[autozoomed scene] A scene which adapts the camera frame to show all mobjects. #manim #movingcamerascene #frame #zoom

20241001_autozoom.py

# https://discord.com/channels/581738731934056449/1290678443905650819/1290678443905650819

from manim import *

class autozoom(MovingCameraScene):
    def construct(self):
        sq = Square()
        circ = Circle()
        self.add(sq,circ)
        self.add(self.camera.frame)
        def zoomUpdater(mobj):
            self.mobjects.remove(mobj) # camera frame must not be in list
            boundary_box = Group(*self.mobjects)
            bb_aspect = boundary_box.width/boundary_box.height
            camera_aspect = mobj.width/mobj.height
            if bb_aspect >= camera_aspect:
                mobj.scale_to_fit_width(boundary_box.width*1.05)
            else:
                mobj.scale_to_fit_height(boundary_box.height*1.05)
            mobj.move_to(boundary_box.get_center())
            self.add(mobj)
        self.camera.frame.add_updater(zoomUpdater, call_updater=True)
        self.wait()
        self.play(circ.animate.scale(3))
        self.wait()
        self.play(sq.animate.shift(8*RIGHT))
        self.wait()
        c2 = Circle().shift(4*LEFT)
        self.play(Create(c2))
        self.wait()