191 lines
6.0 KiB
HLSL
191 lines
6.0 KiB
HLSL
// Curved World <http://u3d.as/1W8h>
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// Copyright (c) Amazing Assets <https://amazingassets.world>
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#ifndef UNITY_STANDARD_PARTICLE_SHADOW_INCLUDED
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#define UNITY_STANDARD_PARTICLE_SHADOW_INCLUDED
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// NOTE: had to split shadow functions into separate file,
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// otherwise compiler gives trouble with LIGHTING_COORDS macro (in UnityStandardCore.cginc)
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#if _REQUIRE_UV2
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#define _FLIPBOOK_BLENDING 1
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#endif
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#include "UnityCG.cginc"
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#include "UnityShaderVariables.cginc"
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#include "UnityStandardConfig.cginc"
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#include "UnityStandardUtils.cginc"
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#include "UnityStandardParticleInstancing.cginc"
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#include "../../Core/CurvedWorldTransform.cginc"
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#if (defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)) && defined(UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS)
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#define UNITY_STANDARD_USE_DITHER_MASK 1
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#endif
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// Need to output UVs in shadow caster, since we need to sample texture and do clip/dithering based on it
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#if defined(_ALPHATEST_ON) || defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
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#define UNITY_STANDARD_USE_SHADOW_UVS 1
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#endif
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// Has a non-empty shadow caster output struct (it's an error to have empty structs on some platforms...)
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#if !defined(V2F_SHADOW_CASTER_NOPOS_IS_EMPTY) || defined(UNITY_STANDARD_USE_SHADOW_UVS)
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#define UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT 1
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#endif
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#ifdef UNITY_STEREO_INSTANCING_ENABLED
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#define UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT 1
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#endif
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#ifdef _ALPHATEST_ON
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half _Cutoff;
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#endif
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sampler2D _MainTex;
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float4 _MainTex_ST;
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#ifdef UNITY_STANDARD_USE_DITHER_MASK
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sampler3D _DitherMaskLOD;
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#endif
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// Handle PremultipliedAlpha from Fade or Transparent shading mode
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half _Metallic;
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#ifdef _METALLICGLOSSMAP
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sampler2D _MetallicGlossMap;
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#endif
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half MetallicSetup_ShadowGetOneMinusReflectivity(half2 uv)
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{
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half metallicity = _Metallic;
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#ifdef _METALLICGLOSSMAP
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metallicity = tex2D(_MetallicGlossMap, uv).r;
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#endif
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return OneMinusReflectivityFromMetallic(metallicity);
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}
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struct VertexInput
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{
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float4 vertex : POSITION;
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float3 normal : NORMAL;
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fixed4 color : COLOR;
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#if defined(_FLIPBOOK_BLENDING) && !defined(UNITY_PARTICLE_INSTANCING_ENABLED)
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float4 texcoords : TEXCOORD0;
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float texcoordBlend : TEXCOORD1;
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#else
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float2 texcoords : TEXCOORD0;
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#endif
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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struct VertexOutputShadowCaster
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{
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V2F_SHADOW_CASTER_NOPOS
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#ifdef UNITY_STANDARD_USE_SHADOW_UVS
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float2 texcoord : TEXCOORD1;
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#ifdef _FLIPBOOK_BLENDING
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float3 texcoord2AndBlend : TEXCOORD2;
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#endif
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fixed4 color : TEXCOORD3;
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#endif
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};
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#endif
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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struct VertexOutputStereoShadowCaster
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{
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UNITY_VERTEX_OUTPUT_STEREO
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};
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#endif
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// We have to do these dances of outputting SV_POSITION separately from the vertex shader,
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// and inputting VPOS in the pixel shader, since they both map to "POSITION" semantic on
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// some platforms, and then things don't go well.
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void vertParticleShadowCaster (VertexInput v,
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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out VertexOutputShadowCaster o,
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#endif
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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out VertexOutputStereoShadowCaster os,
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#endif
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out float4 opos : SV_POSITION)
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{
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UNITY_SETUP_INSTANCE_ID(v);
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#ifdef UNITY_STANDARD_USE_STEREO_SHADOW_OUTPUT_STRUCT
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(os);
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#endif
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#if defined(CURVEDWORLD_IS_INSTALLED) && !defined(CURVEDWORLD_DISABLED_ON)
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CURVEDWORLD_TRANSFORM_VERTEX(v.vertex)
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#endif
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TRANSFER_SHADOW_CASTER_NOPOS(o,opos)
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#ifdef UNITY_STANDARD_USE_SHADOW_UVS
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#ifdef _FLIPBOOK_BLENDING
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#ifdef UNITY_PARTICLE_INSTANCING_ENABLED
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vertInstancingUVs(v.texcoords.xy, o.texcoord, o.texcoord2AndBlend);
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#else
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o.texcoord = v.texcoords.xy;
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o.texcoord2AndBlend.xy = v.texcoords.zw;
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o.texcoord2AndBlend.z = v.texcoordBlend;
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#endif
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#else
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#ifdef UNITY_PARTICLE_INSTANCING_ENABLED
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vertInstancingUVs(v.texcoords.xy, o.texcoord);
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o.texcoord = TRANSFORM_TEX(o.texcoord, _MainTex);
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#else
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o.texcoord = TRANSFORM_TEX(v.texcoords.xy, _MainTex);
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#endif
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#endif
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o.color = v.color;
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#endif
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}
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half4 fragParticleShadowCaster (
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#ifdef UNITY_STANDARD_USE_SHADOW_OUTPUT_STRUCT
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VertexOutputShadowCaster i
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#endif
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#ifdef UNITY_STANDARD_USE_DITHER_MASK
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, UNITY_VPOS_TYPE vpos : VPOS
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#endif
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) : SV_Target
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{
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#ifdef UNITY_STANDARD_USE_SHADOW_UVS
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half alpha = tex2D(_MainTex, i.texcoord).a;
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#ifdef _FLIPBOOK_BLENDING
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half alpha2 = tex2D(_MainTex, i.texcoord2AndBlend.xy).a;
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alpha = lerp(alpha, alpha2, i.texcoord2AndBlend.z);
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#endif
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alpha *= i.color.a;
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#ifdef _ALPHATEST_ON
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clip (alpha - _Cutoff);
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#endif
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#if defined(_ALPHABLEND_ON) || defined(_ALPHAPREMULTIPLY_ON)
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#ifdef _ALPHAPREMULTIPLY_ON
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half outModifiedAlpha;
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PreMultiplyAlpha(half3(0, 0, 0), alpha, MetallicSetup_ShadowGetOneMinusReflectivity(i.texcoord), outModifiedAlpha);
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alpha = outModifiedAlpha;
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#endif
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#ifdef UNITY_STANDARD_USE_DITHER_MASK
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// Use dither mask for alpha blended shadows, based on pixel position xy
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// and alpha level. Our dither texture is 4x4x16.
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half alphaRef = tex3D(_DitherMaskLOD, float3(vpos.xy*0.25,alpha*0.9375)).a;
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clip (alphaRef - 0.01);
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#else
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clip (alpha - 0.5);
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#endif
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#endif
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#endif // UNITY_STANDARD_USE_SHADOW_UVS)
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SHADOW_CASTER_FRAGMENT(i)
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}
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#endif // UNITY_STANDARD_PARTICLE_SHADOW_INCLUDED
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