grad16() [1/3]

static int16_t grad16 ( uint8_t hash, int16_t x )

inlinestatic

Definition at line 148 of file noise.cpp.

                                                                                     {
    hash = hash & 15;
    int16_t 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 x.