Created
January 26, 2017 17:26
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C program to restrict mouse in a circle.
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#include<graphics.h> | |
#include<conio.h> | |
#include<dos.h> | |
#include<stdlib.h> | |
#include<math.h> | |
union REGS i, o; | |
int initmouse() | |
{ | |
i.x.ax = 0; | |
int86(0X33, &i, &o); | |
return ( o.x.ax ); | |
} | |
void showmouseptr() | |
{ | |
i.x.ax = 1; | |
int86(0X33, &i, &o); | |
} | |
void hidemopuseptr() | |
{ | |
i.x.ax = 2; | |
int86(0X33,&i,&o); | |
} | |
void getmousepos(int *x, int *y) | |
{ | |
i.x.ax = 3; | |
int86(0X33, &i, &o); | |
*x = o.x.cx; | |
*y = o.x.dx; | |
} | |
void movemouseptr(int x, int y) | |
{ | |
i.x.ax = 4; | |
i.x.cx = x; | |
i.x.dx = y; | |
int86(0X33, &i, &o); | |
} | |
main() | |
{ | |
int gd = DETECT, gm, midx, midy, radius, x, y, tempx, tempy; | |
radius = 100; | |
initgraph(&gd, &gm, "C:\\TurboC3\\BGI"); | |
if(!initmouse()) | |
{ | |
closegraph(); | |
exit(1); | |
} | |
midx = getmaxx()/2; | |
midy = getmaxy()/2; | |
showmouseptr(); | |
movemouseptr(midx, midy); | |
circle(midx, midy, radius); | |
x = tempx = midx; | |
y = tempy = midy; | |
while(!kbhit()) | |
{ | |
getmousepos(&x, &y); | |
if((pow(x-midx,2)+pow(y-midy,2)-pow(radius,2))>0) | |
{ | |
movemouseptr(tempx, tempy); | |
x = tempx; | |
y = tempy; | |
} | |
tempx = x; | |
tempy = y; | |
} | |
closegraph(); | |
return 0; | |
} |
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