(defun c:ConvexHull (/ ss pts hull) (vl-load-com) (if (setq ss (ssget '((0 . "POINT")))) (progn ;; Extract points from selection set (setq pts (mapcar '(lambda (x) (cdr (assoc 10 (entget x)))) (vl-remove-if 'listp (mapcar 'cadr (ssnamex ss))) ) )
(Graham scan algorithm – save as .lisp and load with APPLOAD ):
Quickly define the outer boundary for a site plan or survey data. convex hull autocad
Reduce thousands of survey points into a manageable outline for faster rendering and calculations. How to Create a Convex Hull in AutoCAD 1. Using LISP Scripts (The Most Common Method)
Identify the extent of geographic features, such as the perimeter of a disease outbreak or a chemical leak. (defun c:ConvexHull (/ ss pts hull) (vl-load-com) (if
Master Convex Hulls in AutoCAD: Tools, Scripts, and Practical Uses
A line drawn through a convex polygon will intersect it exactly twice. Comparison of Methods Level of Effort AutoLISP Scripts Everyday CAD tasks, free solutions Moderate (requires loading script) Spatial Manager Professional GIS/Surveying workflows Low (one-click command) Custom .NET API Software developers building custom tools High (requires C# or VB.NET coding) How to Create a Convex Hull in AutoCAD 1
A widely used script that implements the Graham Scan algorithm to efficiently calculate hulls with complexity.