自言自语

最近一直工作比较忙，但也没有放弃shader学习，今天又从同事那里GET到了一个效果，比较简单，但是效果还不错。性价比应该还不错。笔记下来，以后可以拿来用用。不过自己计算的改动就是没啥道理。所以要论证理论正确性可能是没有的。不过我是美术，好看就完事儿了。

一、效果

二、Shader(Builltin)

Shader "TNShaderPractise/GlassBottle"
{Properties{_MainTex ("Texture", 2D) = "black" {}_MainTex2 ("Texture2", 2D) = "black" {}_MaskTex ("_MaskTex", 2D) = "black" {}_MatCap01Pow("_MatCap01Pow",Float)=1_refract("_refract",Float) =1[HDR]_refacColor("_refacColor",Color)=(0,0,0,1)}SubShader{Tags { "RenderType"="Transparent"  "Queue" = "Transparent"}Pass{Blend SrcAlpha OneMinusSrcAlphaCull OffZWrite OffCGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct a2v{float4 vertex : POSITION;half3 normal : NORMAL;float2 texcoord : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;half3 normalWS : TEXCOORD1;     float4 pos : SV_POSITION;float4 posWS : TEXCOORD2;float4 vPOS : TEXCOORD3;};sampler2D _MainTex;float4 _MainTex_ST;     sampler2D _MainTex2;float4 _MainTex2_ST;  sampler2D _MaskTex;float4 _MaskTex_ST;float _MatCap01Pow;float _refract;float4 _refacColor;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.posWS = mul(unity_ObjectToWorld,v.vertex);o.normalWS = UnityObjectToWorldNormal(v.normal);o.uv = v.texcoord;o.vPOS = o.posWS - v.vertex;return o;}fixed4 frag (v2f i) : SV_Target{half3 viewDir = normalize(UnityWorldSpaceViewDir(i.posWS));half3 normalVS = normalize(mul(UNITY_MATRIX_V,i.normalWS));//改进版matCapUVfloat3 posVS = normalize(mul(UNITY_MATRIX_V,i.posWS));normalVS = cross(posVS,normalVS);normalVS.y = - normalVS.y;half thickMask = tex2D (_MaskTex,i.uv).g;half NdotV = abs(dot(i.normalWS,viewDir));half fresnel = smoothstep(1,0,NdotV);fresnel = fresnel+thickMask;float uvOffset = fresnel*_refract;float2 matCapUV = normalVS.yx*0.5+0.5;float2 matCapUV2 = uvOffset+matCapUV;half4 matCap01 = tex2D(_MainTex,matCapUV)*_MatCap01Pow;half4 matCap02 = tex2D(_MainTex2,matCapUV2);matCap02 = lerp (_refacColor*0.5,_refacColor*matCap02,clamp(0,1,uvOffset));float alpha = saturate(max(matCap01.r,fresnel*fresnel));half4 col = matCap01+ matCap02;return float4(col.rgb,alpha);}ENDCG}}FallBack "Diffuse"
}

