LightActor
Repository source: LightActor
Other languages
See (Java)
Question
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Code¶
LightActor.cxx
#include <vtkCamera.h>
#include <vtkLight.h>
#include <vtkLightActor.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <cstdlib>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
vtkNew<vtkRenderer> renderer;
renderer->SetBackground(colors->GetColor3d("Black").GetData());
// Display where the light is
vtkNew<vtkLight> light;
light->SetPositional(true); // without this line, the program crashes
vtkNew<vtkLightActor> lightActor;
lightActor->SetLight(light);
renderer->AddViewProp(lightActor);
lightActor->GetFrustumProperty()->SetColor(
colors->GetColor3d("LavenderBlush").GetData());
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("LightActor");
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->ResetCamera();
renderer->ResetCameraClippingRange();
auto camera = renderer->GetActiveCamera();
camera->SetPosition(-2.17199, -2.50774, 2.18);
camera->SetFocalPoint(-0.144661, -0.146372, 0.180482);
camera->SetViewUp(0.0157883, 0.638203, 0.769706);
camera->SetDistance(3.69921);
camera->SetClippingRange(1.76133, 6.14753);
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
project(LightActor)
find_package(VTK COMPONENTS
CommonColor
CommonCore
InteractionStyle
RenderingContextOpenGL2
RenderingCore
RenderingFreeType
RenderingGL2PSOpenGL2
RenderingOpenGL2
)
if (NOT VTK_FOUND)
message(FATAL_ERROR "LightActor: 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(LightActor MACOSX_BUNDLE LightActor.cxx )
target_link_libraries(LightActor PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS LightActor
MODULES ${VTK_LIBRARIES}
)
Download and Build LightActor¶
Click here to download LightActor and its CMakeLists.txt file. Once the tarball LightActor.tar has been downloaded and extracted,
cd LightActor/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:
./LightActor
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.