VTK/Examples/TransformPolyData
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< VTK | Examples(Redirected from Apply a Transformation to Points)
This example demonstrates how to apply a transform to a data set. vtkTransformPolyDataFilter can be replaced with vtkTransformFilter for different types of data sets, including UnstructuredGrid and StructuredGrid. (vtkTransformFilter will work with PolyData, too).
TransformPoints.cxx
#include <vtkSmartPointer.h> #include <vtkTransformPolyDataFilter.h> #include <vtkPointSource.h> #include <vtkPolyData.h> #include <vtkCellArray.h> #include <vtkPoints.h> #include <vtkTransform.h> int main(int argc, char *argv[]) { int numPoints = 10; vtkSmartPointer<vtkPointSource> pointSource = vtkSmartPointer<vtkPointSource>::New(); pointSource->SetNumberOfPoints(numPoints); pointSource->Update(); for(int i = 0; i < numPoints; i++) { double point[3]; pointSource->GetOutput()->GetPoint(i, point); cout << "Original point: (" << point[0] << ", " << point[1] << ", " << point[2] << ")" << endl; } vtkSmartPointer<vtkTransform> translation = vtkSmartPointer<vtkTransform>::New(); translation->Translate(1.0, 2.0, 3.0); vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter = vtkSmartPointer<vtkTransformPolyDataFilter>::New(); transformFilter->SetInputConnection(pointSource->GetOutputPort()); transformFilter->SetTransform(translation); transformFilter->Update(); vtkSmartPointer<vtkPolyData> translated = transformFilter->GetOutput(); for(unsigned int i = 0; i < numPoints; i++) { double point[3]; translated->GetPoint(i, point); cout << "Transloated point: (" << point[0] << ", " << point[1] << ", " << point[2] << ")" << endl; } return EXIT_SUCCESS; }
CMakeLists.txt
cmake_minimum_required(VERSION 2.6) PROJECT(TransformPolyData) FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE}) ADD_EXECUTABLE(TransformPolyData TransformPolyData.cxx) TARGET_LINK_LIBRARIES(TransformPolyData vtkHybrid)
