mirror of
https://github.com/3b1b/manim.git
synced 2025-07-30 05:24:22 +08:00
139 lines
4.6 KiB
Python
139 lines
4.6 KiB
Python
import numpy as np
|
|
|
|
from .scene import Scene
|
|
from animation.transform import FadeIn
|
|
from mobject.mobject import Mobject
|
|
from topics.geometry import Rectangle
|
|
from camera.camera import Camera
|
|
from camera.camera import MovingCamera
|
|
|
|
from constants import *
|
|
|
|
class ZoomedScene(Scene):
|
|
"""
|
|
Move around self.little_rectangle to determine
|
|
which part of the screen is zoomed in on.
|
|
"""
|
|
CONFIG = {
|
|
"zoomed_canvas_frame_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_frame_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 get_moving_mobjects(self, *animations):
|
|
moving_mobjects = Scene.get_moving_mobjects(self, *animations)
|
|
if self.zoom_activated and self.little_rectangle in moving_mobjects:
|
|
# When the camera is moving, so is everything,
|
|
return self.mobjects
|
|
else:
|
|
return moving_mobjects
|
|
|
|
|
|
|
|
|
|
|