Line

VTKExamples/Cxx/GeometricObjects/Line

Description

The line is a primary one-dimensional cell. It is defined by two points. The direction along the line is from the first point to the second point.

Code

Line.cxx

#include <vtkSmartPointer.h>
#include <vtkLineSource.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkNamedColors.h>

int main(int, char *[])
{
  // Create two points, P0 and P1
  double p0[3] = {1.0, 0.0, 0.0};
  double p1[3] = {0.0, 1.0, 0.0};

  vtkSmartPointer<vtkLineSource> lineSource = 
    vtkSmartPointer<vtkLineSource>::New();
  lineSource->SetPoint1(p0);
  lineSource->SetPoint2(p1);

  // Visualize
  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();

  vtkSmartPointer<vtkPolyDataMapper> mapper = 
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(lineSource->GetOutputPort());
  vtkSmartPointer<vtkActor> actor = 
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetLineWidth(4);
  actor->GetProperty()->SetColor(colors->GetColor3d("Peacock").GetData());

  vtkSmartPointer<vtkRenderer> renderer = 
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);

  renderer->SetBackground(colors->GetColor3d("Silver").GetData());                                 
  renderer->AddActor(actor);

  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(Line)

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

add_executable(Line MACOSX_BUNDLE Line.cxx )

target_link_libraries(Line ${VTK_LIBRARIES})

Download and Build Line

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

cd Line/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:

./Line

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.