[vtkusers] help!!!

[liuzhiqiang_cnu]

Hello,vtkusers:
  I have many points got with a laser scanner.I　want to reconstruct a surface by them.
  I did that by using vtkDelaunay3D, but I see that the surface is not smoothing.So I  use vtkSmoothPolyDataFilter to smooth it.Indeed, few changes happened and the surface is not smoothing still.
  who can tell me the reasons or how to realize that I desired?
  Any help are welcomed and thank you very much!!

	for(i=0;i<L;i++)
	{
	  points->InsertPoint(i,points_coord[i][0],points_coord[i][1],points_coord[i][2]);	
	}	
    
	vtkPolyData *profile=vtkPolyData::New();
    profile->SetPoints(points);	
	
	vtkDelaunay3D *delpts = vtkDelaunay3D::New();
    delpts->SetInput(profile);                                 //data: my points
    delpts->SetTolerance(0.1);
    delpts->SetAlpha(0.02);

	vtkGeometryFilter  *gf=vtkGeometryFilter::New();
	gf->SetInput(delpts->GetOutput());   


   vtkReverseSense *reverse = vtkReverseSense::New();
   reverse->SetInput(gf->GetOutput());
   reverse->ReverseCellsOn();
   reverse->ReverseNormalsOn();
   reverse->Update();

	
  	vtkDecimatePro *deci=vtkDecimatePro::New();
    deci->SetInput(reverse->GetOutput());
    deci->SetTargetReduction(0.1);
    deci->PreserveTopologyOn();

	vtkSmoothPolyDataFilter *mooth=vtkSmoothPolyDataFilter::New();
	mooth->SetInput(deci->GetOutput());
	//mooth->SetConvergence(0.000001);
    mooth->SetNumberOfIterations(100);

	vtkPolyDataNormals *normals=vtkPolyDataNormals::New();
	normals->SetInput(mooth->GetOutput());
    normals->FlipNormalsOn();

    vtkPolyDataMapper *cloudMapper = vtkPolyDataMapper::New();
    cloudMapper->SetInput(normals->GetOutput());

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