def calc_rel_angles(self, fixdata):
"""returns the relative angles between a sequence of "Fixation"s that build a scan path in Radiant
Relative angle for each saccade is the angle between that saccade and the previous saccade.
Args:
fixdata: a list of "Fixation"s
Returns:
a list of relative angles for the saccades formed by the given sequence of "Fixation"s in Radiant
"""
rel_angles = []
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1, len(fixdata)-1):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
nextx = fixdata[i+1].mappedfixationpointx
nexty = fixdata[i+1].mappedfixationpointy
(dist, theta) = geometry.vector_difference((x,y), (lastx, lasty))
(dist, nextheta) = geometry.vector_difference((x,y), (nextx, nexty))
theta = abs(theta-nextheta)
rel_angles.append(theta)
lastx=x
lasty=y
return rel_angles
def calc_rel_angles(self, fixdatalists):
"""returns the relative angles between a sequence of "Fixation"s that build a scan path in Radiant
Relative angle for each saccade is the angle between that saccade and the previous saccade.
Args:
fixdatalists: a list of lists of "Fixation"s
Returns:
a list of relative angles for the saccades formed by the given sequence of "Fixation"s in Radiant
"""
rel_angles = []
for fixdata in fixdatalists:
if not(fixdata):
continue
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1, len(fixdata)-1):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
nextx = fixdata[i+1].mappedfixationpointx
nexty = fixdata[i+1].mappedfixationpointy
(_, theta) = geometry.vector_difference((x,y), (lastx, lasty))
(_, nextheta) = geometry.vector_difference((x,y), (nextx, nexty))
theta = abs(theta-nextheta)
rel_angles.append(theta)
lastx=x
lasty=y
return rel_angles
def calc_abs_angles(self, fixdatalists):
"""returns the absolute angles between a sequence of "Fixation"s that build a scan path.
Abosolute angle for each saccade is the angle between that saccade and the horizental axis
Args:
fixdatalists: a list of lists of "Fixation"s
Returns:
a list of absolute angles for the saccades formed by the given sequence of "Fixation"s in Radiant
"""
abs_angles = []
for fixdata in fixdatalists:
if not(fixdata):
continue
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1,len(fixdata)):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
(_, theta) = geometry.vector_difference((lastx,lasty), (x, y))
abs_angles.append(abs(theta))
lastx=x
lasty=y
return abs_angles
def calc_abs_angles(self, fixdatalists):
"""returns the absolute angles between a sequence of "Fixation"s that build a scan path.
Abosolute angle for each saccade is the angle between that saccade and the horizental axis
Args:
fixdatalists: a list of lists of "Fixation"s
Returns:
a list of absolute angles for the saccades formed by the given sequence of "Fixation"s in Radiant
"""
abs_angles = []
for fixdata in fixdatalists:
if not(fixdata):
continue
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1,len(fixdata)):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
(_, theta) = geometry.vector_difference((lastx,lasty), (x, y))
abs_angles.append(abs(theta))
lastx=x
lasty=y
return abs_angles
def calc_rel_angles(self, fixdata):
rel_angles = []
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1, len(fixdata)-1):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
nextx = fixdata[i+1].mappedfixationpointx
nexty = fixdata[i+1].mappedfixationpointy
(dist, theta) = geometry.vector_difference((x,y), (lastx, lasty))
(dist, nextheta) = geometry.vector_difference((x,y), (nextx, nexty))
theta = abs(theta-nextheta)
rel_angles.append(theta)
lastx=x
lasty=y
return rel_angles
def calc_abs_angles(self, fixdata):
abs_angles = []
lastx = fixdata[0].mappedfixationpointx
lasty = fixdata[0].mappedfixationpointy
for i in xrange(1,len(fixdata)):
x = fixdata[i].mappedfixationpointx
y = fixdata[i].mappedfixationpointy
(dist, theta) = geometry.vector_difference((lastx,lasty), (x, y))
abs_angles.append(abs(theta))
lastx=x
lasty=y
return abs_angles
def calc_abs_angles(fixdata):
"""returns the absolute angles between a sequence of "Fixation"s that build a scan path.
Abosolute angle for each saccade is the angle between that saccade and the horizental axis
Args:
fixdata: a list of fixation datapoints
Returns:
a list of absolute angles for the saccades formed by the given sequence of "Fixation"s in Radiant
"""
abs_angles = []
lastx = fixdata[0][0]
lasty = fixdata[0][1]
for i in xrange(1,len(fixdata)):
x = fixdata[i][0]
y = fixdata[i][1]
(dist, theta) = geometry.vector_difference((lastx,lasty), (x, y))
abs_angles.append(abs(theta))
lastx = x
lasty = y
return abs_angles