VTK/Tutorials/TriangleGeometryOnly
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< VTK | Tutorials(Redirected from VTK/Examples/Triangle GeometryOnly)
This example writes the coordinates of the corners of a triangle to a vtp file. There is geometry (points), but there is no topology (vertices), so if you open this file in Paraview, you will not see anything. You can "glyph" the points to see them, but generally some type of topology exists. We will see topology in the next example.
TrianglePoints.cxx
#include <vtkSmartPointer.h> #include <vtkPoints.h> #include <vtkXMLPolyDataWriter.h> #include <vtkPolyData.h> int main(int argc, char *argv[]) { //create a set of points vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint ( 1.0, 0.0, 0.0 ); points->InsertNextPoint ( 0.0, 0.0, 0.0 ); points->InsertNextPoint ( 0.0, 1.0, 0.0 ); //create a polydata vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); //add the points to the polydata polydata->SetPoints ( points ); //write the polydata to a file vtkSmartPointer<vtkXMLPolyDataWriter> writer = vtkSmartPointer<vtkXMLPolyDataWriter>::New(); writer->SetFileName ( "TrianglePoints.vtp" ); writer->SetInput ( polydata ); writer->Write(); return EXIT_SUCCESS; }
CMakeLists.txt
cmake_minimum_required(VERSION 2.6) PROJECT(TrianglePoints) FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE}) ADD_EXECUTABLE(TrianglePoints TrianglePoints.cxx) TARGET_LINK_LIBRARIES(TrianglePoints vtkHybrid)
