Silk CubicCurve 4

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ControlPoly4

Point_onCurve

Silk

Description

The Silk CubicCurve 4 command creates a parametric Bezier cubic curve, a CubicCurve_4 object, from a ControlPoly4 or ControlPoly4_segment object.

A 3D Bezier curve built from a ControlPoly4_2N object

This command is the last of three steps to create a parametric Bezier cubic curve:

1. Create one or two Sketches
2. Create a Silk ControlPoly4
3. Create a Silk CubicCurve_4

Sketch → Control polygon → Resulting Bezier curve

Usage

1. There are several options for a preselection:
   • Select one ControlPoly4 in the Tree View or in the 3D View.
   • Select one ControlPoly4_segment in the Tree View or in the 3D View.
2. There are several ways to invoke the tool.
   • Press the CubicCurve_4 button.
   • Select the Silk → CubicCurve_4 option from the menu.
3. A CubicCurve_4 object is created.
4. Optionally adjust parameters in the Property View.

Properties

See also: Property View.

A CubicCurve_4 is derived from a ..., formally a yyy object and inherits all its properties. It also has the following additional properties:

Data

C1 - Inputs

• DataPoly (Link): Control polygon.
• Datareverse (Bool): Default is False. Reverses the parameter direction.

C3 - Identifiers

• DatainternalName (String): The permanent internal FreeCAD name for this object.
• Dataobject_type (String): Default is CubicCurve_4. The workbench class used to create this object.
• Dataobject_version (String): The class version of this object.

ControlPoly4

Point_onCurve

Silk