief The SoTransformSeparator class is a group node preserving the current transformations.
  \ingroup nodes

  This node works like the SoSeparator group node, except that it only
  stores and restores the current model matrix transformation. Other
  appearance settings, like materials, textures, cameras, lights, etc,
  will affect the remaining parts of the scenegraph after traversal,
  just like as for the SoGroup node.

  <b>FILE FORMAT/DEFAULTS:</b>
  \code
    TransformSeparator {
    }
  \endcode

  \sa SoSeparator, SoGroup
*/

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

#include <Inventor/nodes/SoTransformSeparator.h>
#include <Inventor/nodes/SoSubNodeP.h>

#include <Inventor/actions/SoGetMatrixAction.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoGetBoundingBoxAction.h>
#include <Inventor/actions/SoCallbackAction.h>
#include <Inventor/actions/SoPickAction.h>
#include <Inventor/actions/SoAudioRenderAction.h>
#include <Inventor/elements/SoBBoxModelMatrixElement.h>
#include <Inventor/elements/SoGLCacheContextElement.h>
#include <Inventor/misc/SoChildList.h>

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

SO_NODE_SOURCE(SoTransformSeparator);

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

/*!
  Default constructor.
*/
SoTransformSeparator::SoTransformSeparator(void)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoTransformSeparator);
}

/*!
  Constructor.

  The argument should be the approximate number of children which is
  expected to be inserted below this node. The number need not be
  exact, as it is only used as a hint for better memory resource
  allocation.
*/
SoTransformSeparator::SoTransformSeparator(int nChildren)
  : inherited(nChildren)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoTransformSeparator);
}

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

// Documented in superclass.
void
SoTransformSeparator::initClass(void)
{
  SO_NODE_INTERNAL_INIT_CLASS(SoTransformSeparator, SO_FROM_INVENTOR_1);
}

// Documented in superclass.
void
SoTransformSeparator::getBoundingBox(SoGetBoundingBoxAction * action)
{
  SbMatrix matrix, localMatrix;
  SoBBoxModelMatrixElement::pushMatrix(action->getState(),
                                       matrix,
                                       localMatrix);
  inherited::getBoundingBox(action);
  SoBBoxModelMatrixElement::popMatrix(action->getState(),
                                      matrix,
                                      localMatrix);
}

// Documented in superclass.
void
SoTransformSeparator::doAction(SoAction *action)
{
  SbMatrix matrix = SoModelMatrixElement::pushMatrix(action->getState());
  inherited::doAction(action);
  SoModelMatrixElement::popMatrix(action->getState(), matrix);
}

// Documented in superclass.
void
SoTransformSeparator::callback(SoCallbackAction * action)
{
  SbMatrix matrix = SoModelMatrixElement::pushMatrix(action->getState());
  inherited::callback(action);
  SoModelMatrixElement::popMatrix(action->getState(), matrix);
}

// Documented in superclass.
void
SoTransformSeparator::GLRender(SoGLRenderAction * action)
{
  SbMatrix matrix = SoModelMatrixElement::pushMatrix(action->getState());
  inherited::GLRender(action);
  SoModelMatrixElement::popMatrix(action->getState(), matrix);
  SoGLCacheContextElement::shouldAutoCache(action->getState(),
                                           SoGLCacheContextElement::DONT_AUTO_CACHE);
}

// Documented in superclass.
void
SoTransformSeparator::pick(SoPickAction * action)
{
  SbMatrix matrix = SoModelMatrixElement::pushMatrix(action->getState());
  inherited::pick(action);
  SoModelMatrixElement::popMatrix(action->getState(), matrix);
}

// Documented in superclass.
void
SoTransformSeparator::getMatrix(SoGetMatrixAction * action)
{
  // Will only need to traverse if IN_PATH. Other path codes will have
  // no effect on the result.
  int numindices;
  const int * indices;
  if (action->getPathCode(numindices, indices) == SoAction::IN_PATH) {
    this->children->traverseInPath(action, numindices, indices);
  }
}

// Documented in superclass.
void
SoTransformSeparator::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
  // FIXME: this looks mysterious -- doesn't we implicitly assume
  // SoGroup::getPrimitiveCount() here? If so, that shouldn't be
  // necessary. Ask pederb. 20020107 mortene.
  SoTransformSeparator::doAction((SoAction *)action);
}

// Documented in superclass.
void
SoTransformSeparator::audioRender(SoAudioRenderAction * action)
{
  SbMatrix matrix = SoModelMatrixElement::pushMatrix(action->getState());
  inherited::audioRender(action);
  SoModelMatrixElement::popMatrix(action->getState(), matrix);
}