VTK/Examples/Cxx/Visualization/TextureMapQuad
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Jump to navigationJump to searchThis example defines 4 points (coplanar) and textures them using the input image.
Contents
TextureMapQuad.cxx
#include <vtkVersion.h>
#include <vtkImageData.h>
#include <vtkPointData.h>
#include <vtkCellArray.h>
#include <vtkJPEGReader.h>
#include <vtkPolyDataMapper.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkTexture.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkFloatArray.h>
#include <vtkPolygon.h>
#include <string>
int main ( int argc, char *argv[] )
{
// Parse command line arguments
if ( argc != 2 )
{
std::cerr << "Usage:" << argv[0] << " Filename" << std::endl;
return EXIT_FAILURE;
}
std::string inputFilename = argv[1];
// Read the image which will be the texture
vtkSmartPointer<vtkJPEGReader> jPEGReader =
vtkSmartPointer<vtkJPEGReader>::New();
jPEGReader->SetFileName ( inputFilename.c_str() );
// Create a plane
vtkSmartPointer<vtkPoints> points =
vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint(0.0, 0.0, 0.0);
points->InsertNextPoint(1.0, 0.0, 0.0);
points->InsertNextPoint(1.0, 1.0, 0.0);
points->InsertNextPoint(0.0, 2.0, 0.0);
vtkSmartPointer<vtkCellArray> polygons =
vtkSmartPointer<vtkCellArray>::New();
vtkSmartPointer<vtkPolygon> polygon =
vtkSmartPointer<vtkPolygon>::New();
polygon->GetPointIds()->SetNumberOfIds(4); //make a quad
polygon->GetPointIds()->SetId(0, 0);
polygon->GetPointIds()->SetId(1, 1);
polygon->GetPointIds()->SetId(2, 2);
polygon->GetPointIds()->SetId(3, 3);
polygons->InsertNextCell(polygon);
vtkSmartPointer<vtkPolyData> quad =
vtkSmartPointer<vtkPolyData>::New();
quad->SetPoints(points);
quad->SetPolys(polygons);
vtkSmartPointer<vtkFloatArray> textureCoordinates =
vtkSmartPointer<vtkFloatArray>::New();
textureCoordinates->SetNumberOfComponents(3);
textureCoordinates->SetName("TextureCoordinates");
float tuple[3] = {0.0, 0.0, 0.0};
textureCoordinates->InsertNextTuple(tuple);
tuple[0] = 1.0; tuple[1] = 0.0; tuple[2] = 0.0;
textureCoordinates->InsertNextTuple(tuple);
tuple[0] = 1.0; tuple[1] = 1.0; tuple[2] = 0.0;
textureCoordinates->InsertNextTuple(tuple);
tuple[0] = 0.0; tuple[1] = 2.0; tuple[2] = 0.0;
textureCoordinates->InsertNextTuple(tuple);
quad->GetPointData()->SetTCoords(textureCoordinates);
// Apply the texture
vtkSmartPointer<vtkTexture> texture =
vtkSmartPointer<vtkTexture>::New();
texture->SetInputConnection(jPEGReader->GetOutputPort());
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
#if VTK_MAJOR_VERSION <= 5
mapper->SetInput(quad);
#else
mapper->SetInputData(quad);
#endif
vtkSmartPointer<vtkActor> texturedQuad =
vtkSmartPointer<vtkActor>::New();
texturedQuad->SetMapper(mapper);
texturedQuad->SetTexture(texture);
// Visualize the textured plane
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(texturedQuad);
renderer->SetBackground(1,1,1); // Background color white
renderer->ResetCamera();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
Please try the new VTKExamples website.
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(TextureMapQuad)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(TextureMapQuad MACOSX_BUNDLE TextureMapQuad.cxx)
if(VTK_LIBRARIES)
target_link_libraries(TextureMapQuad ${VTK_LIBRARIES})
else()
target_link_libraries(TextureMapQuad vtkHybrid vtkWidgets)
endif()
Download and Build TextureMapQuad
Click here to download TextureMapQuad. and its CMakeLists.txt file.
Once the tarball TextureMapQuad.tar has been downloaded and extracted,
cd TextureMapQuad/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:
./TextureMapQuad
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.
Comments
Background color.