Flip
VTKExamples/Cxx/Images/Flip
Description
This example demonstrates how to flip an image over an axis.
Need a better source image (non-symmetrical!).
Code
Flip.cxx
#include <vtkImageData.h>
#include <vtkImageCast.h>
#include <vtkSmartPointer.h>
#include <vtkImageMapper3D.h>
#include <vtkImageFlip.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkRenderer.h>
#include <vtkImageMandelbrotSource.h>
#include <vtkImageActor.h>
int main(int, char *[])
{
// Create an image
vtkSmartPointer<vtkImageMandelbrotSource> source =
vtkSmartPointer<vtkImageMandelbrotSource>::New();
source->Update();
vtkSmartPointer<vtkImageCast> castSource =
vtkSmartPointer<vtkImageCast>::New();
castSource->SetOutputScalarTypeToUnsignedChar();
castSource->SetInputConnection(source->GetOutputPort());
castSource->Update();
vtkSmartPointer<vtkImageFlip> flipXFilter =
vtkSmartPointer<vtkImageFlip>::New();
flipXFilter->SetFilteredAxis(0); // flip x axis
flipXFilter->SetInputConnection(source->GetOutputPort());
flipXFilter->Update();
vtkSmartPointer<vtkImageCast> castXFilter =
vtkSmartPointer<vtkImageCast>::New();
castXFilter->SetOutputScalarTypeToUnsignedChar();
castXFilter->SetInputConnection(flipXFilter->GetOutputPort());
castXFilter->Update();
vtkSmartPointer<vtkImageFlip> flipYFilter =
vtkSmartPointer<vtkImageFlip>::New();
flipYFilter->SetFilteredAxis(1); // flip y axis
flipYFilter->SetInputConnection(source->GetOutputPort());
flipYFilter->Update();
vtkSmartPointer<vtkImageCast> castYFilter =
vtkSmartPointer<vtkImageCast>::New();
castYFilter->SetOutputScalarTypeToUnsignedChar();
castYFilter->SetInputConnection(flipYFilter->GetOutputPort());
castYFilter->Update();
vtkSmartPointer<vtkImageFlip> flipZFilter =
vtkSmartPointer<vtkImageFlip>::New();
flipZFilter->SetFilteredAxis(2); // flip z axis
flipZFilter->SetInputConnection(source->GetOutputPort());
flipZFilter->Update();
vtkSmartPointer<vtkImageCast> castZFilter =
vtkSmartPointer<vtkImageCast>::New();
castZFilter->SetOutputScalarTypeToUnsignedChar();
castZFilter->SetInputConnection(flipZFilter->GetOutputPort());
castZFilter->Update();
// Create actors
vtkSmartPointer<vtkImageActor> inputActor =
vtkSmartPointer<vtkImageActor>::New();
inputActor->GetMapper()->SetInputConnection(castSource->GetOutputPort());
vtkSmartPointer<vtkImageActor> xActor =
vtkSmartPointer<vtkImageActor>::New();
xActor->GetMapper()->SetInputConnection(castXFilter->GetOutputPort());
vtkSmartPointer<vtkImageActor> yActor =
vtkSmartPointer<vtkImageActor>::New();
yActor->GetMapper()->SetInputConnection(castYFilter->GetOutputPort());
vtkSmartPointer<vtkImageActor> zActor =
vtkSmartPointer<vtkImageActor>::New();
zActor->GetMapper()->SetInputConnection(castZFilter->GetOutputPort());
// Define viewport ranges
// (xmin, ymin, xmax, ymax)
double inputViewport[4] = {0.0, 0.0, 0.25, 1.0};
double xViewport[4] = {0.25, 0.0, 0.5, 1.0};
double yViewport[4] = {0.5, 0.0, 0.75, 1.0};
double zViewport[4] = {0.75, 0.0, 1.0, 1.0};
// Setup renderers
vtkSmartPointer<vtkRenderer> inputRenderer =
vtkSmartPointer<vtkRenderer>::New();
inputRenderer->SetViewport(inputViewport);
inputRenderer->AddActor(inputActor);
inputRenderer->ResetCamera();
inputRenderer->SetBackground(.4, .5, .9);
vtkSmartPointer<vtkRenderer> xRenderer =
vtkSmartPointer<vtkRenderer>::New();
xRenderer->SetViewport(xViewport);
xRenderer->AddActor(xActor);
xRenderer->ResetCamera();
xRenderer->SetBackground(.4, .5, .6);
vtkSmartPointer<vtkRenderer> yRenderer =
vtkSmartPointer<vtkRenderer>::New();
yRenderer->SetViewport(yViewport);
yRenderer->AddActor(yActor);
yRenderer->ResetCamera();
yRenderer->SetBackground(.4, .5, .7);
vtkSmartPointer<vtkRenderer> zRenderer =
vtkSmartPointer<vtkRenderer>::New();
zRenderer->SetViewport(zViewport);
zRenderer->AddActor(zActor);
zRenderer->ResetCamera();
zRenderer->SetBackground(.4, .5, .8);
// Setup render window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->SetSize(1000, 250);
renderWindow->AddRenderer(inputRenderer);
renderWindow->AddRenderer(xRenderer);
renderWindow->AddRenderer(yRenderer);
renderWindow->AddRenderer(zRenderer);
// Setup render window interactor
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
renderWindowInteractor->SetInteractorStyle(style);
// Render and start interaction
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(Flip)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(Flip MACOSX_BUNDLE Flip.cxx)
target_link_libraries(Flip ${VTK_LIBRARIES})
Download and Build Flip
Click here to download Flip and its CMakeLists.txt file. Once the tarball Flip.tar has been downloaded and extracted,
cd Flip/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:
./Flip
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.