UnityDissolveBounds shader

Shader "Custom/Dissolve/BoundsWorld/Opaque" {
	Properties{
		_Color("Color", Color) = (1,1,1,1)
		_MainTex("Albedo (RGB)", 2D) = "white" {}
		_Glossiness("Smoothness", Range(0,1)) = 0.5

		[NoScaleOffset] _MetallicGlossMap("Metallic", 2D) = "white" {}
		[Gamma]  _Metallic ("Metallic", Range(0.000000,1.000000)) = 0.000000
		_BoxCenter("Box Center", Vector) = (0,0,0,0)
		_BoxSize("Box Size", Vector) = (0,0,0,0)
		_Distance("Dissolve Distance", Float) = 1
		_Interpolation("Dissolve Interpolation", Range(0,5)) = 1
		_DissTexture("Dissolve Texture", 2D) = "white" {}
		[HDR]_DissolveColor("Dissolve Color", Color) = (0,1,0,1)

		[NoScaleOffset] _BumpMap ("Normal Map", 2D) = "bump" {}
		_BumpScale ("Normal Influence", Range(0,10)) = 0.5

		[HDR]_EmissionColor ("Color", Color) = (0.000000,0.000000,0.000000,1.000000)
		[NoScaleOffset]_EmissionMap ("Emission", 2D) = "white" { }
	}

	  CGINCLUDE
        //@TODO: should this be pulled into a shader_feature, to be able to turn it off?
        #define _GLOSSYENV 1
        #define UNITY_SETUP_BRDF_INPUT SpecularSetup
    ENDCG

		SubShader{
			Tags { "RenderType" = "Opaque" }
			LOD 200

			// Extracts information for lightmapping, GI (emission, albedo, ...)
			// This pass is not used during regular rendering.
			Pass
			{
				Name "META"
				Tags { "LightMode"="Meta" }

				Cull Off

				CGPROGRAM
				#pragma vertex vert_meta
				#pragma fragment frag_meta

				#pragma shader_feature _EMISSION
				#pragma shader_feature _METALLICGLOSSMAP

				#include "UnityStandardMeta.cginc"
				ENDCG
			}

			CGPROGRAM

		#include "UnityPBSLighting.cginc"
		// Physically based Standard lighting model, and enable shadows on all light types
		#pragma surface surf Standard addshadow

		// Use shader model 3.0 target, to get nicer looking lighting
		#pragma target 3.0

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float2 uv_DissTexture;
			float3 worldPos;
		};

		half _Metallic;
		half _Glossiness;
		sampler2D _MetallicGlossMap;

		sampler2D _EmissionMap;
		float4 _EmissionColor;
		float4 _DissolveColor;

		sampler2D _BumpMap;

		half _Distance;
		half _Interpolation;
		half _BumpScale;

		sampler2D _DissTexture;

		float4 _BoxCenter,_BoxSize;

		fixed4 _Color;

		void surf(Input IN, inout SurfaceOutputStandard o) {

			float3 surfacePos = IN.worldPos.xyz;

			//float3 objectCenterWorld = _Object2World[3].xyz;//float3(0,0,0) * mul(unity_ObjectToWorld, float4(0, 0, 0, 1));

			float dx = min(((_BoxCenter.x + _BoxSize.x) - surfacePos.x), (surfacePos.x - (_BoxCenter.x - _BoxSize.x)));
			float dy = min(((_BoxCenter.y + _BoxSize.y)-surfacePos.y), (surfacePos.y - (_BoxCenter.y - _BoxSize.y)));
			float dz = min(((_BoxCenter.z + _BoxSize.z) - surfacePos.z), (surfacePos.z - (_BoxCenter.z - _BoxSize.z)));

			clip((dx));
			clip((dy));
			clip((dz));

			fixed4 c = tex2D(_MetallicGlossMap, IN.uv_MainTex);
			o.Metallic = c.r * _Metallic ;
			o.Smoothness = _Glossiness * c.a;

			c = tex2D(_MainTex, IN.uv_MainTex);
			o.Albedo = c.rgb * _Color.rgb;

			o.Normal = normalize(UnpackScaleNormal (tex2D (_BumpMap, IN.uv_BumpMap) , _BumpScale));

			o.Emission = tex2D(_EmissionMap, IN.uv_MainTex) * _EmissionColor;
			o.Alpha = c.a;
		}
		ENDCG
		}
		Fallback "Diffuse"
}