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Convert Dwg To Pat File !exclusive! May 2026

Converting a file is not a direct "Save As" process because a

file is a plain-text definition of line vectors, not a standard drawing.

Here is how you can perform this conversion using different methods, depending on your tools and technical comfort. Method 1: The DXF & Online Converter Shortcut This is often the fastest way for simple geometry. Prepare Geometry : Open your

and ensure the pattern consists only of simple lines or polylines. Arcs and splines are generally not supported in

files and must be exploded or converted into straight segments. Move to Origin : Move your pattern base near the coordinate to avoid alignment issues. Export as DXF command and save the file as a convert dwg to pat file

: Upload your DXF to an online converter (like those found on YouTube tutorials ) to generate the Method 2: The "SuperHatch" Alternative (No .PAT Needed)

If you just want a custom pattern in your drawing without creating a standalone Express Tools Create a Block : Draw your pattern, use the command to name it, and set an insertion point. Run SuperHatch SUPERHATCH in the command line (available in the Express Tools Select Block : Choose the

option, select your pattern, and click inside the area you want to hatch.

Note: This creates a group of blocks rather than a standard hatch pattern. Method 3: Dedicated LISP Scripts and Utilities Converting a file is not a direct "Save

For users who need to generate actual hatch definition files regularly, third-party tools are more reliable: PatOut (LISP) : A free utility by Arkance (formerly CAD Studio) that extracts existing hatch definitions from a and saves them as

: An application that converts drawing entities (lines, points) directly into definitions. Hatch Pattern Generators : Tools like those on cadhatch.com

allow you to create patterns via Excel or web interfaces that export to Method 4: Manual Code Creation SAVING AUTOCAD DWG AS .PAT FILE - Forums, Autodesk 10 Dec 2020 —

What is a PAT File?

A PAT (Hatch Pattern) is a plain-text ASCII file. Every line of code defines a repeating tile or vector. A typical PAT line looks like this: *MyPattern, My custom description 45, 0,0, 0, 0.125, 0.1,-0.05 A single pattern definition (or multiple patterns separated

PAT files only store:

  • A single pattern definition (or multiple patterns separated by *).
  • Relative vector movements (angle, X-origin, Y-origin, offset, dash lengths).
  • No layers, no colors, no scale, no external references.

Feature Name: Dynamic Pattern Weaver

Method A: Using AutoCAD (Native Workflow)

Best for simple, geometric patterns.

  1. Clean the DWG: Delete all text, dimensions, and non-pattern geometry. Keep only 1 tile of the repeating pattern.
  2. Trim to Boundaries: Use BOUNDARY or TRIM to ensure lines stop exactly at the tile edge (e.g., a 1x1 unit square).
  3. Use SuperHatch (Indirect): While AutoCAD doesn't export DWG→PAT natively, you can use _SUPERHATCH to tile the DWG block, but for exporting, use Method B.

Method 2: Using Online Conversion Tools

  1. Go to an online conversion tool, such as Convertio or Online-Convert.
  2. Upload your DWG file to the website.
  3. Select "PAT" as the output file format.
  4. Click "Convert" to convert the DWG file to PAT.
  5. Download the converted PAT file.

Q1: Can I convert a DWG with 1,000 bricks into a PAT file?

A: No. A PAT file defines one brick (or one repeating unit). You must reduce your 1,000 bricks to a single brick with correct offsets. Then the PAT file repeats it 1,000 times during the hatch operation.

5. Sample PAT Code Generated from a DWG

If your DWG contained a simple brick pattern, the resulting PAT file would look like this:

*Brick_FromDWG, My converted brick pattern
; Generated from DWG geometry
0, 0,0, 0,4, 8,-8
90, 0,0, 8,8, 4,-4

Method C — Semi-automated via third-party tools or scripts

  • Search for utilities or LISP/AutoLISP scripts that convert geometry to PAT lines. Workflow:
    • Run script to sample tile geometry and output .pat text.
    • Validate and tweak the generated .pat in a text editor.
  • Examples of tools to search for: “DWG to PAT exporter”, “AutoCad pattern exporter”, AutoLISP pattern export scripts.