def create_path(self):
path = VGroup()
self.get_path_xyz()
if len(self.path_xyz) > 1:
for i in range(len(self.path_xyz) - 1):
if type(self.trail_color) == str:
path.add(
Line(self.path_xyz[i],
self.path_xyz[i + 1],
stroke_color=self.trail_color,
stroke_opacity=self.rate_func(i /
len(self.path_xyz)),
plot_depth=self.rate_func(2 -
i / len(self.path_xyz)),
stroke_width=self.max_width *
self.rate_func(i / len(self.path_xyz))))
else:
path.add(
Line(self.path_xyz[i],
self.path_xyz[i + 1],
stroke_color=self.colors[i],
stroke_opacity=self.rate_func(i /
len(self.path_xyz)),
plot_depth=self.rate_func(2 -
i / len(self.path_xyz)),
stroke_width=self.max_width *
self.rate_func(i / len(self.path_xyz))))
# print('i = %d' % i)
# # print(self.path_xyz)
# print(self.color)
# print(self.rate_func(i/len(self.path_xyz)))
# print(self.max_width*self.rate_func(i/len(self.path_xyz)))
return path
def add_size(self, text, scale=1, buff=0.1, **moreargs):
linea_referencia = Line(self[0][0].get_start(), self[0][-1].get_end())
texto = TextMobject(text, **moreargs)
ancho = texto.get_height() / 2
texto.rotate(linea_referencia.get_angle())
texto.shift(self.direccion * (buff + 1) * ancho)
return self.add(texto)
def __init__(self, text, texmob=None, **kwargs):
digest_config(self, kwargs)
VGroup.__init__(self, **kwargs)
pre_coord_dl = text.get_corner(DL)
pre_coord_ur = text.get_corner(UR)
reference_line = Line(pre_coord_dl, pre_coord_ur)
reference_unit_vector = reference_line.get_unit_vector()
coord_dl = text.get_corner(
DL) - text.get_center() - reference_unit_vector * self.buff_line
coord_ur = text.get_corner(
UR) - text.get_center() + reference_unit_vector * self.buff_line
if texmob == None:
line = Line(coord_dl, coord_ur, **self.line_kwargs)
self.add(line)
else:
arrow = Arrow(coord_dl, coord_ur, **self.line_kwargs)
unit_vector = arrow.get_unit_vector()
if self.buff_text == None:
self.buff_text = get_norm(
(texmob.get_center() -
texmob.get_critical_point(unit_vector)) / 2) * 2
texmob.move_to(arrow.get_end() + unit_vector * self.buff_text)
self.add(arrow, texmob)
class Arrow3d(VGroup):
CONFIG = {
"cone_config": {
"height": .5,
"base_radius": .25,
},
"color": WHITE,
}
def __init__(self, start=LEFT, end=RIGHT, **kwargs):
VGroup.__init__(self, **kwargs)
# TODO: inherit color
self.line = Line(start, end)
self.line.set_color(self.color)
self.cone = Cone(direction=self.direction, **self.cone_config)
self.cone.shift(self.end)
self.cone.set_color(self.color)
self.add(self.line, self.cone)
@property
def start(self):
return self.line.start
@property
def end(self):
return self.line.end
@property
def direction(self):
return self.end - self.start
def __init__(self, **kwargs):
SVGMobject.__init__(self, **kwargs)
self.set_height(self.height)
self.set_stroke(color=WHITE, width=0)
self.set_fill(self.color, opacity=1)
from manimlib.for_3b1b_videos.pi_creature import Randolph
randy = Randolph(mode="happy")
randy.set_height(0.6 * self.get_height())
randy.stretch(0.8, 0)
randy.look(RIGHT)
randy.move_to(self)
randy.shift(0.07 * self.height * (RIGHT + UP))
self.randy = self.pi_creature = randy
self.add_to_back(randy)
orientation_line = Line(self.get_left(), self.get_right())
orientation_line.set_stroke(width=0)
self.add(orientation_line)
self.orientation_line = orientation_line
for light, color in zip(self.get_lights(), self.light_colors):
light.set_fill(color, 1)
light.is_subpath = False
self.add_treds_to_tires()
def get_tex(self,
tex,
scale=1,
buff=1,
invert_dir=False,
invert_texto=False,
remove_rot=True,
**moreargs):
linea_referencia = Line(self[0][0].get_start(), self[0][-1].get_end())
texto = TexMobject(tex, **moreargs)
ancho = texto.get_height() / 2
if invert_texto:
inv = PI
else:
inv = 0
if remove_rot:
texto.scale(scale).move_to(self)
else:
texto.rotate(
linea_referencia.get_angle()).scale(scale).move_to(self)
texto.rotate(inv)
if invert_dir:
inv = -1
else:
inv = 1
texto.shift(self.direccion * (buff + 1) * ancho)
return texto
def get_axes(self):
"""
Returns a set of 3D Axes.
