几个opengl立方体绘制案例
VC6 下载
http://blog.csdn.net/bcbobo21cn/article/details/44200205
opengl环境配置
http://blog.csdn.net/bcbobo21cn/article/details/51044614#t4
下面的demoproject
http://pan.baidu.com/s/1mhT1FIw
一 OpenGL 绘制一个立方体
代码#include<GL/glut.h>
// 绘制立方体
// 将立方体的八个顶点保存到一个数组里面
static const float vertex_list[][3] =
{
-0.5f, -0.5f, -0.5f,
0.5f, -0.5f, -0.5f,
-0.5f, 0.5f, -0.5f,
0.5f, 0.5f, -0.5f,
-0.5f, -0.5f, 0.5f,
0.5f, -0.5f, 0.5f,
-0.5f, 0.5f, 0.5f,
0.5f, 0.5f, 0.5f,
};
// 将要使用的顶点的序号保存到一个数组里面
static const GLint index_list[][2] =
{
{0, 1},
{2, 3},
{4, 5},
{6, 7},
{0, 2},
{1, 3},
{4, 6},
{5, 7},
{0, 4},
{1, 5},
{7, 3},
{2, 6}
};
// 绘制立方体
void DrawCube(void)
{
int i,j;
glBegin(GL_LINES);
for(i=0; i<12; ++i) // 12 条线段
{
for(j=0; j<2; ++j) // 每条线段 2个顶点
{
glVertex3fv(vertex_list[index_list[i][j]]);
}
}
glEnd();
}
static float rotate = 0;
static int times = 0;
void renderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushMatrix();
//glTranslatef(-0.2, 0, 0); // 平移
//glScalef(2, 1, 1); // 缩放
times++;
if(times > 100)
{
times = 0;
}
if(times % 100 == 0)
{
rotate += 0.3;
}
glRotatef(rotate, 0, 1, 0);
glRotatef(rotate, 1, 0, 0);
glColor3f(0, 0, 1);
DrawCube();
glPopMatrix();
glutSwapBuffers();
}
void main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(500, 500);
glutCreateWindow("GLDemo");
glutDisplayFunc(renderScene);
glutIdleFunc(renderScene);
glutMainLoop();
}效果。随时间而动；
glVertex函数用在glBegin和glEnd之间，除此以外没有意义。
用来指定点、线和多边形的顶点。当调用glVertex时。能够为该顶点指定颜色、法线量和纹理坐标。当仅仅指定x。y时。z缺省为0.0，w缺省为1.0；当仅仅指定x、y和z时。w缺省为1.0。
二 3D旋转立方体
代码
/**
* function：动态3D立方体
*/
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
char *className = "OpenGL";
char *windowName = "OpenGL Cube";
int winX = 0, winY = 0;
int winWidth = 300, winHeight = 300;
HDC hDC;
HGLRC hGLRC;
HPALETTE hPalette;
void init(void){
//设置视图投影
glMatrixMode(GL_PROJECTION);
glFrustum(-0.5F,0.5F,-0.5F,0.5F,1.0F,3.0F);
//视区定位
glMatrixMode(GL_MODELVIEW);
glTranslatef(0.0F,0.0F,-2.0F);
//物体定位
glRotatef(30.0F,1.0F,0.0F,0.0F);
glRotatef(30.0F,0.0F,1.0F,0.0F);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
}
void redraw(HDC hDC){
//清除颜色和深度缓冲区
//glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
//glClearDepth(2.0);
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
//画立方体的6个面
glBegin(GL_QUADS);
glNormal3f( 0.0F, 0.0F, 1.0F);
glVertex3f( 0.5f, 0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f, 0.5f);
glVertex3f(-0.5f,-0.5f, 0.5f);
glVertex3f( 0.5f,-0.5f, 0.5f);
//1----------------------------
glNormal3f( 0.0F, 0.0F,-1.0F);
