9

Pelt Map Parameters Dialog 911
the straight line. Continue moving vertices to
create a polygonal outline; to quit, click Straighten
Stretcher again.
Note: While Straighten Stretcher is active, you
can pan and zoom the editor window at any time
using contextual controls (middle-button drag
or turn mouse wheel, respectively) to access a
differentpartofthewindow. Afterdoingso,
the s oftware still remembers the last vertex you
drag ged and draws a straig ht lin e between it and
the next one you drag. Similarly , you can adjust
the window using the control buttons and then
return to str ai g htening the stretcher. If the control
requires more than a single click, such as Pan, exit
the control by ri ght-clicking in the window and
then return to straightening the stretcher.
Tip: To create a symmetrical outline for the
stretcher,createtheoutlineononesideandthen
use Mirror Stretcher (following).
Mirror Stretcher—Mirrors the stretcher points
fromonesideofthemirroraxis(seefollowing)to
the other. By default, Mirror Stretcher mirrors the
points f rom the right side to the left.
Mirror Axis—Lets you spe cify the orientation of
themirroraxis.Theaxistakestheformofthree
yellow lines forming a T. The leg of the T indicates
thesidethatwillbemirroredwhenyouuse
Mirror Stretcher (see preceding), and the crossbar
indicates the axis across which the mirroring will
occur. Default=0.0. Range=0.0 to 360.0.
Select group
These commands let you select all the st retcher
points or the pelt UVs. As with other selection
methods, you can press and hold
Ct rl when you
use either of these to add to the current selection.
That is, to select a ll st retcher points and pelt UVs,
click one button, press and hold
Ctrl ,andthen
click the other button.
Select Stretcher—Selects all stretcher points.
Select Pelt UV s—Selects all pelt UVs.
Springs group
Theseparameterscontrolthespringsthatareused
to st retch the pelt. In most cases you won’t need
to change these values, except possibly for Pull
Strength.
Pull S trength—The magnitude of the stretching
action when you click Simulate Pelt Pulling.
Default=0.1. Range=0.0 to 0.5.
Ifthestretchingistoogradual,increasePull
Strength for a more forceful stretching action.
Stiffness—Sets the rate at which the springs pull.
The higher the Stiffness value, the mor e abrupt the
pulling action. D efault=0.16. Range=0.0 to 0.5.
Dampeni ng—Appliesadampeningorinhibiting
factor to the pulling action. The higher the
Dampening value, the greater the inhibition of the
stretcher. Default=0.16. Range=0.0 to 0.5.
Decay—Therateoffalloffoftheinfluenceof
each pelt-seam vertex on the other mapping
ver t ices. Higher D ecay values typically result in
significantly greater st retching, or undesirable
results. For best results, keep the Decay value low.
Default=0.25. Range=0.0 to 0.5.
Lock Open E dges —Locks the open edges in place.
This typically applies to using the stretcher on a
partial selection of mapping vertices in the pelt
region. WhenLockOpenEdgesison,selected
vertices next to unselected vertices tend to stay in
place during stret ching. When Lock Open Edges
is off, the selected vertices tend to pull away from
the unselected vert ices.
Simulation group
These are the m ain controls for the simulation, in
which the springs attached to the stretcher pu ll the
pelt seam vertices out, flattening the UV s. For best