SBF_CliVer

    //: Vertical Intersection Of Point And Circle
    //: www.twitch.com/kanjicoder
    //: https://www.etsy.com/shop/DekTen
    //: ANIMATED_GIF_OF_THIS_CODE: https://imgur.com/gallery/wIPuIES

    //:COPIED_FROM[ R:\G\UP\MSB\SBF.SCAD ]===================://

        //:Circle_Line_Intersect:VERTICAL_RAY_FROM_POINT
        function SBF_CliVer(
            p_t
        ,   cen
        ,   rad
        )=([
            p_t[0] //:X_IS_SAME_FOR_VERTICAL_INTERSECTION
            ,
            ( //:<<<<<<< h_y:HIT_Y(intersection_y)

                ( cen[1]+SBF_IGT(p_t[1],cen[1])*sin( //:C_F:BEG

                    acos((p_t[0]-cen[0])/rad)  //:__ANG__

                )*rad )  //:<<<<<<<<<<<<<<<<<<<<<<<<<<<:C_F:END

            ) //:<<<<<<< h_y:HIT_Y(intersection_y)
        ]);;

        //: IGT:Is_Greater_Than:
        //:     TRUE: Return 0+1
        //:    FALSE: Return 0-1
        function
        SBF_IGT( p_t , cen )=(

            p_t >= cen ? 0+1 :
            p_t <  cen ? 0-1 : 0

        );;

    //:==================:COPIED_FROM[ R:\G\UP\MSB\SBF.SCAD ]://