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71 行
1.9 KiB
71 行
1.9 KiB
using System.Reflection;
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namespace UnityEngine.MaterialGraph
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{
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[Title("Procedural/Voronoi Noise")]
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public class VoronoiNoiseNode : CodeFunctionNode
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{
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public VoronoiNoiseNode()
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{
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name = "VoronoiNoise";
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}
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protected override MethodInfo GetFunctionToConvert()
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{
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return GetType().GetMethod("Unity_VoronoiNoise", BindingFlags.Static | BindingFlags.NonPublic);
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}
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static string Unity_VoronoiNoise(
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[Slot(0, Binding.MeshUV0)] Vector2 uv,
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[Slot(1, Binding.None, 2.0f, 0,0,0)] Vector1 angleOffset,
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[Slot(2, Binding.None)] out Vector1 n1,
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[Slot(2, Binding.None)] out Vector1 n2,
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[Slot(2, Binding.None)] out Vector1 n3)
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{
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return
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@"
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{
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float2 g = floor(uv);
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float2 f = frac(uv);
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float t = 8.0;
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float3 res = float3(8.0, 0.0, 0.0);
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for(int y=-1; y<=1; y++)
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{
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for(int x=-1; x<=1; x++)
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{
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float2 lattice = float2(x,y);
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float2 offset = unity_voronoi_noise_randomVector(lattice + g, angleOffset);
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float d = distance(lattice + offset, f);
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if(d < res.x)
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{
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res = float3(d, offset.x, offset.y);
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n1 = res.x;
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n2 = res.y;
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n3 = 1.0 - res.x;
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}
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}
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}
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}
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";
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}
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public override void GenerateNodeFunction(ShaderGenerator visitor, GenerationMode generationMode)
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{
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var preamble = @"
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inline float2 unity_voronoi_noise_randomVector (float2 uv, float offset)
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{
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float2x2 m = float2x2(15.27, 47.63, 99.41, 89.98);
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uv = frac(sin(mul(uv, m)) * 46839.32);
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return float2(sin(uv.y*+offset)*0.5+0.5, cos(uv.x*offset)*0.5+0.5);
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}
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";
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visitor.AddShaderChunk(preamble, true);
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base.GenerateNodeFunction(visitor, generationMode);
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}
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}
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}
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