void menu();
void input();
void output();
void translation();
void rotation();
void scaling();
void shearing();
void reflection();
int a[10][2],i,x,option,temp,angle,tx,ty,fx,fy,sh,k,n,axis,y;
float sx,sy;
void menu()
{
printf("menu\n");
printf("1.Translation\n");
printf("2.rotation\n");
printf("3.scaling\n");
printf("4.shearing\n");
printf("5.reflection\n");
printf("6.exit\n");
printf("enter the choice:");
scanf("%d",&option);
switch(option)
{
case 1:
input();
translation();
break;
case 2:
input();
rotation();
break;
case 3:
input();
scaling();
break;
case 4 :
input();
shearing();
break;
case 5:
input();
reflection();
break;
case 6:
exit(0);
break;
}
}
void input()
{
printf("enter the number of vertices:" );
scanf("%d",&n);
for(i=0;i
{
printf("enter the coordinates:");
scanf("%d%d%d%d",&a[i][0],&a[i][1],&a[i+1][0],&a[i+1][1]);
}
}
void output()
{
cleardevice();
for(i=0;i
{
line(a[i][0],a[i][1],a[i+1][0],a[i+1][1]);
}
}
void translation()
{
output();
printf("enter the tranformation vertex tx,ty:\n");
scanf("%d%d",&tx,&ty);
for(i=0;i<=n;i++)
{
a[i][0]=a[i][0]+tx;
a[i][1]=a[i][1]+ty;
}
output();
delay(10);
menu();
}
void rotation()
{
output();
printf("enter the rotating angle:");
scanf("%d",&y);
printf("enter the pivot point:");
scanf("%d%d",&fx,&fy);
k=(y*3.14)/180;
for(i=0;i<=n;i++)
{
a[i][0]=fx+(a[i][0]-fx)*cos(k)-(a[i][1]-fy)*sin(k);
a[i][1]=fy+(a[i][0]-fx)*sin(k)-(a[i][1]-fy)*cos(k);
}
output();
delay(10);
menu();
}
void scaling()
{
output();
printf("enter the scaling factor\n");
scanf("%f%f",&sx,&sy);
printf("enter the fixed point:");
scanf("%d%d",&fx,&fy);
for(i=0;i<=n;i++)
{
a[i][0]=a[i][0]*sx+fy*(1-sx);
a[i][1]=a[i][1]*sy+fy*(1-sy);
}
output();
delay(10);
menu();
}
void shearing()
{
output();
printf("enter the shear value:");
scanf("%d",&sh);
printf("enter the fixed point:");
scanf("%d%d",&fx,&fy);
printf("enter the axis for shearing if x-axis then 1 if y-axis the 0:");
scanf("%d",&axis);
for(i=0;i<=n;i++)
{
if(axis==1)
{
a[i][0]=a[i][0]+sh*(a[i][1]-fy);
}
else
{
a[i][1]=a[i][1]+sh*(a[i][0]-fx);
}
}
output();
delay(10);
menu();
}
void reflection()
{
output();
for(i=0;i<=n;i++)
{
temp=a[i][0];
a[i][0]=a[i][1];
a[i][1]=temp;
}
output();
delay(10);
menu();
}
void main()
{
int gd=DETECT,gm;
initgraph(&gd,&gm,"c:\\tcplus\\bgi");
menu();
getch();
}