Returns
-------
ThreeDAxes object
"""
axes = ThreeDAxes(**self.three_d_axes_config)
for axis in axes:
if self.cut_axes_at_radius:
p0 = axis.get_start()
p1 = axis.number_to_point(-1)
p2 = axis.number_to_point(1)
p3 = axis.get_end()
new_pieces = VGroup(
Line(p0, p1),
Line(p1, p2),
Line(p2, p3),
)
for piece in new_pieces:
piece.shade_in_3d = True
new_pieces.match_style(axis.pieces)
axis.pieces.submobjects = new_pieces.submobjects
for tick in axis.tick_marks:
tick.add(VectorizedPoint(1.5 * tick.get_center(), ))
return axes
def __init__(self, corner=ORIGIN, angle=0, **kwargs):
VGroup.__init__(self, **kwargs)
self.corner = ORIGIN
self.angle = 0
r = UR if self.on_the_right else UL
self.add(
Polygon(ORIGIN,
RIGHT * self.size * r,
UR * self.size * r,
UP * self.size * r,
stroke_width=0,
fill_color=self.fill_color,
fill_opacity=self.fill_opacity),
Line(RIGHT * self.size * r,
UR * self.size * r + UP * self.stroke_width / 100 / 2 * 0.8,
stroke_width=self.stroke_width,
stroke_color=self.stroke_color),
Line(UR * self.size * r +
RIGHT * self.stroke_width / 100 / 2 * r * 0.8,
UP * self.size * r,
stroke_width=self.stroke_width,
stroke_color=self.stroke_color),
)
self.move_corner_to(corner)
self.change_angle_to(angle)
def __init__(self, mobject, **kwargs):
VGroup.__init__(self,
Line(UP + LEFT, DOWN + RIGHT),
Line(UP + RIGHT, DOWN + LEFT),
)
self.replace(mobject, stretch=True)
self.set_stroke(self.stroke_color, self.stroke_width)
def __init__(self, mobject, **kwargs):
super().__init__(
Line(UL, DR),
Line(UR, DL),
)
self.insert_n_curves(2)
self.replace(mobject, stretch=True)
self.set_stroke(self.stroke_color, width=self.stroke_width)
def get_cross(self):
cross = VGroup(Line(UP + LEFT, DOWN + RIGHT, **self.cross_kwargs),
Line(UP + RIGHT, DOWN + LEFT, **self.cross_kwargs))
cross.stretch_to_fit_width(self.box.get_width())
cross.stretch_to_fit_height(self.box.get_height())
cross.scale(0.5)
cross.move_to(self.box)
return cross
class LinearNumberSlider(ControlMobject):
CONFIG = {
# Since, only slider circle listnes to drag event
"listen_to_events": False,
"value_type": np.float64,
"min_value": -10.0,
"max_value": 10.0,
"step": 1.0,
"rounded_rect_kwargs": {
"height": 0.075,
"width": 2,
"corner_radius": 0.0375
},
"circle_kwargs": {
"radius": 0.1,
"stroke_color": GREY_A,
"fill_color": GREY_A,
"fill_opacity": 1.0
}
}
def __init__(self, value=0, **kwargs):
digest_config(self, kwargs)
self.bar = RoundedRectangle(**self.rounded_rect_kwargs)
self.slider = Circle(**self.circle_kwargs)
self.slider_axis = Line(start=self.bar.get_bounding_box_point(LEFT),
end=self.bar.get_bounding_box_point(RIGHT))
self.slider_axis.set_opacity(0.0)
self.slider.move_to(self.slider_axis)
self.slider.listen_to_events = True
self.slider.on_mouse_drag = self.slider_on_mouse_drag
super().__init__(value, self.bar, self.slider, self.slider_axis,
**kwargs)
def assert_value(self, value):
assert (self.min_value <= value <= self.max_value)
def set_value_anim(self, value):
prop = (value - self.min_value) / (self.max_value - self.min_value)
self.slider.move_to(self.slider_axis.point_from_proportion(prop))
def slider_on_mouse_drag(self, point, d_point, buttons, modifiers):
self.set_value(self.get_value_from_point(point))
return False
# Helper Methods
def get_value_from_point(self, point):
start, end = self.slider_axis.get_start_and_end()
point_on_line = get_closest_point_on_line(start, end, point)
prop = get_norm(point_on_line - start) / get_norm(end - start)
value = self.min_value + prop * (self.max_value - self.min_value)
no_of_steps = int((value - self.min_value) / self.step)
value_nearest_to_step = self.min_value + no_of_steps * self.step
return value_nearest_to_step
class LinearNumberSlider(ControlMobject):
CONFIG = {
"value_type": np.float64,
"min_value": -10.0,
"max_value": 10.0,
"step": 1.0,
"rounded_rect_kwargs": {
"height": 0.075,
"width": 2,
"corner_radius": 0.0375
