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/*=========================================================================
Program: Visualization Toolkit
Module: TestScenePicker.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.
=========================================================================*/
//
// Test class vtkScenePicker.
// Move your mouse around the scene and the underlying actor should be
// printed on standard output.
//
#include "vtkSphereSource.h"
#include "vtkPolyDataMapper.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkCommand.h"
#include "vtkTestUtilities.h"
#include "vtkRegressionTestImage.h"
#include "vtkScenePicker.h"
#include "vtkVolume16Reader.h"
#include "vtkProperty.h"
#include "vtkPolyDataNormals.h"
#include "vtkContourFilter.h"
#include <map>
#include <string>
//-----------------------------------------------------------------------------
// Create a few actors first
vtkActor *CreateActor1( int argc, char *argv[], vtkRenderer * aRenderer )
{
char* fname2 = vtkTestUtilities::ExpandDataFileName(
argc, argv, "Data/headsq/quarter");
vtkVolume16Reader *v16 = vtkVolume16Reader::New();
v16->SetDataDimensions (64,64);
v16->SetImageRange (1,93);
v16->SetDataByteOrderToLittleEndian();
v16->SetFilePrefix (fname2);
v16->SetDataSpacing (3.2, 3.2, 1.5);
// An isosurface, or contour value of 500 is known to correspond to the
// skin of the patient. Once generated, a vtkPolyDataNormals filter is
// is used to create normals for smooth surface shading during rendering.
vtkContourFilter *skinExtractor = vtkContourFilter::New();
skinExtractor->SetInputConnection(v16->GetOutputPort());
skinExtractor->SetValue(0, 500);
vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
skinNormals->SetInputConnection(skinExtractor->GetOutputPort());
skinNormals->SetFeatureAngle(60.0);
vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
skinMapper->SetInputConnection(skinNormals->GetOutputPort());
skinMapper->ScalarVisibilityOff();
vtkActor *skin = vtkActor::New();
skin->SetMapper(skinMapper);
skin->GetProperty()->SetColor(0.95,0.75,0.75);
aRenderer->AddActor(skin);
v16->Delete();
skinExtractor->Delete();
skinNormals->Delete();
skinMapper->Delete();
skin->Delete();
delete [] fname2;
return skin;
}
//-----------------------------------------------------------------------------
// Create a few actors first
vtkActor * CreateActor2( int vtkNotUsed(argc), char **vtkNotUsed(argv), vtkRenderer * ren )
{
vtkSphereSource *ss = vtkSphereSource::New();
ss->SetThetaResolution(30);
ss->SetPhiResolution(30);
ss->SetRadius(150.0);
vtkPolyDataMapper *mapper = vtkPolyDataMapper::New();
mapper->SetInputConnection(ss->GetOutputPort());
vtkActor *actor = vtkActor::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetColor(0.0,1.0,0.0);
ren->AddActor(actor);
ss->Delete();
mapper->Delete();
actor->Delete();
return actor;
}
//-----------------------------------------------------------------------------
// Command to write out picked actors during mouse over.
class TestScenePickerCommand : public vtkCommand
{
public:
vtkScenePicker * m_Picker;
static TestScenePickerCommand *New()
{
return new TestScenePickerCommand;
}
virtual void Execute(vtkObject *caller, unsigned long vtkNotUsed(eventId), void* vtkNotUsed(callData))
{
vtkRenderWindowInteractor * iren = reinterpret_cast<
vtkRenderWindowInteractor *>(caller);
int e[2];
iren->GetEventPosition(e);
cout << "DisplayPosition : (" << e[0] << "," << e[1] << ")"
<< " Prop: " << m_ActorDescription[m_Picker->GetViewProp(e)].c_str()
<< " CellId: " << m_Picker->GetCellId(e)
<< endl;
}
void SetActorDescription( vtkProp *a, std::string s )
{
this->m_ActorDescription[a] = s;
}
std::map< vtkProp *, std::string > m_ActorDescription;
protected:
TestScenePickerCommand()
{
this->SetActorDescription(static_cast<vtkActor*>(NULL), "None");
}
virtual ~TestScenePickerCommand() {}
};
//-----------------------------------------------------------------------------
int TestScenePicker(int argc, char* argv[])
{
vtkRenderer *ren = vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->SetStencilCapable(1);
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
renWin->AddRenderer(ren);
iren->SetRenderWindow(renWin);
ren->SetBackground(0.0, 0.0, 0.0);
renWin->SetSize(300, 300);
// Here comes the scene picker stuff. [ Just 2 lines ]
vtkScenePicker * picker = vtkScenePicker::New();
picker->SetRenderer(ren);
// Write some stuff for interactive stuff.
TestScenePickerCommand * command =
TestScenePickerCommand::New();
command->m_Picker = picker;
command->SetActorDescription( CreateActor1( argc, argv, ren ), "Head" );
command->SetActorDescription( CreateActor2( argc, argv, ren ), "Sphere" );
iren->AddObserver(vtkCommand::MouseMoveEvent, command);
picker->EnableVertexPickingOff();
renWin->Render();
int retVal = EXIT_SUCCESS;
int tryit = 1;
int rgba[4];
int e[2] = {175, 215};
renWin->GetColorBufferSizes(rgba);
if (rgba[0] < 8 || rgba[1] < 8 || rgba[2] < 8)
{
cerr
<< "Must have at least 24 bit color depth for cell selection."
<< endl;
tryit = 0;
}
if (!renWin->GetStencilCapable())
{
cerr
<< "Vertex selection will not work without stencil capable rendering."
<< endl;
//tryit = 0; //test doesn't exercise vertex selection
}
iren->Initialize();
if (tryit)
{
// Check if scene picking works.
if (command->m_ActorDescription[picker->GetViewProp(e)] != "Head" ||
picker->GetCellId(e) != 50992)
{
retVal = EXIT_FAILURE;
}
}
for ( int i = 0; i < argc; ++i )
{
if ( ! strcmp( argv[i], "-I" ) )
{
iren->Start();
}
}
// Cleanups
command->Delete();
picker->Delete();
ren->Delete();
renWin->Delete();
iren->Delete();
return retVal;
}
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