I just added a new widget to my GameTracker app to track the line of motion relative to the field of view. This is basically a calculation of the player's actual line of motion relative to where they were looking (the player-camera's yaw).

The rotation monitor in the upper right shows a diagnostic view on the yaw vs. pitch information about the player-camera.

The lower right-corner shows a caterpillar view on the player's movement through the game level. The big chart area shows the raw data, and the top-left has a list of the available sessions of data (that have already be cleaned/filtered of bad sessions).

Next, I'll be adding a bunch more statistics to the statistics view.... all of which will be output in a format that I can do post-processing in SPSS.

The major purpose of all this gadgetry is to allow me to tune and trust my calculated variables -- which will become critical when I begin to do statistical analysis on the video game player's navigational behavior.