Shader "URP_Test/PostOutline_1"
{
    Properties
    {
        _PureColor ("PureColor", Color) = (1,1,1,1)
    }
    SubShader
    {
        Tags
        {
            "RenderType"="Opaque"
            "RenderPipeline" = "UniversalPipeline"
        }

        Cull Off 
        ZWrite Off 
        ZTest Off

        Pass
        {
            Name "DrawPureColor"
            Tags
            {
                "LightMode" = "Outline"
            }
            Cull Front
            ZTest Off
            ZWrite Off
            
            // 纯色
            HLSLPROGRAM
            #pragma vertex VERT
            #pragma fragment FRAG
            #pragma target 2.0

            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

            CBUFFER_START(UnityPerMaterial)

                float4 _PureColor;

            CBUFFER_END

            struct a2v
            {
                float4 positionOS   : POSITION;
                float2 uv0          : TEXCOORD;
            };

            struct v2f
            {
                float4 positionCS : SV_POSITION;
                float4 texcoord0  : TEXCOORD0;
            };

            v2f VERT(a2v i)
            {
                v2f o;
                o.positionCS = TransformObjectToHClip(i.positionOS.xyz);
                o.texcoord0 = float4(0,0,0,0);
                return o;
            }

            half4 FRAG(v2f i):SV_TARGET
            {
                return half4(_PureColor.xyz, 1);
            }
            ENDHLSL
        }
        
    }
}