This is a simple, plain-text file containing code that defines repeating line patterns. Hatch patterns do not store actual shapes; they store mathematical instructions (angle, origin-x, origin-y, delta-x, delta-y, dash, space) to infinitely repeat lines. Autodesk Community, Autodesk Forums, Autodesk Forum 2. Critical Geometrical Constraints
Draw your pattern close to the absolute coordinates origin (
Type HATCH , open the pattern library drop-down, and look under the tab to find your pattern. For Revit: Go to the Manage tab > Additional Settings > Fill Patterns . Click New , select Custom , and click Browse . Select your .pat file.
: The resulting PAT file is then placed into the software's Support folder (e.g., in AutoCAD's AppData directory ) [13, 16]. Once the software is restarted or the path is refreshed, the custom design appears as a "User Defined" hatch [16, 20]. Alternative: PAT to DXF dxf to pat
Developed by Autodesk, DXF is a tagged data representation of a vector drawing. It translates entities like lines, arcs, circles, and polylines into explicit coordinate points ( ) so different CAD software packages can read the file.
Scripts like GetPat or DrawPat allow users to draw a pattern in CAD, export it as DXF, and instantly generate a PAT file. 2. Standalone Converters
In the world of computer-aided design (CAD), the journey from a (Drawing Exchange Format) to a PAT (Pattern) file is the story of turning a flat drawing into a repeating texture. The Problem: The Infinite Wall This is a simple, plain-text file containing code
Upload your cleaned DXF file to a trusted online file conversion site. Select as the target output format.
Several web-based CAD tool projects allow you to upload a small DXF file and download a processed PAT file. If you use online converters, ensure your DXF file contains nothing but clean, un-grouped lines to avoid processing errors. Method 3: Manual Coding (For Simple Patterns)
Even with good software, DXF to PAT conversion can fail. Here is a troubleshooting checklist. Critical Geometrical Constraints Draw your pattern close to
Header: *BRICK50X100, Brick pattern 50x100 units
Remove overlapping lines and unnecessary layers to avoid a bloated file. 2. Export to DXF
Converting (Drawing Exchange Format) to PAT (Hatch Pattern) is a common workflow for CAD designers who want to turn custom vector drawings into repeatable hatch patterns. While CAD software like AutoCAD can read both, a .pat file specifically defines the repeating geometry used for "fills" in drawings. Core Conversion Workflow