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/*=========================================================================
Program: Visualization Toolkit
Module: vtkInteractorStyleMultiTouchCamera.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 "vtkInteractorStyleMultiTouchCamera.h"
#include "vtkCamera.h"
#include "vtkCallbackCommand.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
vtkStandardNewMacro(vtkInteractorStyleMultiTouchCamera);
//----------------------------------------------------------------------------
vtkInteractorStyleMultiTouchCamera::vtkInteractorStyleMultiTouchCamera()
{
}
//----------------------------------------------------------------------------
vtkInteractorStyleMultiTouchCamera::~vtkInteractorStyleMultiTouchCamera()
{
}
//----------------------------------------------------------------------------
void vtkInteractorStyleMultiTouchCamera::OnRotate()
{
int pointer = this->Interactor->GetPointerIndex();
this->FindPokedRenderer(this->Interactor->GetEventPositions(pointer)[0],
this->Interactor->GetEventPositions(pointer)[1]);
if ( this->CurrentRenderer == NULL )
{
return;
}
vtkCamera *camera = this->CurrentRenderer->GetActiveCamera();
camera->Roll( this->Interactor->GetRotation() - this->Interactor->GetLastRotation() );
camera->OrthogonalizeViewUp();
this->Interactor->Render();
}
//----------------------------------------------------------------------------
void vtkInteractorStyleMultiTouchCamera::OnPinch()
{
int pointer = this->Interactor->GetPointerIndex();
this->FindPokedRenderer(this->Interactor->GetEventPositions(pointer)[0],
this->Interactor->GetEventPositions(pointer)[1]);
if ( this->CurrentRenderer == NULL )
{
return;
}
vtkCamera *camera = this->CurrentRenderer->GetActiveCamera();
double dyf = this->Interactor->GetScale()/this->Interactor->GetLastScale();
if (camera->GetParallelProjection())
{
camera->SetParallelScale(camera->GetParallelScale() / dyf);
}
else
{
camera->Dolly(dyf);
if (this->AutoAdjustCameraClippingRange)
{
this->CurrentRenderer->ResetCameraClippingRange();
}
}
if (this->Interactor->GetLightFollowCamera())
{
this->CurrentRenderer->UpdateLightsGeometryToFollowCamera();
}
this->Interactor->Render();
}
//----------------------------------------------------------------------------
void vtkInteractorStyleMultiTouchCamera::OnPan()
{
int pointer = this->Interactor->GetPointerIndex();
this->FindPokedRenderer(this->Interactor->GetEventPositions(pointer)[0],
this->Interactor->GetEventPositions(pointer)[1]);
if ( this->CurrentRenderer == NULL )
{
return;
}
vtkCamera *camera = this->CurrentRenderer->GetActiveCamera();
vtkRenderWindowInteractor *rwi = this->Interactor;
// handle panning - 2 DOF
double viewFocus[4], focalDepth, viewPoint[3];
double newPickPoint[4], oldPickPoint[4], motionVector[3];
// Calculate the focal depth since we'll be using it a lot
camera->GetFocalPoint(viewFocus);
this->ComputeWorldToDisplay(viewFocus[0], viewFocus[1], viewFocus[2],
viewFocus);
focalDepth = viewFocus[2];
double *trans = this->Interactor->GetTranslation();
double *lastTrans = this->Interactor->GetLastTranslation();
this->ComputeDisplayToWorld(viewFocus[0] + trans[0] - lastTrans[0],
viewFocus[1] + trans[1] - lastTrans[1],
focalDepth,
newPickPoint);
// Has to recalc old mouse point since the viewport has moved,
// so can't move it outside the loop
this->ComputeDisplayToWorld(viewFocus[0],
viewFocus[1],
focalDepth,
oldPickPoint);
// Camera motion is reversed
motionVector[0] = oldPickPoint[0] - newPickPoint[0];
motionVector[1] = oldPickPoint[1] - newPickPoint[1];
motionVector[2] = oldPickPoint[2] - newPickPoint[2];
camera->GetFocalPoint(viewFocus);
camera->GetPosition(viewPoint);
camera->SetFocalPoint(motionVector[0] + viewFocus[0],
motionVector[1] + viewFocus[1],
motionVector[2] + viewFocus[2]);
camera->SetPosition(motionVector[0] + viewPoint[0],
motionVector[1] + viewPoint[1],
motionVector[2] + viewPoint[2]);
// clean up
if (this->Interactor->GetLightFollowCamera())
{
this->CurrentRenderer->UpdateLightsGeometryToFollowCamera();
}
camera->OrthogonalizeViewUp();
rwi->Render();
}
//----------------------------------------------------------------------------
void vtkInteractorStyleMultiTouchCamera::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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