Skip segments with empty trkseg

[hugovk]

Fixes #45.

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Looking a bit closer, are we miscalculating the distance?

Simplifying this loop:

    for activity_track in activity.tracks:
        for segment in activity_track.segments:
            x0 = activity.tracks[0].segments[0].points[0].longitude
            y0 = activity.tracks[0].segments[0].points[0].latitude
            d0 = 0
            for point in segment.points:
                x = point.longitude
                y = point.latitude
                d = d0 + math.sqrt(math.pow(x - x0, 2) + math.pow(y - y0, 2))
                dist.append(d)
                x0 = x
                y0 = y

If we have two segments, should we be setting the initial (x0, y0) to the first point of each segment?

And not always to the first point of the first segment?

[hugovk]

Let's compare how process_fit() does it:

    for i in range(len(df.index)):
        if i < 1:
            x0 = df["longitude"][0]
            y0 = df["latitude"][0]
            d0 = 0
            dist.append(d0)
        else:
            x = df["longitude"][i]
            y = df["latitude"][i]
            d = d0 + math.sqrt(math.pow(x - x0, 2) + math.pow(y - y0, 2))
            dist.append(d)
            x0 = x
            y0 = y
            d0 = d

[marcusvolz]

I think you’re right @hugovk - I believe the corrected code should be:

x0 = segment.points[0].longitude
y0 = segment.points[0].latitude

[hugovk]

Updated!