VTK初学一，a_Vertex图形点的绘制

系统：Win8.1

QT版本：2.4.2，Mingw

VTK版本：6.3

2. main.cpp

#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 "vtkVertex.h"

#include "vtkInteractorStyleTrackballCamera.h"

void myShow(vtkSmartPointer<vtkUnstructuredGrid> aGrid);

int  main()

{

    // create a scene with one of each cell type

//Vertex

    vtkPoints *vertexPoints=vtkPoints::New();

    vertexPoints-> SetNumberOfPoints (1);

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

    vtkFloatArray *vertexScalars=vtkFloatArray::New();

    vertexScalars-> SetNumberOfTuples (1);

    vertexScalars-> InsertValue (0, 1);

    vtkVertex *aVertex=vtkVertex::New();

    aVertex-> GetPointIds()-> SetId (0, 0);

    vtkUnstructuredGrid *aVertexGrid=vtkUnstructuredGrid::New();

    aVertexGrid-> Allocate (1, 1);

    aVertexGrid-> InsertNextCell (aVertex-> GetCellType(), aVertex ->GetPointIds());

    aVertexGrid ->SetPoints (vertexPoints);

    aVertexGrid-> GetPointData() ->SetScalars (vertexScalars);

    myShow(aVertexGrid);

    return 0;

}

void myShow(vtkSmartPointer<vtkUnstructuredGrid> aGrid)

{

    //设置映射器

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

    aMapper->SetInputData(aGrid);

    aMapper->ScalarVisibilityOn();

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

    anActor->SetMapper(aMapper);

    anActor->GetProperty()->SetRepresentationToPoints();

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

    anActor->GetProperty()->SetDiffuseColor(1,0,0);

//    anActor->GetProperty()->SetLineWidth(5);

//    anActor->GetProperty()->SetEdgeColor(1,0,0);

    anActor->GetProperty()->SetPointSize(10);

 //创建显示窗口

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

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

    ren1->AddActor(anActor);

    renWin->AddRenderer(ren1);

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

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

    iren->SetInteractorStyle(style);

    iren->SetRenderWindow(renWin);

    renWin->SetSize(700,700);

    ren1->ResetCamera();

    renWin->Render();

    iren->Start();

}