Difference between revisions of "VTK/Examples/Cxx/GLUT"

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Line 67: Line 67:
<source lang="cmake">
<source lang="cmake">
project(VtkGlut CXX)
project(VtkGlut CXX)
cmake_minimum_required(VERSION 2.8)
find_package(VTK REQUIRED)
find_package(VTK REQUIRED)

Revision as of 06:21, 21 November 2012

This page shows an example of how to use the new method vtkRenderWindow::InitializeFromCurrentContext() to associate a vtkRenderWindow instance to an existing window and activated OpenGL context. By using this method, VTK do not create the rendering container nor the OpenGL context so a vtkRenderWindow and thus VTK can be easily embedded in an existing graphical application.

The following code shows how to embed a VTK RenderWindow in a very basic GLUT based application.


#ifndef __APPLE_CC__
#include <gl/glut.h>
#include <glut.h>
#include "vtkConeSource.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderWindow.h"
#include "vtkCamera.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkNew.h"

vtkNew<vtkRenderer> ren;
vtkNew<vtkRenderWindow> renWin;

void Reshape(int width, int height)
  renWin->SetSize(width, height);

void Draw()
  ren->GetActiveCamera()->Azimuth( 1 );

int main( int argc, char **argv)
  // GLUT initialization
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
  glutCreateWindow("VTK-GLUT Example");

  // Creation of a simple VTK pipeline
  vtkNew<vtkConeSource> cone;

  vtkNew<vtkPolyDataMapper> coneMapper;
  coneMapper->SetInputConnection( cone->GetOutputPort() );

  vtkNew<vtkActor> coneActor;
  coneActor->SetMapper( coneMapper.GetPointer() );

  ren->AddActor( coneActor.GetPointer() );

  renWin->InitializeFromCurrentContext(); // here is the trick: associate the RenderWindow with the current OpenGL context created by GLUT
  renWin->AddRenderer( ren.GetPointer() );
  // Let's start the main GLUT rendering loop
  return EXIT_SUCCESS;


project(VtkGlut CXX)
cmake_minimum_required(VERSION 2.8)

find_package(VTK REQUIRED)
find_package(GLUT REQUIRED)



add_executable(${PROJECT_NAME} vtkglut.cxx)

target_link_libraries(${PROJECT_NAME} ${VTK_LIBRARIES} ${GLUT_LIBRARIES})