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/*=========================================================================
Program: Visualization Toolkit
Module: vtkRenderedAreaPicker.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkRenderedAreaPicker.h"
#include "vtkObjectFactory.h"
#include "vtkMapper.h"
#include "vtkAbstractVolumeMapper.h"
#include "vtkImageMapper3D.h"
#include "vtkAbstractMapper3D.h"
#include "vtkProp.h"
#include "vtkLODProp3D.h"
#include "vtkActor.h"
#include "vtkPropCollection.h"
#include "vtkProp3DCollection.h"
#include "vtkAssemblyPath.h"
#include "vtkVolume.h"
#include "vtkRenderer.h"
#include "vtkProperty.h"
#include "vtkCommand.h"
#include "vtkPlanes.h"
#include "vtkPlane.h"
#include "vtkPoints.h"
vtkStandardNewMacro(vtkRenderedAreaPicker);
//--------------------------------------------------------------------------
vtkRenderedAreaPicker::vtkRenderedAreaPicker()
{
}
//--------------------------------------------------------------------------
vtkRenderedAreaPicker::~vtkRenderedAreaPicker()
{
}
//--------------------------------------------------------------------------
// Does what this class is meant to do.
int vtkRenderedAreaPicker::AreaPick(double x0, double y0, double x1, double y1,
vtkRenderer *renderer)
{
int picked = 0;
vtkProp *propCandidate;
vtkAbstractMapper3D *mapper = NULL;
int pickable;
// Initialize picking process
this->Initialize();
this->Renderer = renderer;
this->SelectionPoint[0] = (x0+x1)*0.5;
this->SelectionPoint[1] = (y0+y1)*0.5;
this->SelectionPoint[2] = 0.0;
// Invoke start pick method if defined
this->InvokeEvent(vtkCommand::StartPickEvent,NULL);
this->DefineFrustum(x0, y0, x1, y1, renderer);
// Ask the renderer do the hardware pick
vtkPropCollection* pickList = NULL;
if(this->PickFromList)
{
pickList = this->PickList;
}
this->SetPath(renderer->PickPropFrom(x0, y0, x1, y1,pickList));
// Software pick resulted in a hit.
if ( this->Path )
{
picked = 1;
//invoke the pick event
propCandidate = this->Path->GetLastNode()->GetViewProp();
//find the mapper and dataset corresponding to the picked prop
pickable = this->TypeDecipher(propCandidate, &mapper);
if ( pickable )
{
if ( mapper )
{
this->Mapper = mapper;
vtkMapper *map1;
vtkAbstractVolumeMapper *vmap;
vtkImageMapper3D *imap;
if ( (map1=vtkMapper::SafeDownCast(mapper)) != NULL )
{
this->DataSet = map1->GetInput();
this->Mapper = map1;
}
else if ( (vmap=vtkAbstractVolumeMapper::SafeDownCast(mapper)) != NULL )
{
this->DataSet = vmap->GetDataSetInput();
this->Mapper = vmap;
}
else if ( (imap=vtkImageMapper3D::SafeDownCast(mapper)) != NULL )
{
this->DataSet = imap->GetDataSetInput();
this->Mapper = imap;
}
else
{
this->DataSet = NULL;
}
}//mapper
}//pickable
//go through list of props the renderer got for us and put only
//the prop3Ds into this->Prop3Ds
vtkPropCollection *pProps = renderer->GetPickResultProps();
pProps->InitTraversal();
vtkProp *prop;
vtkAssemblyPath *path;
while ((prop = pProps->GetNextProp()))
{
for ( prop->InitPathTraversal(); (path=prop->GetNextPath()); )
{
propCandidate = path->GetLastNode()->GetViewProp();
pickable = this->TypeDecipher(propCandidate, &mapper);
if ( pickable && !this->Prop3Ds->IsItemPresent(prop) )
{
this->Prop3Ds->AddItem(static_cast<vtkProp3D *>(prop));
}
}
}
// Invoke pick method if one defined - prop goes first
this->Path->GetFirstNode()->GetViewProp()->Pick();
this->InvokeEvent(vtkCommand::PickEvent,NULL);
}
this->InvokeEvent(vtkCommand::EndPickEvent,NULL);
return picked;
}
//----------------------------------------------------------------------------
void vtkRenderedAreaPicker::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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