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Waterline Curves

In one sentence: Generates horizontal cross-section contours (waterlines) on a surface or solid at a series of Z heights.

Third-party addon — installation required

The Curves workbench is not included in FreeCAD. Install it via Tools → Addon Manager → search "Curves" → Install and restart FreeCAD.

Overview

Workbench: Curves
Menu: Surfaces → Waterline Curves
Command: Curves_WaterlineCurves

Each waterline is the intersection of a horizontal plane with the shape at a given Z height. The result is a set of edges tracing these intersections.

Parameters

Parameter Description
Number of levels How many horizontal cross-sections to generate
Z min / Z max Height range
Step Spacing between levels (alternative to count)

Common uses

  • Visualising 3-D hull or terrain shapes as 2-D contours
  • Generating level curves for milling toolpaths
  • Checking a shape's cross-sectional profile at multiple heights

See also