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Rope Modifier 791
objects are combined to prod uce a coefficient for
the interaction.
Air R esistance—Theextenttowhichtheropeloses
energy as it moves.
Rope Type—
• Spring—The default rope ty pe.
•
Stiffness—How much the rope can stretch.
•
Dampi ng—How quickly oscillations settle
down when the rope is compressed or
expands.
•
Num Weaves—Theextenttowhichtherope’s
inflexibility extends across vertices. For
example, a value of 3 ensures that all vertices
separated by three or fewer sections are
subject to ext ra forces to stop bending. Large
Num W eaves values produce an inflexible
rope, whereas small values mean that only
sections very close to each other will have
restricted relative movement.
•
Keep Shape—When on, the rope tries to
keep its original shape, such as a spiral,
rather than returning to a straight line. The
effect iveness of this depends on the number
of wea ves (the higher of number of weav es,
the stronger the shape-keeping forces).
•
Constra int—Uses a simpler, and hence less
computationally expensive, model to simulate
therope.Ropesofthistypearequitestiff,and
cannot be configured in the same way as ropes
with a Spring type.
Avoid Self -Inter sections—When on, the rope will
not intersect with itself during the simulation.
This results in a more realistic simulation, but can
increase simulation time.
Start With Current State—The rope star ts the
simulation using the current state stored in the
modifier. This can b e useful if you have, for
example, draped the rope around something in the
PreviewWindowandthenupdatedtheviewport
usingUpdateMAX.Whenoff,theropestartswith
the state it had originally, below the modifier in
the stack.
# S tored K ey f ra mes—The number of keyf rames, if
any, stored for the rope. reactor stores key frames
for the rope if you create an animation, or if you
useUpdateMAXinthePreviewWindow.
Clear Key f ra mes—Clears any stored keyfr ames for
this rope.
Use S oft S election—Allows you to use Soft Selection
to smo oth the transition between keyf r amed and
simulated vertices for this deformable object. Fo r
more information, see Soft Selection (page 2–800).
Reset Default Va lues—Resets the values for t his
rope to their defaults.
Constraints rollout
These options let you create a different types of
deformable constraint for the body. For more