From b6085c8f1cf6a8f60906a2a9e0f6c84dfbc010ad Mon Sep 17 00:00:00 2001
From: a dinosaur <dino@a-dinosaur.com>
Date: Mon, 9 Sep 2024 04:11:26 +1000
Subject: [PATCH] switch permutation type to ubyte

---
 Sources/Voxelotl/Noise/CoherentNoise.swift        | 2 +-
 Sources/Voxelotl/Noise/LayeredNoise.swift         | 2 +-
 Sources/Voxelotl/Noise/PerlinNoiseGenerator.swift | 6 +++---
 Sources/Voxelotl/Noise/SimplexNoise.swift         | 6 +++---
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Sources/Voxelotl/Noise/CoherentNoise.swift b/Sources/Voxelotl/Noise/CoherentNoise.swift
index 217a12c..fe27cf4 100644
--- a/Sources/Voxelotl/Noise/CoherentNoise.swift
+++ b/Sources/Voxelotl/Noise/CoherentNoise.swift
@@ -7,7 +7,7 @@ public protocol CoherentNoiseRandomInit: CoherentNoise {
 }
 
 public protocol CoherentNoiseTableInit: CoherentNoise {
-  init(permutation: [Int16])
+  init(permutation: [UInt8])
 }
 
 public protocol CoherentNoise2D: CoherentNoise {
diff --git a/Sources/Voxelotl/Noise/LayeredNoise.swift b/Sources/Voxelotl/Noise/LayeredNoise.swift
index 5ddee24..19300ab 100644
--- a/Sources/Voxelotl/Noise/LayeredNoise.swift
+++ b/Sources/Voxelotl/Noise/LayeredNoise.swift
@@ -20,7 +20,7 @@ public extension LayeredNoise where Generator: CoherentNoiseRandomInit {
 }
 
 public extension LayeredNoise where Generator: CoherentNoiseTableInit {
-  init(permutation table: [Int16], octaves: Int, frequency: Scalar, amplitude: Scalar = 1) {
+  init(permutation table: [UInt8], octaves: Int, frequency: Scalar, amplitude: Scalar = 1) {
     self.octaves   = octaves
     self.frequency = frequency
     self.amplitude = amplitude
diff --git a/Sources/Voxelotl/Noise/PerlinNoiseGenerator.swift b/Sources/Voxelotl/Noise/PerlinNoiseGenerator.swift
index 511d649..cc86857 100644
--- a/Sources/Voxelotl/Noise/PerlinNoiseGenerator.swift
+++ b/Sources/Voxelotl/Noise/PerlinNoiseGenerator.swift
@@ -1,15 +1,15 @@
 import Foundation
 
 public struct ImprovedPerlin<Scalar: BinaryFloatingPoint & SIMDScalar>: CoherentNoise2D, CoherentNoise3D, CoherentNoiseRandomInit, CoherentNoiseTableInit {
-  private let p: [Int16]
+  private let p: [UInt8]
 
-  public init(permutation: [Int16]) {
+  public init(permutation: [UInt8]) {
     assert(permutation.count == 0x100)
     self.p = permutation
   }
 
   public init<Random: RandomProvider>(random: inout Random) {
-    self.p = (0..<0x100).map { Int16($0) }.shuffled(using: &random)
+    self.p = (0..<0x100).map { UInt8($0) }.shuffled(using: &random)
   }
 
   public func get(_ point: SIMD2<Scalar>) -> Scalar {
diff --git a/Sources/Voxelotl/Noise/SimplexNoise.swift b/Sources/Voxelotl/Noise/SimplexNoise.swift
index 8708bbf..0c22611 100644
--- a/Sources/Voxelotl/Noise/SimplexNoise.swift
+++ b/Sources/Voxelotl/Noise/SimplexNoise.swift
@@ -1,16 +1,16 @@
 import Foundation
 
 public struct SimplexNoise<Scalar: BinaryFloatingPoint & SIMDScalar>: CoherentNoise2D, CoherentNoise3D, CoherentNoise4D, CoherentNoiseRandomInit, CoherentNoiseTableInit {
-  private let p: [Int16], pMod12: [Int16]
+  private let p: [UInt8], pMod12: [UInt8]
 
-  public init(permutation: [Int16]) {
+  public init(permutation: [UInt8]) {
     assert(permutation.count == 0x100)
     self.p = permutation
     self.pMod12 = self.p.map { $0 % 12 }
   }
 
   public init<Random: RandomProvider>(random: inout Random) {
-    self.p = (0..<0x100).map { Int16($0) }.shuffled(using: &random)
+    self.p = (0..<0x100).map { UInt8($0) }.shuffled(using: &random)
     self.pMod12 = self.p.map { $0 % 12 }
   }