grad() [3/4]

static fl::i32 grad ( fl::u8 hash, fl::i32 x, fl::i32 y, fl::i32 z )

static

Definition at line 91 of file simplex.cpp.hpp.

                                                                     {
    fl::i32 h = hash & 15;                                // Convert low 4 bits of hash code into 12 simple
    fl::i32 u = h < 8 ? x : y;                            // gradient directions, and compute dot product.
    fl::i32 v = h < 4 ? y : (h == 12 || h == 14 ? x : z); // Fix repeats at h = 12 to 15
    return ((h&1) != 0 ? -u : u) + ((h&2) != 0 ? -v : v);
}

References FL_NO_EXCEPT, x, y, and z.