Question

I’m trying to compare two coordinates. I found that my loop never stops because of this:

exit = ((p.x * sign_x) >= end_pos.x) && ((p.y * sign_y) >= end_pos.y);
cout<< p.x * sign_x << " >= " << end_pos.x
    << "=" << std::boolalpha << ((p.x * sign_x) >= end_pos.x)
    << " "
    << p.y * sign_y << " >= "<< end_pos.y
    << "=" << std::boolalpha << ((p.y * sign_y) >= end_pos.y)<<endl;

The exit variable never becomes true. In the console I see:

9435.6 >= 132.6=true 180 >= 180=false

How it can be?

All variables are float. Values are written above. Variables with 180 as value never change.

Answer 1

You haven’t provided example values of p.y and sign_y, so it’s difficult to tell for sure.

But the problem is almost certainly that p.y * sign_y is not exactly equal to 180; however it will be rounded when you print it.

I suspect that if your print the value of (p.y * sign_y) - end_pos.y, the result will not be 0.