Custom Rim Glow issues

I followed:

tutorial. The end result was a pink ball with a shader error.

The error is: Shader error in 'Custom/ItemGlow': expression left of ."viewDir" is not a struct or array at line 44 (on d3d9)

The code im using is:

Shader "Custom/ItemGlow" {
Properties {
_ColorTint("Color Tint", Color) = (1,1,1,1)
_MainTex ("Albedo (RGB)", 2D) = "white" {}
_BumpMap("Normal Map", 2D) = "bump" {}
_RimColor("Rim Color", Color) = (1,1,1,1)
_RimPower("Rim Power", Range(1.0, 6.0)) = 3.0
}
SubShader {
Tags { "RenderType"="Opaque" }
//LOD 200

CGPROGRAM
#pragma surface surf Standard fullforwardshadows

// Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0

//sampler2D _MainTex;

struct Input {
float4 color : Color;
float2 uv_MainTex;
float2 uv_BumpMap;
float3 uv_viewDir;

};

float4 _ColorTint;
sampler2D _MainTex;
sampler2D _BumpMap;
float4 _RimColor;
float _RimPower;

half _Glossiness;
half _Metallic;
fixed4 _Color;

void surf (Input IN, inout SurfaceOutputStandard o) {
IN.color = _ColorTint;
o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rbg * IN.color;
o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));

half rim = (1.0 - saturate(dot(normalize(IN.viewDir), o.Normal)) );
o.Emission = _RimColor.rgb * pow(rim, _RimPower);
}
ENDCG
}
FallBack "Diffuse"
}

Is it just an outdated tutorial??? If so what do I need to change to make it work. Thanks in advanced.

 

in your input struct you have float3 uv_viewDir; but it should be float3 viewDir;
viewDir is a built in value provided by unity and it has to be written that way.

 

That was it. Thank you very much.