glVertex3f(-0.1f,-0.5f,-0.5f);
glVertex3f(-0.5f, 0.5f,-0.5f);
glVertex3f( 0.5f, 0.5f,-0.5f);
glVertex3f( 0.5f,-0.5f,-0.5f);
//2----------------------------
glNormal3f( 0.0F, 1.0F, 0.0F);
glVertex3f( 0.5f, 0.5f, 0.5f);
glVertex3f( 0.5f, 0.5f,-0.5f);
glVertex3f(-0.5f, 0.5f,-0.5f);
glVertex3f(-0.5f, 0.5f, 0.5f);
//3----------------------------
glNormal3f( 0.0F,-1.0F, 0.0F);
glVertex3f(-0.5f,-0.5f,-0.5f);
glVertex3f( 0.5f,-0.5f,-0.5f);
glVertex3f( 0.5f,-0.5f, 0.5f);
glVertex3f(-0.5f,-0.5f, 0.5f);
//4----------------------------
glNormal3f( 1.0F, 0.0F, 0.0F);
glVertex3f( 0.5f, 0.5f, 0.5f);
glVertex3f( 0.5f,-0.5f, 0.5f);
glVertex3f( 0.5f,-0.5f,-0.5f);
glVertex3f( 0.5f, 0.5f,-0.5f);
//5----------------------------
glNormal3f(-1.0F, 0.0F, 0.0F);
glVertex3f(-0.5f,-0.5f,-0.5f);
glVertex3f(-0.5f,-0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f,-0.5f);
//6----------------------------*/
glEnd();
SwapBuffers(hDC);
}
void resize(void){
//设置视区。使之覆盖整个窗体
glViewport(0,0,winWidth,winHeight);
}
void setupPixelFormat(HWND hwnd, HDC* hDC, HGLRC* hRC){
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
/* get the device context (DC) */
*hDC = GetDC(hwnd);
/* set the pixel format for the DC */
ZeroMemory(&pfd, sizeof(pfd));
pfd.nSize = sizeof(pfd);//结构的大小
pfd.nVersion = 1;//版本号
pfd.dwFlags = PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;//支持双缓存
pfd.iPixelType = PFD_TYPE_RGBA;//颜色模式
pfd.cColorBits = 24;
pfd.cDepthBits = 16;//颜色深度
pfd.iLayerType = PFD_MAIN_PLANE;//主层
iFormat = ChoosePixelFormat(*hDC, &pfd);//确定pfd结构是否存在
SetPixelFormat(*hDC, iFormat, &pfd);
/* create and enable the render context (RC) */
*hRC = wglCreateContext(*hDC);
wglMakeCurrent(*hDC, *hRC);
/*if(iFormat == 0){
MessageBox(WindowFromDC(hDC),"ChoosePixelFormat failed.",
"Error",MB_ICONERROR|MB_OK);
exit(1);
}
if(SetPixelFormat(hDC,iFormat,&pfd)!=TRUE){
MessageBox(WindowFromDC(hDC),"SetPixelFormat failed.",
"Error",MB_ICONERROR|MB_OK);
exit(1);
}*/
}
void setupPalette(HDC hDC){
int pixelFormat = GetPixelFormat(hDC);
PIXELFORMATDESCRIPTOR pfd;
LOGPALETTE* pPal;
int paletteSize;
DescribePixelFormat(hDC,pixelFormat,
sizeof(PIXELFORMATDESCRIPTOR),&pfd);
if(pfd.dwFlags & PFD_NEED_PALETTE){
paletteSize = 1 << pfd.cColorBits;
}
else{
return ;
}
pPal = (LOGPALETTE*)malloc(sizeof(LOGPALETTE)+paletteSize*sizeof(PALETTEENTRY));
pPal->palVersion=0x300;
pPal->palNumEntries = paletteSize;
//建一个简单的RGB调色板
{
int redMask = (1 << pfd.cRedBits) - 1;
int greemMask = (1 << pfd.cGreenBits) - 1;
int blueMask = (1 << pfd.cBlueBits) - 1;
int i;
for(i=0;i<paletteSize;i++){
pPal->palPalEntry[i].peRed =
(((i >> pfd.cRedShift) & redMask) * 255)/greemMask;
//pPal->palPalEntry[i]-peGreen =
}
}
}
LRESULT CALLBACK WindowProc(HWND, UINT, WPARAM, LPARAM);
void EnableOpenGL(HWND hwnd, HDC*, HGLRC*);
void DisableOpenGL(HWND, HDC, HGLRC);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
WNDCLASSEX wcex;
HWND hwnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = FALSE;
float theta = 0.0f;
/* register window class */
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW|CS_VREDRAW;//CS_OWNDC;
wcex.lpfnWndProc = WindowProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "GLSample";
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);;
if (!RegisterClassEx(&wcex))
return 0;
/* create main window */
hwnd = CreateWindowEx(0,
"GLSample",
windowName,//"OpenGL Sample",
WS_OVERLAPPEDWINDOW/*后面是后来加的*/|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,
winX,//CW_USEDEFAULT,
winY,//CW_USEDEFAULT,
winWidth,//256,
winHeight,//256,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd, nCmdShow);
/* enable OpenGL for the window */
//setupPixelFormat(hwnd, &hDC, &hRC);
EnableOpenGL(hwnd, &hDC, &hRC);
init();
/* program main loop */
while (!bQuit)
{
/* check for messages */
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
/* handle or dispatch messages */
if (msg.message == WM_QUIT)
{
bQuit = TRUE;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else if(0)
{
/* OpenGL animation code goes here */
glClearColor(0.5f, 1.0f, 0.5f, 0.5f);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(theta, 0.0f, 0.0f, 1.0f);
glBegin(GL_TRIANGLES);
glColor3f(0.5f, 5.0f, 1.0f); glVertex2f(0.0f, 1.0f);
glColor3f(0.0f, 1.0f, 0.0f); glVertex2f(0.87f, -0.5f);
glColor3f(1.0f, 5.0f, 0.5f); glVertex2f(-0.87f, -0.5f);
glEnd();
glPopMatrix();
SwapBuffers(hDC);
theta += 1.0f;
//Sleep (1);
}
else{
glPushMatrix();
glRotatef(theta, 0.0f, 0.0f, 1.0f);
redraw(hDC);//立方体 须要初始化init（）函数
glPopMatrix();
theta += 1.0f;
}
}
/* shutdown OpenGL */
DisableOpenGL(hwnd, hDC, hRC);
/* destroy the window explicitly */
DestroyWindow(hwnd);
return msg.wParam;
}
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
/*case WM_CREATE:
hDC = GetDC(hwnd);
setupPalette(hDC);
hGLRC=wglCreateContext(hDC);
wglMakeCurrent(hDC,hGLRC);
init();
return 0;*/
case WM_CLOSE:
PostQuitMessage(0);
break;
case WM_DESTROY:
/*//------------------
if(hGLRC){
wglMakeCurrent(NULL,NULL);
wglDeleteContext(hGLRC);
}
if(hPalette){
DeleteObject(hPalette);
}
ReleaseDC(hwnd,hDC);
PostQuitMessage(0);
