;;; TOTAREA.LSP - Calculate total area of selected objects ;;; Command: TOTAREA ;;; Supports: LWPOLYLINE, CIRCLE, ELLIPSE, SPLINE, REGION, HATCH (defun C:TOTAREA ( / ss total area obj_name obj_list i ent) (princ "\nSelect objects to calculate total area: ")
For a professional drafter, learning to load and modify a simple Lisp like TOTAREA is a rite of passage. It is the single highest ROI automation you can implement today. The humble "Total Area Lisp" transforms a manual, error-prone chore into a one-click solution. Whether you are calculating rentable square footage for a commercial lease, seeding quantities for a golf course, or material takeoffs for flooring, this tool is indispensable. total area autocad lisp
;; Step 3: Loop through each object in the selection set (repeat (sslength ss) (setq ent (ssname ss i)) ; Get entity name (setq obj_name (cdr (assoc 0 (entget ent)))) ; Get object type ;; Step 4: Calculate area based on object type (cond ;; For Polylines, Circles, Ellipses, Splines ((member obj_name '("LWPOLYLINE" "CIRCLE" "ELLIPSE" "SPLINE")) (command "_.AREA" "_Object" ent) (setq area (getvar "AREA")) ) ;; For Regions ((equal obj_name "REGION") (setq area (vla-get-area (vlax-ename->vla-object ent))) ) ;; For Hatches ((equal obj_name "HATCH") (setq area (vla-get-area (vlax-ename->vla-object ent))) ) ) ;; Step 5: Add area to total (if area (setq total (+ total area)) (princ (strcat "\nWarning: Could not compute area for object " (itoa i))) ) (setq i (1+ i)) ; Increment counter (setq area nil) ; Reset area variable ) ; end repeat ;; Step 6: Display the result (princ "\n=========================================") (princ (strcat "\n>>> TOTAL AREA: " (rtos total 2 2) " square units <<<")) (princ "\n=========================================") ) ; end progn ) ; end if (princ) ; Clean exit ) For AutoCAD 2020 and newer (including LT? Note: LT does not support Lisp ) If you are using full AutoCAD (not LT), follow these steps: ;;; TOTAREA
;; Step 1: Create a selection set (setq ss (ssget '((0 . "LWPOLYLINE,CIRCLE,ELLIPSE,SPLINE,REGION,HATCH")))) Whether you are calculating rentable square footage for
Do you have a specific requirement for your total area Lisp (e.g., export to CSV, subtract voids, or add prefixes)? Write a comment below or modify the code as shown in Part 4 – the power of open-source Lisp is that it is infinitely customizable.
Introduction: The Pain Point of Polyline Area Calculation