Force Clockwise

Normalizes the vertex winding order of all polygons to clockwise.

When to Use

• When target formats require a specific winding order
• Before boolean operations that depend on consistent winding
• To fix polygons with mixed winding orders from import

Options

Option	Description	Default
Direction	Clockwise or Counter-clockwise	Clockwise
Selected layers only	Apply to selected layers instead of all	Off

How It Works

For each polygon, the tool calculates the signed area:

• Positive signed area = counter-clockwise winding
• Negative signed area = clockwise winding

Polygons with the wrong winding order have their vertex sequence reversed.

Technical Notes

• Winding order determines which side of a polygon is "inside" in some formats
• GDSII convention is clockwise for outer boundaries
• This operation does not change the visual appearance of the geometry