: .pat files are ASCII text files. You can technically edit them in Notepad or TextEdit, though the syntax for line angles and offsets is complex.
A PAT file is a pattern file used primarily in AutoCAD to define custom hatch patterns. Unlike a DXF, a PAT file is a plain text file that contains specific definitions describing how a pattern should be drawn within a closed area—including details like lines, angles, and spacing. These files are the key to applying textures to surfaces in any CAD project.
Convert simple line sets to PAT entries
: Since manual .pat creation is tedious, most users rely on specialized software:
: Use the DXFOUT command in your CAD software and save it as an older version (like AutoCAD 2000 DXF) for maximum compatibility with conversion tools. dxf to pat
Hatch patterns automatically adjust to different scales and boundaries.
Tired of manually writing coordinates for custom hatch patterns? Converting your DXF drawings directly to .PAT files is the ultimate time-saver for designers and architects. Unlike a DXF, a PAT file is a
def dxf_to_pat(dxf_path, tile_width, tile_height): doc = ezdxf.readfile(dxf_path) lines = [] for entity in doc.modelspace().query('LINE'): lines.append(((entity.dxf.start.x, entity.dxf.start.y), (entity.dxf.end.x, entity.dxf.end.y))) # Group by angle, compute families, generate PAT descriptors with open('output.pat', 'w') as f: f.write('*MyPattern, Converted from DXF\n') # Write descriptor lines...
If you are converting a custom drawing into a hatch pattern, follow these general steps: How to create custom Hatch Pattern - Forums, Autodesk Hatch patterns automatically adjust to different scales and
Before diving into the conversion process, it is important to understand how these two formats handle geometric data differently. What is a DXF File?