9

Stretch Modifier 837
Parameters rollout
Use options in the Parameters rollout to set the
following:
•Amountofstretch
•Majorstretchaxis
• Area affected by the stretch
Stretch group
The Stretch group of the Parameters rollout has
two fields that control the a mount of stretch
scaling applied.
Stretch—Setsthebasescalefactorforallthreeaxes.
The scale factor derived from the Stretch value
varies according to the sign of the value.
• Positive stretch values define a scale factor
equal to Stretch+1. For example, a st retch va lue
of 1.5 yields a scale fac tor of 1.5+1=2.5, or 250
percent.
• Negative stretch values define a sca le factor
equal to -1/(Stretch-1). For example, a
stretch value of -1.5 yields a scale factor of
-1/(-1.5-1)=0.4, or 40 p ercent.
The calculated scale factor is applied to the
selected stretch axis and the inverse scale is
applied to the minor axes.
Stretch values of 0.0, 0.5, and -0.5
Amplify—Changes t he scale factor applied to the
minor axes. Amplify generates a multiplier using
thesametechniqueasstretch.Themultiplieris
then applied to the Stretch value before the scale
factorfortheminoraxesiscalculated.
Amplify values affect scaling along the minor axes
in the following way:
• A value of 0 has no effect. It us es the default
scale factor calculated from the Stretch amount.
• Positive values exaggerate the eff ect.
• Negative values reduce the effect.
Stretched objects with Amplify values of 0.0, 1.0, and -1.0.
Stretch Axis group
You select which of the object’s loca l axes is the
Stretch Axis using options in the Stretch Axis
group of the Parameters rollout.