},
"circle_kwargs": {
"radius": 0.1,
"stroke_color": GREY_A,
"fill_color": GREY_A,
"fill_opacity": 1.0
}
}
def __init__(self, value: float = 0, **kwargs):
digest_config(self, kwargs)
self.bar = RoundedRectangle(**self.rounded_rect_kwargs)
self.slider = Circle(**self.circle_kwargs)
self.slider_axis = Line(
start=self.bar.get_bounding_box_point(LEFT),
end=self.bar.get_bounding_box_point(RIGHT)
)
self.slider_axis.set_opacity(0.0)
self.slider.move_to(self.slider_axis)
self.slider.add_mouse_drag_listner(self.slider_on_mouse_drag)
super().__init__(value, self.bar, self.slider, self.slider_axis, **kwargs)
def assert_value(self, value: float) -> None:
assert(self.min_value <= value <= self.max_value)
def set_value_anim(self, value: float) -> None:
prop = (value - self.min_value) / (self.max_value - self.min_value)
self.slider.move_to(self.slider_axis.point_from_proportion(prop))
def slider_on_mouse_drag(self, mob, event_data: dict[str, np.ndarray]) -> bool:
self.set_value(self.get_value_from_point(event_data["point"]))
return False
# Helper Methods
def get_value_from_point(self, point: np.ndarray) -> float:
start, end = self.slider_axis.get_start_and_end()
point_on_line = get_closest_point_on_line(start, end, point)
prop = get_norm(point_on_line - start) / get_norm(end - start)
value = self.min_value + prop * (self.max_value - self.min_value)
no_of_steps = int((value - self.min_value) / self.step)
value_nearest_to_step = self.min_value + no_of_steps * self.step
return value_nearest_to_step
def __init__(self, A, O, B, **kwargs):
VMobject.__init__(self, **kwargs)
OA, OB = A-O, B-O
theta = np.angle(complex(*OA[:2])/complex(*OB[:2])) # angle of OB to OA
self.add(Arc(start_angle=Line(O, B).get_angle(), angle=theta, radius=self.radius/2,
stroke_width=100 * self.radius, color=self.color).set_stroke(opacity=self.opacity).move_arc_center_to(O))
self.add(Arc(start_angle=Line(O, B).get_angle(), angle=theta, radius=self.radius,
stroke_width=self.stroke_width, color=self.color).move_arc_center_to(O))
def get_checkmark(self):
checkmark = VGroup(
Line(UP / 2 + 2 * LEFT, DOWN + LEFT, **self.checkmark_kwargs),
Line(DOWN + LEFT, UP + RIGHT, **self.checkmark_kwargs))
checkmark.stretch_to_fit_width(self.box.get_width())
checkmark.stretch_to_fit_height(self.box.get_height())
checkmark.scale(0.5)
checkmark.move_to(self.box)
return checkmark
def coords_to_vector(self,
vector,
coords_start=2 * RIGHT + 2 * UP,
clean_up=True):
starting_mobjects = list(self.submobjects)
array = Matrix(vector)
array.shift(coords_start)
arrow = Vector(vector)
x_line = Line(ORIGIN, vector[0] * RIGHT)
y_line = Line(x_line.get_end(), arrow.get_end())
x_line.set_color(X_COLOR)
y_line.set_color(Y_COLOR)
x_coord, y_coord = array.get_mob_matrix().flatten()
self.play(Write(array, run_time=1))
self.wait()
self.play(
ApplyFunction(
lambda x: self.position_x_coordinate(x, x_line, vector),
x_coord))
self.play(ShowCreation(x_line))
self.play(
ApplyFunction(
lambda y: self.position_y_coordinate(y, y_line, vector),
y_coord), FadeOut(array.get_brackets()))
y_coord, brackets = self.get_mobjects_from_last_animation()
self.play(ShowCreation(y_line))
self.play(ShowCreation(arrow))
self.wait()
if clean_up:
self.clear()
self.add(*starting_mobjects)
def __init__(self, value=0, **kwargs):
digest_config(self, kwargs)
self.bar = RoundedRectangle(**self.rounded_rect_kwargs)
self.slider = Circle(**self.circle_kwargs)
self.slider_axis = Line(start=self.bar.get_bounding_box_point(LEFT),
end=self.bar.get_bounding_box_point(RIGHT))
self.slider_axis.set_opacity(0.0)
self.slider.move_to(self.slider_axis)
super().__init__(value, self.bar, self.slider, self.slider_axis,
**kwargs)
def vector_to_coords(self, vector, integer_labels=True, clean_up=True):
"""
This method displays vector as a Vector() based vector, and then shows
the corresponding lines that make up the x and y components of the vector.
