grad() [1/4]

static int32_t grad ( uint8_t hash, int32_t x )

static

Definition at line 74 of file simplex.cpp.

                                             {
    uint8_t h = hash & 15;
    int32_t grad = 1 + (h&7); // Gradient value 1.0, 2.0, ..., 8.0
    if ((h&8) != 0) {
        grad = -grad; // Set a random sign for the gradient
    }
    return grad * x; // Multiply the gradient with the distance (integer * 0.12 = *.12)
}

References grad(), and x.

Referenced by fl::anonymous_namespace{wave.cpp}::BatchDraw::BatchDraw(), grad(), snoise16(), snoise16(), snoise16(), and snoise16().

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