透明度调整Shader

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Shader "Hsj/AlphaSetting" {
  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"
}