Then, a column matrix (henceforth called the label) is created near the
head of the Vector.
Parameters
----------
vector Union(np.ndarray, list, tuple)
The vector to show.
integer_label (bool=True)
Whether or not to round the value displayed.
in the vector's label to the nearest integer
clean_up (bool=True)
Whether or not to remove whatever
this method did after it's done.
"""
starting_mobjects = list(self.mobjects)
show_creation = False
if isinstance(vector, Arrow):
arrow = vector
vector = arrow.get_end()[:2]
else:
arrow = Vector(vector)
show_creation = True
array = vector_coordinate_label(arrow, integer_labels=integer_labels)
x_line = Line(ORIGIN, vector[0] * RIGHT)
y_line = Line(x_line.get_end(), arrow.get_end())
x_line.set_color(X_COLOR)
y_line.set_color(Y_COLOR)
x_coord, y_coord = array.get_mob_matrix().flatten()
x_coord_start = self.position_x_coordinate(x_coord.copy(), x_line,
vector)
y_coord_start = self.position_y_coordinate(y_coord.copy(), y_line,
vector)
brackets = array.get_brackets()
if show_creation:
self.play(ShowCreation(arrow))
self.play(ShowCreation(x_line), Write(x_coord_start), run_time=1)
self.play(ShowCreation(y_line), Write(y_coord_start), run_time=1)
self.wait()
self.play(
Transform(x_coord_start, x_coord, lag_ratio=0),
Transform(y_coord_start, y_coord, lag_ratio=0),
Write(brackets, run_time=1),
)
self.wait()
self.remove(x_coord_start, y_coord_start, brackets)
self.add(array)
if clean_up:
self.clear()
self.add(*starting_mobjects)
return array, x_line, y_line
def get_crosshair(self):
line = Line(LEFT, RIGHT)
line.insert_n_curves(1)
lines = line.replicate(2)
lines[1].rotate(PI / 2)
crosshair = VMobject()
crosshair.set_points([*lines[0].get_points(), *lines[1].get_points()])
crosshair.set_width(self.crosshair_width)
crosshair.set_stroke(self.crosshair_color, width=[2, 0, 2, 2, 0, 2])
crosshair.set_animating_status(True)
crosshair.fix_in_frame()
return crosshair
def __init__(self, start=LEFT, end=RIGHT, **kwargs):
VGroup.__init__(self, **kwargs)
# TODO: inherit color
self.line = Line(start, end)
self.line.set_color(self.color)
self.cone = Cone(direction=self.direction, **self.cone_config)
self.cone.shift(self.end)
self.cone.set_color(self.color)
self.add(self.line, self.cone)
def construct(self):
axes = Axes(x_axis_config={
"include_ticks": False
},
y_axis_config={
"include_ticks": False
},
number_line_config={
"color": self.axes_color
}).scale(0.9)
self.add(axes)
ellipse = Ellipse(width=self.width, height=self.height)
ellipse_x_axis = DashedLine(self.width / 2 * LEFT,
self.width / 2 * RIGHT,
color=BLACK)
ellipse_y_axis = DashedLine(self.height / 2 * UP,
self.height / 2 * DOWN,
color=BLACK)
elipticity_line = Line(self.width / 2 * LEFT,
self.height / 2 * UP,
color=BLUE)
elipticity_arc = Arc(0, math.atan(self.height / self.width)).shift(
self.width / 2 * LEFT)
ellipse_group = VGroup(ellipse, ellipse_x_axis, ellipse_y_axis,
elipticity_arc, elipticity_line)
ellipse_group.rotate(self.azimuth)
self.add(ellipse_group)
rightest = self.get_ellipse_rightest_point(self.width / 2,
self.height / 2,
self.azimuth)
highest = self.get_ellipse_highest_point(self.width / 2,
self.height / 2, self.azimuth)
vertical_line = Line(rightest * RIGHT,
rightest * RIGHT + highest * UP,
color=GREEN)
horizontal_line = Line(highest * UP,
highest * UP + rightest * RIGHT,
color=GREEN)
self.bring_to_back(vertical_line, horizontal_line)
azimuth_arc = Arc(0, self.azimuth)
self.add(azimuth_arc)
self.wait()
def add_lines(self, left, right):
line_kwargs = {
"color": BLUE,
"stroke_width": 2,
}
left_rows = [VGroup(*row) for row in left.get_mob_matrix()]
h_lines = VGroup()
for row in left_rows[:-1]:
h_line = Line(row.get_left(), row.get_right(), **line_kwargs)
h_line.next_to(row, DOWN, buff=left.v_buff / 2.)
