Invalid subscript in unity shader - unity3d

Question

Im pretty new to shader coding but I made this one by grouping 2 unlit shaders
When I try to make this shader, which is meant to create an outline and let me interpolate 2 textures unity tells me that there is this error: invalid subscript `vertex´ at line 61
Ive tried some things but i dont get this shader to work properly, if someone knows what do i have to do id be so thankful
Shader "Unlit/Combined"
{
Properties
{
_MainTex("Texture", 2D) = "white" {}
_SecondaryTex("Secondary Texture", 2D) = "white" {}
_LerpValue("Transition float", Range(0,1)) = 0.5
_OutlineColor("Outline color", color) = (0,0,0,1)
_OutlineWidth("Outline width", Range(1.0,5.0)) = 1.01
}
SubShader
{
Tags { "RenderType" = "Opaque" "Queue" = "Transparent"}
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
#pragma multi_compile_fog
#include "UnityCG.cginc"
struct appdata
{
//float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float3 normal : NORMAL;
};
struct v2f
{
float2 uv : TEXCOORD0;
UNITY_FOG_COORDS(1)
float4 outvertex : SV_POSITION;
float4 pos : POSITION;
float3 normal : NORMAL;
};
sampler2D _MainTex;
float4 _MainTex_ST;
sampler2D _SecondaryTex;
float4 _SecondaryTex_ST;
float _LerpValue;
float _OutlineWidth;
float4 _OutlineColor;
v2f vert(appdata v)
{
v2f o;
v.vertex.xyz *= _OutlineWidth;
o.outvertex = UnityObjectToClipPos(v.vertex);
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}
fixed4 frag(v2f i) : SV_Target
{
// sample the texture
fixed4 col = lerp(tex2D(_MainTex, i.uv),tex2D(_SecondaryTex, i.uv), _LerpValue);
return col;
return _OutlineColor;
}
ENDCG
}
Pass//Normal render
{
ZWrite On
Material
{
Diffuse[_Color]
Ambient[_Color]
}
Lighting On
SetTexture[_MainTex]
{
ConstantColor[_Color]
}
SetTexture[_MainTex]
{
Combine previous * primary DOUBLE
}
}
}
}

Answer 1

The line that has a problem is line 61:
v.vertex.xyz *= _OutlineWidth;
If you look at the type that v is declared as, its declared as appdata:
v2f vert(appdata v)
If you look at the definition of appdata:
struct appdata
{
//float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float3 normal : NORMAL;
};
You'll see that it does not have a vertex property, only uv and normal.
So the line that's an issue should be changed to one of those, probably normal as you're trying to modify a 3-value property of it (and uv only has xy).
v.normal.xyz *= _OutlineWidth;
Alternatively you can modify appdata to have a vertex property by uncommenteing the commented out vertex:
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
float3 normal : NORMAL;
};
Or by removing line 61, depending on what you're trying to do.