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Diffstat (limited to 'Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_VoronoiNode.shader')
| -rw-r--r-- | Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_VoronoiNode.shader | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_VoronoiNode.shader b/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_VoronoiNode.shader new file mode 100644 index 00000000..81543702 --- /dev/null +++ b/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_VoronoiNode.shader @@ -0,0 +1,251 @@ +Shader "Hidden/VoronoiNode" +{ + Properties + { + _A("_RGB", 2D) = "white" {} + _B("_RGB", 2D) = "white" {} + _C("_RGB", 2D) = "white" {} + _D ("_RGB", 2D) = "white" {} + _UseTileScale("_UseTileScale", Float) = 0 + _TileScale ("_TileScale", Int) = 1 + _MinkowskiPower("_MinkowskiPower", Float) = 0 + _DistFunc("_DistFunc", Int) = 0 + _MethodType("_MethodType", Int) = 0 + _SearchQuality("_SearchQuality", Int) = 1 + _Octaves("_Octaves", Int) = 1 + _UseSmoothness("_UseSmoothness", Int ) = 0 + } + SubShader + { + Tags { "RenderType"="Opaque" } + CGINCLUDE + sampler2D _A; + sampler2D _B; + sampler2D _C; + sampler2D _D; + float _UseTileScale = 0; + int _TileScale = 1; + float _MinkowskiPower = 1; + int _DistFunc = 0; + int _MethodType = 0; + int _SearchQuality = 0; + int _Octaves = 1; + int _PreviewID = 0; + int _UseSmoothness = 0; + + float2 VoronoiHash( float2 p ) + { + p = lerp( p, p - _TileScale * floor (p / _TileScale), _UseTileScale ); + p = float2(dot (p, float2(127.1, 311.7)), dot (p, float2(269.5, 183.3))); + return frac (sin (p) *43758.5453); + } + + float Voronoi( float2 v, float time, inout float2 id , float smoothness ) + { + float2 n = floor(v); + float2 f = frac(v); + float F1 = 8.0; + float F2 = 8.0; + float2 mr = 0; + float2 mg = 0; + for (int j = -_SearchQuality; j <= _SearchQuality; j++) + { + for (int i = -_SearchQuality; i <= _SearchQuality; i++) + { + float2 g = float2(i, j); + float2 o = VoronoiHash (n + g); + o = (sin (time + o * 6.2831) * 0.5 + 0.5); float2 r = g - f + o; + float d = 0; + //Euclidean^2 + if (_DistFunc == 0) + { + d = 0.5 * dot (r, r); + } + //Euclidean + else if (_DistFunc == 1) + { + d = 0.707 * sqrt (dot (r, r)); + } + //Manhattan + else if (_DistFunc == 2) + { + d = 0.5 * (abs (r.x) + abs (r.y)); + } + //Chebyshev + else if (_DistFunc == 3) + { + d = max (abs (r.x), abs (r.y)); + } + //Minkowski + else if (_DistFunc == 4) + { + d = (1 / pow(2, 1 / _MinkowskiPower)) * pow( ( pow( abs( r.x ), _MinkowskiPower) + pow( abs( r.y ), _MinkowskiPower) ), (1 / _MinkowskiPower)); + } + + if (_MethodType == 0 && _UseSmoothness == 1) + { + float h = smoothstep (0.0, 1.0, 0.5 + 0.5 * (F1 - d) / smoothness); + F1 = lerp (F1, d, h) - smoothness * h * (1.0 - h); + mg = g; mr = r; id = o; + } + else + { + if (d < F1) + { + F2 = F1; + F1 = d; mg = g; mr = r; id = o; + } + else if (d < F2) + { + F2 = d; + } + + } + + } + } + + //Cells + if(_MethodType == 0) + { + return F1; + } + //Crystal + else if (_MethodType == 1) + { + return F2; + } + //Glass + else if (_MethodType == 2) + { + return F2 - F1; + } + //Caustic + else if (_MethodType == 3) + { + return (F2 + F1) * 0.5; + } + //Distance + else if (_MethodType == 4) + { + F1 = 8.0; + for (int j = -2; j <= 2; j++) + { + for (int i = -2; i <= 2; i++) + { + float2 g = mg + float2(i, j); + float2 o = VoronoiHash (n + g); + o = ( sin (time + o * 6.2831) * 0.5 + 0.5); + float2 r = g - f + o; + float d = dot (0.5 * (mr + r), normalize (r - mr)); + F1 = min (F1, d); + } + } + return F1; + } + else + return F1; + } + + + ENDCG + + Pass // Voronoi - Unity + { + CGPROGRAM + #include "UnityCG.cginc" + #pragma vertex vert_img + #pragma fragment frag + + inline float2 UnityVoronoiRandomVector (float2 UV, float offset) + { + float2x2 m = float2x2(15.27, 47.63, 99.41, 89.98); + UV = frac (sin (mul (UV, m)) * 46839.32); + return float2(sin (UV.y* +offset) * 0.5 + 0.5, cos (UV.x* offset) * 0.5 + 0.5); + } + + //x - Out y - Cells + float3 UnityVoronoi (float2 UV, float AngleOffset, float CellDensity) + { + float2 g = floor (UV * CellDensity); + float2 f = frac (UV * CellDensity); + float t = 8.0; + float3 res = float3(8.0, 0.0, 0.0); + + for (int y = -1; y <= 1; y++) + { + for (int x = -1; x <= 1; x++) + { + float2 lattice = float2(x, y); + float2 offset = UnityVoronoiRandomVector (lattice + g, AngleOffset); + float d = distance (lattice + offset, f); + + if (d < res.x) + { + res = float3(d, offset.x, offset.y); + } + } + } + return res; + } + + float4 frag (v2f_img i) : SV_Target + { + float2 uvValue = tex2D(_A, i.uv).rg; + float angleOffset = tex2D(_B, i.uv).r; + float cellDensity = tex2D(_C, i.uv).r; + float3 voronoiVal = UnityVoronoi( uvValue, angleOffset , cellDensity ); + if( _PreviewID == 1 ) + return float4( voronoiVal.yz, 0, 1 ); + else + return float4( voronoiVal.xxx, 1); + } + ENDCG + } + + Pass // Voronoi - ASE + { + CGPROGRAM + #include "UnityCG.cginc" + #pragma vertex vert_img + #pragma fragment frag + + float4 frag (v2f_img i) : SV_Target + { + float2 uvValue = tex2D (_A, i.uv).rg; + float time = tex2D (_B, i.uv).r; + float scale = tex2D (_C, i.uv).r; + float smoothness = tex2D (_D, i.uv).r; + + float2 id = 0; + float voronoiVal = Voronoi( uvValue*scale,time, id, smoothness ); + if (_Octaves == 1) + { + if( _PreviewID == 1) + return float4( id, 0, 1 ); + else + return float4(voronoiVal.xxx, 1); + } + else + { + float fade = 0.5; + float voroi = 0; + float rest = 0; + for (int it = 0; it < _Octaves; it++) + { + voroi += fade * Voronoi( uvValue*scale, time, id, smoothness); + rest += fade; + uvValue *= 2; + fade *= 0.5; + } + voroi /= rest; + if( _PreviewID == 1 ) + return float4( id, 0, 1 ); + else + return float4(voroi.xxx, 1); + } + } + ENDCG + } + } +} |