Change the feature calculation to match the new unified format

- the timestamps are now in seconds, so no need to divide them
- the field is called ts, not mTime
# Standard imports
import math
import logging
import numpy as np
import emission.core.common as ec
import emission.analysis.section_features as sf

def calDistance(point1, point2):
    return ec.calDistance([point1.longitude, point1.latitude], [point2.longitude, point2.latitude])

def calHeading(point1, point2):
    return sf.calHeading([point1.longitude, point1.latitude],
                    [point2.longitude, point2.latitude])

def calHC(point1, point2, point3):
    return sf.calHC([point1.longitude, point1.latitude],
                    [point2.longitude, point2.latitude],
                    [point3.longitude, point3.latitude])

def calSpeed(point1, point2):
    distanceDelta = calDistance(point1, point2)
    timeDelta = point2.ts - point1.ts
    # print "Distance delta = %s and time delta = %s" % (distanceDelta, timeDelta)
    # assert(timeDelta != 0)
    if (timeDelta == 0):
        logging.debug("timeDelta = 0, distanceDelta = %s, returning speed = 0")
        assert(distanceDelta < 0.01)
        return 0

    return distanceDelta/timeDelta

# Standard imports
import math
import logging
import numpy as np
import emission.core.common as ec
import emission.analysis.section_features as sf

def calDistance(point1, point2):
    return ec.calDistance([point1.longitude, point1.latitude], [point2.longitude, point2.latitude])

def calHeading(point1, point2):
    return sf.calHeading([point1.longitude, point1.latitude],
                    [point2.longitude, point2.latitude])

def calHC(point1, point2, point3):
    return sf.calHC([point1.longitude, point1.latitude],
                    [point2.longitude, point2.latitude],
                    [point3.longitude, point3.latitude])

def calSpeed(point1, point2):
    distanceDelta = calDistance(point1, point2)
    timeDelta = point2.mTime - point1.mTime
    # print "Distance delta = %s and time delta = %s" % (distanceDelta, timeDelta)
    # assert(timeDelta != 0)
    if (timeDelta == 0):
        logging.debug("timeDelta = 0, distanceDelta = %s, returning speed = 0")
        assert(distanceDelta < 0.01)
        return 0

    # TODO: Once we perform the conversions from ms to secs as part of the
    # usercache -> timeseries switch, we need to remove this division by 1000
    return distanceDelta/(float(timeDelta)/1000)
