Post Processing Stack과 윤곽 셰이더를 함께 사용하여 윤곽을 빛냅니다 (2)

Shader "Custom/ModelEdgeEmitShader" {
    Properties {
        [HDR] _Color ("Emission Color", Color) = (2,2,2)
        _EdgeWidth ("Edge Width", Range(0, 10)) = 1
        _Sensitivity ("Depth Sensitivity", Range(0, 100)) = 1
    }

    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue"="Transparent+100"}
        LOD 200
        ZTest LEqual Cull Back ZWrite Off

        CGPROGRAM
        #include "UnityCG.cginc"
        #pragma surface surf Standard fullforwardshadows alpha
        #pragma target 3.0

        struct Input {
            float4 screenPos;
        };

//      sampler2D_float _CameraDepthTexture;
    sampler2D_float _LastCameraDepthTexture;
        float4 _Color;
        float _EdgeWidth;
        float _Sensitivity;

        UNITY_INSTANCING_BUFFER_START(Props)
        // put more per-instance properties here
        UNITY_INSTANCING_BUFFER_END(Props)

        float edgeCheck(float2 i_uv){
            float2 txSize = 1/_ScreenParams.xy*_EdgeWidth;
            float2 base_uv = i_uv - txSize*0.5;
            float2 uv0 = base_uv;
            float2 uv1 = base_uv + txSize.xy;
            float2 uv2 = base_uv + float2(txSize.x, 0);
            float2 uv3 = base_uv + float2(0, txSize.y);

            // Convert to linear depth values.
            float z0 = Linear01Depth(SAMPLE_DEPTH_TEXTURE(_LastCameraDepthTexture, uv0));
            float z1 = Linear01Depth(SAMPLE_DEPTH_TEXTURE(_LastCameraDepthTexture, uv1));
            float z2 = Linear01Depth(SAMPLE_DEPTH_TEXTURE(_LastCameraDepthTexture, uv2));
            float z3 = Linear01Depth(SAMPLE_DEPTH_TEXTURE(_LastCameraDepthTexture, uv3));

            // Roberts cross operator
            float zg1 = z1 - z0;
            float zg2 = z3 - z2;
            return saturate(sqrt(zg1 * zg1 + zg2 * zg2)*_Sensitivity);
        }

        void surf (Input IN, inout SurfaceOutputStandard o) {
            float2 uv0 = IN.screenPos.xy / IN.screenPos.w;
            uv0.x *= _ScreenParams.w;
            float z0 = edgeCheck(uv0);
            o.Emission = _Color.rgb*z0;
            o.Alpha = z0*_Color.a;
        }
        ENDCG
    }

    Fallback Off
}