Sketch.spline()

The Sketch.spline() method in CadQuery is used to create a spline curve in a 2D sketch.

Syntax

Sketch.spline(control_points, degree=None)

Parameters

• control_points (list): List of points that define the spline curve. Each point should be a tuple of x, y coordinates.
• degree (int, optional): Degree of the spline curve. Defaults to None, which indicates an automatic curve degree selection.

Return Value

The Sketch.spline() method returns a Wire object that represents the spline curve.

Examples

Here is an example usage of Sketch.spline() to create a spline curve:

import cadquery as cq

# Create a new 2D sketch in the XY plane
sketch = cq.Workplane("XY").newSketch()

# Define the control points for the spline curve
control_points = [(0, 0), (1, 1), (2, 0), (3, -1), (4, 0)]

# Create the spline curve
spline_wire = sketch.spline(control_points)

# Extrude the spline curve to create a solid shape
solid = sketch.extrude(1.0)

In this example, we first create a new sketch in the XY plane using cq.Workplane("XY").newSketch(). We then define a list of control points to describe our desired spline curve.

Next, we call sketch.spline(control_points) to create the spline curve in our sketch. The spline() method returns a Wire object that represents the curve.

Finally, we extrude the sketch into a 3D shape using sketch.extrude(1.0).

Notes

• The control_points parameter for Sketch.spline() should contain at least 3 points to define a non-degenerate spline curve.
• For best results, the control points should be evenly spaced along the desired curve.
• If degree is set to None, CadQuery will automatically select a degree for the spline curve based on the number of control points. However, manual selection of the curve degree may result in better results for certain types of curves.