h_lines.add(h_line)
right_cols = [
VGroup(*col) for col in np.transpose(right.get_mob_matrix())
]
v_lines = VGroup()
for col in right_cols[:-1]:
v_line = Line(col.get_top(), col.get_bottom(), **line_kwargs)
v_line.next_to(col, RIGHT, buff=right.h_buff / 2.)
v_lines.add(v_line)
self.play(ShowCreation(h_lines))
self.play(ShowCreation(v_lines))
self.wait()
self.show_frame()
def __init__(self, **kwargs):
digest_config(self, kwargs)
start = self.unit_size * self.x_min * RIGHT
end = self.unit_size * self.x_max * RIGHT
Line.__init__(self, start, end, **kwargs)
self.shift(-self.number_to_point(self.number_at_center))
self.init_leftmost_tick()
if self.include_tip:
self.add_tip()
if self.include_ticks:
self.add_tick_marks()
if self.include_numbers:
self.add_numbers()
def __init__(self, mobject, **kwargs):
if not hasattr(self, "args"):
self.args = serialize_args([mobject])
if not hasattr(self, "config"):
self.config = serialize_config({
**kwargs,
})
VGroup.__init__(
self,
Line(UP + LEFT, DOWN + RIGHT),
Line(UP + RIGHT, DOWN + LEFT),
)
self.replace(mobject, stretch=True)
self.set_stroke(self.stroke_color, self.stroke_width)
def __init__(self, **kwargs):
digest_config(self, kwargs)
start = self.unit_size * self.x_min * RIGHT
end = self.unit_size * self.x_max * RIGHT
Line.__init__(self, start, end, **kwargs)
self.shift(-self.number_to_point(self.number_at_center))
self.init_leftmost_tick()
if self.include_tip:
self.add_tip()
if self.include_ticks:
self.add_tick_marks()
if self.include_numbers:
self.add_numbers()
def add_axes(self):
x_axis = Line(self.tick_width * LEFT / 2, self.width * RIGHT)
y_axis = Line(MED_LARGE_BUFF * DOWN, self.height * UP)
ticks = VGroup()
heights = np.linspace(0, self.height, self.n_ticks + 1)
values = np.linspace(0, self.max_value, self.n_ticks + 1)
for y, value in zip(heights, values):
tick = Line(LEFT, RIGHT)
tick.set_width(self.tick_width)
tick.move_to(y * UP)
ticks.add(tick)
y_axis.add(ticks)
self.add(x_axis, y_axis)
self.x_axis, self.y_axis = x_axis, y_axis
if self.label_y_axis:
labels = VGroup()
for tick, value in zip(ticks, values):
label = TexMobject(str(np.round(value, 2)))
label.set_height(self.y_axis_label_height)
label.next_to(tick, LEFT, SMALL_BUFF)
labels.add(label)
self.y_axis_labels = labels
self.add(labels)
def coords_to_vector(self,
vector,
coords_start=2 * RIGHT + 2 * UP,
clean_up=True):
"""
This method writes the vector as a column matrix (henceforth called the label),
takes the values in it one by one, and form the corresponding
lines that make up the x and y components of the vector. Then, an
Vector() based vector is created between the lines on the Screen.
