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Modify Faces of 3D Solids

May 20, 2011

        You can modify faces of 3D solids through extruding, moving, rotating, offsetting, tapering, delete, copying or changing the color of the selected faces.


Extrude Faces

       You can extrude one or more faces of 3D solids at the specified height and path.

        Negative value extrudes faces along to the positive normal; positive value extrudes faces along to the negative normal. After specifying the height, the system prompts you to specify the angle of taper for extrusion. If you specify the angular value is greater than 0, the plane tapers in from the base object; if the value is negative, the face tapers out. By default, the value is of 0, which extrudes the face perpendicular. The extrusion stops when the tapered face shrinks into a point.

        If you select Path option, the selected face extrudes at the specified line or curve objects. The objects that can be specified as a extrusion path contains line, circle, arc, ellipse, ellipse arc, polyline and spline. These objects should not be coplanar with the object, nor should have areas of high curvature. Generally, one of endpoints of the selected extrusion path should lie on the center of the face to extrude, if not, the system will do it.


To extrude a solid face

  1. Choose Modify > Solids Editing > Extrude Faces.

  2. Select the face(s) to extrude, and press Enter.

  3. Do one of the following:

  • Specify the height of extrusion.

  • Type p and press Enter to select a path for extrusion.

  1. If you specified a height, specify a taper angle.

Solids Editing toolbar\

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Select the entity to extrude, and then specify the face(s) to extrude (A), and the height of extrusion or path The resulting entity with the face extruded to position (B)

Move Faces

        Moves face of a 3D solid at the specified distance. This command only changes the location of the face, leaving the direction unchanged. Using object snap help you specify the location exactly.


To move a solid face

  1. Choose Modify > Solids Editing > Move Faces.

  2. Select the face(s) to move, and press Enter.

  3. Specify a base point.

  4. Specify an end point.

Solids Editing toolbar\

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Specify the face(s) to move(A), the base point (B),and the end point (C) The resulting object with the face moved to the new position

Offset Faces

       You can scale faces of 3D solids with the specified offset. Positive value enlarges objects; negative value shrinks objects. For example, you can enlarge or shrinks an aperture using offset. In addition to entering distance, you can also drag the cursor to determine the distance.


To offset a solid face

  1. Choose Modify > Solids Editing > Offset Faces.

  2. Select the face(s) to offset, and press Enter.

  3. Specify an offset distance.

Solids Editing toolbar\

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Specify the face(s) to offset (A) and the distance to offset The resulting object with the face offset to position (B)

Delete Faces

    You can use SOLIDEDIT to delete the selected faces or fillets of 3D solids.


To delete a solid face

  1. Choose Modify > Solids Editing > Delete Face.

  2. Select the face(s) to delete, and press Enter.

Solids Editing toolbar\

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Specify the face(s) to delete (A) The resulting entity with the face deleted

Rotate Faces

       You can use SOLIDEDIT to rotate the selected face of the specified 3D solid around a rotation axis. You can specify two points on the drawing or select a existing line as the rotation axis. X, Y or Z axis as well as the Z direction of the current view could be used as the rotation axis too.

      The system rotates faces at the specified angle on the current UCS, which the angle direction is stored in the system variable ANGDIR.


To rotate a solid face

  1. Choose Modify > Solids Editing > Rotate Faces.

  2. Select the face(s) to rotate, and press Enter.

  3. Specify a base point.

  4. Specify another point on the rotation axis.

  5. Specify the rotation angle.

Solids Editing toolbar\

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Specify the face(s) to rotate (A), the base point (B),a second point on tapered the rotation axis (C), and a rotation angle. The resulting object with the face to position (D)

Taper Faces

        You can taper the selected face at the specified angle around a base line. The rotation direction depends on the sequence of specifying the base point.

      Positive angle tapers faces in and negative angle tapers faces out. The angle should not be too large in order to the tapered face shrinks into a point before reaching the specified height.


To taper a solid face

  1. Choose Modify > Solids Editing > Taper Faces.

  2. Select the face(s) to taper, and press Enter.

  3. Specify a base point.

  4. Specify another point along the axis.

  5. Specify a taper angle.

Solids Editing toolbar\

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Specify the face(s) to taper (A), a base point(B), a second point along the taper axis(C), and a taper angle The resulting entity with the face tapered to position(D)

Color Faces

       You can assign color to the faces of 3D solids. The specified color of faces overwrites the color of the layer on which the faces drawn.


To color a face

  1. Choose Modify > Solids Editing > Color Face.

  2. Select the face(s) to color, and press Enter.

  3. Specify a color.

Solids Editing toolbar\

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Specify the face(s) to color (A) The resulting entity with the face colored

Copy Faces

   You can copy faces of 3D solids to the specified location. The selected faces are seen as an independent region or solid object. After creating copies, you can perform one of the following methods:

  • Base point: You must to specify two points on the drawing. The first one is a base point; the other one determines the location of the copy.

  • Vector: You need to specify a point to determine the location of the copy. The base point is the original point (0,0,0).


To copy a solid face

  1. Choose Modify > Solids Editing > Copy Faces.

  2. Select the face(s) to copy, and press Enter.

  3. Specify a base point.

  4. Specify an end point.

Solids Editing toolbar\

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Specify the face(s) to copy (A), the base point (B), and the end point(C) The resulting entity with the face copied

Commands Reference

SOLIDEDIT: Edits faces and edges of 3D solid objects

EXTRUDE: Creates unique solid primitives by extruding existing two-dimensional objects

System Variables Reference

ANGDIR: Sets the direction of positive angles 

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