투명디스플레이 연구사업

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Custom/BlurShader" {

	Properties {

		_MainTex ("Base (RGB)", 2D) = "white" {}

		_Amount ("Blur Amount", Range(0,4)) = 1

	}

	CGINCLUDE

	#include "UnityCG.cginc"

	sampler2D _MainTex;

	float4 _MainTex_TexelSize;

	float _Amount;

	float _Threshold;

	struct v2f {

		float4 pos : POSITION;

		float2 uv : TEXCOORD0;

	};

	struct v2f_off {

		float4 pos : POSITION;

		float2 uv[8] : TEXCOORD0;

	};

	v2f vert (appdata_img v)

	{

		v2f o;

		o.pos = UnityObjectToClipPos (v.vertex);

		o.uv = v.texcoord.xy;

		return o;

	}

	v2f_off vertOff (appdata_img v)

	{

		v2f_off o;

		o.pos = UnityObjectToClipPos (v.vertex);

		float2 uv = v.texcoord.xy;

		float2 up = float2(0.0, _MainTex_TexelSize.y) * _Amount;

		float2 right = float2(_MainTex_TexelSize.x, 0.0) * _Amount;	

		o.uv[0].xy = uv + up;

		o.uv[1].xy = uv - up;

		o.uv[2].xy = uv + right;

		o.uv[3].xy = uv - right;

		o.uv[4].xy = uv - right + up;

		o.uv[5].xy = uv - right -up;

		o.uv[6].xy = uv + right + up;

		o.uv[7].xy = uv + right -up;

		return o;

	}

	half4 fragOff (v2f_off i) : COLOR

	{

		float4 col = tex2D(_MainTex, (i.uv[0] + i.uv[1]) * 0.5);

		float4 newCol = 0;

		newCol.rgb = col.rgb;

		int count = 1;

		for (int pix = 0; pix < 8; pix ++) {

			if (i.uv[pix].x <= 1.0 && i.uv[pix].y <= 1.0 && i.uv[pix].x >= 0.0 && i.uv[pix].y >= 0.0) {

				newCol += tex2D(_MainTex, i.uv[pix]);

				count ++;

			}

		}

		newCol = ((newCol + col) / (count + 1));

		return newCol;

	}

	ENDCG

	SubShader {

		ZTest Always Cull Off ZWrite Off

		pass {

			CGPROGRAM

			#pragma vertex vertOff

			#pragma fragment fragOff

			#pragma target 3.0

			ENDCG

		}

	}

}