Returning local position as color

Question

I am trying to pass the local position of an object from vertex to fragment shader in Unity to encode it later in a rendertexture.

    Pass
    {
        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag


        #include "UnityCG.cginc"

        struct MeshData
        {
            float4 vertex : POSITION;
        };

        struct Interpolators
        {
            float4 vertex : SV_POSITION;
            float3 objectVertex : TEXCOORD0;
        };

       Interpolators vert (MeshData v)
        {
            Interpolators o;
            o.objectVertex = v.vertex.xyz;
            o.vertex = UnityObjectToClipPos(v.vertex);
            return o;
        }

         fixed4 frag (Interpolators i) : SV_Target
        {
            return  float4(i.objectVertex,1);  
        }
        ENDCG
    }

The result I want to achieve is on the right, my result is on the left: