PartDesign AdditivePrism

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



How to use

 * 1) Press the  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. TODO: add Attachment page (Part_Attachment? PartDesign_Attachment?) and link to it here
 * 3) Click.
 * 4) A Prism feature appears under the active Body.

Options
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.

Properties
To be added