Shader "Unlit/TwoTexOffsetMask"
{
    Properties
    {
        [HDR] _MainCol("MainCol",color) = (1,1,1,1)
        _MainTex("Texture", 2D) = "white" {}
        _OffsetSpeed("OffsetSpeed",vector) = (1,1,0,0)
        [HDR] _MainCol2("MainCol2",color) = (1,1,1,1)
        _MainTex2("Texture2", 2D) = "white" {}
        _OffsetSpeed2("OffsetSpeed2",vector) = (1,1,0,0)
        _MainTex2Mask("MainTex2Mask", 2D) = "white" {}
        _MainTex2NiuQu("MainTex2NiuQu", 2D) = "white" {}
        _OffsetSpeed3("OffsetSpeed3",vector) = (1,1,0,0)
        _ShiJianDuan("ShiJianDuan",Range(0.1,5))=1
        _MainAlpha("MainAlpha",Range(0,1)) = 0.5
        _MiuQuLength("MiuQuLength",Range(0,1))=0.5
        _FinalAlphaFactor("FinalAlphaFactor",Range(0,1))=1
    }
        SubShader
        {
            Tags {"Queue" = "Transparent" "RenderType" = "Transparent" }


            Pass
            {
                ZTest Off
                ZWrite Off
                Blend SrcAlpha OneMinusSrcAlpha


                CGPROGRAM


                #pragma vertex vert
                #pragma fragment frag


                #include "UnityCG.cginc"

                struct appdata
                {
                    float4 vertex : POSITION;
                    float2 uv : TEXCOORD0;
                    half4 color : COLOR;
                };
                struct v2f
                {
                    float4 uv : TEXCOORD0;
                    float4 uv2 : TEXCOORD2;
                    float4 vertex : SV_POSITION;
                    half4 color: TEXCOORD1;
                };

                sampler2D _MainTex,_MainTex2,_MainTex2Mask, _MainTex2NiuQu;
                float4 _MainTex_ST,_MainTex2_ST,_MainTex2Mask_ST,_MainTex2NiuQu_ST;
                half4 _MainCol,_MainCol2;
                float4 _OffsetSpeed,_OffsetSpeed2, _OffsetSpeed3;
                float _ShiJianDuan, _MainAlpha, _MiuQuLength ,_FinalAlphaFactor;
                v2f vert(appdata v)
                {
                    v2f o;
                    o.vertex = UnityObjectToClipPos(v.vertex);
                    o.uv.xy = v.uv * _MainTex_ST.xy + _MainTex_ST.wz + _Time.y * _OffsetSpeed.xy;
                    o.uv.zw = v.uv * _MainTex2_ST.xy + _MainTex2_ST.wz + _Time.y * _OffsetSpeed2.xy;
                    o.uv2.xy = v.uv * _MainTex2Mask_ST.xy + _MainTex2Mask_ST.wz;
                    o.uv2.zw = v.uv * _MainTex2NiuQu_ST.xy + _MainTex2NiuQu_ST.wz + _Time.y * _OffsetSpeed3.xy;
                    o.color = v.color;
                    return o;
                }

                half4 frag(v2f i) : SV_Target
                {
                    half4 col = tex2D(_MainTex, i.uv.xy) * _MainCol * i.color;

                    half niuqu = tex2D(_MainTex2NiuQu, i.uv2.zw).r-0.5;
                    i.uv.zw += float2(niuqu, niuqu)* _MiuQuLength;
                    half mask = tex2D(_MainTex2Mask, i.uv2.xy).a;

                    half4 col2 = tex2D(_MainTex2, i.uv.zw) * _MainCol2 * i.color;
                    col.rgb *= col.a;
                    col2.rgb *= col2.a* mask;
                    col += col2;
                    col.a = saturate(col.a);
                    float t = _Time.y * _ShiJianDuan;
                    float alpha =max( abs(sin(t)), _MainAlpha);
                    col.a *= alpha;
                    col.a *= _FinalAlphaFactor;
                    return col * i.color;
                }
                ENDCG
            }
        }
}