Shader "Custom/Grass" {

    Properties {

        _MainTex ("Grass Texture", 2D) = "white" {}

        _TimeScale ("Time Scale", float) = 0.2

    }  

    SubShader{

        Tags{"Queue"="Transparent" "RenderType"="Opaque" "IgnoreProject"="True"}

        Pass{

            Tags{"LightMode"="ForwardBase"}  

            ZWrite Off

            Blend SrcAlpha OneMinusSrcAlpha

            Cull Off  

            CGPROGRAM

            #pragma vertex vert

            #pragma fragment frag

            #include "UnityCG.cginc"   

            sampler2D _MainTex;

            half _TimeScale;  

            struct a2v {

                float4 vertex : POSITION;

                float4 texcoord : TEXCOORD0;

            };  

            struct v2f {

                float4 pos : SV_POSITION;

                float2 uv : TEXCOORD0;

            };  

            v2f vert(a2v v){

                v2f o;

                float4 offset = float4(,,,);

                offset.z = sin(3.1415 * _Time.y * clamp(v.texcoord.y-0.5, , ))  * _TimeScale;

                o.pos = UnityObjectToClipPos(v.vertex + offset);

                o.uv = v.texcoord.xy;

                return o;

            }  

            fixed4 frag(v2f i) : SV_Target{

                return tex2D(_MainTex, i.uv);

            }  

            ENDCG

        }

    }

    FallBack Off

}