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42 行
1.4 KiB
42 行
1.4 KiB
using UnityEngine.Graphing;
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namespace UnityEngine.MaterialGraph
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{
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[Title ("Math/Color/RGBtoLuminance")]
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public class RGBtoLuminance : Function1Input, IGeneratesFunction
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{
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public RGBtoLuminance()
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{
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name = "RGBtoLuminance";
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}
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protected override string GetFunctionName ()
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{
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return "unity_rgbtoluminance_" + precision;
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}
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protected override MaterialSlot GetInputSlot ()
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{
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return new MaterialSlot (InputSlotId, GetInputSlotName (), kInputSlotShaderName, SlotType.Input, SlotValueType.Vector3, Vector4.zero);
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}
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protected override MaterialSlot GetOutputSlot ()
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{
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return new MaterialSlot (OutputSlotId, GetOutputSlotName (), kOutputSlotShaderName, SlotType.Output, SlotValueType.Vector1, Vector4.zero);
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}
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// Convert rgb to luminance with rgb in linear space with sRGB primaries and D65 white point (from PostProcessing)
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public void GenerateNodeFunction (ShaderGenerator visitor, GenerationMode generationMode)
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{
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var outputString = new ShaderGenerator ();
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outputString.AddShaderChunk (GetFunctionPrototype ("arg1"), false);
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outputString.AddShaderChunk ("{", false);
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outputString.Indent ();
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outputString.AddShaderChunk ("return dot(arg1, "+precision+outputDimension+"(0.2126729, 0.7151522, 0.0721750));", false);
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outputString.Deindent ();
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outputString.AddShaderChunk ("}", false);
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visitor.AddShaderChunk (outputString.GetShaderString (0), true);
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}
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}
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}
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