• Tool >> Subdivide Shell / Region command subdivides the faces of a shell or selected region, and improves the curvature continuity between adjacent faces.

• Each face is subdivided into three or four triangles by adding new vertices on each of its edges or at centroid ; not only the position of new vertices, but also the position of original vertex are recalculated, thus the curvature continuity is much improved. You can select 3x if you want to produce three new triangles and 4x if you want four.
• By doing this, the overall shape becomes more conspicuous and clearer.
• Tool >> Subdivide Shell / Region command can be applied to both a selected shell and a selected region. The menu automatically changes to Tool >> Subdivide Region when a region, namely a group of faces, is selected. Otherwise, it reads Tool >> Subdivide Shell.

Step

Execute Tool >> Subdivide command as follows:

1. When there is no selected region, the menu appears as Tool >> Subdivide Shell. In this case, it is applied to a whole shell. When there is a selected region, the menu appears as Tool >> Subdivide Region, and it is applied only to a selected region.

2. Select Tool >> Subdivide Shell / Region or, click the corresponding icon from the polygon Tool1 toolbar.

3. In cases of Tool >> Subdivide Shell, select a shell; in case of Tool >> Subdivide Region,  no selection is needed cause there already is a pre-selected region. Then the following dialog box comes out. ( See Select Shell )

The default option 4x produces four triangles for every original triangle. Select 3x to produce three triangles for every original triangle.

Edges with length values bigger than the value in If the length is greater than field is subdivided. To subdivide all the faces, set the value to 0.0.

The Preserve Sharp Edges option determines whether or not to preserve the sharp corners of the selected shell or region.

The Preserve Marked Edges / Vertices option determines whether or not to preserve the marked edges or vertices.

Click Do not adjust vertex position option in order not to move original and new vertices.

Click Subdivide by curvature option to subdivide only high or low curvature region. High curvature region is displayed with red and blue color by Measure > Curvature Plot operation. You can expand the low curvature region by typing in a number bigger than 1.0(default).

5. Press OK button to complete this command.

• Do not adjust vertex position option is unselected by default. In this case, smoother surface can be produced by adjusting the position of vertices to better accommodate the subdivision of triangles.

Note

• This command is texture preserve command. So if user don't have Color workbench license, Rapidform shows a below message.

If user select OK, texture will be removed after execution, If Cancel, execution will be canceled.