Unityshader - materialcapture material capture effect (Emerald axe)

Statement ： This article is a personal note , For study and research, use non-commercial , The content is obtained from personal research and comprehensive arrangement , If there is a violation , Please contact the , Violations must be corrected .

---

UnityShader Study Directory

---

---

Preface

Unity2019.3.6
AmplifyShaderEditor

---

One 、 Realization principle

The map follows the camera

Two 、 Effect and source code display

1. Photosphere effect

Effect description :
Through camera space , Put the map uv Follow the camera .
The renderings are as follows :

AmplifyShaderEditor The node diagram is as follows :

2. Emerald axe effect

Effect description
A gradient map is superimposed on effect one , Superimposed again matcap Mapping
The renderings are as follows :
AmplifyShaderEditor The node diagram is as follows :

The parameter setting is shown in the figure below :

The code is as follows ：

Shader "Unlit/MatCap_Code"
{
    
    Properties
    {
    
        _MainTex ("Texture", 2D) = "white" {
    }
        _MatcapTex("MatcapTex",2D)="white"{
    }// Gradient maps 
        _RampTex("RampTex",2D)="white"{
    }
        _MatcapAddTex("MatcapAddTex",2D)="white"{
    }
        _MatcapIntensity("Matcap Intensity",Float) = 1.0
        _MatcapAddIntensity("MatcapAdd Intensity",Float)=1.0
    }
    SubShader
    {
    
        Tags {
     "RenderType"="Opaque" }
        LOD 100

        Pass
        {
    
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            struct appdata// model data 
            {
    
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
                float3 normal:NORMAL;
            };

            struct v2f// Custom data   The output of the vertex , Slice input 
            {
    
                float4 vertex : SV_POSITION;
                float2 uv : TEXCOORD0;               
                float3 worldNormal : TEXCOORD1;
                float3 worldPos:TEXCOORD2;
            };

            sampler2D _MainTex;
            sampler2D _MatcapTex;
            sampler2D _RampTex;
            sampler2D _MatcapAddTex;
            float4 _MainTex_ST;
            float _MatcapIntensity;
            float _MatcapAddIntensity;


            v2f vert (appdata v)
            {
    
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                float3 worldNormal=mul(float4(v.normal,0.0),unity_WorldToObject);// It can be used for non proportional scaling without error .
                //float3 worldNormal=UnityObjectToWorldNormal(v.normal);// Universal , Most of the time, the uplink code can be replaced 
                o.worldNormal=worldNormal;
                o.worldPos=mul(unity_ObjectToWorld,v.vertex).xyz;
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                        

                half3 worldNormal= i.worldNormal;
                //material capture MainTex
                half3 viewSpaceNormal=mul(UNITY_MATRIX_V,float4(worldNormal,0.0)).xyz; // Normal phasor in camera space 
                half2 matcapUV=(viewSpaceNormal.xy+float2(1.0,1.0))*0.5;
                half4 matcapColor=tex2D(_MatcapTex,matcapUV) *_MatcapIntensity;
                half4 diffuseColor = tex2D(_MainTex, i.uv); 
              
                //fresnel  Gradient mapping 
                //  Calculate the world space view direction 
                half3 worldViewDir=normalize(UnityWorldSpaceViewDir(i.worldPos));
                half ndotv=saturate(dot(i.worldNormal,worldViewDir));
                half fresnel=1.0-ndotv;
                half2 rampUV=half2(fresnel,0.5);
                half4 rampColor=tex2D(_RampTex,rampUV);
                half4 matcapAddColor=tex2D(_MatcapAddTex,matcapUV)*_MatcapAddIntensity;

                half4 combined_color= diffuseColor*matcapColor * rampColor+matcapAddColor;
                

                return combined_color;
            }
            ENDCG
        }
    }
}

post-processing :

Add tone mapping to the camera , Make the color brighter .

Be careful : The corresponding level should also be added to the camera , Otherwise, it will not show

summary

Keep hungry , Stay foolish .

The only thing the world can believe is your efforts and the road you have traveled .