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Line

MixedCurve

Curves

Description

The Curves EditableSpline tool creates a freehand B-spline curve.

Usage

1. Optionally select vertices, edges and/or faces:
   • The number of the spline vertices will match the number of selected elements.
   • The spline vertices will snap to the selected vertices, and to the midpoints of the selected edges and faces.
2. There are several ways to invoke the tool:
   • Press the Freehand BSpline button.
   • Select the Curves → Freehand BSpline option from the menu.
3. A Freehand_BSpline object is created and set in a special edit mode.
4. Drag the spline into the desired shape. See options below for details
5. Press Q, or right-click the spline in the Tree view and select the Finish editing option in the context menu to exit the edit mode and finish the command.

Options

During the command a special edit mode is active and there are several actions and behaviors that can be controlled by keys and mouse clicks.

• To move a vertex or guide line (guide lines are the straight lines between vertexes) press and hold down the left mouse button on it, and move the mouse.
• The A key selects or deselects all vertexes and guide lines.
• The I key will add a vertex to the segment belonging to the selected guide line. The new vertex will be selected.
• The T key sets or un-sets tangent mode for the selected vertexes or guide lines (relative to the view direction).
• The P key aligns selected objects.
• The S key can be used to snap a vertex to a vertex belonging to another B-spline. With a vertex of the B-spline being edited selected, hold down the Ctrl key and add the target vertex to the selection, then hit the S key. The vertexes are snapped together.
• To unsnap vertexes, select the snapped vertex pair and again hit the S key. The vertex of the B-spline being edited remains selected and can now be moved.
• The L key sets or un-sets the linear interpolation.
• The X, Y or Z keys can be used to constrain the movement of the object being dragged. While dragging, hit the desired axis key. Hit the same key again to disable the constraint.
• The Q key finishes the command and exits edit mode.

Properties

See also: Property editor.

A Freehand_BSpline object is derived from a Part Feature object and inherits all its properties. It also has the following additional properties:

Data

Profile

• DataData (VectorList): Data list.
• DataData Type (IntegerList): Types of interpolated points.
• DataFlags (BoolList): Tangent flags.
• DataLinear Segments (BoolList): Linear segment flags.
• DataParametrization (FloatConstraint): Parametrization factor.
• DataPeriodic (Bool): Periodic curve.
• DataSupport (LinkSubList): Constraint shapes.
• DataTangents (VectorList): Tangents list.
• DataTolerance (Float): Tolerance.

Scripting

Line

MixedCurve

Curves