aaaaaaa.cpp

在mfc中简单运动的正方形,其原理可为有些初学者作出一点贡献

#include "math.h" 

#include "stdafx.h" 
 
  #include   "gl/gl.h"   
  #include   "gl/glu.h"   
  #include   "gl/glaux.h"   
  #pragma   comment(lib,"openGL32.lib")   
  #pragma   comment(lib,"glu32.lib");   
  #pragma   comment(lib,"glaux.lib");   

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); 
}