Extruding a 3D surface

Tools: Extrude

To create a 3D solid based on a 3D surface

• You have already created the 3D surface.
• Select 3 Viewports.

1. Click Extrude (How).
   

   Activate Extrude in one of the following ways

   • Actionbar:Role Draft Task Modeling Task area 3D Objects

   • Menu bar: Create Bonus Tools 3D Modeling

   • Palette: Tools Create area in the following module(s):

   3D Modeling

2. Using the context toolbar, you can specify how the extruded solid behaves:
   • Always add solid is not active (default setting): if the extruded solid intersects or penetrates an existing solid, the extruded solid will be subtracted. If this is not so, the extruded solid will be added.
   • Always add solid is active: the extruded solid is always added.
   • New element is active: the extruded solid is always created as a new element.

     Example

     Note: The preview shows how an extruded solid behaves: red solids are subtracted; green ones added.
     New elements are displayed in the current line color; they do not change any existing elements.

3. Click Extrude Surface on the Extrude Context toolbar.

   Tip: When you point to the surface, Allplan highlights it with a fill in detection color.

4. Click in the surface you want to extrude.
   You can select exterior surfaces of 3D solids and any 3D surfaces.

   Note: The program automatically detects 3D surfaces and selects Extrude Surface on the context toolbar.

5. To extrude the surface, move the crosshairs into the required direction and click the end point. Use the viewport with the view that works best for you.

   Or

   Enter the Length in the dialog line and select the Enter key to confirm.
   The value applies to the selected surface.

   Note: The Length must not be less than 1 mm.

   Note: The extrusion path is always perpendicular to the reference surface.

   Allplan creates the extruded solid.

   Note: When you use polygonal elements as initial elements, Allplan creates polygonal 3D objects if this is possible. When you use initial elements with curves, Allplan creates general 3D objects (BREPs, NURBS).