ThreeKingdomsSlingshot/Assets/VFX/_BuiltinPorts/AlphaBlendFlow.shader

// 빌트인 렌더 파이프라인 이식판(삼국지 슬링샷 · 2026-11-09) — 원본 = WL 프로젝트 URP 셰이더 Eric VFX Studio/Resource/Shader/AlphaBlendFlow.shader (Eric/URP_AlphaBlendFlow)
// GUID · 셰이더 이름 · 속성 이름을 원본과 같게 두어 WL 에서 옮겨 온 재질이 그대로 이 셰이더를 쓴다. 계산식 = 원본 Forward 패스 그대로(URP 함수 → UnityCG).
Shader "Eric/URP_AlphaBlendFlow"
{
    Properties
    {
        [MainTexture] _MainTex("Main Texture", 2D) = "white" {}
        [HDR] _TintColor("Tint Color", Color) = (1, 1, 1, 1)
        _FlowSpeed("MainTex Flow Speed", Vector) = (0, 0, 0, 0)
        _Brightness("Brightness Boost", Float) = 1.0
        [Header(Soft Particles)]
        [Toggle(_SOFTPARTICLES_ON)] _SoftParticlesEnabled("Enable Soft Particles", Float) = 0
        _SoftParticlesFadeDistance("Fade Distance", Range(0.01, 10.0)) = 1.0
        [Header(UV Distortion)]
        _DistortionMap("Distortion Map", 2D) = "white" {}
        _DistortionPower("Distortion Power", Range(0, 1)) = 0
        _DistortionSpeed("Distortion Speed", Vector) = (0, 0, 0, 0)
        [Header(Fresnel Rim Light)]
        [Toggle(_FRESNEL_ON)] _UseFresnel("Enable Fresnel", Float) = 0
        [Enum(Normal Based, 0, UV Based, 1)] _FresnelType("Fresnel Type", Float) = 0
        [HDR] _FresnelColor("Fresnel Color", Color) = (1, 1, 0, 1)
        _FresnelIntensity("Fresnel Intensity", Float) = 5.0
        _FresnelWidth("Fresnel Width", Range(0.1, 15.0)) = 5.0
        [Toggle(_FRESNEL_MASK_ON)] _FresnelMasksTexture("Use Fresnel as Texture Mask", Float) = 0
        [Header(Dissolve)]
        [Toggle(_USEPARTICLEALPHADISSOLVE_ON)] _UseAlphaDissolve("Use Alpha as Dissolve", Float) = 0
        _DissolveTex("Dissolve Texture", 2D) = "white" {}
        _DissolveAmount("Dissolve Amount", Range(0, 1)) = 0.0
        _VertexAlphaRef("Alpha Ref", Range(0.01, 1.0)) = 1.0
        [HDR] _DissolveEdgeColor("Dissolve Edge Color", Color) = (1, 0, 0, 1)
        _DissolveEdgeWidth("Dissolve Edge Width", Range(0, 0.2)) = 0.05
        [Header(Overlay)]
        _OverlayTex("Overlay Texture", 2D) = "white" {}
        [HDR] _OverlayColor("Overlay Color", Color) = (1, 1, 1, 1)
        _OverlayFlowSpeed("Overlay Flow Speed", Vector) = (0, 0, 0, 0)
        [Header(Vertex Distort)]
        [Toggle(_VERTEX_DISTORT_ON)] _UseVertexDistort("Enable Vertex Distort", Float) = 0
        _DistortStrength("Vertex Strength", Range(0, 0.5)) = 0.0
        _DistortSpeed("Vertex Speed", Float) = 1.0
        _DistortFrequency("Vertex Frequency", Float) = 2.0
    }
    SubShader
    {
        Tags { "RenderType" = "Transparent" "Queue" = "Transparent" "IgnoreProjector" = "True" "PreviewType" = "Plane" }

        CGINCLUDE
        #include "UnityCG.cginc"
        struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; float3 normal : NORMAL; float4 color : COLOR; };
        struct v2f { float4 pos : SV_POSITION; float2 uv : TEXCOORD0; float4 screenPos : TEXCOORD1; float3 normalWS : TEXCOORD3; float3 viewDirWS : TEXCOORD4; float4 color : COLOR; };
        float4 _MainTex_ST, _DissolveTex_ST, _DistortionMap_ST, _OverlayTex_ST;
        float4 _TintColor, _FlowSpeed, _DistortionSpeed, _FresnelColor, _DissolveEdgeColor, _OverlayColor, _OverlayFlowSpeed;
        float _Brightness, _FresnelWidth, _FresnelIntensity, _DistortStrength, _DistortSpeed, _DistortFrequency, _DistortionPower, _DissolveAmount, _VertexAlphaRef, _DissolveEdgeWidth, _FresnelType, _SoftParticlesFadeDistance;
        sampler2D _MainTex, _DissolveTex, _DistortionMap, _OverlayTex;
        UNITY_DECLARE_DEPTH_TEXTURE(_CameraDepthTexture);

        v2f vert(appdata v)
        {
            v2f o;
            float3 wPos = mul(unity_ObjectToWorld, v.vertex).xyz;
            #ifdef _VERTEX_DISTORT_ON
                v.vertex.xyz += v.normal * sin(_Time.y * _DistortSpeed + (wPos.x + wPos.y + wPos.z) * _DistortFrequency) * _DistortStrength;
            #endif
            o.pos = UnityObjectToClipPos(v.vertex);
            o.screenPos = ComputeScreenPos(o.pos);
            COMPUTE_EYEDEPTH(o.screenPos.z);
            o.uv = v.uv;
            o.color = v.color;
            o.normalWS = UnityObjectToWorldNormal(v.normal);
            o.viewDirWS = _WorldSpaceCameraPos.xyz - wPos;
            return o;
        }

        float SoftFade(v2f i)
        {
            float softFade = 1.0;
            #ifdef _SOFTPARTICLES_ON
                float raw = SAMPLE_DEPTH_TEXTURE_PROJ(_CameraDepthTexture, UNITY_PROJ_COORD(i.screenPos));
                float sceneZ;
                if (unity_OrthoParams.w > 0.5)
                {
                    #if defined(UNITY_REVERSED_Z)
                        raw = 1.0 - raw;
                    #endif
                    sceneZ = lerp(_ProjectionParams.y, _ProjectionParams.z, raw);
                }
                else sceneZ = LinearEyeDepth(raw);
                softFade = saturate((sceneZ - i.screenPos.z) / max(0.01, _SoftParticlesFadeDistance));
            #endif
            return softFade;
        }
        ENDCG

        Pass
        {
            Name "Back"
            Cull Off ZWrite Off Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma shader_feature _SOFTPARTICLES_ON
            #pragma shader_feature _FRESNEL_ON
            #pragma shader_feature _FRESNEL_MASK_ON
            #pragma shader_feature _USEPARTICLEALPHADISSOLVE_ON
            #pragma shader_feature _VERTEX_DISTORT_ON

            float4 frag(v2f i) : SV_Target
            {
                float softFade = SoftFade(i);
                float2 uvOff = (tex2D(_DistortionMap, i.uv * _DistortionMap_ST.xy + _DistortionMap_ST.zw + _DistortionSpeed.xy * _Time.y).rg * 2.0 - 1.0) * _DistortionPower;
                float4 tex = tex2D(_MainTex, i.uv * _MainTex_ST.xy + _MainTex_ST.zw + _FlowSpeed.xy * _Time.y + uvOff);
                float4 over = tex2D(_OverlayTex, i.uv * _OverlayTex_ST.xy + _OverlayTex_ST.zw + _OverlayFlowSpeed.xy * _Time.y + uvOff) * _OverlayColor;
                float dAmt = _DissolveAmount;
                #ifdef _USEPARTICLEALPHADISSOLVE_ON
                    dAmt = saturate(_DissolveAmount + (1.0 - saturate(i.color.a / max(0.001, _VertexAlphaRef))));
                #endif
                float dVal = tex2D(_DissolveTex, i.uv * _DissolveTex_ST.xy + _DissolveTex_ST.zw).r;
                float dMask = step(dAmt, dVal) * tex.a;
                float eMask = saturate(step(dAmt - _DissolveEdgeWidth, dVal) - step(dAmt, dVal)) * tex.a * saturate(dAmt * 100.0);
                float3 fresnelRGB = 0; float fAlphaMul = 1.0;
                #ifdef _FRESNEL_ON
                    float fPower = max(0.1, 15.1 - _FresnelWidth);
                    float fNormal = pow(1.0 - saturate(abs(dot(normalize(i.normalWS), normalize(i.viewDirWS)))), fPower);
                    float2 uvD = min(i.uv, 1.0 - i.uv);
                    float fEff = lerp(fNormal, pow(saturate(1.0 - min(uvD.x, uvD.y) * 2.0), fPower), step(0.5, _FresnelType));
                    #ifdef _FRESNEL_MASK_ON
                        fAlphaMul = fEff;
                    #endif
                    fresnelRGB = _FresnelColor.rgb * fEff * _FresnelIntensity;
                #endif
                float3 baseRGB = tex.rgb * _TintColor.rgb * i.color.rgb * over.rgb * _Brightness * fAlphaMul;
                float alpha = tex.a * _TintColor.a * over.a * fAlphaMul * softFade;
                float3 finalRGB = ((baseRGB + fresnelRGB) * dMask) + (_DissolveEdgeColor.rgb * eMask);
                float finalAlpha = saturate((alpha * dMask) + eMask);
                #ifndef _USEPARTICLEALPHADISSOLVE_ON
                    finalAlpha *= i.color.a;
                #endif
                return float4(finalRGB, finalAlpha);
            }
            ENDCG
        }
    }
}