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109 lines
3.2 KiB
109 lines
3.2 KiB
2 years ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: FrustumClip.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkActor.h"
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#include "vtkCamera.h"
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#include "vtkClipPolyData.h"
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#include "vtkDebugLeaks.h"
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#include "vtkPlanes.h"
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#include "vtkPolyDataMapper.h"
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#include "vtkProperty.h"
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#include "vtkRegressionTestImage.h"
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#include "vtkRenderWindow.h"
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#include "vtkRenderWindowInteractor.h"
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#include "vtkRenderer.h"
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#include "vtkRenderer.h"
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#include "vtkSphereSource.h"
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// Generate a sphere. Create a view frustum looking at the sphere
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// Clip anything inside the frustum, then back away and view result
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int FrustumClip( int argc, char *argv[] )
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{
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vtkRenderer *renderer = vtkRenderer::New();
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vtkRenderWindow *renWin = vtkRenderWindow::New();
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renWin->AddRenderer(renderer);
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vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
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iren->SetRenderWindow(renWin);
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vtkSphereSource *sphere = vtkSphereSource::New();
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sphere->SetThetaResolution(36);
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sphere->SetPhiResolution(18);
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sphere->SetRadius(1);
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vtkPolyDataMapper *sphereMapper = vtkPolyDataMapper::New();
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sphereMapper->SetInputConnection( sphere->GetOutputPort());
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vtkActor *sphereActor = vtkActor::New();
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sphereActor->SetMapper(sphereMapper);
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renderer->AddActor(sphereActor);
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renderer->SetBackground(1,1,1);
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renWin->SetSize(400,300);
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vtkCamera *camera = renderer->GetActiveCamera();
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camera->SetPosition(1.5, 0.0, 0.0);
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renderer->ResetCameraClippingRange();
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// Display once with camera in position 1
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// Ensures clipping planes are initialized (camera matrix really).
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renWin->Render();
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// Now get the camera frustum and then move the camera away to see the
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// clipped away stuff
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double aspect=400.0/300.0, planeequations[24];
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camera->GetFrustumPlanes(aspect, planeequations);
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vtkPlanes *implictplanes = vtkPlanes::New();
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// TODO cleanup
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double ped[24];
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int i;
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for (i = 0; i < 24; ++i)
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{
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ped[i] = planeequations[i];
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}
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implictplanes->SetFrustumPlanes(ped);
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vtkClipPolyData *clipper = vtkClipPolyData::New();
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clipper->SetInputConnection(sphere->GetOutputPort());
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clipper->SetClipFunction(implictplanes);
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clipper->SetGenerateClipScalars(1);
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clipper->SetInsideOut(0);
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sphereMapper->SetInputConnection( clipper->GetOutputPort());
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camera->SetPosition(-4.0, 0.25, 0.25);
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renderer->ResetCameraClippingRange();
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sphereActor->GetProperty()->SetColor(0.0,0.0,0.0);
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renWin->Render();
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int retVal = vtkRegressionTestImage( renWin );
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if ( retVal == vtkRegressionTester::DO_INTERACTOR)
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{
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iren->Start();
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}
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// Clean up
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renderer->Delete();
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renWin->Delete();
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iren->Delete();
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sphere->Delete();
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sphereMapper->Delete();
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sphereActor->Delete();
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implictplanes->Delete();
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clipper->Delete();
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return !retVal;
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}
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