struct appdata
{
  float4 vertex : POSITION;
  float4 normal : NORMAL;
  float2 uv : TEXCOORD0;
};
float4 vertexAnimNormal(float4 vertPosition,float4 normal)
{
   vertPosition+= sin((normal+ _Time.y *_Speed)* _Frequency ) *( _Amplitude * normal);
   return vertPosition;
}

v2f vert (appdata v)
{
   v2f o;

   v.vertex = vertexAnimNormal(v.vertex,v.normal,v.uv);
   o.vertex = UnityObjectToClipPos(v.vertex);

   o.uv = TRANSFORM_TEX(v.uv, _MainTex);
   UNITY_TRANSFER_FOG(o,o.vertex);
   return o;
}