MD, which uses physical models that actually exist, allows their motions to be adjusted intuitively. Sluggish motions can be achieved by increasing the weight parameter while light motions can be achieved by decreasing it. Reducing the spring coefficient creates soft motions while raising that coefficient produces motions with a stronger repellent force. Setting the coefficient to an extremely large value creates stiff motions.
Since MD uses elastic body models (based on mass, spring,
and resistance) for calculation, unintended vibration may
occur in the resultant motions.
The following
actions may be used to alleviate the problem.
In addition to vibration caused by parameter settings, abnormal motion (including vibration) may occur due to calculation errors. The following features may fix those problems.
Since approximated numeric values are used for MD calculations, the created motion might not be exactly the same as the desired motion. This means an error that occurred during calculation has grown to the level that affects motions.
This problem can be eliminated by adjusting the accuracy of
the calculations. To do this, open the
About button and then specify a parameter. The parameter to be
adjusted is Calculate resolution and it is set to a default value
of 10. Increasing this value improves the accuracy of calculation.
However, increasing this value also increases the amount of calculation
time. Keep in mind that setting
this value to an large value results in an unusually
long calculation time.