def update(self, delta_frames=1):
"""Update the PipePair's position.
Arguments:
delta_frames: The number of frames elapsed since this method was
last called.
"""
self.x -= ANIMATION_SPEED * frames_to_msec(delta_frames)
def update(self, delta_frames=1):
"""Update the PipePair's position.
Arguments:
delta_frames: The number of frames elapsed since this method was
last called.
"""
self.x -= ANIMATION_SPEED * frames_to_msec(delta_frames)
def update(self, delta_frames=1):
"""Update the bird's position.
This function uses the cosine function to achieve a smooth climb:
In the first and last few frames, the bird climbs very little, in the
middle of the climb, it climbs a lot.
One complete climb lasts CLIMB_DURATION milliseconds, during which
the bird ascends with an average speed of CLIMB_SPEED px/ms.
This Bird's msec_to_climb attribute will automatically be
decreased accordingly if it was > 0 when this method was called.
Arguments:
delta_frames: The number of frames elapsed since this method was
last called.
"""
if self.msec_to_climb > 0:
frac_climb_done = 1 - self.msec_to_climb / Bird.CLIMB_DURATION
self.y -= (Bird.CLIMB_SPEED * frames_to_msec(delta_frames) *
(1 - math.cos(frac_climb_done * math.pi)))
self.msec_to_climb -= frames_to_msec(delta_frames)
else:
self.y += Bird.SINK_SPEED * frames_to_msec(delta_frames)
def update(self, delta_frames=1):
"""Update the bird's position.
This function uses the cosine function to achieve a smooth climb:
In the first and last few frames, the bird climbs very little, in the
middle of the climb, it climbs a lot.
One complete climb lasts CLIMB_DURATION milliseconds, during which
the bird ascends with an average speed of CLIMB_SPEED px/ms.
This Bird's msec_to_climb attribute will automatically be
decreased accordingly if it was > 0 when this method was called.
Arguments:
delta_frames: The number of frames elapsed since this method was
last called.
"""
if self.msec_to_climb > 0:
frac_climb_done = 1 - self.msec_to_climb / Bird.CLIMB_DURATION
self.y -= (Bird.CLIMB_SPEED * frames_to_msec(delta_frames) *
(1 - math.cos(frac_climb_done * math.pi)))
self.msec_to_climb -= frames_to_msec(delta_frames)
else:
self.y += Bird.SINK_SPEED * frames_to_msec(delta_frames)