//====================*/
return 0;
//------------------------
case WM_SIZE:
//跟踪窗体大小改变
hGLRC=(struct HGLRC__ *)1;
if(hGLRC){
winWidth=(int)LOWORD(lParam);
winHeight=(int)LOWORD(lParam);
resize();
return 0;
}
case WM_PALETTECHANGED:
//假设它不是当前窗体，则实现调色板与hDC的相应
if(hGLRC && hPalette && (HWND) wParam != hwnd){
UnrealizeObject(hPalette);
SelectPalette(hDC,hPalette,FALSE);
//ReadlizePalette(hDC);
redraw(hDC);
break;
}
break;
//=========================
case WM_KEYDOWN:
{
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
break;
}
}
break;
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
return 0;
}
void EnableOpenGL(HWND hwnd, HDC* hDC, HGLRC* hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;
/* get the device context (DC) */
*hDC = GetDC(hwnd);
/* set the pixel format for the DC */
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;
iFormat = ChoosePixelFormat(*hDC, &pfd);
SetPixelFormat(*hDC, iFormat, &pfd);
/* create and enable the render context (RC) */
*hRC = wglCreateContext(*hDC);
wglMakeCurrent(*hDC, *hRC);
}
void DisableOpenGL (HWND hwnd, HDC hDC, HGLRC hRC)
{
wglMakeCurrent(NULL, NULL);
wglDeleteContext(hRC);
ReleaseDC(hwnd, hDC);
} 建立一个Win32project，如图；样例一是控制台project。
效果；
遇到例如以下错误。
lftdemo2.cpp
e:\dddd13\opengl立方体demo\lftdemo2\lftdemo2.cpp(308) : error C2440: '=' : cannot convert from 'const int' to 'struct HGLRC__ *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
运行 cl.exe 时出错.
把
hGLRC=1;
改为
hGLRC=(struct HGLRC__ *)1;
GL_QUADS：绘制由四个顶点组成的一组单独的四边形。顶点4n－3、4n－2、4n－1和4n定义了第n个四边形。总共绘制N/4个四边形
三 3D颜色立方体
代码：
#include <stdio.h>
#define GLUT_DISABLE_ATEXIT_HACK
#include <gl/glut.h>
//#pragma comment(lib, "glut32.lib")
GLfloat AngleX;
GLfloat AngleY;
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glPushMatrix();
{
glRotatef(AngleX,1.0f,0.0f,0.0f);
glRotatef(AngleY,0.0f,1.0f,0.0f);
glBegin(GL_POLYGON); //前表面
glColor3ub((GLubyte)255,(GLubyte)255,(GLubyte)255);//颜色设置为白色
glVertex3f(50.0f,50.0f,50.0f);
glColor3ub((GLubyte)255,(GLubyte)255,(GLubyte)0);//颜色设置为黄色
glVertex3f(50.0f,-50.0f,50.0f);
glColor3ub((GLubyte)255,(GLubyte)0,(GLubyte)0);//颜色设置为红色
glVertex3f(-50.0f,-50.0f,50.0f);
glColor3ub((GLubyte)255,(GLubyte)0,(GLubyte)255);//颜色设置为白色
glVertex3f(-50.0f,50.0f,50.0f);
glEnd();
glBegin(GL_POLYGON); //后表面
glColor3f(0.0f,1.0f,1.0f);//颜色设置为青色
glVertex3f(50.0f,50.0f,-50.0f);
glColor3f(0.0f,1.0f,0.0f);//颜色设置为绿色
glVertex3f(50.0f,-50.0f,-50.0f);
glColor3f(0.0f,0.0f,0.0f);//颜色设置为黑色
glVertex3f(-50.0f,-50.0f,-50.0f);
glColor3f(0.0f,0.0f,1.0f);//颜色设置为蓝色
