//Copyright (c) 2021 sunasaji
//Copyright (c) 2019 yukatayu-vrc https://github.com/yukatayu-vrc/HUD_shader/blob/master/LICENSE
//This code is licensed under the MIT License.
Shader "Unlit/LKGCamera45" {
	Properties {
		_MainTex("Texture00", 2D) = "white" {}
		_Tex01 ("Texture01", 2D) = "white" {}
		_Tex02 ("Texture02", 2D) = "white" {}
		_Tex03 ("Texture03", 2D) = "white" {}
		_Tex04 ("Texture04", 2D) = "white" {}
		_Tex05 ("Texture05", 2D) = "white" {}
		_Tex06 ("Texture06", 2D) = "white" {}
		_Tex07 ("Texture07", 2D) = "white" {}
		_Tex08 ("Texture08", 2D) = "white" {}
		_Tex09 ("Texture09", 2D) = "white" {}
		_Tex10 ("Texture10", 2D) = "white" {}
		_Tex11 ("Texture11", 2D) = "white" {}
		_Tex12 ("Texture12", 2D) = "white" {}
		_Tex13 ("Texture13", 2D) = "white" {}
		_Tex14 ("Texture14", 2D) = "white" {}
		_Tex15 ("Texture15", 2D) = "white" {}
		_Tex16 ("Texture16", 2D) = "white" {}
		_Tex17 ("Texture17", 2D) = "white" {}
		_Tex18 ("Texture18", 2D) = "white" {}
		_Tex19 ("Texture19", 2D) = "white" {}
		_Tex20 ("Texture20", 2D) = "white" {}
		_Tex21 ("Texture21", 2D) = "white" {}
		_Tex22 ("Texture22", 2D) = "white" {}
		_Tex23 ("Texture23", 2D) = "white" {}
		_Tex24 ("Texture24", 2D) = "white" {}
		_Tex25 ("Texture25", 2D) = "white" {}
		_Tex26 ("Texture26", 2D) = "white" {}
		_Tex27 ("Texture27", 2D) = "white" {}
		_Tex28 ("Texture28", 2D) = "white" {}
		_Tex29 ("Texture29", 2D) = "white" {}
		_Tex30 ("Texture30", 2D) = "white" {}
		_Tex31 ("Texture31", 2D) = "white" {}
		_Tex32 ("Texture32", 2D) = "white" {}
		_Tex33 ("Texture33", 2D) = "white" {}
		_Tex34 ("Texture34", 2D) = "white" {}
		_Tex35 ("Texture35", 2D) = "white" {}
		_Tex36 ("Texture36", 2D) = "white" {}
		_Tex37 ("Texture37", 2D) = "white" {}
		_Tex38 ("Texture38", 2D) = "white" {}
		_Tex39 ("Texture39", 2D) = "white" {}
		_Tex40 ("Texture40", 2D) = "white" {}
		_Tex41 ("Texture41", 2D) = "white" {}
		_Tex42 ("Texture42", 2D) = "white" {}
		_Tex43 ("Texture43", 2D) = "white" {}
		_Tex44 ("Texture44", 2D) = "white" {}
		_SwitchTex ("Switch", 2D) = "white" {}
		_TileX("Tile X number", int) = 5
		_TileY("Tile Y number", int) = 9
		_TargetScreenX("Target Screen X Resolution", int) = 1920
		_TargetScreenY("Target Screen Y Resolution", int) = 1080
	}

	SubShader {
		Tags { "RenderType"="Transparent" "Queue"="Overlay+4000" "IgnoreProjector"="True" }
		ZTest Always	// 常に前面に表示
		Cull Off    	// 裏面が見えている場合も処理する

		Pass {
			// Meta
			CGPROGRAM
			#pragma target 3.0
			#include "UnityCG.cginc"

			// Struct
			struct appdata {
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
			};
			struct v2f {
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
			};

			// Param
			UNITY_DECLARE_TEX2D(_MainTex);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex01);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex02);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex03);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex04);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex05);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex06);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex07);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex08);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex09);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex10);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex11);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex12);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex13);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex14);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex15);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex16);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex17);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex18);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex19);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex20);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex21);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex22);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex23);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex24);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex25);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex26);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex27);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex28);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex29);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex30);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex31);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex32);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex33);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex34);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex35);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex36);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex37);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex38);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex39);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex40);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex41);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex42);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex43);
			UNITY_DECLARE_TEX2D_NOSAMPLER(_Tex44);
			sampler2D _SwitchTex;
			float2 maxScreenRatio;
			int _TileX, _TileY, _TargetScreenX, _TargetScreenY;
			float _PosX, _PosY, _Shift;

