Shader "BeatSaber/Unlit Glow Cutout Dithered"
{
	Properties
	{
		_Color ("Color", Color) = (1,1,1,1)
		_Tex ("Texture", 2D) = "white" {}
		_Bloom ("Glow", Range (0, 1)) = 0
		_DitherMaskScale("Dither Mask Scale", Float) = 40
		_DitherMask("Dither Mask", 2D) = "white" {}
		_Alpha("Alpha", Float) = 1
		_Cutout ("Cutout", Range (0, 1)) = 0.5
	}
	SubShader
	{
		Tags { "RenderType"="Opaque"}
		LOD 100
		Cull Off

		Pass
		{
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				fixed4 color : COLOR;
				float2 uv : TEXCOORD0;
				UNITY_VERTEX_INPUT_INSTANCE_ID
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				float4 scrPos : TEXCOORD1;
				float4 vertex : SV_POSITION;
				half4 color : COLOR;
			};

			float4 _Color;
			float _Bloom;
			sampler2D _DitherMask;
			float _DitherMaskScale;
			float _Alpha;
			float _Cutout;

			sampler2D _Tex;
			float4 _Tex_ST;
			
			v2f vert (appdata_full v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv = v.texcoord;
				o.color = v.color;
				o.scrPos = ComputeScreenPos(v.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 col = _Color * tex2D(_Tex, TRANSFORM_TEX(i.uv, _Tex));

				if (col.a < _Cutout) discard;

				float4 ase_screenPos = float4( i.scrPos.xyz , i.scrPos.w + 0.00000000001 );
				float4 ase_screenPosNorm = ase_screenPos / ase_screenPos.w;

				if (tex2D(_DitherMask, ase_screenPosNorm.xy* _ScreenParams.xy * _DitherMaskScale).r >= _Alpha * i.color.a) discard;

				col *= float4(i.color.rgb,0.0);
				col.a = _Bloom;

				return col;
			}
			ENDCG
		}
	}
}