glVertex3f(-50.0f,50.0f,-50.0f);
glEnd();
glBegin(GL_POLYGON); //上表面
glColor3d(0.0,1.0,1.0);//颜色设置为青色
glVertex3f(50.0f,50.0f,-50.0f);
glColor3d(1.0,1.0,1.0);//颜色设置为白色
glVertex3f(50.0f,50.0f,50.0f);
glColor3d(1.0,0.0,1.0);//颜色设置为品红色
glVertex3f(-50.0f,50.0f,50.0f);
glColor3d(0.0,0.0,1.0);//颜色设置为蓝色
glVertex3f(-50.0f,50.0f,-50.0f);
glEnd();
glBegin(GL_POLYGON); //下表面
glColor3ub(0u,255u,0u);//颜色设置为绿色
glVertex3f(50.0f,-50.0f,-50.0f);
glColor3ub(255u,255u,0u);//颜色设置为黄色
glVertex3f(50.0f,-50.0f,50.0f);
glColor3ub(255u,0u,0u);//颜色设置为红色
glVertex3f(-50.0f,-50.0f,50.0f);
glColor3ub(0u,0u,0u);//颜色设置为黑色
glVertex3f(-50.0f,-50.0f,-50.0f);
glEnd();
glBegin(GL_POLYGON); //左表面
glColor3ub((GLubyte)255,(GLubyte)255,(GLubyte)255);//颜色设置为白色
glVertex3f(50.0f,50.0f,50.0f);
glColor3ub((GLubyte)0,(GLubyte)255,(GLubyte)255);//颜色设置为青色
glVertex3f(50.0f,50.0f,-50.0f);
glColor3ub((GLubyte)0,(GLubyte)255,(GLubyte)0);//颜色设置为绿色
glVertex3f(50.0f,-50.0f,-50.0f);
glColor3ub((GLubyte)255,(GLubyte)255,(GLubyte)0);//颜色设置为黄色
glVertex3f(50.0f,-50.0f,50.0f);
glEnd();
glBegin(GL_POLYGON); //右表面
glColor3f(1.0f,0.0f,1.0f);//颜色设置为品红色
glVertex3f(-50.0f,50.0f,50.0f);
glColor3f(0.0f,0.0f,1.0f);//颜色设置为蓝色
glVertex3f(-50.0f,50.0f,-50.0f);
glColor3f(0.0f,0.0f,0.0f);//颜色设置为黑色
glVertex3f(-50.0f,-50.0f,-50.0f);
glColor3f(1.0f,0.0f,0.0f);//颜色设置为红色
glVertex3f(-50.0f,-50.0f,50.0f);
glEnd();
}
glPopMatrix();
glutSwapBuffers();
}
void reshape(int w, int h)
{
GLfloat aspect = (GLfloat)w / (GLfloat)h;
GLfloat nRange = 100.0f;
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION); //将当前矩阵指定为投影模式
glLoadIdentity();
//设置三维投影区
if (w<=h)
{
glOrtho(-nRange, nRange, -nRange * aspect, nRange * aspect, -nRange, nRange);
}
else
{
glOrtho(-nRange, nRange, -nRange / aspect, nRange / aspect, -nRange, nRange);
}
}
void key_board(GLint key,GLint x,GLint y)
{
if(key == GLUT_KEY_UP)
{
AngleX -= 5.0f;
}
if(key == GLUT_KEY_DOWN)
{
AngleX += 5.0f;
}
if(key == GLUT_KEY_LEFT)
{
AngleY -= 5.0f;
}
if(key == GLUT_KEY_RIGHT)
{
AngleY += 5.0f;
}
if(AngleX > 355.0f)
{
AngleX = 0.0f;
}
if(AngleX < 0.0f)
{
AngleX = 355.0f;
}
if(AngleY > 355.0f)
AngleY = 0.0f;
if(AngleY < 0.0f)
{
AngleY = 355.0f;
}
glutPostRedisplay();
}
void init()
{
AngleX = 45.0f;
AngleY = 315.0f;
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_DITHER);
glShadeModel(GL_SMOOTH);
}
void main(int argc,char* argv[])
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(480,480);
glutCreateWindow("OpenGL颜色立方体");
glutReshapeFunc(reshape);
glutDisplayFunc(display);
glutSpecialFunc(key_board); //设置处理特殊击键的回调函数
