莫比乌斯环-vtkTriangleStrip

  1 #ifndef INITIAL_OPENGL
  2 #define INITIAL_OPENGL
  3 #include <vtkAutoInit.h>
  4 VTK_MODULE_INIT(vtkRenderingOpenGL)
  5 VTK_MODULE_INIT(vtkInteractionStyle)
  6 VTK_MODULE_INIT(vtkRenderingFreeType)
  7 #endif
  8 #include <iostream>
  9 using namespace std;
 10 
 11 #include "vtkPolyDataMapper.h"
 12 #include "vtkWin32OpenGLRenderWindow.h"
 13 #include "vtkRenderWindow.h"
 14 #include "vtkRenderWindowInteractor.h"
 15 #include "vtkRenderer.h"
 16 #include "vtkPoints.h"
 17 #include "vtkWin32RenderWindowInteractor.h"
 18 #include "vtkProperty.h"
 19 #include "vtkFloatArray.h"
 20 #include "vtkPolyData.h"
 21 #include "vtkDataSetMapper.h"
 22 #include "vtkActor2D.h"
 23 #include "vtkPointData.h"
 24 #include "vtkPolyVertex.h"
 25 #include <vtkInteractorStyleTrackballCamera.h>
 26 #include <vtkCellArray.h>
 27 #include "vtkDelaunay2D.h"
 28 #include "vtkMath.h"
 29 #include <vtkTransformFilter.h>
 30 #include <vtkCamera.h>
 31 #include <vtkTriangleStrip.h>
 32 
 33 void myShow(vtkPolyData* anInput)
 34 {
 35     vtkSmartPointer<vtkPolyDataMapper> aMapper=vtkSmartPointer<vtkPolyDataMapper>::New();
 36     aMapper->SetInputData(anInput);
 37     aMapper->ScalarVisibilityOn();
 38 
 39     vtkSmartPointer<vtkActor> anActor=vtkSmartPointer<vtkActor>::New();
 40     anActor->SetMapper(aMapper);
 41     anActor->GetProperty()->SetRepresentationToSurface();
 42     anActor->GetProperty()->SetPointSize(1);
 43     anActor->GetProperty()->SetColor(1,0,1);
 44     anActor->GetProperty()->SetOpacity(0.4);
 45 
 46     vtkSmartPointer<vtkRenderer> ren1=vtkSmartPointer<vtkRenderer>::New();
 47     vtkSmartPointer<vtkRenderWindow> renWin=vtkSmartPointer<vtkRenderWindow>::New();
 48 
 49     ren1->AddActor(anActor);
 50 
 51     ren1->SetBackground(0.5,0.5,0.5);
 52     ren1->SetBackground2(1,0,0);
 53     renWin->AddRenderer(ren1);
 54     renWin->SetSize(512,512);
 55 
 56     vtkSmartPointer<vtkRenderWindowInteractor> iren=vtkSmartPointer<vtkRenderWindowInteractor>::New();
 57     vtkSmartPointer<vtkInteractorStyleTrackballCamera> style=vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
 58     iren->SetRenderWindow(renWin);
 59     iren->SetInteractorStyle(style);
 60 
 61     ren1->ResetCamera();
 62     renWin->Render();
 63     iren->Start();
 64 }
 65 
 66 int main()
 67 {
 68     //创建几何点数据
 69     double vArr[2]={-0.5,0.5};
 70     double theta=vtkMath::Pi()*2;
 71     int thetaResolution=60;
 72     double dTheta=theta/thetaResolution;
 73     double *uArr=new double[thetaResolution];
 74     vtkSmartPointer<vtkPoints> points=vtkSmartPointer<vtkPoints>::New();
 75     for(int i=0;i<thetaResolution+1;i++)
 76     {
 77         uArr[i]=i*dTheta;
 78         double u=uArr[i];
 79         for(int j=0;j<2;j++)
 80         {
 81             double v=vArr[j];
 82             double pt[3]={(2+v/2*cos(u/2))*cos(u),(1+v/2*cos(u/2))*sin(u),v/2*sin(u/2)};
 83             points->InsertNextPoint(pt);
 84 
 85         }
 86     }
 87     //创建拓扑结构
 88     vtkSmartPointer<vtkTriangleStrip> mobiusStrip=vtkSmartPointer<vtkTriangleStrip>::New();
 89     mobiusStrip->GetPointIds()->SetNumberOfIds((thetaResolution+1)*2);
 90     for(int i=0;i<(thetaResolution+1)*2;i++)
 91         mobiusStrip->GetPointIds()->SetId(i,i);
 92     //将拓扑结构组合进Cell
 93     vtkSmartPointer<vtkCellArray> mobiusCell=vtkSmartPointer<vtkCellArray>::New();
 94     mobiusCell->InsertNextCell(mobiusStrip);
 95     //将几何点与Cell结构组合成一个PolyData。
 96     vtkSmartPointer<vtkPolyData> mobiusPolydata=vtkSmartPointer<vtkPolyData>::New();
 97     mobiusPolydata->SetPoints(points);
 98     mobiusPolydata->SetStrips(mobiusCell);
 99 
100     myShow(mobiusPolydata);
101     return 0;
102 }