Raytracing speed again, this time with gdc. -- "oops" remedied

[downs]

downs wrote:
> Jascha Wetzel wrote:
>> also curious: why does the C++ version call Sphere::intersect 12 times
>> more often than the D version?
> 
> I'd like to know that as well. Far as I know, the algorithm's the same.
> I'll add debugging code to find out.
>  --downs

Okay, it's some weird floating point effect around this line: "disc=b*b - v.dot(v) + radius*radius;".
It only happens in very specific conditions; x=430, y=379, d=11.
So whatever it is, responsible for three seconds it is not.
 --downs