grad16() [1/3]

static fl::i16 grad16 ( fl::u8 hash, fl::i16 x )

inlinestatic

Definition at line 159 of file noise.cpp.hpp.

                                                                                           {
    hash = hash & 15;
    fl::i16 u,v;
    if(hash > 8) { u=x;v=x; }
    else if(hash < 4) { u=x;v=1; }
    else { u=1;v=x; }
    if(hash&1) { u = -u; }
    if(hash&2) { v = -v; }
 
    return AVG15(u,v);
}

References FL_NO_EXCEPT, and x.