类崩坏三 眼睛渲染分析
大致想法
折射效果 + 反射效果 + 扰动效果 + 菲涅尔反射
折射效果 反射效果
参考了冯乐乐的《Unity Shader》入门精要的写法
折射效果Shader代码
Shader "Refraction" {
Properties {
_Color ("Color Tint", Color) = (1, 1, 1, 1)
_RefractColor ("Refraction Color", Color) = (1, 1, 1, 1)
_RefractAmount ("Refraction Amount", Range(0, 1)) = 1
_RefractRatio ("Refraction Ratio", Range(0.1, 1)) = 0.5
_Cubemap ("Refraction Cubemap", Cube) = "_Skybox" {}
}
SubShader {
Tags { "RenderType"="Opaque" "Queue"="Geometry"}
Pass {
Tags { "LightMode"="ForwardBase" }
CGPROGRAM
#pragma multi_compile_fwdbase
#pragma vertex vert
#pragma fragment frag
#include "Lighting.cginc"
#include "AutoLight.cginc"
fixed4 _Color;
fixed4 _RefractColor;
float _RefractAmount;
fixed _RefractRatio;
samplerCUBE _Cubemap;
struct a2v {
float4 vertex : POSITION;
float3 normal : NORMAL;
};
struct v2f {
float4 pos : SV_POSITION;
float3 worldPos : TEXCOORD0;
fixed3 worldNormal : TEXCOORD1;
fixed3 worldViewDir : TEXCOORD2;
fixed3 worldRefr : TEXCOORD3;
SHADOW_COORDS(4)
};
v2f vert(a2v v) {
v2f o;
o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
o.worldNormal = UnityObjectToWorldNormal(v.normal);
o.worldPos = mul(_Object2World, v.vertex).xyz;
o.worldViewDir = UnityWorldSpaceViewDir(o.worldPos);
// Compute the refract dir in world space
o.worldRefr = refract(-normalize(o.worldViewDir), normalize(o.worldNormal), _RefractRatio);
TRANSFER_SHADOW(o);
return o;
}
fixed4 frag(v2f i) : SV_Target {
fixed3 worldNormal = normalize(i.worldNormal);
fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.worldPos));
fixed3 worldViewDir = normalize(i.worldViewDir);
fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz;
fixed3 diffuse = _LightColor0.rgb * _Color.rgb * max(0, dot(worldNormal, worldLightDir));
// Use the refract dir in world space to access the cubemap
fixed3 refraction = texCUBE(_Cubemap, i.worldRefr).rgb * _RefractColor.rgb;
UNITY_LIGHT_ATTENUATION(atten, i, i.worldPos);
// Mix the diffuse color with the refract color
fixed3 color = ambient + lerp(diffuse, refraction, _RefractAmount) * atten;
return fixed4(color, 1.0);
}
ENDCG
}
}
FallBack "Diffuse"
}
反射效果Shader代码
Shader "Reflection" {
Properties {
_Color ("Color Tint", Color) = (1, 1, 1, 1)
_ReflectColor ("Reflection Color", Color) = (1, 1, 1, 1)
_ReflectAmount ("Reflect Amount", Range(0, 1)) = 1
_Cubemap ("Reflection Cubemap", Cube) = "_Skybox" {}
}
SubShader {
Tags { "RenderType"="Opaque" "Queue"="Geometry"}
Pass {
Tags { "LightMode"="ForwardBase" }
CGPROGRAM
#pragma multi_compile_fwdbase
#pragma vertex vert
#pragma fragment frag
#include "Lighting.cginc"
#include "AutoLight.cginc"
fixed4 _Color;
fixed4 _ReflectColor;
fixed _ReflectAmount;
samplerCUBE _Cubemap;
struct a2v {
float4 vertex : POSITION;
float3 normal : NORMAL;
};
struct v2f {
float4 pos : SV_POSITION;
float3 worldPos : TEXCOORD0;
fixed3 worldNormal : TEXCOORD1;
fixed3 worldViewDir : TEXCOORD2;
fixed3 worldRefl : TEXCOORD3;
SHADOW_COORDS(4)
};
v2f vert(a2v v) {
v2f o;
o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
o.worldNormal = UnityObjectToWorldNormal(v.normal);
o.worldPos = mul(_Object2World, v.vertex).xyz;
o.worldViewDir = UnityWorldSpaceViewDir(o.worldPos);
// Compute the reflect dir in world space
o.worldRefl = reflect(-o.worldViewDir, o.worldNormal);
TRANSFER_SHADOW(o);
return o;
}
fixed4 frag(v2f i) : SV_Target {
fixed3 worldNormal = normalize(i.worldNormal);
fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.worldPos));
fixed3 worldViewDir = normalize(i.worldViewDir);
fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz;
fixed3 diffuse = _LightColor0.rgb * _Color.rgb * max(0, dot(worldNormal, worldLightDir));
// Use the reflect dir in world space to access the cubemap
fixed3 reflection = texCUBE(_Cubemap, i.worldRefl).rgb * _ReflectColor.rgb;
UNITY_LIGHT_ATTENUATION(atten, i, i.worldPos);
// Mix the diffuse color with the reflected color
fixed3 color = ambient + lerp(diffuse, reflection, _ReflectAmount) * atten;
return fixed4(color, 1.0);
}
ENDCG
}
}
FallBack "Diffuse"
}
扰动效果
加上扰动效果后，眼睛上会出现周期性的波动，像是水面一样，很是好看。
Pass {
Name "FORWARD_DELTA"
Tags {
"LightMode"="ForwardAdd"
}
Blend One One
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#define UNITY_PASS_FORWARDADD
#include "UnityCG.cginc"
#include "AutoLight.cginc"
#pragma multi_compile_fwdadd_fullshadows
#pragma multi_compile_fog
#pragma only_renderers d3d9 d3d11 glcore gles
#pragma target 3.0
uniform float4 _LightColor0;
uniform float _speed;
uniform sampler2D _MeltTex; uniform float4 _MeltTex_ST;
uniform float _Intensity;
uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
struct VertexInput {
float4 vertex : POSITION;
float3 normal : NORMAL;
float2 texcoord0 : TEXCOORD0;
};
struct VertexOutput {
float4 pos : SV_POSITION;
float2 uv0 : TEXCOORD0;
float4 posWorld : TEXCOORD1;
float3 normalDir : TEXCOORD2;
LIGHTING_COORDS(3,4)
UNITY_FOG_COORDS(5)
};
VertexOutput vert (VertexInput v) {
VertexOutput o = (VertexOutput)0;
o.uv0 = v.texcoord0;
o.normalDir = UnityObjectToWorldNormal(v.normal);
o.posWorld = mul(unity_ObjectToWorld, v.vertex);
float3 lightColor = _LightColor0.rgb;
o.pos = UnityObjectToClipPos( v.vertex );
UNITY_TRANSFER_FOG(o,o.pos);
TRANSFER_VERTEX_TO_FRAGMENT(o)
return o;
}
float4 frag(VertexOutput i) : COLOR {
i.normalDir = normalize(i.normalDir);
float3 normalDirection = i.normalDir;
float4 time = _Time;
float2 Tex = (i.uv0+(_speed*time.g)*float2(0.1,0.1));
float4 _MeltTex_var = tex2D(_MeltTex,TRANSFORM_TEX(Tex, _MeltTex));
float2 Tex2 = lerp(i.uv0,(float3(i.uv0,0.0)*_MeltTex_var.rgb*2.0).rg,_Intensity);
float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(Tex2, _MainTex));
clip(_MainTex_var.a - 0.5);
float3 lightDirection = normalize(lerp(_WorldSpaceLightPos0.xyz, _WorldSpaceLightPos0.xyz - i.posWorld.xyz,_WorldSpaceLightPos0.w));
float3 lightColor = _LightColor0.rgb;
float attenuation = LIGHT_ATTENUATION(i);
float3 attenColor = attenuation * _LightColor0.xyz;
float NdotL = max(0.0,dot( normalDirection, lightDirection ));
float3 directDiffuse = max( 0.0, NdotL) * attenColor;
float3 diffuseColor = _MainTex_var.rgb;
float3 diffuse = directDiffuse * diffuseColor;
float3 finalColor = diffuse;
fixed4 finalRGBA = fixed4(finalColor * 1,0);
UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
return finalRGBA;
}
ENDCG
}
效果截图
截图一
截图二
完整代码
Shader "ShaderEye" {
Properties {
_speed ("speed", Range(0, 5)) = 0.4
_MeltTex ("MeltTex", 2D) = "black" {}
_Intensity ("Intensity", Range(0, 1)) = 0.3601617
_MainTex ("MainTex", 2D) = "white" {}
[HideInInspector]_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
_Color ("Color Tint", Color) = (1, 1, 1, 1)
_ReflectColor ("Reflection Color", Color) = (1, 1, 1, 1)
_ReflectAmount ("Reflect Amount", Range(0, 1)) = 1
