// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

// Simplified Diffuse shader. Differences from regular Diffuse one:
// - no Main Color
// - fully supports only 1 directional light. Other lights can affect it, but it will be per-vertex/SH.

Shader "Carmen/UVGradient"
{
	Properties
	{
        _TopColour ("Top Colour", Color) = (1,1,1,1)
        _BottomColour ("Bottom Colour", Color) = (0,0,0,1)
	}
	SubShader
	{
		Tags { "RenderType"="Opaque" }
		LOD 200

		Pass {
			Cull Back

			CGPROGRAM
			#include "UnityCG.cginc"

			#pragma vertex vert
			#pragma fragment frag
			
			sampler2D _MainTex;
			float4 _MainTex_ST;
            fixed4 _TopColour;
            fixed4 _BottomColour;

			CBUFFER_START(UnityPerMaterial)
			uniform float4 _Emission;
			CBUFFER_END

			struct Data
			{
				float4 vertex : POSITION;
				float2 uv : TEXCOORD0;
				fixed4 colour : COLOR0;
			};

			struct V2F
			{
				float2 uv : TEXCOORD0;
				float4 position : SV_POSITION;
				fixed4 colour : COLOR0;
			};

			
			V2F vert(Data v)
			{
				V2F o;
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				o.position = UnityObjectToClipPos(v.vertex);
				o.colour = v.colour;
				return o;
			}

			fixed4 frag(V2F i) : SV_TARGET
			{
				return fixed4(lerp(_BottomColour.rgb, _TopColour.rgb, i.uv.y).rgb, 1.0);
			}

			ENDCG
		}
	}

	FallBack "VRChat/Mobile/Standard Lite"
}