Convert — Dwg To Pat File Patched
If your DWG already contains the hatch you want to save, use a LISP routine to extract the definition.
If you already have a hatch pattern inside a DWG but lost the original PAT file, you can recreate the boundary geometry using native tools: Select the existing hatch in your viewport. Right-click and select .
No reliable online converter exists. PAT files require precise math, and web-based DWG parsers are insecure and inaccurate. Avoid "free online converters" asking for uploads—they often steal CAD data.
If you have drawn a custom shape (like a specific tile layout) and want to turn it into a reusable hatch, follow these steps:
Convert that geometry into a Block using the BLOCK command. Step 3: Type SUPERHATCH in the command line. convert dwg to pat file
Express Tool. This allows you to use an Image, Block, or Xref as a repeating pattern. Autodesk Community, Autodesk Forums, Autodesk Forum Installation Once you have your file, move it to the AutoCAD support path (typically
A dialog box will appear. Select if you have saved your custom pattern linework as a local block. Select the desired block from the list.
Before converting, your DWG geometry must be perfect. The converter (script or tool) can only read lines.
Click the bottom-left corner origin ( 0,0 ), and then click the top-right corner to establish the pattern's repeating width and height grid. If your DWG already contains the hatch you
Start the file with an asterisk followed by the pattern name, and an optional description: *MyCustomPattern, Description of pattern
A successful conversion depends entirely on how you prepare your linework in the DWG file. If your geometry is messy, the resulting hatch pattern will break, overlap, or fail to load. Follow these strict rules before using any conversion tool:
In the Hatch creation ribbon, click the Pattern drop-down menu and select Custom .
A plain text file used by AutoCAD and Revit to store hatch pattern definitions. Instead of visual geometry, a PAT file contains lines of code, coordinates, angles, and spacing rules that dictate how a pattern repeats infinitely. No reliable online converter exists
In the world of computer-aided design (CAD), the need to convert a file, which is AutoCAD's native drawing format, into a PAT file, which stores custom hatch patterns, is a common but often misunderstood task. While many users search for a straightforward “Save As” option, the process is more nuanced. This guide clarifies what PAT files are, debunks conversion myths, and provides a comprehensive overview of the most effective methods and tools for creating PAT files from your DWG drawings.
If you have raw geometry (lines) instead of an existing hatch, you can use a converter. Simplify Geometry
can automate this. You simply load the script into AutoCAD, select the hatch, and it generates the PAT definition for you. The Revit Export "Trick":