kronic
593897d978
ProjectM/EmissiveGloam — URP HLSL, HDR emission (Bloom-catching), with the readability 'steady=true / flicker=false' channel as a material param (_FlickerAmount), no script. Applied to the staging flora bulbs (cold, flicker). The other two master shaders already exist (Lit URP graph, AnimatedLitShader). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
58 lines
2.2 KiB
Plaintext
58 lines
2.2 KiB
Plaintext
// Emissive-Gloam — the LANTERN "true vs false light" master shader.
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// One shader is the whole palette rule: hue = warm(ours)/cold(gloam)/lure; and the
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// load-bearing readability channel is CADENCE — _FlickerAmount 0 = STEADY (true light),
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// >0 = guttering FALSE light. Flicker lives in-shader (uses _Time), so it needs no script
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// and reads in edit + play. HDR emission so URP Bloom catches it. Unlit: these are glows.
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Shader "ProjectM/EmissiveGloam"
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{
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Properties
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{
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[HDR] _EmissionColor ("Emission (HDR)", Color) = (0.1, 0.8, 0.5, 1)
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_FlickerAmount ("Flicker Amount (0=steady/true, 1=false)", Range(0,1)) = 0.0
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_FlickerSpeed ("Flicker Speed", Float) = 6.0
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_Seed ("Per-material phase seed", Float) = 0.0
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" "RenderPipeline"="UniversalPipeline" "Queue"="Geometry" }
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Pass
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{
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Name "EmissiveGloamUnlit"
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Tags { "LightMode"="UniversalForward" }
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HLSLPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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struct Attributes { float4 positionOS : POSITION; };
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struct Varyings { float4 positionHCS : SV_POSITION; };
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CBUFFER_START(UnityPerMaterial)
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half4 _EmissionColor;
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half _FlickerAmount;
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half _FlickerSpeed;
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half _Seed;
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CBUFFER_END
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Varyings vert (Attributes IN)
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{
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Varyings OUT;
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OUT.positionHCS = TransformObjectToHClip(IN.positionOS.xyz);
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return OUT;
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}
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half4 frag (Varyings IN) : SV_Target
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{
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float t = _Time.y * _FlickerSpeed + _Seed;
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// layered sines -> an organic guttering wave in [-1,1]
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float wave = 0.6 * sin(t) + 0.4 * sin(t * 2.37 + 1.3);
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// f = 1 when steady (_FlickerAmount==0); dips toward (1-_FlickerAmount) as it gutters
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float f = 1.0 - _FlickerAmount * (0.5 - 0.5 * wave);
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return half4(_EmissionColor.rgb * f, 1.0);
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}
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ENDHLSL
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}
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}
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Fallback Off
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}
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