// Unlit alpha-cutout shader.
// - no lighting
// - no lightmap support

Shader "MTE/Grass/UnlitAlphaCutout"
{
	Properties
	{
		_MainTex("Grass Texture", 2D) = "white" {}
		_Cutoff("Alpha cutoff", Range(0,1)) = 0.5
	}

	SubShader
	{
		Tags
		{
			"Queue" = "AlphaTest"
			"IgnoreProjector" = "True"
			"RenderType" = "TransparentCutout"
		}

		LOD 100
		CULL OFF//no back face culling
		Lighting Off

		Pass {
			CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#pragma target 2.0
				#pragma multi_compile_fog

				#include "UnityCG.cginc"

				struct appdata_t {
					float4 vertex : POSITION;
					float2 texcoord : TEXCOORD0;
				};

				struct v2f {
					float4 vertex : SV_POSITION;
					float2 texcoord : TEXCOORD0;
					UNITY_FOG_COORDS(1)
				};

				sampler2D _MainTex;
				float4 _MainTex_ST;
				fixed _Cutoff;

				v2f vert (appdata_t v)
				{
					v2f o;
					o.vertex = UnityObjectToClipPos(v.vertex);
					o.texcoord = TRANSFORM_TEX(v.texcoord, _MainTex);
					UNITY_TRANSFER_FOG(o,o.vertex);
					return o;
				}

				fixed4 frag (v2f i) : SV_Target
				{
					fixed4 col = tex2D(_MainTex, i.texcoord);
					clip(col.a - _Cutoff);
					UNITY_APPLY_FOG(i.fogCoord, col);
					return col;
				}
			ENDCG
		}
	}
}