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Customizing Vertex Assignments 1089
Envelope cross sections can be scaled and moved.
Using Control Points
By default, each cross section consists of four
control points. You can use these control points
to alter the shape of a single cross section. The
control points define the shape (perimeter) of
the section. Moving one point affects the shape
between itself and its neighbors on each side.
Rota ting a nd S cali ng
Control points are internally positioned using
cylindrical coordinates, that is a distance from
thelinkatsomeanglearoundthelink.Tomove
a control point, you must scale it to the corr ect
distance from the link and then rotate it into the
orientation you desire. The move tool actually
serves the dual function of rotating a nd scaling at
the s ame time.
By moving a control point the envelope is also scaled.
See also
Envelope Sub-Object (page 2–1130)
Customizing Ver tex Assignments
Use V ertex sub-object controls to:
• Override vertex-link assignments currently in
effect.
• Change the blend ing type and weight.
• Assign vert ices to their links yourself, by p assing
Physiq ue’s envelope method for vertex-link
assignment.
You might want to reassign link assignments
in effect about adjacent fingers, for example,
even after working to reshape envelope size and
position. You ma y find that you need greater
control in areas where adjacent envelopes overlap: