调整透明度Shader

可以扩展给其他shader添加透明度

Shader "91YGame/AlphaTransparency" {    Properties {        _MainTex ("Base (RGB)", 2D) = "white" {}        _TransVal("Transparency Value",Range(0.01,1))=0.5    }    SubShader {        Tags { "RenderType"="Opaque" }        LOD 200                //alpha参数;        CGPROGRAM        #pragma surface surf Lambert alpha        sampler2D _MainTex;        float _TransVal;        struct Input {            float2 uv_MainTex;        };        void surf (Input IN, inout SurfaceOutput o) {            half4 c = tex2D (_MainTex, IN.uv_MainTex);            o.Albedo = c.rgb;            o.Alpha =c.r*_TransVal;//c.g || c.b        }        ENDCG    }     FallBack "Diffuse"}