VTK根据几个点插值成样条曲线，然后以样条曲线为中心线，生成圆柱体管道

VTK根据几个点插值成样条曲线，然后以样条曲线为中心线，生成圆柱体管道

#include "vtkActor.h"#include "vtkCamera.h"#include "vtkCellArray.h"#include "vtkPoints.h"#include "vtkPolyData.h"#include "vtkPolyDataMapper.h"#include "vtkRenderWindow.h"#include "vtkRenderWindowInteractor.h"#include "vtkRenderer.h" #include "vtkProperty.h"#include "vtkTubeFilter.h"#include "vtkParametricSpline.h"#include "vtkParametricFunctionSource.h"int main(){  vtkPoints *points=vtkPoints::New();points->InsertPoint(0, 0.0 ,0.0 ,0.0);points->InsertPoint(1 ,1.0 ,1.0 ,1.0);points->InsertPoint(2 ,1.0, 0.0 ,0.0);points->InsertPoint(3, 1.0 ,0.0, 1.0);////////////////////////////////////////////////////////////////////////////插值为样条曲线vtkParametricSpline *spline = vtkParametricSpline::New();spline->SetPoints(points);spline->ClosedOff();    vtkParametricFunctionSource *splineSource = vtkParametricFunctionSource::New();splineSource->SetParametricFunction(spline); vtkPolyDataMapper *splineMapper = vtkPolyDataMapper::New();splineMapper->SetInputConnection(splineSource->GetOutputPort());vtkActor *splineActor = vtkActor::New();splineActor->SetMapper(splineMapper);splineActor->GetProperty()->SetColor(0.3800 ,0.7000 ,0.1600);//////////////////////////////////////////////////////////////////////////    vtkTubeFilter *tube=vtkTubeFilter::New();tube->SetInput(splineSource->GetOutput());tube->SetNumberOfSides(20);tube->SetRadius(0.05); vtkPolyDataMapper *tubeMapper=vtkPolyDataMapper::New();tubeMapper->SetInput(tube->GetOutput());vtkActor *tubeActor=vtkActor::New();tubeActor->SetMapper(tubeMapper);vtkRenderer *ren1=vtkRenderer::New();vtkRenderWindow *renWin=vtkRenderWindow::New();renWin->AddRenderer(ren1);vtkRenderWindowInteractor *iren=vtkRenderWindowInteractor::New();iren->SetRenderWindow(renWin);ren1->AddActor(splineActor);ren1->AddActor(tubeActor);ren1->SetBackground(1, 1, 1);renWin->SetSize(250 ,250);renWin->Render();iren->Start();return 0;}