mirror of
https://github.com/muskit/H3VR-TNH-Quality-of-Life-Improvements.git
synced 2026-06-03 04:34:26 -07:00
245 lines
11 KiB
HLSL
245 lines
11 KiB
HLSL
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// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
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#ifndef AUTOLIGHT_INCLUDED
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#define AUTOLIGHT_INCLUDED
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#include "HLSLSupport.cginc"
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#include "UnityShadowLibrary.cginc"
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#define unityShadowCoord float
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#define unityShadowCoord2 float2
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#define unityShadowCoord3 float3
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#define unityShadowCoord4 float4
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#define unityShadowCoord4x4 float4x4
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// ----------------
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// Shadow helpers
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// ----------------
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// If none of the keywords are defined, assume directional?
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#if !defined(POINT) && !defined(SPOT) && !defined(DIRECTIONAL) && !defined(POINT_COOKIE) && !defined(DIRECTIONAL_COOKIE)
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#define DIRECTIONAL
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#endif
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// ---- Screen space direction light shadows helpers (any version)
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#if defined (SHADOWS_SCREEN)
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#if defined(UNITY_NO_SCREENSPACE_SHADOWS)
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UNITY_DECLARE_SHADOWMAP(_ShadowMapTexture);
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#define TRANSFER_SHADOW(a) a._ShadowCoord = mul( unity_WorldToShadow[0], mul( unity_ObjectToWorld, v.vertex ) );
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inline fixed unitySampleShadow (unityShadowCoord4 shadowCoord)
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{
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#if defined(SHADOWS_NATIVE)
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fixed shadow = UNITY_SAMPLE_SHADOW(_ShadowMapTexture, shadowCoord.xyz);
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shadow = _LightShadowData.r + shadow * (1-_LightShadowData.r);
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return shadow;
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#else
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unityShadowCoord dist = SAMPLE_DEPTH_TEXTURE(_ShadowMapTexture, shadowCoord.xy);
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// tegra is confused if we use _LightShadowData.x directly
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// with "ambiguous overloaded function reference max(mediump float, float)"
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unityShadowCoord lightShadowDataX = _LightShadowData.x;
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unityShadowCoord threshold = shadowCoord.z;
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return max(dist > threshold, lightShadowDataX);
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#endif
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}
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#else // UNITY_NO_SCREENSPACE_SHADOWS
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UNITY_DECLARE_SCREENSPACE_SHADOWMAP(_ShadowMapTexture);
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#define TRANSFER_SHADOW(a) a._ShadowCoord = ComputeScreenPos(a.pos);
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inline fixed unitySampleShadow (unityShadowCoord4 shadowCoord)
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{
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fixed shadow = UNITY_SAMPLE_SCREEN_SHADOW(_ShadowMapTexture, shadowCoord);
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return shadow;
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}
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#endif
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#define SHADOW_COORDS(idx1) unityShadowCoord4 _ShadowCoord : TEXCOORD##idx1;
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#define SHADOW_ATTENUATION(a) unitySampleShadow(a._ShadowCoord)
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#endif
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// -----------------------------
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// Shadow helpers (5.6+ version)
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// -----------------------------
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// This version depends on having worldPos available in the fragment shader and using that to compute light coordinates.
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// if also supports ShadowMask (separately baked shadows for lightmapped objects)
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half UnityComputeForwardShadows(float2 lightmapUV, float3 worldPos, float4 screenPos)
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{
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//fade value
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float zDist = dot(_WorldSpaceCameraPos - worldPos, UNITY_MATRIX_V[2].xyz);
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float fadeDist = UnityComputeShadowFadeDistance(worldPos, zDist);
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half realtimeToBakedShadowFade = UnityComputeShadowFade(fadeDist);
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//baked occlusion if any
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half shadowMaskAttenuation = UnitySampleBakedOcclusion(lightmapUV, worldPos);
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half realtimeShadowAttenuation = 1.0f;
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//directional realtime shadow
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#if defined (SHADOWS_SCREEN)
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#if defined(UNITY_NO_SCREENSPACE_SHADOWS)
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realtimeShadowAttenuation = unitySampleShadow(mul(unity_WorldToShadow[0], unityShadowCoord4(worldPos, 1)));
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#else
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//Only reached when LIGHTMAP_ON is NOT defined (and thus we use interpolator for screenPos rather than lightmap UVs). See HANDLE_SHADOWS_BLENDING_IN_GI below.
