好了，现在整篇代码应该是这个样子了：
// GlTest.cpp : 定义应用程序的入口点。
//
#include "stdafx.h"
#include "GlTest.h"
#define MAX_LOADSTRING 100
// 全局变量：
HINSTANCE hInst; // 当前实例
HWND g_hWnd;
HDC g_hDC;
HGLRC g_glRes;
short nSrcBox[ 3 * 8 ] = {
5, 5, 0, 5, 5, 10,
5, -5, 0, 5, -5, 10,
-5, -5, 0, -5, -5, 10,
-5, 5, 0, -5, 5, 10,
};
BYTE byIndex[36] ={
0, 4, 6, 0, 2, 4,
0, 6, 7, 0, 7, 1,
0, 3, 2, 0, 1, 3,
5, 2, 3, 5, 4, 2,
5, 6, 4, 5, 7, 6,
5, 1, 7, 5, 3, 1,
};
short nTempBox[ 36 * 3 ];
float fNormal[ 36 * 3 ];
TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
template <typename Type>
HRESULT ReduceToUnit( Type *pVector )
{
double dLength = sqrt( (double)pVector[0] * (double)pVector[0] +
(double)pVector[1] * (double)pVector[1] +
(double)pVector[2] * (double)pVector[2] );
if ( FLOATEQUAL( dLength, 0.0, 1e-8 ) )
{
dLength = 1.0;
}
pVector[0] /= (Type)dLength;
pVector[1] /= (Type)dLength;
pVector[2] /= (Type)dLength;
return S_OK;
}
template <typename T1, typename T2>
HRESULT CalcNormal( const T1 *pVertical, T2 *pNormal )
{
T1 d1[3], d2[3];
d1[0] = pVertical[0] - pVertical[3];
d1[1] = pVertical[1] - pVertical[4];
d1[2] = pVertical[2] - pVertical[5];
d2[0] = pVertical[3] - pVertical[6];
d2[1] = pVertical[4] - pVertical[7];
d2[2] = pVertical[5] - pVertical[8];
pNormal[0] = (T2)( d1[1] * d2[2] - d1[2] * d2[1] );
pNormal[1] = (T2)( d1[2] * d2[0] - d1[0] * d2[2] );
pNormal[2] = (T2)( d1[0] * d2[1] - d1[1] * d2[0] );
return ReduceToUnit( pNormal );
}
// 此代码模块中包含的函数的前向声明：
void OnCreate( HWND hWnd );
void OnCreated( void );
void OnDestroy( void );
void OnDraw( void );
void SetProjMatrix( WORD wWidth, WORD wHeight );
void SetModalMatrix( void );
void OnIdle( void );
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
// TODO: 在此放置代码。
MSG msg;
HACCEL hAccelTable;
// 初始化全局字符串
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_GLTEST, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// 执行应用程序初始化：
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_GLTEST);
// 主消息循环：
while ( true )
{
if ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
continue;
}
if ( WM_QUIT == msg.message )
{
break;
}
OnIdle();
}
return (int) msg.wParam;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = 0;
wcex.lpfnWndProc = (WNDPROC)WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_GLTEST);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = (LPCTSTR)IDC_GLTEST;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);
return RegisterClassEx(&wcex);
}
//
// 函数：InitInstance(HANDLE, int)
//
// 目的：保存实例句柄并创建主窗口
//
// 注释：
//
// 在此函数中，我们在全局变量中保存实例句柄并
// 创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // 将实例句柄存储在全局变量中
CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if ( !g_hWnd )
{
return FALSE;
}
OnCreated();
ShowWindow( g_hWnd, nCmdShow );
UpdateWindow( g_hWnd);
return TRUE;
}
//
// 函数：WndProc(HWND, unsigned, WORD, LONG)
//
// 目的：处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
