Catia-Kernel

Every SolidWorks user has opened a .SLDDRW file thousands of times. You place views, add dimensions, print to PDF, send it to the shop. But what’s actually inside that file? Is it vector graphics — maybe SVG behind the scenes? Is it a database of coordinates? How does a drawing “know” what the 3D model looks like from the front? We decompiled the SolidWorks interop DLLs, inspected exported symbols from native C++ libraries, and dug through the API documentation to answer these questions. Here’s what we found. ...

Every mechanical engineer who works with sheet metal in SolidWorks has clicked Export DXF/DWG hundreds of times. The flat pattern appears, a file lands on disk, and you send it to the laser cutter. But what actually happens between clicking that button and getting a flat DXF? Why is it slow? And why does the orientation sometimes feel random? We spent time digging into the SolidWorks API documentation, decompiling DLLs, and examining exported symbols to understand the full pipeline — the same approach we used when investigating how SolidWorks drawing files store geometry internally. Here’s what we found. ...