VTK初学一，e_Triangle_CellArray三角形的另一种方法绘制

#ifndef INITIAL_OPENGL

#define INITIAL_OPENGL

#include <vtkAutoInit.h>

VTK_MODULE_INIT(vtkRenderingOpenGL)

VTK_MODULE_INIT(vtkInteractionStyle)

#endif

#include <iostream>

using namespace std;

#include "vtkPolyDataMapper.h"

#include "vtkWin32OpenGLRenderWindow.h"

#include "vtkRenderWindow.h"

#include "vtkRenderWindowInteractor.h"

#include "vtkRenderer.h"

#include "vtkPoints.h"

#include "vtkWin32RenderWindowInteractor.h"

#include "vtkProperty.h"

#include "vtkFloatArray.h"

#include "vtkPolyData.h"

#include "vtkDataSetMapper.h"

#include "vtkActor2D.h"

#include "vtkContourFilter.h"

#include "vtkContourValues.h"

#include "vtkUnstructuredGrid.h"

#include "vtkPointData.h"

#include "vtkTriangle.h"

#include <vtkInteractorStyleTrackballCamera.h>

#include "vtkCellArray.h"

void myShow(vtkPolyData* aGrid)

{

    vtkSmartPointer<vtkPolyDataMapper> aMapper=vtkSmartPointer<vtkPolyDataMapper>::New();

    aMapper->SetInputData(aGrid);

    aMapper->ScalarVisibilityOn();

    vtkSmartPointer<vtkActor> anActor=vtkSmartPointer<vtkActor>::New();

    anActor->SetMapper(aMapper);

    anActor->GetProperty()->SetRepresentationToWireframe();

    anActor->GetProperty()->SetDiffuseColor(1,1,1);

//    anActor->GetProperty()->SetLineWidth(10);

    anActor->GetProperty()->SetPointSize(30);

    vtkSmartPointer<vtkRenderer> ren1=vtkSmartPointer<vtkRenderer>::New();

    vtkSmartPointer<vtkRenderWindow> renWin=vtkSmartPointer<vtkRenderWindow>::New();

    ren1->AddActor(anActor);

    ren1->ResetCamera();

    renWin->AddRenderer(ren1);

    renWin->SetSize(512,512);

    vtkSmartPointer<vtkRenderWindowInteractor> iren=vtkSmartPointer<vtkRenderWindowInteractor>::New();

    vtkSmartPointer<vtkInteractorStyleTrackballCamera> style=vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();

    iren->SetRenderWindow(renWin);

    iren->SetInteractorStyle(style);

    iren->Start();

}

int main()

{

    //几何数据

    vtkSmartPointer<vtkPoints> trianglePoints=vtkSmartPointer<vtkPoints>::New();

    trianglePoints->SetNumberOfPoints(3);

    trianglePoints->InsertPoint(0,0,0,0);

    trianglePoints->InsertPoint(1,1,0,0);

    trianglePoints->InsertPoint(2,1,1,1);

    //属性数据

    vtkSmartPointer<vtkFloatArray> pointsScalars=vtkSmartPointer<vtkFloatArray>::New();

    pointsScalars->SetNumberOfTuples(3);

    pointsScalars->SetValue(0,0);

    pointsScalars->SetValue(1,1);

    pointsScalars->SetValue(2,0);

    //形成组元数据

    vtkSmartPointer<vtkCellArray> lines=vtkSmartPointer<vtkCellArray>::New();

    lines->InsertNextCell(4);

    lines->InsertCellPoint(0);

    lines->InsertCellPoint(1);

    lines->InsertCellPoint(2);

    lines->InsertCellPoint(0);

    //几何轮廓

    vtkSmartPointer<vtkPolyData> profile=vtkSmartPointer<vtkPolyData>::New();

    profile->SetPoints(trianglePoints);

    profile->SetLines(lines);

    profile->GetPointData()->SetScalars(pointsScalars);

    myShow(profile);

    return 0;

}