init();
glutMainLoop();
}效果：
四 光照立方体效果
代码：
#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#define WIN32_LEAN_AND_MEAN
//#pragma comment(lib, "openGL32.lib")
//#pragma comment(lib, "glu32.lib")
//#pragma comment(lib, "glaux.lib")
float angle=0.0f;
HDC g_HDC;
float legAngle[2]={0.0f,0.0f};
float armAngle[2]={0.0f,0.0f};
float ambientLight[]={0.1f,0.3f,0.8f,1.0f}; //环境光
float diffuseLight[]={0.25f,0.25f,0.25f,1.0f}; //散射光
float lightPosition[]={0.0f,0.0f,1.0f,0.0f}; //光源位置
//材质变量
float matAmbient[]={1.0f,1.0f,1.0f,1.0f};
float matDiff[]={1.0f,1.0f,1.0f,1.0f};
//初始化
void Initialize()
{
glClearColor(0.0f,0.0f,0.0f,0.0f); //清理颜色为黑色
glShadeModel(GL_SMOOTH); //使用平滑明暗处理
glEnable(GL_DEPTH_TEST); //剔除隐藏面
glEnable(GL_CULL_FACE); //不计算多边形背面
glFrontFace(GL_CCW); //多边形逆时针方向为正面
glEnable(GL_LIGHTING); //启用光照
//为LIGHT0设置析质
glMaterialfv(GL_FRONT,GL_AMBIENT,matAmbient);
glMaterialfv(GL_FRONT,GL_DIFFUSE,matDiff);
//如今開始调协LIGHT0
glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight); //设置环境光分量
glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight); //设置散射光分量
glLightfv(GL_LIGHT0,GL_POSITION,lightPosition); //设置光源在场景中的位置
//启用光
glEnable(GL_LIGHT0);
}
//绘制单位立方体
void DrawCube(float xPos,float yPos,float zPos)
{
glPushMatrix();
glTranslatef(xPos,yPos,zPos);
glBegin(GL_QUADS); //顶面
glNormal3f(0.0f,1.0f,0.0f);
glVertex3f(0.5f,0.5f,0.5f);
glVertex3f(0.5f,0.5f,-0.5f);
glVertex3f(-0.5f,0.5f,-0.5f);
glVertex3f(-0.5f,0.5f,0.5f);
glEnd();
glBegin(GL_QUADS); //底面
glNormal3f(0.0f,-1.0f,0.0f);
glVertex3f(0.5f,-0.5f,0.5f);
glVertex3f(-0.5f,-0.5f,0.5f);
glVertex3f(-0.5f,-0.5f,-0.5f);
glVertex3f(0.5f,-0.5f,-0.5f);
glEnd();
glBegin(GL_QUADS); //前面
glNormal3f(0.0f,0.0f,1.0f);
glVertex3f(0.5f,0.5f,0.5f);
glVertex3f(-0.5f,0.5f,0.5f);
glVertex3f(-0.5f,-0.5f,0.5f);
glVertex3f(0.5f,-0.5f,0.5f);
glEnd();
glBegin(GL_QUADS); //背面
glNormal3f(0.0f,0.0f,-1.0f);
glVertex3f(0.5f,0.5f,-0.5f);
glVertex3f(0.5f,-0.5f,-0.5f);
glVertex3f(-0.5f,-0.5f,-0.5f);
glVertex3f(-0.5f,0.5f,-0.5f);
glEnd();
glBegin(GL_QUADS); //左面
glNormal3f(-1.0f,0.0f,0.0f);
glVertex3f(-0.5f,0.5f,0.5f);
glVertex3f(-0.5f,0.5f,-0.5f);
glVertex3f(-0.5f,-0.5f,-0.5f);
glVertex3f(-0.5f,-0.5f,0.5f);
glEnd();
glBegin(GL_QUADS); //右面
glNormal3f(1.0f,0.0f,0.0f);
glVertex3f(0.5f,0.5f,0.5f);
glVertex3f(0.5f,-0.5f,0.5f);
glVertex3f(0.5f,-0.5f,-0.5f);
glVertex3f(0.5f,0.5f,-0.5f);
glEnd();
glPopMatrix();
}
//处理场景的绘制
void Render()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); //清理颜色/深度缓存
glLoadIdentity(); //复位旋转角度计数器
angle=angle+0.1f; //递增旋转角度计数器
