Splines

A spline is a smooth curve that is composed from a series of points (called spline points).

In 3D-CAD, splines must be composed of at least two points. Typically most splines contain three or more points.

Each point on a spline has additional properties that define the angle and curvature of the spline passing through the point. You can modify these properties using splines handles that appear when you select a spline.

A list of topics that cover more advanced features of splines is provided below:

Placing Splines on Existing Points

When you place a spline point on an existing point in the sketch, 3D-CAD assumes that it is the end of the spline, and exits the spline creation tool.

If you want to carry on adding spline points after passing through an existing point, press and hold the <Ctrl> key before clicking the existing point. This action allows you to create splines that pass through existing points in the sketch.

The spline point is placed on top of the existing point. To connect the two points, apply a coincidence constraint.

Note Do not split splines using the Split for Trim operation. Doing so modifies the spline curvature.

Adding and Removing Points on a Spline

You can edit splines by selecting individual spline points and modifying them using the same technique as for points. You can also add and remove points from a spline.

To add a point to a spline:
  • Click the (Create point) button, and click on the desired location on the spline.

You can modify this new point in the same manner as any other point on the spline.

To remove a spline point:
  • Right-click the point and select Delete, or select the point and press the <Delete> key.

The spline redraws based on the remaining spline points.