PartDesign SubtractivePrism

PartDesign SubtractivePrism
Menu location
Part Design → Subtractive Primitive → Subtractive Prism
Workbenches
PartDesign
Default shortcut
None
Introduced in version
0.17
See also
PartDesign AdditivePrism

Description

Inserts a subtractive prism in the active Body. Its shape is subtracted from the existing solid.

On the left: active body (A) shown in grey and subtractive prism (B) shown in transparent red; result on the right.

Usage

1. There are several ways to invoke the tool:
   • Press the Subtractive Prism button. Note: the Subtractive Prism is part of an icon menu labelled Subtractive Primitive. After launching FreeCAD, the Subtractive Box is the one displayed in the toolbar. To get the Prism, click on the down arrow besides the visible icon and select Subtractive Prism in the menu.
   • Select the Part Design → Subtractive Primitive → Subtractive Prism option from the menu.
2. Set the Primitive Parameters and Attachment.
3. Click OK.
4. A Prism feature appears under the active Body.

Options

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 Tree View, or by right-clicking and selecting Edit Primitive in the context menu; this brings up the Primitive Parameters.
• Via the Property View.

Operation

Sets the boolean operation used to combine the prism with the base solid. introduced in 26.3

• Subtraction (default): the prism removes its volume from the base solid, as in previous versions.
• Common: the prism keeps only the volume shared between itself and the base solid, discarding everything else.

Properties

• DataAttachment: defines the attachment mode as well as the Attachment Offset. See Part EditAttachment.
• DataOperation (Enumeration): sets the boolean operation used to combine the feature with the base solid (Subtraction, Common), see Options. introduced in 26.3
• 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.