3·在VC下实现程序编译
在VC编辑器下键入下述代码后,保存为后缀是.cpp的C++文件。开始编译,在“The build command requires an active project workspace”。“Would you like to create a default project workspace”? 的提示后,选择“是(Y)”。进入“Project”菜单,选择“Setting”项,弹出“Project Setting”对话框,选择“Link”项,在“Libaray”栏目中加入OpenGL提供的函数库:“opengl32.lib glu32.lib glaux.lib”。(注意:在执行程序时,Windows的system目录下要包含opengl32.dll及glu32.dll两个动态连接库)。附源程序代码:
#include "windows.h" #include "gl/gl.h" #include "gl/glaux.h" #include "gl/glu.h" #include "math.h" void myinit() ...{ glClearColor(1,1,0,0); GLfloat ambient[]=...{.5,.5,.5,0}; glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient); GLfloat mat_ambient[]=...{.8,.8,.8,1.0}; GLfloat mat_diffuse[]=...{.8,.0,.8,1.0}; GLfloat mat_specular[]=...{1.0,.0,1.0,1.0}; GLfloat mat_shininess[]=...{50.0}; GLfloat light_diffuse[]=...{0,0,.5,1}; GLfloat light_position[]=...{0,0,1.0,0}; glMaterialfv(GL_FRONT_AND_BACK,GL_AMBIENT,mat_ambient); glMaterialfv(GL_FRONT_AND_BACK,GL_DIFFUSE,mat_diffuse); glMaterialfv(GL_FRONT_AND_BACK,GL_SPECULAR,mat_specular); glMaterialfv(GL_FRONT_AND_BACK,GL_SHININESS,mat_shininess); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0,GL_POSITION, light_position); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glDepthFunc(GL_LESS); glEnable(GL_DEPTH_TEST); } void CALLBACK display() ...{ glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); auxSolidSphere(1.0); // 绘制半径为1.0的实体球 glFlush(); // 强制输出图像 auxSwaPBuffers(); // 交换绘图缓存 Sleep(100); } void CALLBACK Idledisplay() ...{ // x,y满足x2+y2=0.01。这样可以使物体沿该圆轨迹运动。 static float x=-.1,y=0.0; static BOOL mark=TRUE; static float step=.01; x+=step; if(x<=.1&&x>=-.1) ...{ if(step>0) y=sqrt(.01-x*x); else y=-sqrt(.01-x*x); glTranslatef(x,y,0); } else ...{ step=0-step; } display(); } void CALLBACK myReshape(GLsizei w,GLsizei h) ...{ glViewport(0,0,w,h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if(w<=h) glOrtho(-3.5,3.5,-3.5*(GLfloat)w/(GLfloat)h, 3.5*(GLfloat)w/(GLfloat)h,-10,10); else glOrtho(-3.5*(GLfloat)w/(GLfloat)h,3.5* (GLfloat)w/(GLfloat)h,-3.5,3.5,-10,10); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void main() ...{ auxInitDisplayMode(AUX_DOUBLE|AUX_RGBA); auxInitPosition(0,0,400,400); auxInitWindow(" circle "); myinit(); auxReshapeFunc(myReshape); auxIdleFunc(Idledisplay); auxMainLoop(display); } 在Visual C++ 2005下编译 cl a.cpp /linkopengl32.lib glu32.lib glaux.lib user32.lib gdi32.lib kernel32.lib advapi32.lib