OrigDataStartFrame, 1 in this case, indicates the frame number of the first frame (row) of data in the. NumFrames, 900 in this case, indicates the number of frames (rows) of data in the whole. So, for example, from frame 1 to frame 2, the time increases by 1/60 second. trc file figure above would look like this in plain text: Frame#… where indicates each tab character that would be present in the file.ĭataRate, 60 in this case, indicates the sampling rate of the data in this. Each row of data contains a frame number followed by a time value followed by the ( x, y, z) coordinates of each marker. trc file is a header, followed by two rows of column labels, followed by a blank row, followed by the rows of data.
The first few lines of the file are shown here. A fragment of this file is shown in the figure below.įigure.
trc file (subject01_c) is provided in the Models/Gait2354_Simbody directory, which is part of the OpenSim distribution. trc (Track Row Column) file format was created by Motion Analysis Corporation to specify the positions of markers placed on a subject at different times during a motion capture trial.
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