Shader "Unlit/StripeShader"
{
    Properties
    {
        // Color property for material inspector, default to white
        // _Color is the color of the grid lines, actually (need to flip these
        // at some point)
        _Color ("Main Color", Color) = (1,1,1,0.5)
        // _Color2 is actually the main body color
        _Color2 ("Other Color", Color) = (1,1,1,0.5)
        // Offset the grid pattern
        _OffsetX ("X Offset", Float) = 0
        _OffsetY ("Y Offset", Float) = 0
    }
    SubShader
    {
        // TODO: Figure out why transparency doesn't actually work right now
        Tags { "Queue"="Transparent" "RenderType"="Transparent" "IgnoreProjector"="True" }
        Pass
        {
          ZWrite Off
          Blend DstAlpha OneMinusDstAlpha

          CGPROGRAM
          #pragma vertex vert
          #pragma fragment frag

          float4 vert (float4 vertex : POSITION) : SV_POSITION
          {
            // Basically just pass through the vertex coordinates in scale
            return mul(UNITY_MATRIX_MVP, vertex);
          }

          // color from the material
          fixed4 _Color;
          fixed4 _Color2;
          float _OffsetX;
          float _OffsetY;

          // pixel shader, no inputs needed
          fixed4 frag (float4 i : POSITION) : COLOR
          {
            // First two out of 10 pixel along either access, return hash color
            if((i.x + _OffsetX) % 10.0f < 2.0f || (i.y + _OffsetY) % 10.0f < 2.0f) {
              return _Color;
            } else {
              // Return main body color
              return _Color2;
            }
          }
          ENDCG
        }
    }
}