VTK初学一，c_Line_CellArray线段的CellArray绘制

VTK窗口默认坐标方向：

#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 "vtkLine.h"
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkCellArray.h>
void myShow(vtkPolyData* polydata)
{
    //设置映射器
    vtkSmartPointer<vtkPolyDataMapper> amapper=vtkSmartPointer<vtkPolyDataMapper>::New();
    amapper->SetInputData(polydata);
//    amapper->SetScalarVisibility(0);
    amapper->ScalarVisibilityOn();
    //声明一个演员
    vtkSmartPointer<vtkActor> anActor=vtkSmartPointer<vtkActor>::New();
    anActor->SetMapper(amapper);
    anActor->GetProperty()->SetRepresentationToWireframe();
    anActor->GetProperty()->SetDiffuseColor(0,0,1);
    anActor->GetProperty()->SetLineWidth(5);
    anActor->GetProperty()->SetPointSize(10);
     //创建显示窗口
    vtkSmartPointer<vtkRenderer> ren1=vtkSmartPointer<vtkRenderer>::New();
    ren1->AddActor(anActor);
    vtkSmartPointer<vtkRenderWindow> renWin=vtkSmartPointer<vtkRenderWindow>::New();
    renWin->AddRenderer(ren1);
    vtkSmartPointer<vtkRenderWindowInteractor> iren=vtkSmartPointer<vtkRenderWindowInteractor>::New();
    iren->SetRenderWindow(renWin);
    vtkSmartPointer<vtkInteractorStyleTrackballCamera>style=vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
    iren->SetInteractorStyle(style);
    renWin->SetSize(512,512);
    ren1->ResetCamera();
    iren->Start();
}
int main()
{
    //几何数据
    float pts[][3]={{0,0,0},{1,1,0}};
    vtkSmartPointer<vtkPoints> Pointes=vtkSmartPointer<vtkPoints>::New();
    Pointes->SetNumberOfPoints(2);
    Pointes->InsertPoint(0,pts[0]);
    Pointes->InsertPoint(1,pts[1]);
    //属性数据
    vtkSmartPointer<vtkFloatArray> lineScalars=vtkSmartPointer<vtkFloatArray>::New();
    lineScalars->SetNumberOfTuples(2);
    lineScalars->InsertValue(0,0);
    lineScalars->InsertValue(1,1);
    //拓扑结构
    vtkSmartPointer<vtkLine> aLine=vtkSmartPointer<vtkLine>::New();
    aLine->GetPointIds()->SetNumberOfIds(2);
    aLine->GetPointIds()->SetId(0,0);
    aLine->GetPointIds()->SetId(1,1);
    //创建单元数组
    vtkSmartPointer<vtkCellArray> lineCells=vtkSmartPointer<vtkCellArray>::New();
    lineCells->InsertNextCell(aLine);
    //将以上数据组合成一个vtkPolyData
    vtkSmartPointer<vtkPolyData> polydata=vtkSmartPointer<vtkPolyData>::New();
    polydata->SetPoints(Pointes);
    polydata->SetLines(lineCells);
    polydata->GetPointData()->SetScalars(lineScalars);
/**********在窗口中显示该结构元****************************************/
        myShow(polydata);
    return 0;
}