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realtimeShadowAttenuation = unitySampleShadow(screenPos);
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#endif
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#endif
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#if defined(UNITY_FAST_COHERENT_DYNAMIC_BRANCHING) && defined(SHADOWS_SOFT) && !defined(LIGHTMAP_SHADOW_MIXING)
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//avoid expensive shadows fetches in the distance where coherency will be good
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UNITY_BRANCH
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if (realtimeToBakedShadowFade < (1.0f - 1e-2f))
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{
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#endif
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//spot realtime shadow
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#if (defined (SHADOWS_DEPTH) && defined (SPOT))
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unityShadowCoord4 spotShadowCoord = mul(unity_WorldToShadow[0], unityShadowCoord4(worldPos, 1));
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realtimeShadowAttenuation = UnitySampleShadowmap(spotShadowCoord);
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#endif
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//point realtime shadow
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#if defined (SHADOWS_CUBE)
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realtimeShadowAttenuation = UnitySampleShadowmap(worldPos - _LightPositionRange.xyz);
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#endif
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#if defined(UNITY_FAST_COHERENT_DYNAMIC_BRANCHING) && defined(SHADOWS_SOFT) && !defined(LIGHTMAP_SHADOW_MIXING)
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}
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#endif
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return UnityMixRealtimeAndBakedShadows(realtimeShadowAttenuation, shadowMaskAttenuation, realtimeToBakedShadowFade);
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}
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#if defined(HANDLE_SHADOWS_BLENDING_IN_GI) // handles shadows in the depths of the GI function for performance reasons
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# define UNITY_SHADOW_COORDS(idx1) SHADOW_COORDS(idx1)
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# define UNITY_TRANSFER_SHADOW(a, coord) TRANSFER_SHADOW(a)
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) SHADOW_ATTENUATION(a)
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#elif defined(SHADOWS_SCREEN) && !defined(LIGHTMAP_ON) && !defined(UNITY_NO_SCREENSPACE_SHADOWS) // no lightmap uv thus store screenPos instead
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# define UNITY_SHADOW_COORDS(idx1) SHADOW_COORDS(idx1)
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# define UNITY_TRANSFER_SHADOW(a, coord) TRANSFER_SHADOW(a)
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(0, worldPos, a._ShadowCoord)
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#else
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# define UNITY_SHADOW_COORDS(idx1) unityShadowCoord2 _ShadowCoord : TEXCOORD##idx1;
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# if defined(SHADOWS_SHADOWMASK)
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# define UNITY_TRANSFER_SHADOW(a, coord) a._ShadowCoord = coord * unity_LightmapST.xy + unity_LightmapST.zw;
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# if (defined(SHADOWS_DEPTH) || defined(SHADOWS_SCREEN) || defined(SHADOWS_CUBE) || UNITY_LIGHT_PROBE_PROXY_VOLUME)
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(a._ShadowCoord, worldPos, 0)
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# else
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(a._ShadowCoord, 0, 0)
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# endif
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# else
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# define UNITY_TRANSFER_SHADOW(a, coord)
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# if (defined(SHADOWS_DEPTH) || defined(SHADOWS_SCREEN) || defined(SHADOWS_CUBE))
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(0, worldPos, 0)
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# else
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#if UNITY_LIGHT_PROBE_PROXY_VOLUME
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(0, worldPos, 0)
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#else
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# define UNITY_SHADOW_ATTENUATION(a, worldPos) UnityComputeForwardShadows(0, 0, 0)
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#endif
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# endif
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# endif
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#endif
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// Alloy
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// NOTE: Output shadow for forward base pass SHADOWS_SCREEN lightmaps.
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#define A_LIGHT_ATTENUATION(destName, input, worldPos) fixed destName = UNITY_SHADOW_ATTENUATION(input, worldPos); o.PositionWorld = worldPos; o.Shadow = destName;
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#ifdef POINT
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sampler2D _LightTexture0;
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unityShadowCoord4x4 unity_WorldToLight;
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#define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) A_LIGHT_ATTENUATION(destName, input, worldPos)
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#endif
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#ifdef SPOT
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sampler2D _LightTexture0;
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unityShadowCoord4x4 unity_WorldToLight;
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sampler2D _LightTextureB0;
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inline fixed UnitySpotCookie(unityShadowCoord4 LightCoord)
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{
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return tex2D(_LightTexture0, LightCoord.xy / LightCoord.w + 0.5).w;
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}
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inline fixed UnitySpotAttenuate(unityShadowCoord3 LightCoord)
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{
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return tex2D(_LightTextureB0, dot(LightCoord, LightCoord).xx).UNITY_ATTEN_CHANNEL;
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}
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#define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) A_LIGHT_ATTENUATION(destName, input, worldPos)
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#endif
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#ifdef DIRECTIONAL
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#define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) A_LIGHT_ATTENUATION(destName, input, worldPos)
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#endif
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#ifdef POINT_COOKIE
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samplerCUBE _LightTexture0;
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unityShadowCoord4x4 unity_WorldToLight;
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sampler2D _LightTextureB0;
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#define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) A_LIGHT_ATTENUATION(destName, input, worldPos)
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#endif
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#ifdef DIRECTIONAL_COOKIE
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sampler2D _LightTexture0;
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unityShadowCoord4x4 unity_WorldToLight;
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#define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) A_LIGHT_ATTENUATION(destName, input, worldPos)
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#endif
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// -----------------------------
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// Light/Shadow helpers (4.x version)
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// -----------------------------
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// This version computes light coordinates in the vertex shader and passes them to the fragment shader.
