cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
project(HighlightPickedActor)
find_package(VTK COMPONENTS
CommonColor
CommonCore
FiltersSources
InteractionStyle
RenderingContextOpenGL2
RenderingCore
RenderingFreeType
RenderingGL2PSOpenGL2
RenderingOpenGL2
)
if (NOT VTK_FOUND)
message(FATAL_ERROR "HighlightPickedActor: 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(HighlightPickedActor MACOSX_BUNDLE HighlightPickedActor.cxx )
target_link_libraries(HighlightPickedActor PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS HighlightPickedActor
MODULES ${VTK_LIBRARIES}
)
HighlightPickedActor.cxx 代码
#include<vtkActor.h>#include<vtkInteractorStyleTrackballCamera.h>#include<vtkMinimalStandardRandomSequence.h>#include<vtkNamedColors.h>#include<vtkNew.h>#include<vtkObjectFactory.h>#include<vtkPolyDataMapper.h>#include<vtkPropPicker.h>#include<vtkProperty.h>#include<vtkRenderWindow.h>#include<vtkRenderWindowInteractor.h>#include<vtkRenderer.h>#include<vtkSphereSource.h>namespace{// Handle mouse eventsclassMouseInteractorHighLightActor:publicvtkInteractorStyleTrackballCamera{public:static MouseInteractorHighLightActor*New();vtkTypeMacro(MouseInteractorHighLightActor,
vtkInteractorStyleTrackballCamera);MouseInteractorHighLightActor(){
LastPickedActor =NULL;
LastPickedProperty = vtkProperty::New();}virtual~MouseInteractorHighLightActor(){
LastPickedProperty->Delete();}virtualvoidOnLeftButtonDown()override{
vtkNew<vtkNamedColors> colors;int* clickPos =this->GetInteractor()->GetEventPosition();// Pick from this location.
vtkNew<vtkPropPicker> picker;
picker->Pick(clickPos[0], clickPos[1],0,this->GetDefaultRenderer());// If we picked something before, reset its propertyif(this->LastPickedActor){this->LastPickedActor->GetProperty()->DeepCopy(this->LastPickedProperty);}this->LastPickedActor = picker->GetActor();if(this->LastPickedActor){// Save the property of the picked actor so that we can// restore it next timethis->LastPickedProperty->DeepCopy(this->LastPickedActor->GetProperty());// Highlight the picked actor by changing its propertiesthis->LastPickedActor->GetProperty()->SetColor(
colors->GetColor3d("Red").GetData());this->LastPickedActor->GetProperty()->SetDiffuse(1.0);this->LastPickedActor->GetProperty()->SetSpecular(0.0);this->LastPickedActor->GetProperty()->EdgeVisibilityOn();}// Forward events
vtkInteractorStyleTrackballCamera::OnLeftButtonDown();}private:
vtkActor* LastPickedActor;
vtkProperty* LastPickedProperty;};vtkStandardNewMacro(MouseInteractorHighLightActor);}// namespace// Execute application.intmain(int argc,char* argv[]){
vtkNew<vtkNamedColors> colors;int numberOfSpheres =10;if(argc >1){
numberOfSpheres =atoi(argv[1]);}// A renderer and render window
vtkNew<vtkRenderer> renderer;
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->SetSize(640,480);
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("HighlightPickedActor");// An interactor
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);// Set the custom type to use for interaction.
vtkNew<MouseInteractorHighLightActor> style;
style->SetDefaultRenderer(renderer);
renderWindowInteractor->SetInteractorStyle(style);
vtkNew<vtkMinimalStandardRandomSequence> randomSequence;
randomSequence->SetSeed(8775070);for(int i =0; i < numberOfSpheres;++i){
vtkNew<vtkSphereSource> source;double x, y, z, radius;// random position and radius
x = randomSequence->GetRangeValue(-5.0,5.0);
randomSequence->Next();
y = randomSequence->GetRangeValue(-5.0,5.0);
randomSequence->Next();
z = randomSequence->GetRangeValue(-5.0,5.0);
randomSequence->Next();
radius = randomSequence->GetRangeValue(0.5,1.0);
randomSequence->Next();
source->SetRadius(radius);
source->SetCenter(x, y, z);
source->SetPhiResolution(11);
source->SetThetaResolution(21);
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(source->GetOutputPort());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper);double r, g, b;
r = randomSequence->GetRangeValue(0.4,1.0);
randomSequence->Next();
g = randomSequence->GetRangeValue(0.4,1.0);
randomSequence->Next();
b = randomSequence->GetRangeValue(0.4,1.0);
randomSequence->Next();
actor->GetProperty()->SetDiffuseColor(r, g, b);
actor->GetProperty()->SetDiffuse(0.8);
actor->GetProperty()->SetSpecular(0.5);
actor->GetProperty()->SetSpecularColor(
colors->GetColor3d("White").GetData());
actor->GetProperty()->SetSpecularPower(30.0);
renderer->AddActor(actor);}
renderer->SetBackground(colors->GetColor3d("SteelBlue").GetData());// Render and interact
renderWindow->Render();
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();return EXIT_SUCCESS;}
