def get_det_text(
matrix: Matrix,
determinant: int | str | None = None,
background_rect: bool = False,
initial_scale_factor: int = 2
) -> VGroup:
parens = Tex("(", ")")
parens.scale(initial_scale_factor)
parens.stretch_to_fit_height(matrix.get_height())
l_paren, r_paren = parens.split()
l_paren.next_to(matrix, LEFT, buff=0.1)
r_paren.next_to(matrix, RIGHT, buff=0.1)
det = TexText("det")
det.scale(initial_scale_factor)
det.next_to(l_paren, LEFT, buff=0.1)
if background_rect:
det.add_background_rectangle()
det_text = VGroup(det, l_paren, r_paren)
if determinant is not None:
eq = Tex("=")
eq.next_to(r_paren, RIGHT, buff=0.1)
result = Tex(str(determinant))
result.next_to(eq, RIGHT, buff=0.2)
det_text.add(eq, result)
return det_text
def setup(self):
super().setup()
frame = self.camera.frame
frame.shift(DOWN)
self.logo = Logo()
name = TexText("3Blue1Brown")
name.scale(2.5)
name.next_to(self.logo, DOWN, buff=MED_LARGE_BUFF)
name.set_gloss(0.2)
self.channel_name = name
def construct(self):
words = TexText(
"3",
"Blue",
"1",
"Brown",
)
words.scale(2)
words[::2].scale(1.2)
buff = 0.2
words.arrange(
DOWN,
buff=buff,
aligned_edge=LEFT,
)
words[0].match_x(words[1][0])
words[2].match_x(words[3][0])
self.add(words)
logo = Logo()
logo.next_to(words, LEFT)
self.add(logo)
VGroup(logo, words).center()
def construct(self):
# Add title
title = self.title = TexText("Clicky Stuffs")
title.scale(1.5)
title.to_edge(UP, buff=MED_SMALL_BUFF)
pi_creatures = VGroup(Randolph(), Mortimer())
for pi, vect in zip(pi_creatures, [LEFT, RIGHT]):
pi.set_height(title.get_height())
pi.change_mode("thinking")
pi.look(DOWN)
pi.next_to(title, vect, buff=MED_LARGE_BUFF)
self.add(title, pi_creatures)
# Set the top of the screen
logo_box = Square(side_length=2.5)
logo_box.to_corner(DOWN + LEFT, buff=MED_LARGE_BUFF)
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)
# Add thanks
thanks = TexText(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)
# Build name list
file_name = os.path.join(get_directories()["data"], "patrons.txt")
with open(file_name, "r") as fp:
names = [
self.modify_patron_name(name.strip())
for name in fp.readlines()
]
if self.randomize_order:
random.shuffle(names)
else:
names.sort()
name_labels = VGroup(*map(TexText, names))
name_labels.scale(self.patron_scale_val)
for label in name_labels:
if label.get_width() > self.max_patron_width:
label.set_width(self.max_patron_width)
columns = VGroup(*[
VGroup(*name_labels[i::self.n_patron_columns])
for i in range(self.n_patron_columns)
])
column_x_spacing = 0.5 + max([c.get_width() for c in columns])
for i, column in enumerate(columns):
for n, name in enumerate(column):
name.shift(n * self.name_y_spacing * DOWN)
name.align_to(ORIGIN, LEFT)
column.move_to(i * column_x_spacing * RIGHT, UL)
columns.center()
max_width = FRAME_WIDTH - 1
if columns.get_width() > max_width:
columns.set_width(max_width)
underline.match_width(columns)
columns.next_to(underline, DOWN, buff=3)
# Set movement
columns.generate_target()
distance = columns.get_height() + 2
wait_time = self.scroll_time
frame = self.camera.frame
frame_shift = ApplyMethod(
frame.shift, distance * DOWN,
run_time=wait_time,
rate_func=linear,
)
blink_anims = []
blank_mob = Mobject()
for x in range(wait_time):
if random.random() < 0.25:
blink_anims.append(Blink(random.choice(pi_creatures)))
else:
blink_anims.append(Animation(blank_mob))
blinks = Succession(*blink_anims)
static_group = VGroup(black_rect, line, thanks, pi_creatures, title)
static_group.fix_in_frame()
self.add(columns, static_group)
self.play(frame_shift, blinks)
