Shader "DungeonArchitect/Unlit/LinkHeadShader"
{
    Properties
    {
    }
    SubShader
    {
        Tags {
            "Queue"="Transparent" 
            "IgnoreProjector"="True" 
            "RenderType"="Transparent"
        }
        LOD 100
        
        Blend SrcAlpha OneMinusSrcAlpha

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
                float4 color : COLOR;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float4 color : COLOR;
            };

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                o.color = v.color;
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                float distFromCenter = abs(i.uv.y - 0.5) * 2;
                float threshold = 1 - i.uv.x;
                return (distFromCenter < threshold) ? i.color : float4(0, 0, 0, 0);
            }
            ENDCG
        }
    }
}