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simulation. For example, if your active segment ends at frame 200, when you
click New to create a new simulation, End Time is set to 200.
Calc Intervals Per Frame Specifies how many calculations are performed for
each frame of the simulation time range. Range=1 to 160.
Finding the right number for this spinner is a matter of experimentation. As
a general rule, the faster things are moving in the simulation, the higher you
should set this value.
NOTE If you find that some objects aren't colliding properly with others (they're
going through them), increase the Calc Intervals Per Frame value.
Keys Every N Frames Specifies the frequency with which keys are generated,
per object. If this were set to 2, keys would be generated in every other frame.
WARNING When you reduce the key count by increasing this setting, important
information can be lost. For example, if a collision occurs on frame n, the Dynamics
utility normally sets keys at frames n, n+1, and n-1. But if you've set Keys Every N
Frames to 2, a keyframe for the impact itself might not be generated, while keys
for the sudden reversal of motion would be generated on either side of the
(missing) impact. Thus, the motion controller is left to interpolate motion in a
region where the motion should be sharply defined. When this happens, motion
can be incorrect and the remainder of the solve is affected. In the aforementioned
example, a key describing the impact is lost and the motion controller interpolates
motion so that objects that should collide actually intersect, ruining the simulation.
Time Scale Slows down or speeds up the overall effect of the simulation. It
applies a linear scale factor to the outside forces affecting each object (gravity,
wind, and so on).
The default value of 1 results in normal speed. You can scale down the
simulation (make it slower) by using values below 1 (from 0.1 to 1), and you
can scale up the simulation (make it faster) by using values greater than 1
(from 1 to 100). If you speed up your simulation and objects begin to behave
incorrectly (going through objects, for example), increase the Calc Intervals
Per Frame value to compensate.
Simulation Controls group
Relates to IK settings and the transfer of momentum.
Use IK Joint Limits Uses the current IK joint limit settings as constraints for
hierarchies in the simulation.
Dynamics Utility | 3865