class ZoomedScene(Scene):
CONFIG = {
"zoomed_canvas_space_shape": (3, 3),
"zoomed_canvas_center": None,
"zoomed_canvas_corner": UP + RIGHT,
"zoomed_camera_background": None,
"zoom_factor": 6,
"square_color": WHITE,
"zoom_activated": False,
}
def activate_zooming(self):
self.generate_big_rectangle()
self.setup_zoomed_canvas()
self.setup_zoomed_camera()
self.zoom_activated = True
def disactivate_zooming(self):
self.remove(self.big_rectangle, self.little_rectangle)
self.zoom_activated = False
def get_zoomed_camera_mobject(self):
return self.little_rectangle
def get_zoomed_screen(self):
return self.big_rectangle
def generate_big_rectangle(self):
height, width = self.zoomed_canvas_space_shape
self.big_rectangle = Rectangle(height=height,
width=width,
color=self.square_color)
if self.zoomed_canvas_center is not None:
self.big_rectangle.shift(self.zoomed_canvas_center)
elif self.zoomed_canvas_corner is not None:
self.big_rectangle.to_corner(self.zoomed_canvas_corner)
self.add(self.big_rectangle)
def setup_zoomed_canvas(self):
upper_left = self.big_rectangle.get_corner(UP + LEFT)
lower_right = self.big_rectangle.get_corner(DOWN + RIGHT)
pixel_coords = self.camera.points_to_pixel_coords(
np.array([upper_left, lower_right]))
self.zoomed_canvas_pixel_indices = pixel_coords
(up, left), (down, right) = pixel_coords
self.zoomed_canvas_pixel_shape = (down - up, right - left)
def setup_zoomed_camera(self):
self.little_rectangle = self.big_rectangle.copy()
self.little_rectangle.scale(1. / self.zoom_factor)
self.little_rectangle.center()
self.zoomed_camera = MovingCamera(
self.little_rectangle,
pixel_shape=self.zoomed_canvas_pixel_shape,
background=self.zoomed_camera_background)
self.add(self.little_rectangle)
#TODO, is there a better way to hanld this?
self.zoomed_camera.adjusted_thickness = lambda x: x
def get_frame(self):
frame = Scene.get_frame(self)
if self.zoom_activated:
(up, left), (down, right) = self.zoomed_canvas_pixel_indices
frame[left:right, up:down, :] = self.zoomed_camera.get_image()
return frame
def update_frame(self, *args, **kwargs):
Scene.update_frame(self, *args, **kwargs)
if self.zoom_activated:
self.zoomed_camera.reset()
self.zoomed_camera.capture_mobjects(self.mobjects)
class ZoomedScene(Scene):
"""
Move around self.little_rectangle to determine
which part of the screen is zoomed in on.
"""
CONFIG = {
"zoomed_canvas_space_shape": (3, 3),
"zoomed_canvas_center": None,
"zoomed_canvas_corner": UP + RIGHT,
"zoomed_canvas_corner_buff": DEFAULT_MOBJECT_TO_EDGE_BUFFER,
"zoomed_camera_background": None,
"little_rectangle_start_position": ORIGIN,
"zoom_factor": 6,
"square_color": WHITE,
"zoom_activated": False,
}
def activate_zooming(self):
self.generate_big_rectangle()
self.setup_zoomed_canvas()
self.setup_zoomed_camera()
self.zoom_activated = True
def animate_activate_zooming(self):
self.activate_zooming()
self.play(*map(FadeIn, [self.little_rectangle, self.big_rectangle]))
def disactivate_zooming(self):
self.remove(self.big_rectangle, self.little_rectangle)
self.zoom_activated = False
def get_zoomed_camera_mobject(self):
return self.little_rectangle
def get_zoomed_screen(self):
return self.big_rectangle
def generate_big_rectangle(self):
height, width = self.zoomed_canvas_space_shape
self.big_rectangle = Rectangle(height=height,
width=width,
color=self.square_color)
if self.zoomed_canvas_center is not None:
self.big_rectangle.shift(self.zoomed_canvas_center)
elif self.zoomed_canvas_corner is not None:
self.big_rectangle.to_corner(self.zoomed_canvas_corner,
buff=self.zoomed_canvas_corner_buff)
self.add(self.big_rectangle)
def setup_zoomed_canvas(self):
upper_left = self.big_rectangle.get_corner(UP + LEFT)
lower_right = self.big_rectangle.get_corner(DOWN + RIGHT)
pixel_coords = self.camera.points_to_pixel_coords(
np.array([upper_left, lower_right]))
self.zoomed_canvas_pixel_indices = pixel_coords
(up, left), (down, right) = pixel_coords
self.zoomed_canvas_pixel_shape = (
right - left,
down - up,
)
def setup_zoomed_camera(self):
self.little_rectangle = self.big_rectangle.copy()
self.little_rectangle.scale(1. / self.zoom_factor)
self.little_rectangle.move_to(self.little_rectangle_start_position)
self.zoomed_camera = MovingCamera(
self.little_rectangle,
pixel_shape=self.zoomed_canvas_pixel_shape,
background=self.zoomed_camera_background)
self.add(self.little_rectangle)
#TODO, is there a better way to hanld this?
