用OpenGL写的一个可以上下左右移动的球

#include<windows.h>
#include<math.h>
#include<GL/gl.h>
#include<GL/glu.h>
#include<GL/glaux.h>

int static left=0;
int static right=0;
int static up=0;
int static down=0;
int static aleft=0;
int static dright=0;
int static wup=0;
int static sdown=0;

void myinit(void);
void CALLBACK myReshape(GLsizei w,GLsizei h);
void CALLBACK display();
void CALLBACK toleft();
void CALLBACK toright();
void CALLBACK toup();
void CALLBACK todown();
void CALLBACK aaleft();
void CALLBACK ddright();
void CALLBACK wwup();
void CALLBACK ssdown();
void draw();

void myinit(void)
{
 glClearColor(0.0,0.0,0.0,0.0);
 glClear(GL_COLOR_BUFFER_BIT);
 glShadeModel(GL_FLAT);
}

void CALLBACK myReshape(GLsizei w,GLsizei h)
{
 glViewport(0.0,0.0,w,h);
 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();
 if(w<h)
  glOrtho(-10.0,10.0,-10.0*(GLfloat)h/(GLfloat)w,10.0*(GLfloat)w/(GLfloat)h,-10.0,10.0);
 else
  glOrtho(-10.0*(GLfloat)w/(GLfloat)h,10.0*(GLfloat)w/(GLfloat)h,-10.0,10.0,-10.0,10.0);
 glMatrixMode(GL_MODELVIEW);
 glLoadIdentity();
}

void CALLBACK display(void)
{
 glClear(GL_COLOR_BUFFER_BIT);
 glColor3f(0.0, 1.0, 1.0);
 glPushMatrix();
 glTranslatef(aleft,wup,0.0);
 glTranslatef(dright,sdown,0.0);
 glRotatef(left,0.0,1.0,0.0);
 glRotatef(right,0.0,1.0,0.0);
 glRotatef(up,1.0,0.0,0.0);
 glRotatef(down,1.0,0.0,0.0);
 draw();
 glPopMatrix();
 glFlush();
}

void draw()
{
 auxWireSphere(3.0);
}

void CALLBACK toleft()
{
 left=left+10;
}

void CALLBACK toright()
{
 right=right-10;
}

void CALLBACK toup()
{
 up=up+10; 
}

void CALLBACK todown()
{
 down=down-10;
}

void CALLBACK aaleft()
{
 aleft=aleft-1;
}

void CALLBACK ddright()
{
 dright=dright+1;
}

void CALLBACK wwup()
{
 wup=wup+1;
}

void CALLBACK ssdown()
{
 sdown=sdown-1;
}

void main()
{
 auxInitDisplayMode(AUX_SINGLE|AUX_RGBA);
 auxInitPosition(0.0,0.0,500,500);
 auxInitWindow("test");

 myinit();

 auxKeyFunc(AUX_LEFT,toleft);
 auxKeyFunc(AUX_RIGHT,toright);
 auxKeyFunc(AUX_UP,toup);
 auxKeyFunc(AUX_DOWN,todown);
 auxKeyFunc(AUX_a,aaleft);
 auxKeyFunc(AUX_d,ddright);
 auxKeyFunc(AUX_w,wwup);
 auxKeyFunc(AUX_s,ssdown);

 auxReshapeFunc(myReshape);
 auxMainLoop(display);
}