BEGIN_OPTIONS
END_OPTIONS

BEGIN_PROPERTIES
	[NoScaleOffset]_MainTex("Albedo (RGB) Alpha (A)", 2D) = "white" {}
	[NoScaleOffset][Normal]_BumpMap("Normal (RGBA)", 2D) = "bump" {}
	[NoScaleOffset]_MetallicGlossMap("Metallic (R) Occlusion (G) Smoothness (B)", 2D) = "white" {}
	[NoScaleOffset]_EmissionMap("Emission (RGB)", 2D) = "white" {}

	_Color("Color", Color) = (1,1,1,1)
	_BumpScale("Normal Map Strength", Range(0,5)) = 1
	_Metallic("Metallic", Range(0,1)) = 0
	_GlossMapScale("Smoothness", Range(0,1)) = 1
	_Emission("Emission", Color) = (0,0,0)
	_Tiling("Tiling", Float) = 1.0
END_PROPERTIES

BEGIN_CBUFFER
	float4 _Color;
	float  _BumpScale;
	float  _Metallic;
	float  _GlossMapScale;
	float3 _Emission;
	float  _Tiling;
END_CBUFFER

BEGIN_CODE
	TEXTURE2D(_MainTex);
	SAMPLER(sampler_MainTex);
	TEXTURE2D(_BumpMap);
	SAMPLER(sampler_BumpMap);
	TEXTURE2D(_MetallicGlossMap);
	SAMPLER(sampler_MetallicGlossMap);
	TEXTURE2D(_EmissionMap);
	SAMPLER(sampler_EmissionMap);

	void SurfaceFunction(inout Surface o, ShaderData d)
	{
		float2 coord   = d.texcoord0.xy * _Tiling;
		float4 texMain = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, coord);
		float4 gloss   = SAMPLE_TEXTURE2D(_MetallicGlossMap, sampler_MetallicGlossMap, coord);
		float4 bump    = SAMPLE_TEXTURE2D(_BumpMap, sampler_BumpMap, coord);
		float4 glow    = SAMPLE_TEXTURE2D(_EmissionMap, sampler_EmissionMap, coord);

		#if !_SKIP_ALPHA_CLIP
			clip(texMain.a * d.vertexColor.a * _Color.a - 0.5f);
		#endif

		o.Albedo     = texMain.rgb * d.vertexColor.rgb * _Color.rgb;
		o.Normal     = UnpackScaleNormal(bump, _BumpScale);
		o.Metallic   = gloss.r * _Metallic;
		o.Occlusion  = gloss.g;
		o.Smoothness = gloss.b * _GlossMapScale;
		o.Emission   = glow.rgb * _Emission;
		o.Alpha      = texMain.a * d.vertexColor.a * _Color.a;
	}
END_CODE