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Add support for multiple shadowcaster planes

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Extended ShadowcasterUpdater and shaders to handle multiple shadowcaster planes by introducing indexed properties and logic for two shadowcaster sets. Updated property names and shader logic to support per-index shadowcaster textures, colors, and brightness, enabling more flexible shadow casting in scenes.
This commit is contained in:
DeMuenu
2025-09-30 12:59:56 +02:00
parent 7a3065211e
commit fd5eb748e2
4 changed files with 74 additions and 25 deletions
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25
Scripts/ShadowcasterUpdater.cs
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@@ -9,15 +9,36 @@ public class ShadowcasterUpdater : UdonSharpBehaviour
{
public Renderer[] rendererTargets;
public Texture2D ShadowcasterTexture;
public Color OutsideColor = Color.white;
public Color TextureColor = Color.white;
public float MinBrightness = 0.0f;
public int shadowcasterIndex = 1;
public string propertyName = "_Udon_WorldToLocal";
private MaterialPropertyBlock _mpb;
void Start()
{
_mpb = new MaterialPropertyBlock();
ApplyTextureData();
}
public void ApplyTextureData()
{
foreach (Renderer mat in rendererTargets)
{
if (mat == null) continue;
mat.GetPropertyBlock(_mpb);
_mpb.SetTexture("_Udon_ShadowcasterTex" + "_" + (string)shadowcasterIndex, ShadowcasterTexture);
_mpb.SetColor("_Udon_shadowCasterColor" + "_" + (string)shadowcasterIndex, TextureColor);
_mpb.SetColor("_Udon_OutSideColor" + "_" + (string)shadowcasterIndex, OutsideColor);
_mpb.SetFloat("_Udon_MinBrightnessShadow" + "_" + (string)shadowcasterIndex, MinBrightness);
mat.SetPropertyBlock(_mpb);
}
}
void LateUpdate()
{
var w2l = transform.worldToLocalMatrix;
@@ -27,7 +48,7 @@ public class ShadowcasterUpdater : UdonSharpBehaviour
{
if (mat == null) continue;
mat.GetPropertyBlock(_mpb);
_mpb.SetMatrix(propertyName, w2l);
_mpb.SetMatrix(propertyName + "_" + (string)shadowcasterIndex, w2l);
mat.SetPropertyBlock(_mpb);
}

32
Shader/BlendinShader.shader
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@@ -92,6 +92,17 @@ Shader "DeMuenu/World/Hoppou/RevealStandart"
MoonlightGlobalVariables
float4x4 _Udon_WorldToLocal_1;
sampler2D _Udon_shadowCasterTex_1;
float4 _Udon_shadowCasterColor_1;
float4 _Udon_OutSideColor_1;
float _Udon_MinBrightnessShadow_1;
float4x4 _Udon_WorldToLocal_2;
sampler2D _Udon_shadowCasterTex_2;
float4 _Udon_shadowCasterColor_2;
float4 _Udon_OutSideColor_2;
float _Udon_MinBrightnessShadow_2;
v2f vert (appdata v)
{
@@ -148,15 +159,22 @@ Shader "DeMuenu/World/Hoppou/RevealStandart"
LightTypeCalculations(_Udon_LightColors, LightCounter, i, NdotL, dIntensity, _Udon_LightPositions[LightCounter].a, _Udon_LightPositions[LightCounter].xyz);
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);
float4 ShadowCasterMult_1 = float4(1,1,1,1);
float4 ShadowCasterMult_2 = float4(1,1,1,1);
if (((_Udon_ShadowMapIndex[LightCounter] > 0.5) && (_Udon_ShadowMapIndex[LightCounter] < 1.5)) || (_Udon_ShadowMapIndex[LightCounter] > 2.5)) {
ShadowCasterMult_1 = SampleShadowcasterPlane(_Udon_WorldToLocal_1, _Udon_shadowCasterTex_1, _Udon_LightPositions[LightCounter].xyz, i.worldPos, _Udon_OutSideColor_1);
ShadowCasterMult_1 *= _Udon_shadowCasterColor_1;
ShadowCasterMult_1 = float4(ShadowCasterMult_1.rgb * (1-ShadowCasterMult_1.a), 1);
ShadowCasterMult_1 = max(ShadowCasterMult_1, _Udon_MinBrightnessShadow_1)
}
if (_Udon_ShadowMapIndex[LightCounter] > 1.5) {
ShadowCasterMult_2 = SampleShadowcasterPlane(_Udon_WorldToLocal_2, _Udon_shadowCasterTex_2, _Udon_LightPositions[LightCounter].xyz, i.worldPos, _Udon_OutSideColor_2);
ShadowCasterMult_2 *= _Udon_shadowCasterColor_2;
ShadowCasterMult_2 = float4(ShadowCasterMult_2.rgb * (1-ShadowCasterMult_2.a), 1);
ShadowCasterMult_2 = max(ShadowCasterMult_2, _Udon_MinBrightnessShadow_2)
}
dmax = dmax + contrib * float4(LightColor, 1) * NdotL * max(ShadowCasterMult, _MinBrightnessShadow);
dmax = dmax + contrib * float4(LightColor, 1) * ShadowCasterMult_1 * ShadowCasterMult_2;
}

