Shader "Custom/DepthHighlighter"
{
        Properties {
                _MainTex ("Base (RGB)", 2D) = "white" {}
                _trgDepth ("target depth", float) = 1
                _replacingColor ("replacting color", Color) = (0,1,0,0)
        }
        SubShader {
                Tags { "RenderType"="Opaque" }
                LOD 200

                CGPROGRAM
                #pragma exclude_renderers gles
                #pragma surface surf Lambert

                sampler2D _MainTex;
                sampler2D _CameraDepthTexture;
                float _trgDepth;
                float4 _replacingColor;

                struct Input
                {
                        float2 uv_MainTex;
                        float4 screenPos;
                };

                void surf (Input IN, inout SurfaceOutput o)
                {
                        half4 c = tex2D (_MainTex, IN.uv_MainTex);
                        float aa = tex2D (_CameraDepthTexture, IN.uv_MainTex).g;

                        if(aa > _trgDepth)
                        {
                            o.Albedo = c.rgb;
                        }
                        else
                        {
                            o.Albedo = _replacingColor.rgb;
                        }


                        //o.Alpha = c.a;
                }
                ENDCG
        }
        FallBack "Diffuse"
}