Computer Graphics Clock

#include"stdio.h"
#include"conio.h"
#include"graphics.h"
#include"math.h"
#include"time.h"
#include"stdlib.h"
#include"dos.h"
time_t t,t1,t2,diff;int gd,gm,i,j,k,angle,minute,hour;
float b[2][2],a[2][2],c[2][2],e[2][2],f[2][2],g[2][2],h[2][2];
char m[2],hr[2],s[2];
struct time *d,l;
main()
{
int x,y;
clrscr();
initgraph(&gd,&gm," ");
detectgraph(&gd,&gm);
x=getmaxx();
y=getmaxy();
setcolor(4);
circle(0.5*x,0.5*y,0.45*y);
setcolor(13);
circle(0.5*x,0.5*y,0.455*y);
setcolor(4);
circle(0.5*x,0.5*y,0.46*y);
setcolor(13);
circle(0.5*x,0.1*y,0.01*y);
setfillstyle(1,4);
floodfill(0.5*x,0.1*y,13);
circle(0.8*x,0.5*y,0.01*y);
floodfill(0.8*x,0.5*y,13);
circle(0.5*x,0.9*y,0.01*y);
floodfill(0.5*x,0.9*y,13);
circle(0.2*x,0.5*y,0.01*y);
floodfill(0.2*x,0.5*y,13);
t2=time(&t);gettime(d);
angle=d->ti_sec*6;
minute=d->ti_min*6;
hour=d->ti_hour*30;
for(hour=d->ti_hour*30;;hour=hour+30)
{
g[0][0]=0;
g[0][1]=0;
g[1][0]=0;
g[1][1]=-0.15*y;
setcolor(0);
line(h[0][0]+0.5*x,h[0][1]+0.5*y,h[1][0]+0.5*x,h[1][1]+0.5*y);
b[0][0]=cos(hour*3.142/180);
b[0][1]=sin(hour*3.142/180);
b[1][0]=-sin(hour*3.142/180);
b[1][1]=cos(hour*3.142/180);
h[0][0]=g[0][0]*b[0][0]+g[0][1]*b[1][0];
h[0][1]=g[0][0]*b[0][1]+g[0][1]*b[1][1];
h[1][0]=g[1][0]*b[0][0]+g[1][1]*b[1][0];
h[1][1]=g[1][0]*b[0][1]+g[1][1]*b[1][1];
setcolor(4);
line(h[0][0]+0.5*x,h[0][1]+0.5*y,h[1][0]+0.5*x,h[1][1]+0.5*y);
for(minute=d->ti_min*6;minute<=359+d->ti_min*6;minute=minute+6)
{
e[0][0]=0;
e[0][1]=0;
e[1][0]=0;
e[1][1]=-0.25*y;
setcolor(0);
line(f[0][0]+0.5*x,f[0][1]+0.5*y,f[1][0]+0.5*x,f[1][1]+0.5*y);
b[0][0]=cos(minute*3.142/180);
b[0][1]=sin(minute*3.142/180);
b[1][0]=-sin(minute*3.142/180);
b[1][1]=cos(minute*3.142/180);
f[0][0]=e[0][0]*b[0][0]+e[0][1]*b[1][0];
f[0][1]=e[0][0]*b[0][1]+e[0][1]*b[1][1];
f[1][0]=e[1][0]*b[0][0]+e[1][1]*b[1][0];
f[1][1]=e[1][0]*b[0][1]+e[1][1]*b[1][1];
setcolor(4);
line(f[0][0]+0.5*x,f[0][1]+0.5*y,f[1][0]+0.5*x,f[1][1]+0.5*y);
for(;angle<=360;angle=angle+6)
{
a[0][0]=0;
a[0][1]=0;
a[1][0]=0;
a[1][1]=-0.35*y;
setcolor(0);
line(c[0][0]+0.5*x,c[0][1]+0.5*y,c[1][0]+0.5*x,c[1][1]+0.5*y);
b[0][0]=cos(angle*3.142/180);
b[0][1]=sin(angle*3.142/180);
b[1][0]=-sin(angle*3.142/180);
b[1][1]=cos(angle*3.142/180);
c[0][0]=a[0][0]*b[0][0]+a[0][1]*b[1][0];
c[0][1]=a[0][0]*b[0][1]+a[0][1]*b[1][1];
c[1][0]=a[1][0]*b[0][0]+a[1][1]*b[1][0];
c[1][1]=a[1][0]*b[0][1]+a[1][1]*b[1][1];
setcolor(4);
line(c[0][0]+0.5*x,c[0][1]+0.5*y,c[1][0]+0.5*x,c[1][1]+0.5*y);
line(f[0][0]+0.5*x,f[0][1]+0.5*y,f[1][0]+0.5*x,f[1][1]+0.5*y);
line(h[0][0]+0.5*x,h[0][1]+0.5*y,h[1][0]+0.5*x,h[1][1]+0.5*y);
do
{
t=time(&t1);k=difftime(t,t2);
}
while(k<1);
t2=t;
gettime(d);
itoa(d->ti_hour,hr,10);
setviewport(1,1,110,30,0);
clearviewport();
setviewport(0,0,639,479,0);
outtextxy(10,10,hr);
itoa(d->ti_min,m,10);
outtextxy(50,10,m);
itoa(d->ti_sec,s,10);
outtextxy(90,10,s);
if (kbhit()!=0)
{
break;
}
}
angle=0;
}
minute = 0;
}
getch();
closegraph();
}