Shader "Unlit/unlit"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
		SubShader
	{
		Tags { "RenderType"="Transparent" }
		LOD 100
		Blend SrcAlpha OneMinusSrcAlpha


		Pass
		{
			CGPROGRAM

			#pragma vertex vert
			#pragma fragment frag alpha
			// make fog work
			#pragma multi_compile_fog
			#pragma enable_d3d11_debug_symbols

			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				float4 worldPos : TEXCOORD1;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};

			struct q {
				float4 c;
			};

			sampler2D _MainTex;
			float4 _MainTex_ST;

			v2f vert (appdata v)
			{
				v2f o;
				o.worldPos = mul(unity_ObjectToWorld, v.vertex);
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}

			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv);
				col.a = 0.0;
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);

				if (i.worldPos.y > 1.0) {
					col.a = 1.0;
				}
				else {
					col.a = i.worldPos.y;
				}


				return col;
			}
			ENDCG
		}
	}
}