Strange results with floating-point comparison

Question

I have this simple test:

double h;
...
// code that assigns h its initial value, used below
...
if ((h>0) && (h<1)){
 //branch 1 -some computati         


        

Answer 1

You may be very interested in the Numerical Robustness for Geometric Calculations (aka "EPSILON is NOT 0.00001!") talk given at GDC 2005.