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Few days after the fantastic Bricsys conference in Munich, Bricsys releases the new version of its flag-ship design software BricsCAD.

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Several new featureas are available in the new version.

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During the Christmas holidays I decided to practice my (indeed very poor) F# skills. The end of the year usually gives me that little bit of extra time mixed with boringness and nostalgia to start thinking about completely useless stuff. This year I revamped an old piece of code I wrote in autolisp more than ten years ago to find intersections of a set of 2D line segments in AutoCAD. At that time, without the help of C++, was very hard to have good performances mixing pure autolisp and bad coding. Since it was not possible to speed up autolisp you had to opt for good structures, algorithms, and clean coding. F# is a first class choice for computational geometry programming, so I rewrote the original code in F# for AutoCAD.
AutoCAD Lines
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A special thanks to our colleague from Atree, Alberto Strazzabosco for providing this really handy compatibility map available for AutoCAD and Inventor. In case you are not sure your new AutoCAD/Inventor works ok on your operating system have a look at the following maps.
Just a side note:  "No" means the software is not officially supported by the Autodesk network. Install at your own risk.
 
 
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In my previous post I explained how to hack the DWG file format to get the DWG file version. As promised, the second part of the post provides the code. Anyway, I changed my mind. Just to make the thing more interesting I decided to publish an F# version of the code.
F# is the last entry into the official Microsoft Languages family. It's a functional language, targeted at the .NET framework. If you are new to the language there are several language specific features that make the code succinct and very elegant (to me at least). An example for all is the pattern matching.
Here is the code.

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AutoCAD allows you to add standard and custom properties to your DWG files so that you can easily browse the properties from the Windows shell. In this post I want to show you how to read the DWG file properties. 

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These properties may be useful in case you need to get some info from your file but you don’t have AutoCAD available (or just don’t want to run AutoCAD to get the info). Autodesk provides a DLL COM server called DwgPropsX.DLL that you can use to get the same info, but in this case… where is the fun?

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