// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'

Shader "Time of Day/Skybox"

{

	Properties

	{

	}

	CGINCLUDE

	#include "UnityCG.cginc"

	#include "TOD_Base.cginc"

	#define TOD_SCATTERING_MIE 0

	#include "TOD_Scattering.cginc"

	struct v2f {

		float4 position : SV_POSITION;

		float4 color    : TEXCOORD0;

	};

	v2f vert(appdata_base v) {

		v2f o;

		o.position = mul(UNITY_MATRIX_MVP, v.vertex);

		float3 vertex = normalize(mul((float3x3)TOD_World2Sky, mul((float3x3)unity_ObjectToWorld, v.vertex.xyz)));

		o.color = (vertex.y < 0) ? half4(pow(TOD_GroundColor, TOD_Contrast), 1) : ScatteringColor(vertex.xyz, 1);

#if !TOD_OUTPUT_HDR

		o.color = TOD_HDR2LDR(o.color);

#endif

#if !TOD_OUTPUT_LINEAR

		o.color = TOD_LINEAR2GAMMA(o.color);

#endif

		return o;

	}

	float4 frag(v2f i) : COLOR {

		return i.color;

	}

	ENDCG

	SubShader

	{

		Tags

		{

			"Queue"="Background"

			"RenderType"="Background"

			"PreviewType"="Skybox"

		}

		Pass

		{

			Cull Off

			ZWrite Off

			ZTest LEqual

			CGPROGRAM

			#pragma vertex vert

			#pragma fragment frag

			#pragma multi_compile _ TOD_OUTPUT_HDR

			#pragma multi_compile _ TOD_OUTPUT_LINEAR

			ENDCG

		}

	}

	Fallback Off

}