Add rotation matrix to movement or eye tracker data frame

Source: R/add_movement_functions.R

Takes a movement or eye tracker data frame, and adds rotation matrices from orientation data. For gaze data, rotation is computed wrt a reference vector, usually forward gaze.

add_rot(df, direction = c(0, 0, 1))

Arguments

df

Movement or eye tracker or combined/resampled data frame. Expects either columns `rot_x`, `rot_y`, `rot_z`, or columns `gaze_direction_x`, `gaze_direction_y`, `gaze_direction_z`

direction

Reference gaze direction. A single vector. Default: forward

Value

Same df with rotation matrices added