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Add shadow caster support to LitParticles shader

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Introduced shadow caster texture, color, outside color, and minimum brightness parameters to the LitParticles shader. Moved related variable declarations to Variables.hlsl for reuse and removed redundant declarations from BlendinShader.shader. Updated LitParticles lighting calculation to apply shadow caster effects when appropriate.
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DeMuenu
2025-09-30 01:20:22 +02:00
parent 868e713336
commit 7a3065211e
3 changed files with 25 additions and 8 deletions
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16
Shader/LitParticles.shader
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@@ -9,6 +9,12 @@ Shader "DeMuenu/World/Hoppou/Particles/LitParticles"
//Moonlight
_InverseSqareMultiplier ("Inverse Square Multiplier", Float) = 1
_LightCutoffDistance ("Light Cutoff Distance", Float) = 100
_shadowCasterTex ("Shadow Caster Texture", 2D) = "white" {}
_shadowCasterColor ("Shadow Caster Color", Color) = (1,1,1,1)
_OutSideColor ("Outside Color", Color) = (1,1,1,1)
_MinBrightnessShadow ("Min Brightness for Shadows", Range(0,1)) = 0
//Moonlight END
@@ -36,6 +42,7 @@ Shader "DeMuenu/World/Hoppou/Particles/LitParticles"
#include "Includes/Lambert.hlsl"
#include "Includes/DefaultSetup.hlsl"
#include "Includes/Variables.hlsl"
#include "Includes/Shadowcaster.cginc"
@@ -118,7 +125,14 @@ Shader "DeMuenu/World/Hoppou/Particles/LitParticles"
LightTypeCalculations(_Udon_LightColors, LightCounter, i, NdotL, dIntensity, _Udon_LightPositions[LightCounter].a, _Udon_LightPositions[LightCounter].xyz);
dmax = dmax + contrib * float4(LightColor, 1) * NdotL; // accumulate light contributions
float4 ShadowCasterMult = float4(1,1,1,1);
if (_Udon_ShadowMapIndex[LightCounter] > 0.5) {
ShadowCasterMult = SampleShadowcasterPlane(_Udon_WorldToLocal, _shadowCasterTex, _Udon_LightPositions[LightCounter].xyz, i.worldPos, _OutSideColor);
ShadowCasterMult *= _shadowCasterColor;
ShadowCasterMult = float4(ShadowCasterMult.rgb * (1-ShadowCasterMult.a), 1);
}
dmax = dmax + contrib * float4(LightColor, 1) * 1 * max(ShadowCasterMult, _MinBrightnessShadow);
}