Seeded permutation and gradient tables that back a noise generator.
All noise variants (simplex/perlin, 2D/3D/4D) share this same table shape, so
each generator type is a structural alias of this. gradP holds the 3D
gradients (used by 2D and 3D noise); gradP4 holds the 4D gradients.
Seeded permutation and gradient tables that back a noise generator.
All noise variants (simplex/perlin, 2D/3D/4D) share this same table shape, so each generator type is a structural alias of this.
gradPholds the 3D gradients (used by 2D and 3D noise);gradP4holds the 4D gradients.