A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using Unity.IL2CPP.CompilerServices;
2using static Unity.Mathematics.math;
3
4namespace Unity.Mathematics
5{
6 /// <summary>
7 /// A static class containing noise functions.
8 /// </summary>
9 [Il2CppEagerStaticClassConstruction]
10 public static partial class noise
11 {
12 // Modulo 289 without a division (only multiplications)
13 static float mod289(float x) { return x - floor(x * (1.0f / 289.0f)) * 289.0f; }
14 static float2 mod289(float2 x) { return x - floor(x * (1.0f / 289.0f)) * 289.0f; }
15 static float3 mod289(float3 x) { return x - floor(x * (1.0f / 289.0f)) * 289.0f; }
16 static float4 mod289(float4 x) { return x - floor(x * (1.0f / 289.0f)) * 289.0f; }
17
18 // Modulo 7 without a division
19 static float3 mod7(float3 x) { return x - floor(x * (1.0f / 7.0f)) * 7.0f; }
20 static float4 mod7(float4 x) { return x - floor(x * (1.0f / 7.0f)) * 7.0f; }
21
22 // Permutation polynomial: (34x^2 + x) math.mod 289
23 static float permute(float x) { return mod289((34.0f * x + 1.0f) * x); }
24 static float3 permute(float3 x) { return mod289((34.0f * x + 1.0f) * x); }
25 static float4 permute(float4 x) { return mod289((34.0f * x + 1.0f) * x); }
26
27 static float taylorInvSqrt(float r) { return 1.79284291400159f - 0.85373472095314f * r; }
28 static float4 taylorInvSqrt(float4 r) { return 1.79284291400159f - 0.85373472095314f * r; }
29
30 static float2 fade(float2 t) { return t*t*t*(t*(t*6.0f-15.0f)+10.0f); }
31 static float3 fade(float3 t) { return t*t*t*(t*(t*6.0f-15.0f)+10.0f); }
32 static float4 fade(float4 t) { return t*t*t*(t*(t*6.0f-15.0f)+10.0f); }
33
34 static float4 grad4(float j, float4 ip)
35 {
36 float4 ones = float4(1.0f, 1.0f, 1.0f, -1.0f);
37 float3 pxyz = floor(frac(float3(j) * ip.xyz) * 7.0f) * ip.z - 1.0f;
38 float pw = 1.5f - dot(abs(pxyz), ones.xyz);
39 float4 p = float4(pxyz, pw);
40 float4 s = float4(p < 0.0f);
41 p.xyz = p.xyz + (s.xyz*2.0f - 1.0f) * s.www;
42 return p;
43 }
44
45 // Hashed 2-D gradients with an extra rotation.
46 // (The constant 0.0243902439 is 1/41)
47 static float2 rgrad2(float2 p, float rot)
48 {
49 // For more isotropic gradients, math.sin/math.cos can be used instead.
50 float u = permute(permute(p.x) + p.y) * 0.0243902439f + rot; // Rotate by shift
51 u = frac(u) * 6.28318530718f; // 2*pi
52 return float2(cos(u), sin(u));
53 }
54 }
55}