VTK初学一，线段的CellArray绘制c_Line_CellArray

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;

}