DmExtrude

Commands

DMEXTRUDE

About

The Extrude tool allows you to create 3D solid(s) by extruding closed 2D entities, faces of 3D solid(s), regions or closed boundaries. The Extrude tool enables you to cut the solid model partially by removing the volume from the main solid and it can also create new solid(s) by adding volume to the main solid model.


For more information about this command, visit the Command Reference article DMEXTRUDE.

The following illustration shows the selected entities to be extruded.

Closed entities (1) (2) are shown. A region object (3) is shown in the figure.
The following illustration shows a closed boundary in the XY-plane of the current coordinate system (4) and the closed boundary on the face of the solid (5) is highlighted while hovering over it.
The closed boundaries are recognized automatically in BricsCAD, when the Enable Boundary Detection option on the Selection modes toolbar is active.
Note: As a closed entity only closed polylines, circles, and ellipses are accepted.

Procedure: using DMEXTRUDE in solid mode

The following are general steps to add and remove volume from the solid(s) using the Extrude tool.
  1. Hover the cursor over an entity or sub-entity in the drawing area.
  2. Select the Extrude tool in the Model tab from the Quad.

    You are prompted: Specify height of extrusion or set [Auto(subtract or create)/Create/Subtract/Unite/Both sides/Taper angle/Direction/Limit] <Auto>.

  3. The “DmExtrude Hotkey Assistant” appears at the bottom of the screen with a set of extrusion options.
    Note: The default mode is indicated by a blue frame.


    • Auto (6): The result of the auto option depends on the extrusion direction of the 3D solid and the value of the DMEXTRUDEMODE system variable value. Note: By default, the value of the DMEXTRUDEMODE is set to “3”. The following illustration shows the extruded entity from the main solid while the default value is set to “3”. When you highlight an entity (10) and extrude it to the outward (11), a new volume is added (12) to the main solid model.


      The following illustration shows the subtracted entity from the main solid. When you highlight an entity (13) and extrude it to the inward (14), a volume is subtracted (15) from the main solid.



    • Create (7): Regardless of the extrusion direction, a new volume is created (16) from the existing solid.
    • Subtract (8): The 3D solid is subtracted from each interfering existing solid.

      The following illustration shows the subtracted solids (18,19) using the highlighted boundary (17).

    • Unite (9): The new volume is unified with each interfering existing solid.

      The following illustration shows the before and after when using the extrusion tool unite option. The solid surface is highlighted (20) and the distance between the left and right face is shown with the aligned line (21). The new volume is unified (22) with the first solid.

    • Both sides: New symmetric volumes are created (23), (24) in both directions from the main solid.
    To create symmetric volumes from the existing solid, type “B” on the the Command line which corresponds to Both sides option of the Extrusion tool.
    • Select one of the available options to operate the extrusion function on your solid.
    • Next, move the cursor in the desired direction to specify the extrusion direction. The selected entity or sub-entity is extruded dynamically.
    • Define the height of extrusion by specifying a point in the drawing, entering a value in the dynamic dimension field or choose the limit option.
    • Press Enter or right-click to accept the extrusion from your existing solid.

DMEXTRUDE in Surface Mode

The extrude tool allows you to create 3D surface(s) by extruding 2D entities such as lines or polylines.


For more information about this command, visit the Command Reference article DMEXTRUDE.

Procedure: using the extrude tool in surface mode

The following are general steps to create 3D surface(s) using the Extrude tool in the Surface mode.
  1. Move the cursor over an entity or sub-entity in the drawing area.
  2. Select the Surface Extrude tool in the Model tab from the Quad.

    You are prompted: Specify height of extrusion or set [Auto(subtract or create)/Create/Subtract/Unite/Both sides/Taper angle/Direction/Limit] <Auto>.

  3. The “DM Extrude Surface Hotkey Assistant” appears at the bottom of the screen with a set of surface extrusion options.


    Note: The default mode is indicated by a blue frame.
    • Auto (25):Select either a surface or the face of a solid element. When the surface’s edge is used as a contour for extrusion, the created surface is stitched with the base surface. When the surface’s face is used for extrusion, the surface results in not stitched with the base surface.
    • Create (26):Create new surfaces.
    • Slice (27):Cut through solids with the extruded surface. This option is much like the SLICE command.
  4. Select one of the options and move the mouse to give the extrusion direction, entering a value in the dynamic dimension field.
  5. Press Enter or right-click to accept the extrusion for the surface.
    The following illustrations show the created surface (29) by extruding the selected 2D entity (28) in the drawing.