Deforming Geometry by Moving CV along a Normal

Purpose

Deforms surfaces or trimmed surfaces by moving their CVs in a normal (perpendicular) or tangential direction.

Use this tool to achieve some interesting twist effects, or to slide a row of CVs along a surface.

How to Use

1

Select Xform > Modify > Move CV normal , or click its icon. The system prompts:

Select surface or polyset CVs by holding shift key down and using mouse.

As with the other Xform tools, clicking on a CV will select that CV. To select multiple CVs, hold down the Shift key.

2

Select one or more CVs. You can also click on a hull line to select an entire row of CVs at once. The system prompts:

Left mouse button - move along normal; Middle - along U direction; Right - along V direction.

3

Move the active CVs along the normal (i.e. the normal at the point on the surface closest to each CV), in the U direction, or in the V direction.

• To move the CV along the normal and back again, use the left mouse button.

• To move the CV along a U curve of the surface, use the middle mouse button. (The CV's height is kept.)

• To move the CV along a V curve of the surface, use the right mouse button. (The CV's height is kept.)

• Use the keyboard to enter values (in ABS or REL mode) for the displacements in the N, U and V directions.

Move CV Normal Options

To make delicate changes to curves or surfaces, Select Xform > Modify > Move CV normal- to open the options window, and decrease the Mouse sensitivity value for finer mouse movements.

See also

• Moving Objects on page 176