self.zoomed_camera.adjusted_thickness = lambda x: x
def get_frame(self):
frame = Scene.get_frame(self)
if self.zoom_activated:
(up, left), (down, right) = self.zoomed_canvas_pixel_indices
frame[left:right, up:down, :] = self.zoomed_camera.get_image()
return frame
def set_camera_pixel_array(self, pixel_array):
self.camera.set_pixel_array(pixel_array)
if self.zoom_activated:
(up, left), (down, right) = self.zoomed_canvas_pixel_indices
self.zoomed_camera.set_pixel_array(pixel_array[left:right,
up:down])
def set_camera_background(self, background):
self.set_camera_pixel_array(self, background)
#TODO, check this...
def reset_camera(self):
self.camera.reset()
if self.zoom_activated:
self.zoomed_camera.reset()
def capture_mobjects_in_camera(self, mobjects, **kwargs):
self.camera.capture_mobjects(mobjects, **kwargs)
if self.zoom_activated:
if self.big_rectangle in mobjects:
mobjects = list(mobjects)
mobjects.remove(self.big_rectangle)
self.zoomed_camera.capture_mobjects(mobjects, **kwargs)
def separate_moving_and_static_mobjects(self, *animations):
moving_mobjects, static_mobjects = Scene.separate_moving_and_static_mobjects(
self, *animations)
if self.zoom_activated and self.little_rectangle in moving_mobjects:
# When the camera is moving, so is everything,
return self.get_mobjects(), []
else:
return moving_mobjects, static_mobjects
class ZoomedScene(Scene):
CONFIG = {
"zoomed_canvas_space_shape" : (3, 3),
"zoomed_canvas_center" : None,
"zoomed_canvas_corner" : UP+RIGHT,
"zoomed_camera_background" : None,
"zoom_factor" : 6,
"square_color" : WHITE,
"zoom_activated" : False,
}
def activate_zooming(self):
self.generate_big_rectangle()
self.setup_zoomed_canvas()
self.setup_zoomed_camera()
self.zoom_activated = True
def disactivate_zooming(self):
self.remove(self.big_rectangle, self.little_rectangle)
self.zoom_activated = False
def get_zoomed_camera_mobject(self):
return self.little_rectangle
def get_zoomed_screen(self):
return self.big_rectangle
def generate_big_rectangle(self):
height, width = self.zoomed_canvas_space_shape
self.big_rectangle = Rectangle(
height = height,
width = width,
color = self.square_color
)
if self.zoomed_canvas_center is not None:
self.big_rectangle.shift(self.zoomed_canvas_center)
elif self.zoomed_canvas_corner is not None:
self.big_rectangle.to_corner(self.zoomed_canvas_corner)
self.add(self.big_rectangle)
def setup_zoomed_canvas(self):
upper_left = self.big_rectangle.get_corner(UP+LEFT)
lower_right = self.big_rectangle.get_corner(DOWN+RIGHT)
pixel_coords = self.camera.points_to_pixel_coords(
np.array([upper_left, lower_right])
)
self.zoomed_canvas_pixel_indices = pixel_coords
(up, left), (down, right) = pixel_coords
self.zoomed_canvas_pixel_shape = (
down-up,
right-left
)
def setup_zoomed_camera(self):
self.little_rectangle = self.big_rectangle.copy()
self.little_rectangle.scale(1./self.zoom_factor)
self.little_rectangle.center()
self.zoomed_camera = MovingCamera(
self.little_rectangle,
pixel_shape = self.zoomed_canvas_pixel_shape,
background = self.zoomed_camera_background
)
self.add(self.little_rectangle)
#TODO, is there a better way to hanld this?
self.zoomed_camera.adjusted_thickness = lambda x : x
def get_frame(self):
frame = Scene.get_frame(self)
if self.zoom_activated:
(up, left), (down, right) = self.zoomed_canvas_pixel_indices
frame[left:right, up:down, :] = self.zoomed_camera.get_image()
return frame
def update_frame(self, *args, **kwargs):
Scene.update_frame(self, *args, **kwargs)
if self.zoom_activated:
self.zoomed_camera.reset()
self.zoomed_camera.capture_mobjects(self.mobjects)