Unity Shader （五）Surface Shader示例

1、替换颜色

Shader "Custom/Example_Frag_5" {

    Properties {

        _MainTex ("Albedo (RGB)", 2D) = "white" {}

        _MainColor("MainColor",color)=(,,,)

        _SecondColor("SecondColor",color)=(,,,)

        _Center("Center",range(-2.7,2.7))=

        _R("R",range(,0.5))=0.2 //颜色渐变的半径

        _Glossiness ("Smoothness", Range(,)) = 0.5

        _Metallic ("Metallic", Range(,)) = 0.0

    }

    SubShader {

        Tags { "RenderType"="Opaque" }

        LOD

        CGPROGRAM

        #pragma surface surf Standard vertex:vert fullforwardshadows

        #pragma target 3.0

        sampler2D _MainTex;

        half _Glossiness;

        half _Metallic;

        float4 _MainColor;

        float4 _SecondColor;

        float _R;

        float _Center;

        struct Input {

            float2 uv_MainTex;

            float x;

        };

        void vert(inout appdata_full v,out Input o)

        {

            o.uv_MainTex=v.texcoord.xy;

            o.x=v.vertex.x;

        }

        void surf (Input IN, inout SurfaceOutputStandard o) {

            fixed4 c = tex2D (_MainTex, IN.uv_MainTex);

            o.Albedo = c.rgb;

            o.Metallic = _Metallic;

            o.Smoothness = _Glossiness;

            o.Alpha = c.a;

            float d=IN.x-_Center;

            float s=abs(d);

            d=d/s;

            float f=s/_R;

            f=saturate(f);

            d*=f;

            d=d/+0.5;

            o.Albedo*=lerp(_MainColor,_SecondColor,d)*;

        }

        ENDCG

    }

    FallBack "Diffuse"

}