def on_progress(self, progression: float) -> NoReturn:
progression = AnimationTransition.out_quad(progression)
if self._direction == "up":
self.screen_in.y = (self.manager.y + self.manager.height *
progression) - self.screen_in.height
self.screen_in.opacity = progression
if self._direction == "down":
self.screen_out.y = (self.manager.y -
self.manager.height * progression)
self.screen_out.opacity = 1 - progression
def sky_down(points, alpha):
x = AnimationTransition.out_quad(alpha)
x0, y0, x1, y1 = points
h = (y1 - y0) * (4 - 3 * x) # tend to correct height, from 0
w = (x1 - x0) * (x)
cx = (x0 + x1) / 2
return (
cx - w * .5, y0,
cx + w * .5, y0,
cx + w * .5, y0 + h,
cx - w * .5, y0 + h,
)
def sky_down(points, alpha):
x = AnimationTransition.out_quad(alpha)
x0, y0, x1, y1 = points
h = (y1 - y0) * (4 - 3 * x) # tend to correct height, from 0
w = (x1 - x0) * (x)
cx = (x0 + x1) / 2
return (
cx - w * .5,
y0,
cx + w * .5,
y0,
cx + w * .5,
y0 + h,
cx - w * .5,
y0 + h,
)
def roll_in(points, alpha):
x0, y0, x1, y1 = points
x = AnimationTransition.out_quad(alpha)
H = (y1 - y0)
W = (x1 - x0)
h = H * x
w = W * x
h2 = h / 2
w2 = w / 2
cx = (x0 + x1) / 2 + H * (1 - x)
cy = (y0 + y1) / 2 - H * .4 * (1 - x)
a = pi * x
pi4 = pi / 4
return (
cx + cos(a + 1 * pi4) * w2, cy + sin(a + 1 * pi4) * h2,
cx + cos(a + 3 * pi4) * w2, cy + sin(a + 3 * pi4) * h2,
cx + cos(a + 5 * pi4) * w2, cy + sin(a + 5 * pi4) * h2,
cx + cos(a + 7 * pi4) * w2, cy + sin(a + 7 * pi4) * h2,
)
def roll_in(points, alpha):
x0, y0, x1, y1 = points
x = AnimationTransition.out_quad(alpha)
H = (y1 - y0)
W = (x1 - x0)
h = H * x
w = W * x
h2 = h / 2
w2 = w / 2
cx = (x0 + x1) / 2 + H * (1 - x)
cy = (y0 + y1) / 2 - H * .4 * (1 - x)
a = pi * x
pi4 = pi / 4
return (
cx + cos(a + 1 * pi4) * w2,
cy + sin(a + 1 * pi4) * h2,
cx + cos(a + 3 * pi4) * w2,
cy + sin(a + 3 * pi4) * h2,
cx + cos(a + 5 * pi4) * w2,
cy + sin(a + 5 * pi4) * h2,
cx + cos(a + 7 * pi4) * w2,
cy + sin(a + 7 * pi4) * h2,
)
