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/*
* Copyright (C) 2010-2013 Thorsten Liebig (Thorsten.Liebig@gmx.de)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "vtkInteractorStyleRubberBand2DPlane.h"
#include "vtkCamera.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
vtkStandardNewMacro(vtkInteractorStyleRubberBand2DPlane);
vtkInteractorStyleRubberBand2DPlane::vtkInteractorStyleRubberBand2DPlane() : vtkInteractorStyleRubberBand2D()
{
}
void vtkInteractorStyleRubberBand2DPlane::OnMouseMove()
{
if (this->Interaction == PANNING)
{
vtkRenderWindowInteractor* rwi = this->GetInteractor();
int lastPt[] = {0, 0};
rwi->GetLastEventPosition(lastPt);
int curPt[] = {0, 0};
rwi->GetEventPosition(curPt);
vtkCamera* camera = this->CurrentRenderer->GetActiveCamera();
double lastScale = 2.0 * camera->GetParallelScale() / this->CurrentRenderer->GetSize()[1];
double lastFocalPt[] = {0, 0, 0};
camera->GetFocalPoint(lastFocalPt);
double lastPos[] = {0, 0, 0};
camera->GetPosition(lastPos);
double dop[3];
camera->GetDirectionOfProjection(dop);
int n_dir=-1;
for (int n=0;n<3;++n)
if ((dop[n]!=0) && (dop[(n+1)%2]==0) && (dop[(n+2)%3]==0))
n_dir = n;
if (n_dir<0)
{
cerr << __func__ << ": Error, no view in x-, y- or z-direction, skipping panning!";
return;
}
double delta[] = {0, 0, 0};
delta[(n_dir+1)%3] = -lastScale*(curPt[0] - lastPt[0]);
delta[(n_dir+2)%3] = -lastScale*(curPt[1] - lastPt[1]);
camera->SetFocalPoint(lastFocalPt[0] + delta[0], lastFocalPt[1] + delta[1], lastFocalPt[2] + delta[2]);
camera->SetPosition(lastPos[0] + delta[0], lastPos[1] + delta[1], lastPos[2] + delta[2]);
this->InvokeEvent(vtkCommand::InteractionEvent);
rwi->Render();
}
else
vtkInteractorStyleRubberBand2D::OnMouseMove();
}
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