Shader "BF/Effect/eff_dissolve_alp_r"
{
    Properties
    {
        _TintColor ("Tint Color", Color) = (1,1,1,1)
        _MainTex ("Particle Texture", 2D) = "white" {}
        _ColorMaskTex ("Color Mask Texture", 2D) = "white" {}
		[Toggle(_MASK_UV_SPEED_CUSTOM)]_MASK_UV_SPEED_CUSTOM("粒子custom1.zw(uv1.xy)控制mask uv偏移",int) = 0
		[Toggle(_HIDE_Y)] _HIDE_Y("隐藏Y轴坐标0以下的部分", int) = 0
        _Level("Brightness", Float) = 1
    }

    CGINCLUDE
	#include "UnityCG.cginc"

	uniform sampler2D _MainTex;
	uniform sampler2D _ColorMaskTex;
	uniform half4 _MainTex_ST;
	uniform half4 _ColorMaskTex_ST;
	half4 _TintColor;
	half _Level;

	struct appdata {
		float4 vertex : POSITION;
		half4 texcoord : TEXCOORD0;
		#if _MASK_UV_SPEED_CUSTOM
        half4 texcoord1 : TEXCOORD1;
        #endif
		half4 color : COLOR0;
	};

	struct v2f {
		float4 pos : SV_POSITION;
		half2	uv : TEXCOORD0;
		half2	uv2 : TEXCOORD1;
		fixed4 uv_custom : TEXCOORD2;
		half4 color : COLOR;
		#if _HIDE_Y
        fixed worldPosY : TEXCOORD3;
        #endif
	};

	v2f vert (appdata v)
	{
		v2f o;
		UNITY_INITIALIZE_OUTPUT(v2f, o);
		o.pos = UnityObjectToClipPos (v.vertex);
		o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
		o.uv2 = TRANSFORM_TEX(v.texcoord, _ColorMaskTex);
		o.color = v.color;
		o.uv_custom.xy = v.texcoord.zw;
		#if _MASK_UV_SPEED_CUSTOM
        o.uv_custom.zw = v.texcoord1.xy;
        #endif
		#ifdef _HIDE_Y
        fixed3 worldPos = mul(unity_ObjectToWorld , v.vertex).xyz;
        o.worldPosY = worldPos.y;
        #endif
		return o;
	}

	half4 frag (v2f i) : COLOR
	{
		half4 clr = tex2D( _MainTex, i.uv + i.uv_custom.xy);
		#if _MASK_UV_SPEED_CUSTOM
		half4 alpha = tex2D( _ColorMaskTex, i.uv2 + i.uv_custom.zw);
        #else
		half4 alpha = tex2D( _ColorMaskTex, i.uv2 );
        #endif
		half4 texcol = half4(1,1,1,1);
		texcol.rgb = clr.rgb * _TintColor.rgb * _Level * i.color.rgb;
		texcol.a = clr.a;
		#ifdef _HIDE_Y
        texcol *= step(0, i.worldPosY);
        #endif
		clip(texcol.a * alpha.r * i.color.a * _TintColor.a - 0.1f);
		return texcol;
	}

	ENDCG

    SubShader
    {
        Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
        cull Off

        Pass
        {

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
			#pragma shader_feature_local _MASK_UV_SPEED_CUSTOM
			#pragma shader_feature_local _HIDE_Y

            ENDCG
        }
    }
    Fallback Off
}