9

Cloth Modifier 595
will only be the sum of the length of all of the
sides at rest. A low value will allow this length to
be greater then that off all of its sides at rest. This
length of stretched sides is not on a one to one
basis. One side of the polygon may stretch more
then another as long as the total shear value is not
exceeded.
Density —The weight of the cloth per unit area (in
gm/cm2). Higher values mean heavier cloth like
denim. Use smaller values for lig hter cloth like sil k.
Thick ness—Define s the virtual thick ness of a
fabric for the pur p ose of detecting cloth-to-cloth
collisions. This value is irrelevant if cloth-to-cloth
collisions are disabled. Larger values keep the
cloth separated by greater distances. Be careful
nottousetoolargeorsmallvaluesinthisfield.
Very large values w ill interfere w ith the natural
behavior of the cloth. Very small values will cause
the simulator to take too long to calculate. This
distance is measured in cm (centimeters) and
should be smaller than the size of the triangles that
make up the cloth object. A setting of 0.0 will let
Cloth automatically assign a reasonable value for
thickness.
Left:ThetoppieceofclothwithaThicknessof0
Right: Thickness of 9
Repulsion—The amount of force used to repel
other cloth objects. This value is irrelevant
if cloth-to-cloth collisions are disabled. The
simulator will apply a repulsion force scaled by
this value to keep the cloth from coming in contact
w ith other cloth objects. Increase this value i f there
are a lot of collisions between different parts of
cloth, or if the cloth is tending to interpenetrate.
Dampi ng—The larger this value, is the more
sluggishly the fabric will react. With a lower value,
thefabricwillbehavewithmorespring.Cloth
with more damping will come to rest sooner then
clothwithlessdamping.Highdampingresultsin
cloth that behaves as though it is moving thro ugh
oil. Excessive damping m ay also cause simulation
instabilities. A good value is the default, 0.01.
Air R es.—Resistance to Air. This value wi l l
determinehowmuchtheairwilleffectthecloth.A
higher amount of air resistance would be useful for
a tightly woven fabric, while a lower amoun t would
be suitable for a loose-knit garment.
Dyn. Fric.—Dy namic friction between the cloth
and solid objects. A larger value will add more
fr ic tion and cause the fabric to slide less across
an object. A lower value will allow the fabr ic to
slip off an object very easily, simi larly to how silk
would react.
Static Fric.—Static friction be tween the cloth and
solid objects. When the cloth is in stationary
position, this value will control its ability stay
where it is, or slip away.
Self Fric.—Friction between the cloth and itself.
This is simila r to dynamic and static friction , but
applies to cloth-to-cloth or self-collisions. A larger
value will cause more friction b etween the cloth
and itself.
UScale—Controls how much to shrink or expand
the cloth along the U direction (as defined by
Garment Maker. For non-Garment Maker meshes,
this applies a u niform scaling to the cloth along
both axes, and the V Scale parameter is ignored).
A value of less than 1 will shrink the fabric at
simulation time, w hile a value of more than 1 w ill
stretch it.