Shader "MyShader/Illusion/Alpha" {
Properties {
    _TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5)
    _MainTex ("Particle Texture", 2D) = "white" {}
    _MulRatio("MulRatio", Range(0, 5)) = 1
}

Category {
    Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
    Blend SrcAlpha OneMinusSrcAlpha
    Cull Off Lighting Off ZWrite Off Fog { Mode off }
    
    SubShader {
        Pass {
        
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile_particles
            #pragma multi_compile_fog
            #include "UnityCG.cginc"

            sampler2D _MainTex;
            float4 _MainTex_ST;
            fixed4 _TintColor;
            fixed _MulRatio;
            
            struct appdata_t {
                float4 vertex : POSITION;
                fixed4 color : COLOR;
                float2 texcoord : TEXCOORD0;
            };

            struct v2f {
                float4 vertex : POSITION;
                fixed4 color : COLOR;
                float2 texcoord : TEXCOORD0;
                UNITY_FOG_COORDS(1)
            };

            v2f vert (appdata_t v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.color = v.color * _TintColor;
                o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);
                UNITY_TRANSFER_FOG(o,o.vertex);
                return o;
            }

            half4 frag (v2f i) : COLOR
            {
                half4 result = 2.0f * i.color * tex2D(_MainTex, i.texcoord);
                result.a = saturate(result.a);
                UNITY_APPLY_FOG(i.fogCoord, result);
                result.rgb *= _MulRatio;
                return result;
            }
            ENDCG 
        }
    }   
}
}