求助：OpenGL关于绘制3D网格线的问题，帮忙看下代码，本人新人

C/C++ code

#include "stdafx.h"#include <windows.h>#include <glut.h>#include <glaux.h>#pragma comment(lib,"opengl32.lib")#pragma comment(lib,"glaux.lib")LRESULT CALLBACK WindowProc(HWND,UINT,WPARAM,LPARAM);void EnableOpenGL(HWND hwnd,HDC* ,HGLRC*);void DisableOpenGL(HWND,HDC,HGLRC);int APIENTRY WinMain(    HINSTANCE hInstance,    HINSTANCE hPrevInstance,    LPSTR nCmdLine,    int nCmdShow){    WNDCLASSEX wcex;    HWND hwnd;    HDC hDC;    HGLRC hRC;    MSG msg;    BOOL bQuit=FALSE;    float i=0.0f,Angle=0.0f;    wcex.cbSize=sizeof(WNDCLASSEX);    wcex.cbClsExtra=0;    wcex.cbWndExtra=0;    wcex.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);    wcex.hCursor=LoadCursor(NULL,IDC_CROSS);    wcex.hIcon=LoadIcon(NULL,IDI_INFORMATION);    wcex.hIconSm=NULL;    wcex.hInstance=hInstance;    wcex.lpfnWndProc=WindowProc;    wcex.lpszClassName="OpenGL___Xiang";    wcex.lpszMenuName=NULL;    wcex.style=CS_HREDRAW|CS_VREDRAW;    if (!RegisterClassEx(&wcex))    {        MessageBox(NULL,"注册类失败!","Error",MB_ICONERROR);        return 0;    }    hwnd=CreateWindowEx(0,        "OpenGL___Xiang","OpenGL Sample",WS_OVERLAPPEDWINDOW,        CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,        NULL,NULL,hInstance,0);    ShowWindow(hwnd,SW_MAXIMIZE);    EnableOpenGL(hwnd,&hDC,&hRC);    while (!bQuit)    {        if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))        {            if (msg.message==WM_QUIT)            {                bQuit=TRUE;            }            else            {                TranslateMessage(&msg);                DispatchMessage(&msg);            }                        }        else        {            glClearColor(0.0f,0.0f,0.0f,0.5f);            glClearDepth(1.0f);            glEnable(GL_SMOOTH);            glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);            glPushMatrix();            glTranslatef(0.0f,0.0f,0.0f);            glColor3f(0.0f,1.0f,0.0f);            for (i=-50;i<=50;i+=1)            {                glBegin(GL_LINES);                glVertex3f(    -50,0,i);                glVertex3f(    50,0,i);                glVertex3f(    i,0,-50);                glVertex3f(    i,0,50);                glEnd();            }            glPopMatrix();            SwapBuffers(hDC);        }    }    DisableOpenGL(hwnd,hDC,hRC);    DestroyWindow(hwnd);    return msg.wParam;}LRESULT CALLBACK WindowProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam){    switch (msg)    {    case WM_CLOSE:        PostQuitMessage(0);        break;    case WM_KEYDOWN:        {            switch (wparam)            {            case VK_ESCAPE:                PostQuitMessage(0);                break;            }        }        break;    default:        return DefWindowProc(hwnd,msg,wparam,lparam);    }    return 0;}void EnableOpenGL(HWND hwnd,HDC* hDC,HGLRC* hRC){    PIXELFORMATDESCRIPTOR pfd;    int iFormat;    *hDC=GetDC(hwnd);    ZeroMemory(&pfd,sizeof(pfd));    pfd.nSize=sizeof(pfd);    pfd.nVersion=1;    pfd.dwFlags=PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER;    pfd.iPixelType=PFD_TYPE_RGBA;    pfd.cColorBits=24;    pfd.cDepthBits=16;    pfd.iLayerType=PFD_MAIN_PLANE;     //颜色输出单通道？    iFormat=ChoosePixelFormat(*hDC,&pfd);    SetPixelFormat(*hDC,iFormat,&pfd);    *hRC=wglCreateContext(*hDC);    wglMakeCurrent(*hDC,*hRC);}void DisableOpenGL(HWND hwnd,HDC hdc,HGLRC hRC){    wglMakeCurrent(NULL,NULL);    wglDeleteContext(hRC);    ReleaseDC(hwnd,hdc);}

[解决办法]
第一种可能：视角不对吧，你是在XOZ平面上绘制的网格，OpenGL默认视角是人眼位置在Z轴上，所以你看到的只能是一条线。
第二种可能：投影不正确，导致只看到某一条线
------解决方案--------------------

看看这篇文章有没有参考价值
http://blog.csdn.net/xianglitian/article/details/6164103
[解决办法]
同意2楼的说法，代码是对的，可能是视角不对