TexturePlane

VTKExamples/Cxx/Texture/TexturePlane


Description

Simple example of texture mapping.

Info

See Figure 7-33 in Chapter 7 in the VTK Textbook.

Code

TexturePlane.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkImageReader2.h>
#include <vtkImageReader2Factory.h>
#include <vtkNamedColors.h>
#include <vtkPlaneSource.h>
#include <vtkPolyDataMapper.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkTexture.h>
//
// This simple example shows how to do basic texture mapping.
//
//
// Load in the texture map. A texture is any unsigned char image. If it
// is not of this type, you will have to map it through a lookup table
// or by using vtkImageShiftScale.
//
int main (int argc, char *argv[])
{
  // Verify input arguments
  if ( argc != 2 )
  {
    std::cout << "Usage: " << argv[0]
              << " Filename" << std::endl;
    return EXIT_FAILURE;
  }

  vtkSmartPointer<vtkImageReader2Factory> readerFactory =
    vtkSmartPointer<vtkImageReader2Factory>::New();
  vtkImageReader2 *textureFile =
    readerFactory->CreateImageReader2(argv[1]);
  textureFile->SetFileName(argv[1]);
  textureFile->Update();

  vtkSmartPointer<vtkTexture> atext =
    vtkSmartPointer<vtkTexture>::New();
  atext->SetInputConnection(textureFile->GetOutputPort());
  atext->InterpolateOn();

// Create a plane source and actor. The vtkPlanesSource generates
// texture coordinates.
//
  vtkSmartPointer<vtkPlaneSource> plane =
    vtkSmartPointer<vtkPlaneSource>::New();

  vtkSmartPointer<vtkPolyDataMapper>  planeMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  planeMapper->SetInputConnection(plane->GetOutputPort());

  vtkSmartPointer<vtkActor> planeActor =
    vtkSmartPointer<vtkActor>::New();
  planeActor->SetMapper(planeMapper);
  planeActor->SetTexture(atext);

// Create the RenderWindow, Renderer and both Actors
  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();

  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();

  vtkSmartPointer<vtkRenderWindow> renWin =
    vtkSmartPointer<vtkRenderWindow>::New();
  renWin->AddRenderer(renderer);

  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  iren->SetRenderWindow(renWin);

// Add the actors to the renderer, set the background and size
  renderer->AddActor(planeActor);
  renderer->SetBackground(colors->GetColor3d("SlateGray").GetData());
  renWin->SetSize(640, 480);

// render the image
  renWin->Render();

  renderer->ResetCamera();
  renderer->GetActiveCamera()->Elevation(-30);
  renderer->GetActiveCamera()->Roll(-20);
  renderer->ResetCameraClippingRange();
  renWin->Render();
  iren->Start();

  textureFile->Delete();
 return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(TexturePlane)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(TexturePlane MACOSX_BUNDLE TexturePlane.cxx )

target_link_libraries(TexturePlane ${VTK_LIBRARIES})

Download and Build TexturePlane

Click here to download TexturePlane and its CMakeLists.txt file. Once the tarball TexturePlane.tar has been downloaded and extracted,

cd TexturePlane/build 

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./TexturePlane

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.