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Cone

vtk-examples/Cxx/GeometricObjects/Cone

Description

vtkConeSource object creates a cone centered at a specified point and pointing in a specified direction. (By default, the center is the origin and the direction is the x-axis.)

Depending upon the resolution of this object, different representations are created. If resolution=0 a line is created; if resolution=1, a single triangle is created; if resolution=2, two crossed triangles are created.

For resolution > 2, a 3D cone (with resolution number of sides) is created.

It also is possible to control whether the bottom of the cone is capped with a (resolution-sided) polygon, and to specify the height and radius of the cone.

Other languages

See (Python), (Java), (CSharp)

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

Cone.cxx

#include <vtkConeSource.h>
#include <vtkNew.h>

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

int main(int, char*[])
{
  vtkNew<vtkNamedColors> colors;

  // Create a cone
  vtkNew<vtkConeSource> coneSource;
  coneSource->Update();

  // Create a mapper and actor.
  vtkNew<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(coneSource->GetOutputPort());

  vtkNew<vtkActor> actor;
  actor->SetMapper(mapper);
  actor->GetProperty()->SetDiffuseColor(colors->GetColor3d("bisque").GetData());

  // Create a renderer, render window, and interactor.
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->AddRenderer(renderer);
  renderWindow->SetSize(640, 480);

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  renderWindowInteractor->SetRenderWindow(renderWindow);

  // Add the actors to the scene.
  renderer->AddActor(actor);
  renderer->SetBackground(colors->GetColor3d("Salmon").GetData());

  // Render and interact.
  renderWindow->SetWindowName("Cone");
  renderWindow->Render();
  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(Cone)

find_package(VTK COMPONENTS 
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "Cone: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(Cone MACOSX_BUNDLE Cone.cxx )
  target_link_libraries(Cone PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS Cone
  MODULES ${VTK_LIBRARIES}
)

Download and Build Cone

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

cd Cone/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:

./Cone

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.