Below is a robust, clean AutoLISP script designed to calculate the total area of all selected closed polylines, circles, splines, regions, and hatches. It filters out open objects automatically to prevent calculation errors.
: A safety check that confirms the object possesses an inheritable Area property before attempting to read it. This prevents the script from crashing if an unhandled object type slips into the selection.
This is where routines shine. They are not "official" AutoCAD tools, but rather community-created scripts that fill a massive gap in the software’s functionality. Here is a review of why they are essential, how they work, and their pros and cons.
Hatches are a common way to represent materials, and you often need their total area. A simple LISP routine can select all hatches and sum their areas. For even more detailed analysis, you can modify the code to . A user on the CADTutor forum requested a LISP routine that would sum hatch areas for different layers (e.g., "wearing", "binder", "bitumen") and write each total to the drawing. The solution involves using (ssget '((0 . "HATCH"))) to filter only hatches, then iterating through the selection set and using a list ( lstLayers ) to accumulate areas for each layer name. total area autocad lisp
This table will now function like a mini-spreadsheet inside your AutoCAD drawing. If you move a vertex on a polyline, its cell value updates, and the formula cell updates the total automatically. You can even export this data to Excel for further analysis.
: Objects generated by third-party plugins (Civil 3D alignments or specialized architectural walls) might not respond to standard area inquiries. Explode or trace over these objects with a standard native polyline before running the routine.
: AutoLISP calculates areas based on your underlying drawing units. If you draw in millimeters, the output appears in square millimeters. To convert the final output to square meters automatically, you can modify the accumulation line in the script to divide by a conversion factor: (setq totalArea (+ totalArea (/ area 1000000.0))) . Below is a robust, clean AutoLISP script designed
user wants a long article on the keyword "total area autocad lisp". This topic covers LISP routines for calculating total areas in AutoCAD, including summing areas of multiple objects, dynamic updates, and area analysis. The article likely targets CAD professionals seeking to improve workflow efficiency.
If you always work in millimeters but need the output in square meters, you can modify the output line of the LISP code. Locate this line in the script: (princ (strcat "\n Total Area : " (rtos totalArea 2 4))) Use code with caution. Change it to divide by 1,000,000 and append a suffix:
Click and drag a selection window over all the closed loops, rooms, or hatches you want to measure. Press Enter to confirm selection. This prevents the script from crashing if an
, this script calculates the total area of various selected objects and is often paired with the command for complex drawings. Area to Field (A2F): Another popular Lee Mac routine
This comprehensive guide covers how AutoCAD LISP handles total area calculations, provides ready-to-use scripts, and explains how to automate your drafting workflow. Why Native AutoCAD Commands Fall Short for Total Area