Geometric Modeling of 2D Regions in AutoCAD Using the Marching Squares Algorithm with R-Functions. - Murodillayevich, Nuraliev Fakhriddin; Bakhtiyor ugli, Inoyatov Mirzayor; Nasriddin ugli, Ibodullaev Sardor; Bakhtiyarovna, Umarova Dildora; Eshpulatovich, Giyosov Ulugbek (Technical Journal / Tehnički Glasnik, 2026)