Unity でグリッド描くやつ

GridRect.shader

Shader "Grid/Rect" {
    Properties {
        _Color("Color", Color) = (0.5, 0.5, 0.5, 1.0)
        _Width("Width", Range(0.0, 1.0)) = 0.5
        _GridNumX("GridNumX", Int) = 10
        _GridNumY("GridNumY", Int) = 10
    }
    SubShader {
        Pass {
            CGPROGRAM

            #pragma vertex vert_img
            #pragma fragment frag

            #include "UnityCG.cginc"
            
            uniform half _Width;
            uniform int _GridNumX;
            uniform int _GridNumY;
            uniform half4 _Color;

            half4 frag(v2f_img i) : COLOR {
                half x0 = fmod(i.uv.x * _GridNumX, 1.0);
                half y0 = fmod(i.uv.y * _GridNumY, 1.0);
                half p  = pow(1/ _Width, 2);
                half x1 = pow(x0,       p);
                half y1 = pow(y0,       p);
                half x2 = pow(1.0 - x0, p);
                half y2 = pow(1.0 - y0, p);
                return ((x1 + x2) + (y1 + y2)) / 2 * _Color;
            }

            ENDCG
        }
    }
}