Parameters
----------
vector Union(np.ndarray, list, tuple)
The vector to show.
coords_start Union(np.ndarray,list,tuple)
The starting point of the location of
the label of the vector that shows it
numerically.
Defaults to 2 * RIGHT + 2 * UP or (2,2)
clean_up (bool=True)
Whether or not to remove whatever
this method did after it's done.
"""
starting_mobjects = list(self.mobjects)
array = Matrix(vector)
array.shift(coords_start)
arrow = Vector(vector)
x_line = Line(ORIGIN, vector[0] * RIGHT)
y_line = Line(x_line.get_end(), arrow.get_end())
x_line.set_color(X_COLOR)
y_line.set_color(Y_COLOR)
x_coord, y_coord = array.get_mob_matrix().flatten()
self.play(Write(array, run_time=1))
self.wait()
self.play(
ApplyFunction(
lambda x: self.position_x_coordinate(x, x_line, vector),
x_coord))
self.play(ShowCreation(x_line))
self.play(
ApplyFunction(
lambda y: self.position_y_coordinate(y, y_line, vector),
y_coord), FadeOut(array.get_brackets()))
y_coord, brackets = self.get_mobjects_from_last_animation()
self.play(ShowCreation(y_line))
self.play(ShowCreation(arrow))
self.wait()
if clean_up:
self.clear()
self.add(*starting_mobjects)
def add_treds_to_tires(self):
for tire in self.get_tires():
radius = tire.get_width() / 2
center = tire.get_center()
tred = Line(0.9 * radius * RIGHT,
1.4 * radius * RIGHT,
stroke_width=2,
color=BLACK)
tred.rotate_in_place(np.pi / 4)
for theta in np.arange(0, 2 * np.pi, np.pi / 4):
new_tred = tred.copy()
new_tred.rotate(theta, about_point=ORIGIN)
new_tred.shift(center)
tire.add(new_tred)
return self
def get_tick(self, x, size=None):
if size is None:
size = self.tick_size
result = Line(size * DOWN, size * UP)
result.rotate(self.get_angle())
result.move_to(self.number_to_point(x))
result.match_style(self)
return result
def __init__(self, **kwargs):
circle = Circle(color=WHITE)
ticks = []
for x in range(12):
alpha = x / 12.
point = complex_to_R3(np.exp(2 * np.pi * alpha * complex(0, 1)))
length = 0.2 if x % 3 == 0 else 0.1
ticks.append(Line(point, (1 - length) * point))
self.hour_hand = Line(ORIGIN, 0.3 * UP)
self.minute_hand = Line(ORIGIN, 0.6 * UP)
# for hand in self.hour_hand, self.minute_hand:
# #Balance out where the center is
# hand.add(VectorizedPoint(-hand.get_end()))
VGroup.__init__(self, circle, self.hour_hand, self.minute_hand, *ticks)
def init_points(self):
start_angle = np.pi / 2 + self.arc_angle / 2
end_angle = np.pi / 2 - self.arc_angle / 2
self.add(Arc(start_angle=start_angle, angle=-self.arc_angle))
tick_angle_range = np.linspace(start_angle, end_angle, self.num_ticks)
for index, angle in enumerate(tick_angle_range):
vect = rotate_vector(RIGHT, angle)
tick = Line((1 - self.tick_length) * vect, vect)
label = TexMobject(str(10 * index))
label.set_height(self.tick_length)
label.shift((1 + self.tick_length) * vect)
self.add(tick, label)
needle = Polygon(LEFT,
UP,
RIGHT,
stroke_width=0,
fill_opacity=1,
fill_color=self.needle_color)
needle.stretch_to_fit_width(self.needle_width)
needle.stretch_to_fit_height(self.needle_height)
needle.rotate(start_angle - np.pi / 2, about_point=ORIGIN)
self.add(needle)
self.needle = needle
