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Tracker Constraints (Tracker)
Adjusts trackers constraints, ie as found on the Coordinate System setup panel.
Trackers that are selected in the incoming pipeline are affected, so typically you should have tracker selection phases at the input. This phase can adjust many different modes on command, so each individual setting has options to leave that setting unchanged, and also to restore it from the main scene.
Axis locking can be set, ie to none, X, Y, Z, X and Y, X and Z, Y and Z, or X, Y, and Z. These are the same basic controls as found in the Coordinate System panel, but with none of the interpretation that panel supplies. Each point will ultimately be locked to either the numeric coordinate values present, or to the corresponding coordinate of the tracker it is linked to. Which case that is depends on subsequent phases as well; the data is presented here in its raw form.
The Tracker Constraints panel allows you to remove all links on the trackers, or (typically later) restore them to their main panel values.
There is a "Replace Vals" control that allows you to change some or all of the seed coordinates to values specified on this panel. If your solve has a number of points near the floor, you might possibly set this to change the height coordinate of all the selected trackers to zero, for example.
The polarity controls appear on the buttons of the Coordinate System panel, and allow you to specify which of several possible coordinate solutions you want. You can override them here.
You can also change whether trackers are seeds, or are pegged. See the Tracker Modes phase for other alterations to trackers.
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