#include <iostream>
#include <stdio.h>
#include <malloc.h>

#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkCellArray.h"
#include "vtkFloatArray.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkProperty.h"
#include "vtkCubeSource.h"

void read_point_file(float p[][3], const char *name1)
{
        FILE *fp=NULL;
        if((fp=fopen(name1,"r"))==NULL)
        {
                cout<<"open file name1 error"<<endl;
                return;
        }
        float arr[3];
        int nn=0;
        fscanf(fp, "%d", &nn);
        int n=0;
        while(!feof(fp))
        {
                int ret=fscanf(fp,"%f %f %f",&arr[0],&arr[1],&arr[2]);
                if(ret!=3)
                        break;
                p[n][0]=arr[0];
                p[n][1]=arr[1];
                p[n][2]=arr[2];
                n++;
        }
        fclose(fp);
}

void read_tri_file(vtkIdType tri[][3], const char *name2)
{
        FILE *fp=NULL;
        if((fp=fopen(name2,"r"))==NULL)
        {
                cout<<"open file name2 error"<<endl;
                return;
        }
        int nn=0;
        fscanf(fp, "%d", &nn);
        int n=0;
        int num;
        int int_arr[3];
        while(!feof(fp))
        {
                int ret=fscanf(fp,"%d %d %d %d",&num, &int_arr[0],&int_arr[1],&int_arr[2]);
                if(ret!=4)
                        break;
                tri[n][0]=int_arr[0];
                tri[n][1]=int_arr[1];
                tri[n][2]=int_arr[2];
                n++;
        }
        fclose(fp);
}

int main(int argc, char *argv[])
{
        char *file1=NULL, *file2=NULL;
        if (argc < 3){
                file1 = (char*) malloc(20*sizeof(char));
                file2 = (char*)malloc(20*sizeof(char));
                file1 = (char *)("a.asc");
                file2 = (char *)("aa.asc");
        }else{
                file1 = argv[1];
                file2 = argv[2];
        }
        FILE *fp = NULL;
        int p_num = 0;
        if((fp=fopen(file1,"r"))==NULL)
        {
                cout<<"open file "<<argv[1]<<" error"<<endl;
                return 1;
        }
        fscanf (fp, "%d", &p_num);
        fclose(fp);
        printf("point number is : %d\n", p_num);
        float (*points_arr)[3] = (float ((*)[3]))malloc(3*p_num*sizeof(float));

        int tri_num = 0;
        if((fp=fopen(file2,"r"))==NULL)
        {
                cout<<"open file "<<argv[2]<<" error"<<endl;
                return 1;
        }
        fscanf (fp, "%d", &tri_num);
        fclose(fp);
        vtkIdType (*triangle_arr)[3] = (vtkIdType ((*)[3]))malloc(3*tri_num*sizeof(vtkIdType));
        printf("triangle number is : %d \n", tri_num);

        read_point_file(points_arr, file1);
        read_tri_file (triangle_arr, file2);

        int i;
        vtkPolyData *polydata = vtkPolyData::New();
        vtkPoints *points = vtkPoints::New();
        vtkCellArray *polys = vtkCellArray::New();

        vtkPolyDataMapper *polydataMapper = vtkPolyDataMapper::New();
        polydataMapper->SetInput(polydata);
        vtkActor *polydataActor = vtkActor::New();
        polydataActor->SetMapper(polydataMapper);
        polydataActor->GetProperty()->SetColor(0.0,0.0,1.0);

        vtkRenderer *renderer = vtkRenderer::New();
        vtkRenderWindow *renWin = vtkRenderWindow::New();
        renWin->AddRenderer(renderer);

        vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
        iren->SetRenderWindow(renWin);

        renderer->AddActor(polydataActor);
        renderer->SetBackground(1,1,1);
        renWin->SetSize(400,400);

        for (i=0; i<p_num; i++) points->InsertPoint(i,points_arr[i]);
        for (i=0; i<tri_num; i++){
                polys->InsertNextCell(3,triangle_arr[i]);
        }
        polydata->SetPoints(points);
        polydata->SetPolys(polys);
        renWin->Render();
        iren->Start();

        for (i=0; i<p_num; i++){
                double *pp=polydata->GetPoint(i);
                points = polydata->GetPoints();
                points->SetPoint(i, pp[0]+10.0, pp[1], pp[2]);
                polydata->SetPoints(points);
                polydataActor->GetProperty()->SetColor(0.0, 0.0, (i*1.0)/(i*1.0+0.000001));

                renWin->Render();
        }

        renWin->Render();
        iren->Start();

        polydata->Delete();
        polydataMapper->Delete();
        polydataActor->Delete();
        renderer->Delete();
        renWin->Delete();
        iren->Delete();

        return 0;
}
编译命令为：

                               
        gcc -o main polydata0.cxx -I /usr/include/vtk-5.0  /usr/lib/libvtkRendering.so -Wno-deprecated

运行：
./生成的可执行文件名  点表文件  面表文件                            
                       

此处动画显示的处理方式为将所有顶点坐标按顺序将z坐标都加10.0，处理方式如下:

				
	for (i=0; i<p_num; i++){
		double *pp=polydata->GetPoint(i);
		points = polydata->GetPoints();
		points->SetPoint(i, pp[0]+10.0, pp[1], pp[2]);
		polydata->SetPoints(points);
		polydataActor->GetProperty()->SetColor(0.0, 0.0, (i*1.0)/(i*1.0+0.000001));

		renWin->Render();
	}
				
			

对 代码的解释，首先是一个循环以遍历所有点，定义了临时指针变量pp(随便取的)，令pp指向当前顶点，采用代码 polydata->GetPoints()获取点表，points->SetPoint(i, pp[0]+10.0, pp[1], pp[2])用于设定点表中第i个点的坐标，重新设定polydata的点表polydata->SetPoints(points),然后就是重 新渲染显示renWin->Render()。可能细心的您已经发现了，这里有一行代码没解释 polydataActor->GetProperty()->SetColor(0.0, 0.0, (i*1.0)/(i*1.0+0.000001))，没错，的确没解释，也不需要解释，但是必须有，此代码用于设定对象的颜色，在VTK中不知为什么， 如果采用固定的常量颜色，无法实现动态刷新渲染，这里采用了变量(i*1.0)/(i*1.0+0.000001),没做实质性修改，但是正是有了此句代 码才能刷新渲染效果。