_Cubemap ("Reflection Cubemap", Cube) = "_Skybox" {}
//rgb to hsv
_HueOffset("Hue Offset", Range(0,1)) = 0
_SaturationOffset("Hue Offset", Range(-1,1)) = 0.3
_ValueOffset("Hue Offset", Range(-1,1)) = 0.15
_FresnelScale("FresnelScale",Range(0.1,10)) = 1
[HDR]_FresnelColor("FresnelColor",color) = (1,1,1,1)
}
SubShader {
Tags {
"Queue"="AlphaTest"
"RenderType"="TransparentCutout"
}
Pass {
Name "FORWARD"
Tags {
"LightMode"="ForwardBase"
}
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#define UNITY_PASS_FORWARDBASE
#include "UnityCG.cginc"
#include "AutoLight.cginc"
#pragma multi_compile_fwdbase_fullshadows
#pragma multi_compile_fog
#pragma only_renderers d3d9 d3d11 glcore gles
#pragma target 3.0
uniform float4 _LightColor0;
uniform float _speed;
uniform sampler2D _MeltTex; uniform float4 _MeltTex_ST;
uniform float _Intensity;
uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
fixed4 _Color;
fixed4 _ReflectColor;
fixed _ReflectAmount;
samplerCUBE _Cubemap;
float _FresnelScale;
fixed4 _FresnelColor;
float _HueOffset;
float _SaturationOffset;
float _ValueOffset;
struct VertexInput {
float4 vertex : POSITION;
float3 normal : NORMAL;
float2 texcoord0 : TEXCOORD0;
float2 uv : TEXCOORD1;
};
struct VertexOutput {
float4 pos : SV_POSITION;
float2 uv0 : TEXCOORD0;
float4 posWorld : TEXCOORD1;
float3 normalDir : TEXCOORD2;
fixed3 worldViewDir : TEXCOORD3;
fixed3 worldRefl : TEXCOORD4;
float2 uvFoam : TEXCOORD5;
SHADOW_COORDS(4)
LIGHTING_COORDS(3,4)
UNITY_FOG_COORDS(5)
};
VertexOutput vert (VertexInput v) {
VertexOutput o = (VertexOutput)0;
o.uv0 = v.texcoord0;
o.normalDir = UnityObjectToWorldNormal(v.normal);
o.posWorld = mul(unity_ObjectToWorld, v.vertex);
o.worldViewDir = UnityWorldSpaceViewDir(o.posWorld);
o.worldRefl = reflect(-o.worldViewDir, o.normalDir);
o.uvFoam = TRANSFORM_TEX(v.uv,_MainTex);
TRANSFER_SHADOW(o);
float3 lightColor = _LightColor0.rgb;
o.pos = UnityObjectToClipPos( v.vertex );
UNITY_TRANSFER_FOG(o,o.pos);
TRANSFER_VERTEX_TO_FRAGMENT(o)
return o;
}
float4 frag(VertexOutput i) : COLOR {
i.normalDir = normalize(i.normalDir);
fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(i.posWorld));
fixed3 worldViewDir = normalize(i.worldViewDir);
float3 normalDirection = i.normalDir;
float4 time = _Time;
float2 Tex = (i.uv0+(_speed*time.g)*float2(0.1,0.1));
float4 _MeltTex_var = tex2D(_MeltTex,TRANSFORM_TEX(Tex, _MeltTex));
float2 Tex2 = lerp(i.uv0,(float3(i.uv0,0.0)*_MeltTex_var.rgb*2.0).rg,_Intensity);
float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(Tex2, _MainTex));
clip(_MainTex_var.a - 0.5);
float3 lightDirection = normalize(_WorldSpaceLightPos0.xyz);
float3 lightColor = _LightColor0.rgb;
float attenuation = LIGHT_ATTENUATION(i);
float3 attenColor = attenuation * _LightColor0.xyz;
float NdotL = max(0.0,dot( normalDirection, lightDirection ));
float3 directDiffuse = max( 0.0, NdotL) * attenColor;
float3 indirectDiffuse = float3(0,0,0);
indirectDiffuse += UNITY_LIGHTMODEL_AMBIENT.rgb; // Ambient Light
float3 diffuseColor = _MainTex_var.rgb;
float3 diffuse = (directDiffuse + indirectDiffuse) * diffuseColor;
float3 finalColor = diffuse;
fixed4 finalRGBA = fixed4(finalColor,1);
UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz;
fixed3 _diffuse = _LightColor0.rgb * _Color.rgb * max(0, dot(normalDirection, worldLightDir));
fixed3 reflection = texCUBE(_Cubemap, i.worldRefl).rgb * _ReflectColor.rgb;
