图解VC++ opengl环境配置和几个入门例子
VC6下载
http://blog.csdn.net/bcbobo21cn/article/details/44200205
demo工程和glut库下载
http://pan.baidu.com/s/1pLSpKiZ
一 环境配置
参阅
http://blog.itpub.net/17267437/viewspace-545635/
解压glut库
拷贝glut.h到如下目录；
拷贝图1的两个lib到如下目录；
拷贝图1的两个dll到如下目录（偶是64位系统）；
工程设置添加四个lib
二例子1
#include
#include
const int n = 200;
const GLfloat R = 0.5f;
const GLfloat Pi = 3.1415926536f;
void myDisplay(void)
{
int i;
// 画一个绿色正方形
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(0.0f,1.0f,0.0f);
glRectf(-0.5f, 0.4f, 0.0f, 0.9f); //画一个绿色的正方形
//glFlush();
//glClearColor(0.0,0.0,0.0,0.0);
//glClear(GL_COLOR_BUFFER_BIT);
glColor4f(1.0,0.0,0.0,1.0); // set the quad color
glBegin(GL_QUADS);
glVertex3f(-0.2,-0.2,0.0);
glVertex3f(0.2,-0.2,0.0);
glVertex3f(0.2,0.2,0.0);
glVertex3f(-0.2,0.2,0.0);
glEnd();
glColor4f(1.0,0.0,0.0,1.0); // set the point color
glPointSize(10);
glBegin(GL_POINTS);
glVertex3f(-0.5,-0.5,0.0);
glVertex3f(0.5,-0.5,0.0);
glVertex3f(0.5,0.5,0.0);
glVertex3f(-0.5,0.5,0.0);
glEnd();
glColor4f(1.0,0.0,0.0,1.0); // set the line color
glLineWidth(5);
glBegin(GL_LINES);
glVertex3f(-0.5,-0.5,0.0);
glVertex3f(0.5,-0.5,0.0);
glVertex3f(0.5,0.5,0.0);
glVertex3f(-0.5,0.5,0.0);
glEnd();
/*glBegin(GL_POLYGON);
for(i=0; i
glEnd();*/
glFlush();
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
glutInitWindowPosition(100, 0);
glutInitWindowSize(1024, 768);
glutCreateWindow("OpenGL基本绘制");
glutDisplayFunc(&myDisplay);
glutMainLoop();
return 0;
}
网上说要改下图的_CONSOLE，我没改也能在开发环境下运行；
三 例子2
#include
void myDisplay(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glRectf(-0.5f, -0.5f, 0.5f, 0.5f);
glFlush();
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);
glutInitWindowPosition(100, 100);
glutInitWindowSize(400, 400);
glutCreateWindow("第一个OpenGL程序");
glutDisplayFunc(&myDisplay);
glutMainLoop();
return 0;
}
四 例子3
#include
//Called to draw scene
void RenderSence(void)
{
//Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT);
//Flush drawing commands
glFlush();
}
//Set up the rendering state
void SetupRC(void)
{
glClearColor(0.0f,0.0f,1.0f,1.0f); //此时背景色为蓝色
}
int main(int argc, char *argv[])
{
//glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_SINGLE|GLUT_RGB);
glutCreateWindow("Simple"); //窗口名为“Simple”
glutDisplayFunc(RenderSence);
SetupRC();
glutMainLoop();
return 0;
}
编译，出现一堆下述错误；
demo4.cpp
y:\dddd10\vc6opengldemo\demo4\demo4.cpp(5) : error C2018: unknown character '0xa1'
y:\dddd10\vc6opengldemo\demo4\demo4.cpp(5) : error C2018: unknown character '0xa1'
y:\dddd10\vc6opengldemo\demo4\demo4.cpp(10) : error C2018: unknown character '0xa1'
......
是因为代码中包含全角字符；寻找发现该全角字符是空格；用替换功能，把全角空格全部替换为半角空格再编译即可；
五 例子4
#include
void background(void)
{
glClearColor(0.0,0.0,0.0,0.0);//设置背景颜色为黑色
}
void myDisplay(void)
{
glClear(GL_COLOR_BUFFER_BIT);//buffer设置为颜色可写
glBegin(GL_TRIANGLES);//开始画三角形
glShadeModel(GL_SMOOTH);//设置为光滑明暗模式
glColor3f(1.0,0.0,0.0);//设置第一个顶点为红色
glVertex2f(-1.0,-1.0);//设置第一个顶点的坐标为（-1.0，-1.0）
glColor3f(0.0,1.0,0.0);//设置第二个顶点为绿色
glVertex2f(0.0,-1.0);//设置第二个顶点的坐标为（0.0，-1.0）
glColor3f(0.0,0.0,1.0);//设置第三个顶点为蓝色
glVertex2f(-0.5,1.0);//设置第三个顶点的坐标为（-0.5，1.0）
glEnd();//三角形结束
glFlush();//强制OpenGL函数在有限时间内运行
}
void myReshape(GLsizei w,GLsizei h)
{
glViewport(0,0,w,h);//设置视口
glMatrixMode(GL_PROJECTION);//指明当前矩阵为GL_PROJECTION
glLoadIdentity();//将当前矩阵置换为单位阵
if(w <= h)
gluOrtho2D(-1.0,1.5,-1.5,1.5*(GLfloat)h/(GLfloat)w);//定义二维正视投影矩阵
else
gluOrtho2D(-1.0,1.5*(GLfloat)w/(GLfloat)h,-1.5,1.5);
glMatrixMode(GL_MODELVIEW);//指明当前矩阵为GL_MODELVIEW
}
int main(int argc,char ** argv)
{
/*初始化*/
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutInitWindowSize(400,400);
glutInitWindowPosition(200,200);
/*创建窗口*/
glutCreateWindow("Triangle");
/*绘制与显示*/
background();
glutReshapeFunc(myReshape);
glutDisplayFunc(myDisplay);
glutMainLoop();
return(0);
}
六 opengl资源链接
http://www.cnblogs.com/phinecos/category/90224.html
基于MFC的opengl编程