[Mobject grouping] Grouping squares inside a loop. #manim #square #loop #animate #vgroup

20220920_squaresum.py

# https://discord.com/channels/581738731934056449/1021822343120687135/1021843567905353788

from manim import *

class test17(Scene):
    def construct(self):
        baselen = 0.5
        max_n   = 10
        origo   = 3*LEFT+3*DOWN
        sq = Square(side_length=baselen)
        triangle = VGroup()  # create an empty group

        for x in np.arange(1, max_n+1, 1):
            for y in np.arange(1, x+1, 1):

                triangle += sq.copy().move_to(x*baselen*RIGHT + y*baselen*UP + origo) 

                self.add(triangle[-1]) # retrieve latest added sq and Create

        # now make a copy of the triangle
        new_triangle = triangle.copy().set_color(RED) 

        self.play(Create(new_triangle))

        self.play(Rotate(new_triangle, 720*DEGREES), run_time=4) 

readme.md

https://discord.com/channels/581738731934056449/1021822343120687135/1021843567905353788