unrecognized identifier 'Attributes' ... (on d3d11)

Questions & Answers
1

Hi I trying to make a shader to make an outline like toons or something like that. But in the .hlsl file the compiler mark this error and I don’t understand it

This is the code on hlsl file:

#ifndef BACKFACEOUTLINES_INCLUDED
#define BACKFACEOUTLINES_INCLUDED

// Include helper functions form URP
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

// Data from meshes
struct Attribures {
	float4 positionOS			: POSITION;	// Position in obj space
	float3 normalOS				: NORMAL;	// Normal vector in object space
};

// Output from the vertex functions and input to the fragment function
struct VertexOutput {
	float4 positionCS		: SV_POSITION; // Position in clip space
};

//Properties
float _Thickness;
float4 _Color;

VertexOutput Vertex(Attributes input) {
	VertexOutput output = (VertexOutput)0;

	float3 normalOS = input.normalOS;

	// Extrude the object space position along a normal vector
	float3 posOS = input.positionOS.xyz + normalOS * _Thickness;
	// Convert this position to world and clip space
	output.positionCS = GetVertexPositionInputs(posOS).positionCS;

	return output;
}

float4 Fragment(VertexOutput input) : SV_Target{
	return _Color;
}
#endif

The error happens in this line: VertexOutput Vertex(Attributes input)

And this is the code form shader

Shader "Outlines/BackFaceOutlines" {
    Properties {
        _Thickness("Thickness", Float) = 1
        _Color("Color", Color) = (1, 1, 1, 1)
    }
    SubShader {
        Tags { "RenderType"="Opaque" "RenderPipeline" = "UniversalPipeline" }

        Pass
        {
            Name "Outlines"
            // Cull front faces
            Cull Front

            HLSLPROGRAM
            // Standard URP requirements
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x

            // Register functions
            #pragma vertex vert
            #pragma fragment frag

            // Include logic files
            #include "BackFaceOutlines.hlsl"

            ENDHLSL
        }
    }
}

I’m using Unity 2020.3.26f1

Hope can help me.

2

In case if you havent already found out the answer for this,

In the actual .shader file you have to specify all the shader functions (vertex, fragment, geometry, ect…) that youre going to use in that shader pass.
Line 21 #pragma vertex tells the compiler which function should be used as the vertex function. Same goes for the Line 22.
So in those lines, just change the vert to Vertex and frag to Fragment and that should fix the error.