三、修改版来了

效果

Shader

Shader "TNShaderPractise/GlassBottle"
{Properties{_MainTex ("Texture", 2D) = "black" {}_MainTex2 ("Texture2", 2D) = "black" {}_MaskTex ("_MaskTex", 2D) = "black" {}_MatCap01Pow("_MatCap01Pow",Float)=1_refract("_refract",Float) =1[HDR]_refacColor("_refacColor",Color)=(0,0,0,1)_DecalTex ("DecalTex",2D) = "black"{} [HDR]_DecalColor("DecalColor",Color)=(1,1,1,1)}SubShader{Tags { "RenderType"="Transparent"  "Queue" = "Transparent"}Pass{Blend SrcAlpha OneMinusSrcAlphaCull FrontZWrite OffCGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct a2v{float4 vertex : POSITION;half3 normal : NORMAL;float2 texcoord : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;half3 normalWS : TEXCOORD1;       float4 pos : SV_POSITION;float4 posWS : TEXCOORD2;float4 vPOS : TEXCOORD3;};sampler2D _MainTex;float4 _MainTex_ST;     sampler2D _MainTex2;float4 _MainTex2_ST;  sampler2D _MaskTex;float4 _MaskTex_ST;    sampler2D _DecalTex;float4 _DecalTex_ST;float4 _DecalColor;float _MatCap01Pow;float _refract;float4 _refacColor;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.posWS = mul(unity_ObjectToWorld,v.vertex);o.normalWS = UnityObjectToWorldNormal(v.normal);o.uv = v.texcoord;o.vPOS = o.posWS - v.vertex;return o;}fixed4 frag (v2f i) : SV_Target{half3 viewDir = normalize(UnityWorldSpaceViewDir(i.posWS));half3 normalVS = normalize(mul(UNITY_MATRIX_V,i.normalWS));//改进版matCapUVfloat3 posVS = normalize(mul(UNITY_MATRIX_V,i.posWS));normalVS = cross(posVS,normalVS);normalVS.y = - normalVS.y;half thickMask = tex2D (_MaskTex,i.uv*_MaskTex_ST.xy+_MaskTex_ST.zw).g;half NdotV = abs(dot(i.normalWS,viewDir));half fresnel = smoothstep(1,0,NdotV);fresnel = fresnel+thickMask;float uvOffset = fresnel*_refract;float2 matCapUV = normalVS.yx*0.5+0.5;float2 matCapUV2 = uvOffset+matCapUV;half4 matCap01 = tex2D(_MainTex,matCapUV)*_MatCap01Pow;half4 matCap02 = tex2D(_MainTex2,matCapUV2);half4 Decal = tex2D(_DecalTex,i.uv*_DecalTex_ST.xy+_DecalTex_ST.zw)*_DecalColor;matCap02 = lerp (_refacColor*0.5,_refacColor*matCap02,clamp(0,1,uvOffset));float alpha = saturate(max(matCap01.r,fresnel*fresnel));float alphaDecal = smoothstep(0,0.1,Decal.r);half4 col = matCap01+ matCap02;col = lerp(col,Decal,alphaDecal);float finalAlpha =  lerp(alpha,alphaDecal,alphaDecal);return float4(col.rgb,finalAlpha);}ENDCG}Pass{Blend SrcAlpha OneMinusSrcAlphaCull BackZWrite OffCGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct a2v{float4 vertex : POSITION;half3 normal : NORMAL;float2 texcoord : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;half3 normalWS : TEXCOORD1;        float4 pos : SV_POSITION;float4 posWS : TEXCOORD2;float4 vPOS : TEXCOORD3;};sampler2D _MainTex;float4 _MainTex_ST;     sampler2D _MainTex2;float4 _MainTex2_ST;  sampler2D _MaskTex;float4 _MaskTex_ST;    sampler2D _DecalTex;float4 _DecalTex_ST;float4 _DecalColor;float _MatCap01Pow;float _refract;float4 _refacColor;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.posWS = mul(unity_ObjectToWorld,v.vertex);o.normalWS = UnityObjectToWorldNormal(v.normal);o.uv = v.texcoord;o.vPOS = o.posWS - v.vertex;return o;}fixed4 frag (v2f i) : SV_Target{half3 viewDir = normalize(UnityWorldSpaceViewDir(i.posWS));half3 normalVS = normalize(mul(UNITY_MATRIX_V,i.normalWS));//改进版matCapUVfloat3 posVS = normalize(mul(UNITY_MATRIX_V,i.posWS));normalVS = cross(posVS,normalVS);normalVS.y = - normalVS.y;half thickMask = tex2D (_MaskTex,i.uv*_MaskTex_ST.xy+_MaskTex_ST.zw).g;half NdotV = abs(dot(i.normalWS,viewDir));half fresnel = smoothstep(1,0,NdotV);fresnel = fresnel+thickMask;float uvOffset = fresnel*_refract;float2 matCapUV = normalVS.yx*0.5+0.5;float2 matCapUV2 = uvOffset+matCapUV;half4 matCap01 = tex2D(_MainTex,matCapUV)*_MatCap01Pow;half4 matCap02 = tex2D(_MainTex2,matCapUV2);half4 Decal = tex2D(_DecalTex,i.uv*_DecalTex_ST.xy+_DecalTex_ST.zw)*_DecalColor;//志诚大佬纠正我透明度取值的问题 提出用灰度计算不会影响后边的颜色计算half DecalAlpha = Decal.r*0.2125+Decal.g*0.7154+Decal.b*0.0721;matCap02 = lerp (_refacColor*0.5,_refacColor*matCap02,clamp(0,1,uvOffset));float alpha = max(matCap01.r,fresnel*fresnel);float alphaDecal = smoothstep(0,0.08,DecalAlpha);half4 col = matCap01+ matCap02;col = lerp(col,Decal,alphaDecal);float finalAlpha =  lerp(alpha,alphaDecal,alphaDecal);return float4(col.rgb,finalAlpha);}ENDCG}}FallBack "Diffuse"
}

总结

继续加油

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简单的玻璃材质效果——UnityShader学习笔记

文章目录

自言自语

一、效果

二、Shader(Builltin)

三、修改版来了

效果

Shader

总结

简单的玻璃材质效果——UnityShader学习笔记相关推荐

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