             } 
 
             sampler2D _MainTex;
-            uniform float2 _Center;
             uniform float _Radius;
             uniform float _Sigma;
             uniform float _Amplitude;

            #pragma vertex vert
			#pragma fragment frag
            #pragma target 3.0

            v2f_img vert( appdata_img v ) { 
            	v2f_img o;
            	o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
            	o.uv = MultiplyUV( UNITY_MATRIX_TEXTURE0, v.texcoord );
	            #if UNITY_UV_STARTS_AT_TOP
	        		o.uv.y = 1-o.uv.y;
				#endif

            }

            fixed4 frag (v2f_img i) : COLOR{
            	float2 u = i.uv;
            	float2 u1 = u;
            	u1.x *= _Ratio;
            	float l = length(u1);
