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

// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

Shader "Unlit/DissolveEffect2"  
{  
    Properties  
    {  
		_MainTex("Base (RGB)", 2D) = "white" {}
		//_ParentAlpha("_ParentAlpha", Float) = 15
		_ParentDist("_ParentDist", Float) = 0
		_ParentPos("ParentPos", Vector) = (0,0,0,0)
		_PlaneDir("PlaneDir", Vector) = (1,-0.6,0,0)

    }  
		SubShader
		{
			//Tags
		//{
			//"Queue" = "Transparent"
			//"RenderType" = "Transparent"
		//}
			Pass
		{
		//Blend SrcAlpha OneMinusSrcAlpha
		CGPROGRAM
#pragma vertex vert    
#pragma fragment frag    
#include "UnityCG.cginc"    
	
		sampler2D _MainTex;
		float4 _MainTex_ST; 
		uniform half _ParentDist;
		//uniform half _ParentAlpha;
		uniform half4 _ParentPos;
		uniform half4 _PlaneDir;

		
		struct v2f {
			half4 vertex : POSITION;
			float2 uv : TEXCOORD0;
			float3 posWorld : TEXCOORD1;
		};

		v2f vert(appdata_base v) {
			v2f o;
			o.posWorld = mul(unity_ObjectToWorld, v.vertex).xyz;
			o.vertex = UnityObjectToClipPos(v.vertex);
			o.uv = v.texcoord;
			return o;
		}

  
		fixed4 frag(v2f v) : COLOR
        {  
        	_ParentPos.x = -_ParentDist;
			half3 viewDirection = normalize(v.posWorld.xyz - _ParentPos.xyz);
			half angle = dot(_PlaneDir, viewDirection);
			_ParentPos.x = +_ParentDist;
			viewDirection = normalize(v.posWorld.xyz - _ParentPos.xyz);
			half angle2 = dot(_PlaneDir, viewDirection);
			half2 di = half2(_ParentDist/13, 0); 
			if (angle2 < 0)
			{
				di.x = -_ParentDist/13; 
			}
			if (angle > 0 && angle2 < 0)
			{
				clip(-1);
			}
			else
			{
				clip(1);
			}
		
			float2 uv =  v.uv - di;
			fixed4 col = tex2D(_MainTex,TRANSFORM_TEX(uv,_MainTex)); 
			//fixed4 col = tex2D(_MainTex, v.uv);
			//col.a = 1 - _ParentDist / _ParentAlpha;  
			return col;
		}
			ENDCG
		}
		}
			//FallBack "Diffuse"
}