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// ---- Spot light shadows
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#if defined (SHADOWS_DEPTH) && defined (SPOT)
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#define SHADOW_COORDS(idx1) unityShadowCoord4 _ShadowCoord : TEXCOORD##idx1;
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#define TRANSFER_SHADOW(a) a._ShadowCoord = mul (unity_WorldToShadow[0], mul(unity_ObjectToWorld,v.vertex));
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#define SHADOW_ATTENUATION(a) UnitySampleShadowmap(a._ShadowCoord)
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#endif
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// ---- Point light shadows
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#if defined (SHADOWS_CUBE)
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#define SHADOW_COORDS(idx1) unityShadowCoord3 _ShadowCoord : TEXCOORD##idx1;
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#define TRANSFER_SHADOW(a) a._ShadowCoord = mul(unity_ObjectToWorld, v.vertex).xyz - _LightPositionRange.xyz;
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#define SHADOW_ATTENUATION(a) UnitySampleShadowmap(a._ShadowCoord)
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#endif
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// ---- Shadows off
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#if !defined (SHADOWS_SCREEN) && !defined (SHADOWS_DEPTH) && !defined (SHADOWS_CUBE)
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#define SHADOW_COORDS(idx1)
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#define TRANSFER_SHADOW(a)
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#define SHADOW_ATTENUATION(a) 1.0
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#endif
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#ifdef POINT
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#define LIGHTING_COORDS(idx1,idx2) unityShadowCoord3 _LightCoord : TEXCOORD##idx1; SHADOW_COORDS(idx2)
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#define TRANSFER_VERTEX_TO_FRAGMENT(a) a._LightCoord = mul(unity_WorldToLight, mul(unity_ObjectToWorld, v.vertex)).xyz; TRANSFER_SHADOW(a)
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#define LIGHT_ATTENUATION(a) (tex2D(_LightTexture0, dot(a._LightCoord,a._LightCoord).rr).UNITY_ATTEN_CHANNEL * SHADOW_ATTENUATION(a))
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#endif
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#ifdef SPOT
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#define LIGHTING_COORDS(idx1,idx2) unityShadowCoord4 _LightCoord : TEXCOORD##idx1; SHADOW_COORDS(idx2)
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#define TRANSFER_VERTEX_TO_FRAGMENT(a) a._LightCoord = mul(unity_WorldToLight, mul(unity_ObjectToWorld, v.vertex)); TRANSFER_SHADOW(a)
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#define LIGHT_ATTENUATION(a) ( (a._LightCoord.z > 0) * UnitySpotCookie(a._LightCoord) * UnitySpotAttenuate(a._LightCoord.xyz) * SHADOW_ATTENUATION(a) )
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#endif
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#ifdef DIRECTIONAL
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#define LIGHTING_COORDS(idx1,idx2) SHADOW_COORDS(idx1)
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#define TRANSFER_VERTEX_TO_FRAGMENT(a) TRANSFER_SHADOW(a)
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#define LIGHT_ATTENUATION(a) SHADOW_ATTENUATION(a)
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#endif
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#ifdef POINT_COOKIE
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#define LIGHTING_COORDS(idx1,idx2) unityShadowCoord3 _LightCoord : TEXCOORD##idx1; SHADOW_COORDS(idx2)
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#define TRANSFER_VERTEX_TO_FRAGMENT(a) a._LightCoord = mul(unity_WorldToLight, mul(unity_ObjectToWorld, v.vertex)).xyz; TRANSFER_SHADOW(a)
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#define LIGHT_ATTENUATION(a) (tex2D(_LightTextureB0, dot(a._LightCoord,a._LightCoord).rr).UNITY_ATTEN_CHANNEL * texCUBE(_LightTexture0, a._LightCoord).w * SHADOW_ATTENUATION(a))
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#endif
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#ifdef DIRECTIONAL_COOKIE
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#define LIGHTING_COORDS(idx1,idx2) unityShadowCoord2 _LightCoord : TEXCOORD##idx1; SHADOW_COORDS(idx2)
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#define TRANSFER_VERTEX_TO_FRAGMENT(a) a._LightCoord = mul(unity_WorldToLight, mul(unity_ObjectToWorld, v.vertex)).xy; TRANSFER_SHADOW(a)
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#define LIGHT_ATTENUATION(a) (tex2D(_LightTexture0, a._LightCoord).w * SHADOW_ATTENUATION(a))
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#endif
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#endif
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