PartDesign AdditivePrism

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PartDesign AdditivePrism

Menu location
Part Design → Create an additive primitive → Additive Prism
Default shortcut
Introduced in version
See also
PartDesign CompPrimitiveAdditive, PartDesign SubtractivePrism


Inserts a primitive prism in the active Body as the first feature, or fuses it to the existing feature(s).


  1. Press the Additive Prism button. Note: the Additive Prism is part of an icon menu labelled Create an additive primitive. After launching FreeCAD, the Additive Box is the one displayed in the toolbar. To get the Prism, click on the down arrow besides the visible icon and select Additive Prism in the menu.
  2. Set the Primitive parameters and Attachment.
  3. Click OK.
  4. A Prism feature appears under the active Body.


It is possible to create skewed prisms by specifying angles in respect to the normal vector of the chosen attachment.

The Prism can be edited after its creation in two ways:

  • Double-clicking it in the Model tree, or by right-clicking and selecting Edit primitive in the contextual menu; this brings up the Primitive parameters.
  • Via the Property editor.


  • DataAttachment: defines the attachment mode as well as the Attachment Offset. See Part EditAttachment.
  • DataLabel: label given to the Prism object. Change to suit your needs.
  • DataPolygon: number of sides in the polygon cross-section of the prism.
  • DataCircumradius: circumscribed radius of the polygon cross-section of the prism.
  • DataHeight: height of the prism.
  • DataFirst Angle: angle in first direction.
  • DataSecond Angle: angle in second direction.