Shader "Billboard/Default" 
{
	Properties 
	{
		_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
	}
	
	SubShader
	{
		Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
		Offset -100, -1 ZWrite Off Lighting Off Cull Off Fog { Mode Off } Blend SrcAlpha OneMinusSrcAlpha
		LOD 110
		
		Pass 
		{
			CGPROGRAM
			#pragma vertex vert_vct
			#pragma fragment frag_mult 
			#pragma fragmentoption ARB_precision_hint_fastest
			#include "UnityCG.cginc"

			sampler2D _MainTex;
			float4 _MainTex_ST;

			struct vin_vct 
			{
				float4 vertex : POSITION;
				float4 color : COLOR;
				float2 texcoord : TEXCOORD0;
			};

			struct v2f_vct
			{
				float4 vertex : POSITION;
				fixed4 color : COLOR;
				half2 texcoord : TEXCOORD0;
			};

			v2f_vct vert_vct(vin_vct input)
			{
                v2f_vct output;
 
                output.vertex = mul(UNITY_MATRIX_P, 
                    mul(UNITY_MATRIX_MV, float4(0.0, 0.0, 0.0, 1.0))
                    + float4(input.vertex.x, input.vertex.y, 0.0, 0.0));
                    
                output.color = input.color;
                output.texcoord = input.texcoord;
                return output;
			}

			fixed4 frag_mult(v2f_vct i) : COLOR
			{
				fixed4 col = tex2D(_MainTex, i.texcoord) * i.color;
				return col;
			}
			
			ENDCG
		} 
	}
 
	SubShader
	{
		Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
		Offset -100, -1 ZWrite Off Blend SrcAlpha OneMinusSrcAlpha Cull Off Fog { Mode Off }
		LOD 100

		BindChannels 
		{
			Bind "Vertex", vertex
			Bind "TexCoord", texcoord
			Bind "Color", color
		}

		Pass 
		{
			Lighting Off
			SetTexture [_MainTex] { combine texture * primary } 
		}
	}
}