Shader "AR/BeerShader_2"
{

    Properties {
        _MainTex ("Beer Texture", 2D) = "white" {}
    }

    SubShader
    {
        Tags { "Queue"="Geometry-100" }
  
        ZWrite On
        ColorMask 0

        Pass
        {
            
            CGPROGRAM

            #pragma vertex vert
            #pragma fragment frag

            fixed4 _Color;

            struct Input {
                float4 position : POSITION;
                float4 color : COLOR;
                float2 coord : TEXCOORD0;
            };

            struct VertexToFragment {
                float4 position : SV_POSITION;
                float4 color : COLOR;
                half2 coord : TEXCOORD0;
            };
            
            
            VertexToFragment vert(Input IN) {
                VertexToFragment OUT;
                OUT.position = UnityObjectToClipPos( IN.position);
                OUT.color = IN.color;
                OUT.coord = IN.coord;
                return OUT;
            }
                        
            sampler2D _MainTex;
                        
            fixed4 frag(VertexToFragment IN) : SV_Target {
                fixed4 c = tex2D(_MainTex, IN.coord) * IN.color;
                if (c.r == 0) {
                    discard;
                }
                return IN.color;
            }

            ENDCG
        }
    }
}