升级水插件

2026-01-08 22:30:55 +08:00
parent febff82d24
commit ca68084264
415 changed files with 18138 additions and 7134 deletions
--- a/Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Utility/Shadows.hlsl
+++ b/Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Utility/Shadows.hlsl
@@ -0,0 +1,85 @@
+// Crest Water System
+// Copyright © 2024 Wave Harmonic. All rights reserved.
+
+#ifndef CREST_SHADOWS_H
+#define CREST_SHADOWS_H
+
+#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Macros.hlsl"
+#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Globals.hlsl"
+
+#if CREST_BIRP
+TEXTURE2D_X(_Crest_ScreenSpaceShadowTexture);
+float4 _Crest_ScreenSpaceShadowTexture_TexelSize;
+#endif // CREST_BIRP
+
+#if CREST_URP
+#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
+#endif // CREST_URP
+
+#if CREST_HDRP
+#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
+
+#ifndef SHADERGRAPH_PREVIEW
+#if CREST_HDRP_FORWARD_PASS
+#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Lighting/LightLoop/HDShadow.hlsl"
+#endif // CREST_HDRP_FORWARD_PASS
+#endif // SHADERGRAPH_PREVIEW
+#endif // CREST_HDRP
+
+m_CrestNameSpace
+
+// Position: SRP = WS / BIRP = SS (z ignored)
+half PrimaryLightShadows(const float3 i_Position, const float2 i_ScreenPosition)
+{
+    // Unshadowed.
+    half shadow = 1;
+
+#if CREST_URP
+    // We could skip GetMainLight but this is recommended approach which is likely more robust to API changes.
+    float4 shadowCoord = TransformWorldToShadowCoord(i_Position);
+    Light light = GetMainLight(TransformWorldToShadowCoord(i_Position));
+    shadow = light.shadowAttenuation;
+#endif
+
+#ifndef SHADERGRAPH_PREVIEW
+#if CREST_HDRP_FORWARD_PASS
+    DirectionalLightData light = _DirectionalLightDatas[_DirectionalShadowIndex];
+    HDShadowContext context = InitShadowContext();
+    context.directionalShadowData = _HDDirectionalShadowData[_DirectionalShadowIndex];
+
+    float3 positionWS = GetCameraRelativePositionWS(i_Position);
+    // From Unity:
+    // > With XR single-pass and camera-relative: offset position to do lighting computations from the combined center view (original camera matrix).
+    // > This is required because there is only one list of lights generated on the CPU. Shadows are also generated once and shared between the instanced views.
+    ApplyCameraRelativeXR(positionWS);
+
+    // TODO: Pass in screen space position and scene normal.
+    shadow = GetDirectionalShadowAttenuation
+    (
+        context,
+        0, // positionSS
+        positionWS,
+        0, // normalWS
+        light.shadowIndex,
+        -light.forward
+    );
+
+    // Apply shadow strength from main light.
+    shadow = LerpWhiteTo(shadow, light.shadowDimmer);
+#endif // CREST_HDRP_FORWARD_PASS
+#endif // SHADERGRAPH_PREVIEW
+
+#if CREST_BIRP
+    shadow = LOAD_TEXTURE2D_X(_Crest_ScreenSpaceShadowTexture, min(i_ScreenPosition, _Crest_ScreenSpaceShadowTexture_TexelSize.zw - 1.0)).r;
+#if DIRECTIONAL_COOKIE
+    const half attenuation = tex2D(_LightTexture0, mul(unity_WorldToLight, float4(i_Position, 1.0)).xy).w;
+    shadow = min(attenuation, shadow);
+#endif
+#endif
+
+    return shadow;
+}
+
+m_CrestNameSpaceEnd
+
+#endif