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;
}