self.center_offset = self.get_center()
def update_trail(self, trail):
err = 1e-9
pos_new = self[0].get_center()
pos_old = self.pos_old
self.pos_old = pos_new
# if np.sqrt(sum((pos_new - pos_old) ** 2))>err:
if sum(abs(pos_new - pos_old)) > err:
trail.add(
Line(pos_old, pos_new, color=self.trail_color, plot_depth=0))
if len(trail) > self.nums:
trail.remove(trail[0])
# for k in range(self.nums):
# trail[k].set_stroke(width=self.max_width * self.rate_func(k/self.nums),
# opacity=self.rate_func(k/self.nums))
for l in trail:
k = trail.submobjects.index(l)
l.set_stroke(width=self.max_width *
self.rate_func(k / self.nums),
opacity=self.rate_func(k / self.nums))
if len(trail) <= self.nums and len(trail) > 0:
# for k in range(len(trail)):
# trail[k].set_stroke(width=self.max_width * self.rate_func(k/len(trail)),
# opacity=self.rate_func(k/len(trail)))
for l in trail:
k = trail.submobjects.index(l)
l.set_stroke(width=self.max_width *
self.rate_func(k / len(trail)),
opacity=self.rate_func(k / len(trail)))
def add_treds_to_tires(self):
for tire in self.get_tires():
radius = tire.get_width() / 2
center = tire.get_center()
tred = Line(
0.7 * radius * RIGHT, 1.1 * radius * RIGHT,
stroke_width=2,
color=BLACK
)
tred.rotate(PI / 5, about_point=tred.get_end())
for theta in np.arange(0, 2 * np.pi, np.pi / 4):
new_tred = tred.copy()
new_tred.rotate(theta, about_point=ORIGIN)
new_tred.shift(center)
tire.add(new_tred)
return self
def coords_to_vector(self, vector, coords_start=2 * RIGHT + 2 * UP, clean_up=True):
starting_mobjects = list(self.mobjects)
array = Matrix(vector)
array.shift(coords_start)
arrow = Vector(vector)
x_line = Line(ORIGIN, vector[0] * RIGHT)
y_line = Line(x_line.get_end(), arrow.get_end())
x_line.set_color(X_COLOR)
y_line.set_color(Y_COLOR)
x_coord, y_coord = array.get_mob_matrix().flatten()
self.play(Write(array, run_time=1))
self.wait()
self.play(ApplyFunction(
lambda x: self.position_x_coordinate(x, x_line, vector),
x_coord
))
self.play(ShowCreation(x_line))
self.play(
ApplyFunction(
lambda y: self.position_y_coordinate(y, y_line, vector),
y_coord
),
FadeOut(array.get_brackets())
)
y_coord, brackets = self.get_mobjects_from_last_animation()
self.play(ShowCreation(y_line))
self.play(ShowCreation(arrow))
self.wait()
if clean_up:
self.clear()
self.add(*starting_mobjects)
def get_tick(self, x, size=None):
if size is None:
size = self.tick_size
result = Line(size * DOWN, size * UP)
result.rotate(self.get_angle())
result.move_to(self.number_to_point(x))
result.match_style(self)
return result
def add_lines(self, left, right):
line_kwargs = {
"color": BLUE,
"stroke_width": 2,
}
left_rows = [
VGroup(*row) for row in left.get_mob_matrix()
]
h_lines = VGroup()
for row in left_rows[:-1]:
h_line = Line(row.get_left(), row.get_right(), **line_kwargs)
h_line.next_to(row, DOWN, buff=left.v_buff / 2.)
h_lines.add(h_line)
right_cols = [
VGroup(*col) for col in np.transpose(right.get_mob_matrix())
]
v_lines = VGroup()
for col in right_cols[:-1]:
v_line = Line(col.get_top(), col.get_bottom(), **line_kwargs)
v_line.next_to(col, RIGHT, buff=right.h_buff / 2.)
