Shader "Myshader/Disappear"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _Offset("Offset",Range(0,1)) = 1
        [Toggle(IsVertical)]_IsVertical("_IsVertical",float) = 1
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "RenderType" = "Opaque" "IgnoreProjectot"="true" }
        

        Pass
        {
            ZWrite Off
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            struct a2v
            {
                float4 vertex : POSITION;
                float4 uv : TEXCOORD0;
            };

            struct v2f
            {
                float4 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            fixed _Offset;
            float _IsVertical;
            v2f vert (a2v v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv.xy = TRANSFORM_TEX(v.uv, _MainTex);
                if(_IsVertical==1){
                    o.uv.z =_Offset - o.uv.y;
                }else{
                    o.uv.z = _Offset - o.uv.x;  
                }
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                clip(i.uv.z);
                fixed4 col = tex2D(_MainTex, i.uv.xy);
                return col;
            }
            ENDCG
        }
    }
}