Define a coordinate system on stage
For a tracking system it is essential to create an absolute coordinate system where all actors and fixtures refer to. Define a zero point and the corresponding directions of the x and y axis. It is recommended to choose the directions of the axis parallel to the stage (Ideally take an existing stage coordinate
system). The z axis points up per definition.
Define calibration points
Define fixed calibration points at the corners around the stage in numerical order and one in the center of the stage. Apply yellow labels to mark the fixed calibration points. These
calibration points will be used to align the fixtures with the coordinate system.