8
Shader/Includes/Variables.hlsl
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@@ -11,12 +11,4 @@
float _Udon_ShadowMapIndex[MAX_LIGHTS];\
float _Udon_PlayerCount; /* set via SetFloat */ \
float4x4 _Udon_WorldToLocal; \
sampler2D _shadowCasterTex; \
float4 _shadowCasterColor; \
float4 _OutSideColor; \
float _MinBrightnessShadow; \
#endif

34
Shader/LitParticles.shader
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@@ -85,6 +85,17 @@ Shader "DeMuenu/World/Hoppou/Particles/LitParticles"
MoonlightGlobalVariables
float4x4 _Udon_WorldToLocal_1;
sampler2D _Udon_shadowCasterTex_1;
float4 _Udon_shadowCasterColor_1;
float4 _Udon_OutSideColor_1;
float _Udon_MinBrightnessShadow_1;
float4x4 _Udon_WorldToLocal_2;
sampler2D _Udon_shadowCasterTex_2;
float4 _Udon_shadowCasterColor_2;
float4 _Udon_OutSideColor_2;
float _Udon_MinBrightnessShadow_2;
v2f vert (appdata v)
{
@@ -121,18 +132,25 @@ Shader "DeMuenu/World/Hoppou/Particles/LitParticles"
InLoopSetup(_Udon_LightPositions, LightCounter, count, i); //defines distanceFromLight, contrib
Lambert(_Udon_LightPositions[LightCounter].xyz ,i, N); //defines NdotL
LightTypeCalculations(_Udon_LightColors, LightCounter, i, NdotL, dIntensity, _Udon_LightPositions[LightCounter].a, _Udon_LightPositions[LightCounter].xyz);
LightTypeCalculations(_Udon_LightColors, LightCounter, i, 1, dIntensity, _Udon_LightPositions[LightCounter].a, _Udon_LightPositions[LightCounter].xyz);
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);
float4 ShadowCasterMult_1 = float4(1,1,1,1);
float4 ShadowCasterMult_2 = float4(1,1,1,1);
if (((_Udon_ShadowMapIndex[LightCounter] > 0.5) && (_Udon_ShadowMapIndex[LightCounter] < 1.5)) || (_Udon_ShadowMapIndex[LightCounter] > 2.5)) {
ShadowCasterMult_1 = SampleShadowcasterPlane(_Udon_WorldToLocal_1, _Udon_shadowCasterTex_1, _Udon_LightPositions[LightCounter].xyz, i.worldPos, _Udon_OutSideColor_1);
ShadowCasterMult_1 *= _Udon_shadowCasterColor_1;
ShadowCasterMult_1 = float4(ShadowCasterMult_1.rgb * (1-ShadowCasterMult_1.a), 1);
ShadowCasterMult_1 = max(ShadowCasterMult_1, _Udon_MinBrightnessShadow_1)
}
if (_Udon_ShadowMapIndex[LightCounter] > 1.5) {
ShadowCasterMult_2 = SampleShadowcasterPlane(_Udon_WorldToLocal_2, _Udon_shadowCasterTex_2, _Udon_LightPositions[LightCounter].xyz, i.worldPos, _Udon_OutSideColor_2);
ShadowCasterMult_2 *= _Udon_shadowCasterColor_2;
ShadowCasterMult_2 = float4(ShadowCasterMult_2.rgb * (1-ShadowCasterMult_2.a), 1);
ShadowCasterMult_2 = max(ShadowCasterMult_2, _Udon_MinBrightnessShadow_2)
}
dmax = dmax + contrib * float4(LightColor, 1) * 1 * max(ShadowCasterMult, _MinBrightnessShadow);
dmax = dmax + contrib * float4(LightColor, 1) * ShadowCasterMult1 * ShadowCasterMult_2;
}