def __init__(self, point1, point2=None, **kwargs):
self._vertical = False
self.places = 7
p1x = float(point1[XCOORD])
p1y = float(point1[YCOORD])
if point2 is not None: # case A
# normalize point order to assure consist signs for slopes
# +slope goes up and -slope goes down
self._slope = 0
self._angle = 0
p2x = float(point2[XCOORD])
p2y = float(point2[YCOORD])
if p1x > p2x:
p1x, p2x = p2x, p1x
p1y, p2y = p2y, p1y
dx = p2x - p1x
dy = p2y - p1y
if dx == 0.: # line is vertical
self._x = p1x
self._set_angle(HALF_PI)
else:
self._set_slope(dy / dx)
elif 'slope' in kwargs: # case B
self._set_slope(float(kwargs['slope']))
elif 'angle' in kwargs: # case C
self._set_angle(normalize_angle(float(kwargs['angle'])))
if self.is_vertical:
self._x = p1x
if not self.is_vertical:
# y0 is the y-coordinate of this ray at x-coordinate == 0
self._y0 = p1y - self.slope * p1x
def __init__(self, point1, point2=None, **kwargs):
self._vertical = False
self.places = 7
p1x = float(point1[XCOORD])
p1y = float(point1[YCOORD])
if point2 is not None: # case A
# normalize point order to assure consist signs for slopes
# +slope goes up and -slope goes down
self._slope = 0
self._angle = 0
p2x = float(point2[XCOORD])
p2y = float(point2[YCOORD])
if p1x > p2x :
p1x, p2x = p2x, p1x
p1y, p2y = p2y, p1y
dx = p2x - p1x
dy = p2y - p1y
if dx == 0. : # line is vertical
self._x = p1x
self._set_angle(HALF_PI)
else :
self._set_slope(dy/dx)
elif 'slope' in kwargs: # case B
self._set_slope(float(kwargs['slope']))
elif 'angle' in kwargs: # case C
self._set_angle(normalize_angle(float(kwargs['angle'])))
if self.is_vertical:
self._x = p1x
if not self.is_vertical:
# y0 is the y-coordinate of this ray at x-coordinate == 0
self._y0 = p1y - self.slope * p1x
def _set_slope(self, slope): # private
self._slope = slope
self._angle = normalize_angle(math.atan(slope))
