double DistanceAtAngle(PointVector& points, TemplatePtr& T, double theta)
{
PointVector newpoints(points);
RotateBy(newpoints, theta);
return PathDistance(newpoints, T->Points);
}
void main()
{
clrscr();
float num,den;
CodeMatrix temp;
cout<<"Enter window co-ordinates\nEnter xmin and xmax\n";
cin>>xl>>xh;
cout<<"Enter ymin and ymax\n";
cin>>yl>>yh;
cout<<"Enter x and y co-ordinates of first end-point of line 1\n";
cin>>ax1>>ay1;
cout<<"Enter x and y co-ordinates of second end-point of line 1\n";
cin>>ax2>>ay2;
initialize();
display();
delay(2000);
cleardevice();
num=ay2-ay1;
den=ax2-ax1;
m=num/den;
again:
code(ax1,ay1,a1);
code(ax2,ay2,a2);
if(checkzero(a1)==1&&checkzero(a2)==1)
display();
else //(checkzero(a1)==-1&&checkzero(a2)==-1)
{
and(temp);
if(checkzero(temp)==1) //!=0 means line is not visible inside window
{
//intersection points
newpoints(a1,ax1,ay1,1);
newpoints(a2,ax2,ay2,2);
goto again;
}
//line discard
}
getch();
}
