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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPropPicker.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 "vtkPropPicker.h"
#include "vtkAssemblyNode.h"
#include "vtkAssemblyPath.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkRenderer.h"
#include "vtkWorldPointPicker.h"
vtkStandardNewMacro(vtkPropPicker);
vtkPropPicker::vtkPropPicker()
{
this->PickFromProps = NULL;
this->WorldPointPicker = vtkWorldPointPicker::New();
}
vtkPropPicker::~vtkPropPicker()
{
this->WorldPointPicker->Delete();
}
// set up for a pick
void vtkPropPicker::Initialize()
{
this->vtkAbstractPropPicker::Initialize();
}
// Pick from the given collection
int vtkPropPicker::Pick(double selectionX, double selectionY,
double vtkNotUsed(z), vtkRenderer *renderer)
{
if ( this->PickFromList )
{
return this->PickProp(selectionX, selectionY, renderer, this->PickList);
}
else
{
return this->PickProp(selectionX, selectionY, renderer);
}
}
// Pick from the given collection
int vtkPropPicker::PickProp(double selectionX, double selectionY,
vtkRenderer *renderer, vtkPropCollection* pickfrom)
{
this->PickFromProps = pickfrom;
int ret = this->PickProp(selectionX, selectionY, renderer);
this->PickFromProps = NULL;
return ret;
}
// Perform pick operation with selection point provided. The z location
// is recovered from the zBuffer. Always returns 0 since no actors are picked.
int vtkPropPicker::PickProp(double selectionX, double selectionY,
vtkRenderer *renderer)
{
// Initialize picking process
this->Initialize();
this->Renderer = renderer;
this->SelectionPoint[0] = selectionX;
this->SelectionPoint[1] = selectionY;
this->SelectionPoint[2] = 0;
// Invoke start pick method if defined
this->InvokeEvent(vtkCommand::StartPickEvent,NULL);
// Have the renderer do the hardware pick
this->SetPath(
renderer->PickPropFrom(selectionX, selectionY, this->PickFromProps));
// If there was a pick then find the world x,y,z for the pick, and invoke
// its pick method.
if ( this->Path )
{
this->WorldPointPicker->Pick(selectionX, selectionY, 0, renderer);
this->WorldPointPicker->GetPickPosition(this->PickPosition);
this->Path->GetLastNode()->GetViewProp()->Pick();
this->InvokeEvent(vtkCommand::PickEvent,NULL);
}
this->InvokeEvent(vtkCommand::EndPickEvent,NULL);
// Call Pick on the Prop that was picked, and return 1 for success
if ( this->Path )
{
return 1;
}
else
{
return 0;
}
}
void vtkPropPicker::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
if (this->PickFromProps)
{
os << indent << "PickFrom List: " << this->PickFromProps << endl;
}
else
{
os << indent << "PickFrom List: (none)" << endl;
}
}
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