if(angle>=360.0f) //假设已旋转一周,复位计数器
angle=0.0f;
glTranslatef(0.0f,0.0f,-3.0f);
glRotatef(angle,1.0f,0.0f,0.0f);
glRotatef(angle,0.0f,1.0f,0.0f);
glRotatef(angle,0.0f,0.0f,1.0f);
DrawCube(0.0f,0.0f,0.0f);
glFlush();
SwapBuffers(g_HDC); //交换前后缓存
}
//为设备环境设置像素格式的函数
void SetupPixelFormat(HDC hDC)
{
int nPixelFormat;
static PIXELFORMATDESCRIPTOR pfd=
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW|PFD_SUPPORT_OPENGL|PFD_DOUBLEBUFFER,
PFD_TYPE_RGBA,
32,
0,0,0,0,0,0,
0,
0,
0,
0,0,0,0,
16,
0,
0,
PFD_MAIN_PLANE,
0,
0,0,0
};
nPixelFormat=ChoosePixelFormat(hDC,&pfd);
SetPixelFormat(hDC,nPixelFormat,&pfd);
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
static HGLRC hRC;
static HDC hDC;
int width,height;
switch(message)
{
case WM_CREATE:
hDC=GetDC(hwnd);
g_HDC=hDC;
SetupPixelFormat(hDC);
hRC=wglCreateContext(hDC);
wglMakeCurrent(hDC,hRC);
return 0;
break;
case WM_CLOSE:
wglMakeCurrent(hDC,NULL);
wglDeleteContext(hRC);
PostQuitMessage(0);
return 0;
break;
case WM_SIZE:
height=HIWORD(lParam);
width=LOWORD(lParam);
if(height==0)
height=1;
glViewport(0,0,width,height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(54.0f,(GLfloat)width/(GLfloat)height,1.0f,1000.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
return 0;
break;
default:
break;
}
return (DefWindowProc(hwnd,message,wParam,lParam));
}
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
WNDCLASSEX windowClass;
HWND hwnd;
MSG msg;
bool done;
int width=800;
int height=600;
int bits=32;
windowClass.cbSize=sizeof(WNDCLASSEX);
windowClass.style=CS_HREDRAW|CS_VREDRAW;
windowClass.lpfnWndProc=WndProc;
windowClass.cbClsExtra=0;
windowClass.cbWndExtra=0;
windowClass.hInstance=hInstance;
windowClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
windowClass.hCursor=LoadCursor(NULL,IDC_ARROW);
windowClass.hbrBackground=NULL;
windowClass.lpszMenuName=NULL;
windowClass.lpszClassName="MyClass";
windowClass.hIconSm=LoadIcon(NULL,IDI_WINLOGO);
if(!RegisterClassEx(&windowClass))
return 0;
hwnd=CreateWindowEx(WS_EX_APPWINDOW|WS_EX_WINDOWEDGE,
"MyClass",
"OpenGL Cube",
WS_OVERLAPPEDWINDOW|WS_CLIPCHILDREN|WS_CLIPSIBLINGS,
0,0,
800,600,
NULL,
NULL,
hInstance,
NULL);
if(!hwnd)
return 0;
ShowWindow(hwnd,SW_SHOW);
UpdateWindow(hwnd);
Initialize(); //初始化绘制环境
done=false;
while(!done)
{
PeekMessage(&msg,hwnd,NULL,NULL,PM_REMOVE);
if(msg.message==WM_QUIT)
{
done=true;
}
else
{
Render();
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
}效果：
五 链接
http://blog.csdn.net/djl4104804/article/details/8131072opengl库和函数具体解释