			// Vertex
			#pragma vertex vert
			v2f vert (appdata v) {
				v2f o;
				// Shift Quilt Area to the Center
				_Shift = 1.0 - (1.0 * min(_TargetScreenX, _TargetScreenY) / max (_TargetScreenX, _TargetScreenY));
				if(_TargetScreenX > _TargetScreenY){
					_PosX = _Shift;
				}else{
					_PosY = _Shift;
				}
				// Hide vertex to other players
				half4 showBoolTex = tex2Dlod(_SwitchTex, float4(0, 0, 0, 0));
				bool showFlag = showBoolTex.r != 0;
				// Hide vertex if screen ratio is different from _TargetScreenX / _TargetScreenY
				if(0.01<abs(1.0*_TargetScreenX/_TargetScreenY - _ScreenParams.x/_ScreenParams.y)) showFlag = 0;
				o.vertex = float4 (v.vertex.x * 2 + _PosX, v.vertex.y * -2 * _ProjectionParams.x + _PosY, 1, 1) * showFlag;
				// Adjust render area from rectangle to square
				maxScreenRatio = float2 ( _ScreenParams.x / min(_ScreenParams.x, _ScreenParams.y), _ScreenParams.y / min(_ScreenParams.x, _ScreenParams.y));
				o.uv = v.uv * maxScreenRatio;
				return o;
			}

			// Fragment
			#pragma fragment frag
			fixed4 frag (v2f i) : SV_Target {
				fixed4 col = fixed4(0,0,0,0);
				fixed2 fullUV, p;
				uint n;
				uint quiltX, quiltY;
				fullUV = fixed2 (i.uv * float2(1, -1) + float2(0, 1));
				quiltX = floor(fullUV.x * _TileX);
				quiltY = floor(fullUV.y * _TileY);
				p = fullUV * float2(_TileX,_TileY) - float2(quiltX,quiltY);
				n = quiltX + quiltY * _TileX;
				
				if(n==0)col = UNITY_SAMPLE_TEX2D(_MainTex, p);
				if(n==1)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex01, _MainTex, p);
				if(n==2)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex02, _MainTex, p);
				if(n==3)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex03, _MainTex, p);
				if(n==4)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex04, _MainTex, p);
				if(n==5)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex05, _MainTex, p);
				if(n==6)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex06, _MainTex, p);
				if(n==7)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex07, _MainTex, p);
				if(n==8)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex08, _MainTex, p);
				if(n==9)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex09, _MainTex, p);
				if(n==10)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex10, _MainTex, p);
				if(n==11)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex11, _MainTex, p);
				if(n==12)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex12, _MainTex, p);
				if(n==13)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex13, _MainTex, p);
				if(n==14)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex14, _MainTex, p);
				if(n==15)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex15, _MainTex, p);
				if(n==16)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex16, _MainTex, p);
				if(n==17)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex17, _MainTex, p);
				if(n==18)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex18, _MainTex, p);
				if(n==19)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex19, _MainTex, p);
				if(n==20)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex20, _MainTex, p);
				if(n==21)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex21, _MainTex, p);
				if(n==22)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex22, _MainTex, p);
				if(n==23)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex23, _MainTex, p);
				if(n==24)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex24, _MainTex, p);
				if(n==25)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex25, _MainTex, p);
				if(n==26)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex26, _MainTex, p);
				if(n==27)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex27, _MainTex, p);
				if(n==28)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex28, _MainTex, p);
				if(n==29)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex29, _MainTex, p);
				if(n==30)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex30, _MainTex, p);
				if(n==31)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex31, _MainTex, p);
				if(n==32)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex32, _MainTex, p);
				if(n==33)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex33, _MainTex, p);
				if(n==34)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex34, _MainTex, p);
				if(n==35)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex35, _MainTex, p);
				if(n==36)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex36, _MainTex, p);
				if(n==37)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex37, _MainTex, p);
				if(n==38)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex38, _MainTex, p);
				if(n==39)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex39, _MainTex, p);
				if(n==40)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex40, _MainTex, p);
				if(n==41)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex41, _MainTex, p);
				if(n==42)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex42, _MainTex, p);
				if(n==43)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex43, _MainTex, p);
				if(n==44)col = UNITY_SAMPLE_TEX2D_SAMPLER(_Tex44, _MainTex, p);
				clip(1.0 - i.uv.x);
				clip(1.0 - i.uv.y);
				return col;
			}
			ENDCG
		}
	}
}