switch (message)
{
case WM_CREATE:
OnCreate( hWnd );
break;
case WM_KEYDOWN:
g_bStartSwap = !g_bStartSwap;
break;
case WM_MOVE:
SetWindowText( g_hWnd, "Move" );
break;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// 分析菜单选择：
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_SIZE:
SetProjMatrix( LOWORD( lParam ), HIWORD( lParam ) );
break;
case WM_DESTROY:
OnDestroy();
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// “关于”框的消息处理程序。
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return TRUE;
}
break;
}
return FALSE;
}
void OnCreate( HWND hWnd )
{
g_hWnd = hWnd;
}
void OnDestroy( void )
{
ReleaseDC( g_hWnd, g_hDC );
wglDeleteContext( g_glRes );
}
void OnCreated( void )
{
g_hDC = GetDC( g_hWnd );
PIXELFORMATDESCRIPTOR pfd;
ZeroMemory( &pfd, sizeof(PIXELFORMATDESCRIPTOR) );
pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR );
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 32;
SetPixelFormat( g_hDC, ChoosePixelFormat( g_hDC, &pfd ), &pfd );
g_glRes = wglCreateContext( g_hDC );
wglMakeCurrent( g_hDC, g_glRes );
glEnable( GL_CULL_FACE );
glCullFace( GL_BACK );
glEnable( GL_DEPTH_TEST );
glDepthFunc( GL_LEQUAL );
int LightPos[] = { 50, 50, 10, 1 };
float LightColor[] = { 0.3f, 0.3f, 0.3f, 1.0f };
glEnable(GL_LIGHTING);
glLightiv( GL_LIGHT0, GL_POSITION, LightPos );
glLightfv( GL_LIGHT0, GL_AMBIENT, LightColor );
glLightfv( GL_LIGHT0, GL_DIFFUSE, LightColor );
glEnable( GL_LIGHT0 );
glEnable( GL_COLOR_MATERIAL );
glColorMaterial( GL_FRONT, GL_AMBIENT_AND_DIFFUSE );
glShadeModel( GL_SMOOTH );
glClearColor( 255.0f / 255.0f, 255.0f / 255.0f, 200.0f / 255.0f, 0.0 );
for ( int i = 0; i < 36; i++ )
{
MoveMemory( &nTempBox[ i * 3 ], &nSrcBox[ byIndex[i] * 3 ], sizeof(nTempBox[0]) * 3 );
}
for ( int i = 0; i < 12; i++ )
{
CalcNormal( &nTempBox[ i * 9 ], &fNormal[ i * 9 ] );
MoveMemory( &fNormal[ i * 9 + 3 ], &fNormal[ i * 9 ], sizeof(fNormal[0]) * 3 );
MoveMemory( &fNormal[ i * 9 + 6 ], &fNormal[ i * 9 ], sizeof(fNormal[0]) * 3 );
}
glEnableClientState( GL_VERTEX_ARRAY );
glVertexPointer( 3, GL_SHORT, 0, nTempBox );
glEnableClientState( GL_NORMAL_ARRAY );
glNormalPointer( GL_FLOAT, 0, fNormal );
glColor3ub( 140, 200, 255 );
}
void OnDraw( void )
{
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glDrawArrays( GL_TRIANGLES, 0, 36 );
SwapBuffers( g_hDC );
}
void SetModalMatrix( void )
{
glMatrixMode( GL_MODELVIEW );
glLoadIdentity( );
static float fRadius = 0;
fRadius += 0.01f;
if ( fRadius > M_PI * 2 )
{
fRadius = 0;
}
gluLookAt( cosf( fRadius ) * 30, sinf( fRadius ) * 30, 15.0,
0.0, 0.0, 0.0,
0.0, 0.0, 1.0 );
}
void SetProjMatrix( WORD wWidth, WORD wHeight )
{
glViewport( 0, 0, wWidth, wHeight );
glMatrixMode( GL_PROJECTION );
glLoadIdentity( );
gluPerspective( 45.0, (double)wWidth / (double)wHeight, 1.0, 1000.0 );
}
void OnIdle( void )
{
SetModalMatrix();
OnDraw();
} |
现在已经达到我们想要的效果了。
|