Extract Boundary Curves

Extract Boundary Curves

File: Part_Document_Scripts/Extract_Boundary_Curves.py
Version: 1.1
Document Type: Part (also works with Part inside Product or Process)

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Description

Extracts the boundary of a selected surface as an explicit datum curve using tangent propagation. The user selects the surface and then an edge on it to define the starting point for the boundary extraction.

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Requirements

Requirement	Value
Python	>= 3.10
pycatia	>= 0.8.3
wxPython	Not required
Open document	Part, or Part inside Product/Process

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Usage

1. Open a CATPart document containing a surface
2. Run the script
3. Selection 1: Select the surface to extract the boundary from
4. Selection 2: Select an edge on the surface to define the boundary start point
5. The boundary curve is created as a datum in the current in-work geometric set

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Output

• Result is named Boundary_Extract.N where N is an incrementing number
• Result is a datum (isolated) — no parametric link to the source surface
• If the in-work object is not a geometric set, a new one named Boundary_Extract is created

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Notes

• Uses tangent propagation (type 2) — the boundary will follow the surface boundary by tangency from the selected edge
• The selected edge must lie on the selected surface