File: Part_Document_Scripts/Create_Spline_From_Coordinates.py
Version: 1.0
Document Type: Part

Creates a GSD point set and spline in the active CATPart from arbitrary X Y (or X Y Z) coordinates. Coordinates can be loaded from a .dat, .csv, or .txt file, or pasted directly into a text area in the dialog. Non-numeric header lines and lines beginning with # are silently skipped.

The script creates a geometric set (user-named) containing:

• A Points sub-set with all input points
• A GSD spline (Spline) through all points — open or closed at the user's option

A uniform scale factor can be applied to convert between coordinate units. Settings are persisted between runs.

1. Open a CATPart document
2. Run the script
3. Choose input mode (File or Paste Text) and supply your coordinates
4. Set the geometric set name, scale factor, close option, and output plane
5. Click OK — a progress bar shows while geometry is created
6. A new geometric set is added to the part containing the point set and spline

Click Browse to select a coordinate file. Supported formats:

Lines beginning with # are treated as comments and skipped. Any line that cannot be parsed as numbers is silently ignored, so header rows require no special handling.

Switch to Paste Text mode and type or paste coordinates directly into the text area. Each line should contain one point:

10.5 0.0
20.3 5.2
35.0 8.1

Columns may be separated by spaces, tabs, or commas.

A uniform multiplier applied to all coordinate values:

Connects the last point back to the first point to form a closed loop.

• Enable for closed profiles (airfoil cross-sections, pipe profiles, cam lobes)
• Disable for open curves (path guides, camber lines, boundary curves)

Determines which 3-D plane the 2-D (X Y) input is placed on:

If 3-column (X Y Z) input is supplied, this setting is ignored.

A geometric set named as specified is created at the top level of the part tree:

<Geometric Set Name>
├── Points
│ ├── Point_001
│ ├── Point_002
│ │ ...
│ └── Point_NNN
└── Spline (open or closed)

All settings except the raw coordinate data are saved automatically to:

%APPDATA%\pycatia_scripts\Create_Spline_From_Coordinates\user_presets.json

The next time the script runs, your last-used values are pre-filled in the dialog.

• At least 3 valid coordinate pairs are required to create a spline
• If 3-D (X Y Z) coordinates are detected in any row, the plane selection is ignored for all rows
• The geometric set can be renamed in the CATIA tree after generation