UNITY_LIGHT_ATTENUATION(atten, i, i.posWorld);
fixed3 Fresnel = pow(1.0 - max(0,dot(worldLightDir, worldViewDir)),_FresnelScale)*_FresnelColor.rgb;
fixed4 finalFresnel = fixed4(Fresnel,1);
// Mix the diffuse color with the reflected color
fixed3 color = ambient + lerp(_diffuse, reflection, _ReflectAmount) * atten;
fixed4 col = fixed4(reflection, 1.0) + finalRGBA + _MainTex_var;
float3 rgb = col.rgb;
float4 k = float4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
float4 p = lerp(float4(rgb.bg, k.wz), float4(rgb.gb, k.xy), step(rgb.b, rgb.g));
// 比较r和max(b,g)
float4 q = lerp(float4(p.xyw, rgb.r), float4(rgb.r, p.yzx), step(p.x, rgb.r));
float d = q.x - min(q.w, q.y);
float e = 1.0e-10;
float3 hsv = float3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
hsv.x = hsv.x + _HueOffset;
hsv.y = hsv.y + _SaturationOffset;
hsv.z = hsv.z + _ValueOffset;
rgb = saturate(3.0*abs(1.0-2.0*frac(hsv.x+float3(0.0,-1.0/3.0,1.0/3.0)))-1); //明度和饱和度为1时的颜色
rgb = (lerp(float3(1,1,1),rgb,hsv.y)*hsv.z); // hsv
col.rgb = rgb;
col.a = 1;
return col + finalFresnel;
}
ENDCG
}
Pass {
Name "FORWARD_DELTA"
Tags {
"LightMode"="ForwardAdd"
}
Blend One One
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#define UNITY_PASS_FORWARDADD
#include "UnityCG.cginc"
#include "AutoLight.cginc"
#pragma multi_compile_fwdadd_fullshadows
#pragma multi_compile_fog
#pragma only_renderers d3d9 d3d11 glcore gles
#pragma target 3.0
uniform float4 _LightColor0;
uniform float _speed;
uniform sampler2D _MeltTex; uniform float4 _MeltTex_ST;
uniform float _Intensity;
uniform sampler2D _MainTex; uniform float4 _MainTex_ST;
struct VertexInput {
float4 vertex : POSITION;
float3 normal : NORMAL;
float2 texcoord0 : TEXCOORD0;
};
struct VertexOutput {
float4 pos : SV_POSITION;
float2 uv0 : TEXCOORD0;
float4 posWorld : TEXCOORD1;
float3 normalDir : TEXCOORD2;
LIGHTING_COORDS(3,4)
UNITY_FOG_COORDS(5)
};
VertexOutput vert (VertexInput v) {
VertexOutput o = (VertexOutput)0;
o.uv0 = v.texcoord0;
o.normalDir = UnityObjectToWorldNormal(v.normal);
o.posWorld = mul(unity_ObjectToWorld, v.vertex);
float3 lightColor = _LightColor0.rgb;
o.pos = UnityObjectToClipPos( v.vertex );
UNITY_TRANSFER_FOG(o,o.pos);
TRANSFER_VERTEX_TO_FRAGMENT(o)
return o;
}
float4 frag(VertexOutput i) : COLOR {
i.normalDir = normalize(i.normalDir);
float3 normalDirection = i.normalDir;
float4 time = _Time;
float2 Tex = (i.uv0+(_speed*time.g)*float2(0.1,0.1));
float4 _MeltTex_var = tex2D(_MeltTex,TRANSFORM_TEX(Tex, _MeltTex));
float2 Tex2 = lerp(i.uv0,(float3(i.uv0,0.0)*_MeltTex_var.rgb*2.0).rg,_Intensity);
float4 _MainTex_var = tex2D(_MainTex,TRANSFORM_TEX(Tex2, _MainTex));
clip(_MainTex_var.a - 0.5);
float3 lightDirection = normalize(lerp(_WorldSpaceLightPos0.xyz, _WorldSpaceLightPos0.xyz - i.posWorld.xyz,_WorldSpaceLightPos0.w));
float3 lightColor = _LightColor0.rgb;
float attenuation = LIGHT_ATTENUATION(i);
float3 attenColor = attenuation * _LightColor0.xyz;
float NdotL = max(0.0,dot( normalDirection, lightDirection ));
float3 directDiffuse = max( 0.0, NdotL) * attenColor;
float3 diffuseColor = _MainTex_var.rgb;
float3 diffuse = directDiffuse * diffuseColor;
float3 finalColor = diffuse;
fixed4 finalRGBA = fixed4(finalColor * 1,0);
UNITY_APPLY_FOG(i.fogCoord, finalRGBA);
return finalRGBA;
}
ENDCG
}
}
FallBack "Diffuse"
}
}
原创文章 24
获赞 26
访问量 7840