v_lines.add(v_line)
self.play(ShowCreation(h_lines))
self.play(ShowCreation(v_lines))
self.wait()
self.show_frame()
def __init__(self, *text_parts, **kwargs):
TextMobject.__init__(self, *text_parts, **kwargs)
self.scale(self.scale_factor)
self.to_edge(UP)
if self.include_underline:
underline = Line(LEFT, RIGHT)
underline.next_to(self, DOWN, buff=self.underline_buff)
if self.match_underline_width_to_text:
underline.match_width(self)
else:
underline.set_width(self.underline_width)
self.add(underline)
self.underline = underline
def __init__(self, **kwargs):
SVGMobject.__init__(self, **kwargs)
path = self.submobjects[0]
subpaths = path.get_subpaths()
path.clear_points()
for indices in [(0, 1), (2, 3), (4, 6, 7), (5,), (8,)]:
part = VMobject()
for index in indices:
part.append_points(subpaths[index])
path.add(part)
self.set_height(self.height)
self.set_stroke(color=WHITE, width=0)
self.set_fill(self.color, opacity=1)
from manimlib.for_3b1b_videos.pi_creature import Randolph
randy = Randolph(mode="happy")
randy.set_height(0.6 * self.get_height())
randy.stretch(0.8, 0)
randy.look(RIGHT)
randy.move_to(self)
randy.shift(0.07 * self.height * (RIGHT + UP))
self.randy = self.pi_creature = randy
self.add_to_back(randy)
orientation_line = Line(self.get_left(), self.get_right())
orientation_line.set_stroke(width=0)
self.add(orientation_line)
self.orientation_line = orientation_line
for light, color in zip(self.get_lights(), self.light_colors):
light.set_fill(color, 1)
light.is_subpath = False
self.add_treds_to_tires()
def vector_to_coords(self, vector, integer_labels=True, clean_up=True):
starting_mobjects = list(self.mobjects)
show_creation = False
if isinstance(vector, Arrow):
arrow = vector
vector = arrow.get_end()[:2]
else:
arrow = Vector(vector)
show_creation = True
array = vector_coordinate_label(arrow, integer_labels=integer_labels)
x_line = Line(ORIGIN, vector[0] * RIGHT)
y_line = Line(x_line.get_end(), arrow.get_end())
x_line.set_color(X_COLOR)
y_line.set_color(Y_COLOR)
x_coord, y_coord = array.get_mob_matrix().flatten()
x_coord_start = self.position_x_coordinate(
x_coord.copy(), x_line, vector
)
y_coord_start = self.position_y_coordinate(
y_coord.copy(), y_line, vector
)
brackets = array.get_brackets()
if show_creation:
self.play(ShowCreation(arrow))
self.play(
ShowCreation(x_line),
Write(x_coord_start),
run_time=1
)
self.play(
ShowCreation(y_line),
Write(y_coord_start),
run_time=1
)
self.wait()
self.play(
Transform(x_coord_start, x_coord, lag_ratio=0),
Transform(y_coord_start, y_coord, lag_ratio=0),
Write(brackets, run_time=1),
)
self.wait()
self.remove(x_coord_start, y_coord_start, brackets)
self.add(array)
if clean_up:
self.clear()
self.add(*starting_mobjects)
return array, x_line, y_line
def scroll_through_patrons(self):
logo_box = Square(side_length=2.5)
logo_box.to_corner(DOWN + LEFT, buff=MED_LARGE_BUFF)
total_width = FRAME_X_RADIUS - logo_box.get_right()[0]
black_rect = Rectangle(
fill_color=BLACK,
fill_opacity=1,
stroke_width=3,
stroke_color=BLACK,
width=FRAME_WIDTH,
height=0.6 * FRAME_HEIGHT,
)
black_rect.to_edge(UP, buff=0)
line = DashedLine(FRAME_X_RADIUS * LEFT, FRAME_X_RADIUS * RIGHT)
line.move_to(ORIGIN)
thanks = TextMobject(self.thanks_words)
thanks.scale(0.9)
thanks.next_to(black_rect.get_bottom(), UP, SMALL_BUFF)
thanks.set_color(YELLOW)
underline = Line(LEFT, RIGHT)
underline.match_width(thanks)
underline.scale(1.1)
underline.next_to(thanks, DOWN, SMALL_BUFF)
thanks.add(underline)
changed_patron_names = map(
self.modify_patron_name,
self.specific_patrons,
)
patrons = VGroup(*map(
TextMobject,
changed_patron_names,
))
patrons.scale(self.patron_scale_val)
for patron in patrons:
if patron.get_width() > self.max_patron_width:
patron.set_width(self.max_patron_width)
columns = VGroup(*[
VGroup(*patrons[i::self.n_patron_columns])
for i in range(self.n_patron_columns)
])
for column in columns:
for n, name in enumerate(column):
name.shift(n * self.name_y_spacing * DOWN)
columns.arrange(
RIGHT, buff=LARGE_BUFF,
aligned_edge=UP,
)
if columns.get_width() > self.max_patron_width:
columns.set_width(total_width - 1)
thanks.to_edge(RIGHT, buff=MED_SMALL_BUFF)
columns.next_to(underline, DOWN, buff=2)
columns.generate_target()
columns.target.to_edge(DOWN, buff=2)
vect = columns.target.get_center() - columns.get_center()
distance = get_norm(vect)
wait_time = 20
always_shift(
columns,
direction=normalize(vect),
rate=(distance / wait_time)
)
self.add(columns, black_rect, line, thanks)
self.wait(wait_time)