Difference between revisions of "VTK/Examples/Boneyard/Frustum"

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<div class="floatright">[[File:VTK_Examples_Baseline_GeometricObjectsDisplay_TestDisplayFrustum.png]]</div>
 
This example gets the frustum from a camera and displays it on the screen.
 
  
==DisplayFrustum.cxx==
 
<source lang="cpp">
 
#include <vtkFrustumSource.h>
 
#include <vtkPolyData.h>
 
#include <vtkSmartPointer.h>
 
#include <vtkCamera.h>
 
#include <vtkPlanes.h>
 
#include <vtkMapper.h>
 
#include <vtkActor.h>
 
#include <vtkRenderWindow.h>
 
#include <vtkRenderer.h>
 
#include <vtkRenderWindowInteractor.h>
 
#include <vtkPolyDataMapper.h>
 
 
int main(int, char *[])
 
{
 
  vtkSmartPointer<vtkCamera> camera =
 
    vtkSmartPointer<vtkCamera>::New();
 
  double planesArray[24];
 
 
 
  camera->GetFrustumPlanes(1, planesArray);
 
 
 
  vtkSmartPointer<vtkPlanes> planes =
 
    vtkSmartPointer<vtkPlanes>::New();
 
  planes->SetFrustumPlanes(planesArray);
 
 
 
  vtkSmartPointer<vtkFrustumSource> frustumSource =
 
    vtkSmartPointer<vtkFrustumSource>::New();
 
  frustumSource->SetPlanes(planes);
 
  frustumSource->Update();
 
 
 
  vtkPolyData* frustum = frustumSource->GetOutput();
 
 
  vtkSmartPointer<vtkPolyDataMapper> mapper =
 
    vtkSmartPointer<vtkPolyDataMapper>::New();
 
  mapper->SetInput(frustum);
 
 
  vtkSmartPointer<vtkActor> actor =
 
    vtkSmartPointer<vtkActor>::New();
 
  actor->SetMapper(mapper);
 
 
 
  // a renderer and render window
 
  vtkSmartPointer<vtkRenderer> renderer =
 
    vtkSmartPointer<vtkRenderer>::New();
 
  vtkSmartPointer<vtkRenderWindow> renderWindow =
 
    vtkSmartPointer<vtkRenderWindow>::New();
 
  renderWindow->AddRenderer(renderer);
 
 
  // an interactor
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
  renderWindowInteractor->SetRenderWindow(renderWindow);
 
 
  // add the actors to the scene
 
  renderer->AddActor(actor);
 
  renderer->SetBackground( .2, .1, .3); // Background color dark purple
 
 
  // render an image (lights and cameras are created automatically)
 
  renderWindow->Render();
 
 
  // begin mouse interaction
 
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
 
}
 
 
</source>
 
 
==CMakeLists.txt==
 
<source lang="cmake">
 
cmake_minimum_required(VERSION 2.6)
 
 
PROJECT(Frustum)
 
 
FIND_PACKAGE(VTK REQUIRED)
 
INCLUDE(${VTK_USE_FILE})
 
 
ADD_EXECUTABLE(DisplayFrustum DisplayFrustum.cxx)
 
TARGET_LINK_LIBRARIES(DisplayFrustum vtkHybrid)
 
 
</source>
 

Latest revision as of 22:36, 13 August 2010