VTK学习之路——画画我的小苹果

#include "stdafx.h"
#include <vtkPoints.h>
#include <vtkSmartPointer.h>
#include <vtkCellArray.h>
#include <vtkPolyData.h>
#include <vtkPolyDataMapper.h>
#include <vtkRotationalExtrusionFilter.h>
#include <vtkActor.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
int _tmain(int argc, _TCHAR* argv[])
{
//定义苹果轮廓线的点坐标
vtkSmartPointer<vtkPoints>pPoints=vtkPoints::New();
pPoints->InsertPoint(0,0.0,0.0,1.5);
pPoints->InsertPoint(1,1.0,0.0,1);
pPoints->InsertPoint(2,2.0,0.0,1.5);
pPoints->InsertPoint(3,3.0,0.0,2.5);
pPoints->InsertPoint(4,3.5,0.0,3.0);
pPoints->InsertPoint(5,4.0,0.0,5.0);
pPoints->InsertPoint(6,3.5,0.0,6.0);
pPoints->InsertPoint(7,2.0,0.0,7.0);
pPoints->InsertPoint(8,1.0,0.0,6.0);
pPoints->InsertPoint(9,0.0,0.0,5.0);
//构建线单元，绘制轮廓线
vtkSmartPointer<vtkCellArray>pLineCell=vtkCellArray::New();
//构建一个单元，由10个点构成
pLineCell->InsertNextCell(10);
//构成单元点集的索引号
pLineCell->InsertCellPoint(0);
pLineCell->InsertCellPoint(1);
pLineCell->InsertCellPoint(2);
pLineCell->InsertCellPoint(3);
pLineCell->InsertCellPoint(4);
pLineCell->InsertCellPoint(5);
pLineCell->InsertCellPoint(6);
pLineCell->InsertCellPoint(7);
pLineCell->InsertCellPoint(8);
pLineCell->InsertCellPoint(9);
//定义多边形数据集
vtkSmartPointer<vtkPolyData>pPolyData=vtkPolyData::New();
//设置构成多边形的几何数据
pPolyData->SetPoints(pPoints);
//设置单元类型，线单元
pPolyData->SetLines(pLineCell);
//压制轮廓线，形成苹果实体
vtkSmartPointer<vtkRotationalExtrusionFilter>pExtruFilter=vtkRotationalExtrusionFilter::New();
pExtruFilter->SetInput(pPolyData);
//设置生成苹果表面的光滑度参数,苹果的表面由多少个面构成
pExtruFilter->SetResolution(10);
//将数据映射到图形系统进行绘制
vtkSmartPointer<vtkPolyDataMapper>pMap=vtkPolyDataMapper::New();
pMap->SetInput(pExtruFilter->GetOutput());
vtkSmartPointer<vtkActor>pActor=vtkActor::New();
pActor->SetMapper(pMap);
pActor->GetProperty()->SetColor(0.0,1.0,0.0);
//绘制
vtkSmartPointer<vtkRenderer>pRen=vtkRenderer::New();
pRen->AddActor(pActor);
//创建绘制窗体
vtkSmartPointer<vtkRenderWindow>pRenWin=vtkRenderWindow::New();
pRenWin->AddRenderer(pRen);
//创建交互器
vtkSmartPointer<vtkRenderWindowInteractor>pIren=vtkRenderWindowInteractor::New();
pIren->SetRenderWindow(pRenWin);
//设置背景颜色
pRen->SetBackground(1,1,1);
//设置窗口尺寸
pRenWin->SetSize(300,300);
pRenWin->Render();
pRen->ResetCamera();
//开始绘制
pIren->Initialize();
pIren->Start();
return 0;
}