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Found 2 results

1. ## VLisp Calc. vs. Excel Calc.

Hi everybody, I am converting some excel formulas to Visual Lisp. I found a difference between results of a same follwing formula: (I changed cells to numbers to simplify the problem.) in Excel: =0.6*2400*1.15*1170*1.1/100000 ---> result: 21.31272 In AutoLISP: (/(* 0.6 2400.0 1.15 1170.0 1.1) 100000.0) ---> result: 21.3127 While AutoLISP isn't as correct as Excel. Any help to get a result like Excel is appreciated.
2. ## AutoLisp For Area Calculation

Hi All, I need some help here. I'v been using a autolisp (obtained from a friend) to calculate floor area with AutoCAD 2007. However recently I've upgraded my AutoCAD to 2013 and I realised the lisp coudn't function completely. I've attached the lisp file here, really hope someone can help to rectify so that it works for AutoCAD 2013. Fyi I knows nothing about writting lisp code... many thanks in advance! (not sure why this code looks so massive compared to others..) To share with those who may be interested, this lisp allows you to select multiple polylines (eg. floor area), followed by select those polylines representing regions to be subtracted (eg. void area), it will help you tabulate all the polyline parcels (floor areas subtract floor void) with end result and with labels for each parcel. Enjoy! ATAB.lsp
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