Re: [AD] al_get_opengl_version design flaw?

[Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx>]

On November 28, 2010, Thomas Fjellstrom wrote:
> On November 28, 2010, Peter Wang wrote:
> > Quick, what does this program print:
> >     #include <stdio.h>
> >     int main(void)
> >     {
> > 	
> > 	float x = 1.4;
> > 	printf("%d\n", (x>=1.4));
> > 	return 0;
> > 	
> >     }
> > 
> > Is it worth doing something about al_get_opengl_version?
> > I have added a warning to the documentation for now.
> 
> I have this little helper in my little pet Canva5 lib:
> 
> inline bool nearlyEqual(double a, double b, double epsilon = 0.00001)
> {
>    double absA = fabs(a);
>    double absB = fabs(b);
>    double diff = fabs(a - b);
> 
>    if (a * b == 0) { // a or b or both are zero
>       // relative error is not meaningful here
>       return diff < (epsilon * epsilon);
>    } else { // use relative error
>       return diff / (absA + absB) < epsilon;
>    }
> }
> 
> might be useful for cases like this.

Or just return the version in two or three parts.

> > Peter
> > 
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-- 
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx