Chain Constraints

The Constraints - Basic page defines the following constraints for a chain:

Constraint	Description
Angle Between	To constrain a chain so that access to or from the chain is limited by the minimum or maximum vector angles among the objects in the chain, specify the Minimum and/or Maximum vector angle. The angle between computation is computed using true positions, consistent with the Chains access computations when the Chains light time delay is off. Note: The Angle Between constraint is valid only for a chain that contains exactly three objects.
Link Duration	To constrain a chain so that accesses that are of shorter duration than the specified Minimum value are excluded from chain access results, specify the Minimum duration for a link between two access objects.
Filtering Intervals	Select the Use checkbox, and specify an .int file to filter the computed chain access intervals.

Constraint

Description

Angle Between

To constrain a chain so that access to or from the chain is limited by the minimum or maximum vector angles among the objects in the chain, specify the Minimum and/or Maximum vector angle.

The angle between computation is computed using true positions, consistent with the Chains access computations when the Chains light time delay is off.

Note: The Angle Between constraint is valid only for a chain that contains exactly three objects.

Link Duration

To constrain a chain so that accesses that are of shorter duration than the specified Minimum value are excluded from chain access results, specify the Minimum duration for a link between two access objects.

Filtering Intervals

Select the Use checkbox, and specify an .int file to filter the computed chain access intervals.