barnes hut

main.py

@@ -0,0 +1,147 @@
+from manim import *
+
+class DefaultTemplate(ThreeDScene):
+    def construct(self):
+        shift_pos = (-3,0,0)
+        graph_pos = (4.5,3,0)
+        start_size=7
+        top = Square(color=BLUE, side_length=start_size)
+        top.shift(shift_pos)
+
+        def entity(point,color, runtime=1):
+            dot = Dot(color=color)
+            lable = Text(f"{point[:2]}",font_size=25,color=color)
+            group = VGroup(dot,lable)
+            group.shift(shift_pos)
+            group[1].shift(tuple(x+0.35 for x in point))
+            if runtime>0:
+                self.play(Create(group[0]), run_time=runtime)
+                self.play(group[0].animate.shift(point), run_time=runtime)
+            else:
+                group[0].shift(point)
+                self.add(group[0][0])
+            return group
+
+
+
+        self.play(Create(top))
+        
+        #self.wait(1)
+
+        p1 = entity((1,2,1), BLUE_C)
+        self.play(Write(p1[1]))
+        #self.wait(1)
+        self.play(FadeOut(p1[1]))
+
+        t = Text("5kg", font_size=6)
+        t.move_to(p1[0])
+        p1_graph = VGroup(p1[0].copy(), t)
+        self.add(p1_graph)
+
+        p1.color = GRAY
+        #self.wait(10)
+        self.play(p1_graph.animate.scale(4).move_to(graph_pos))
+
+        p2 = entity((-2,1,1), BLUE_C,0.5)
+        self.play(Write(p2[1]))
+       #self.wait(1)
+        self.play(FadeOut(p2[1]))
+
+        l1 = Square(color=GREEN, side_length=start_size, grid_xstep=start_size/2, grid_ystep=start_size/2)
+        l1.set_z_index(-1)
+        l1.shift(shift_pos)
+        self.play(Create(l1))
+
+        numbs_grid = VGroup()
+
+        root_1 = p1_graph.copy()
+        root_1[0].color = GREEN
+
+        slots = VGroup()
+        for i in range(-2,2):
+            slot_text = VGroup()
+            slot = root_1[0].copy()
+            slot.color = GRAY_D
+            slot.shift((i+0.5,-1,0))
+            slot_text.add(slot)
+            slot_text.add(Text(str(i+3), color=GRAY_C,font_size=20).move_to(slot))
+            slots.add(slot_text)
+
+        root_1_1 = p1_graph.copy() 
+        self.play(Transform(root_1_1,root_1), p1_graph.animate.shift((-1.5,0,0)))
+        root_1 = root_1_1
+
+        i = 1
+        square_numbers = VGroup()
+        for y in [1,-1]:
+            for x in [-1, 1]:
+                text = Text(text=str(i))
+
+                text.move_to(l1)
+                text.shift((x*start_size/4,y*start_size/4,0))
+                arrow = Arrow(start=root_1.get_center(), end=slots[i-1].get_center(), color=BLUE)
+                self.play(Write(text),Transform(root_1.copy(),VGroup(slots[i-1],arrow)))
+                square_numbers.add(text)
+                i+=1
+
+        p1_graph.set_z_index(2)
+        self.play(p1_graph.animate.move_to(slots[1]))
+
+        
+
+        t = Text("1kg", font_size=6)
+        t.move_to(p2[0])
+        p2_graph = VGroup(p2[0].copy(), t)
+        self.add(p2_graph)
+        p2.color = GRAY
+        self.play(p2_graph.animate.scale(4).move_to(graph_pos).shift((-1.5,0,0)))
+
+        plus = Text("+")
+        plus.move_to(graph_pos).shift((-0.75,0,0))
+        t = Text("6kg", font_size=20)
+        t.move_to(root_1)
+        t.set_z_index(3)
+        self.play(Write(plus))
+        self.play(Transform(root_1[1], t))
+
+        self.play(p2_graph.animate.move_to(slots[0]), Unwrite(plus), Unwrite(square_numbers))
+        
+
+        p3 = entity((1,1,1), BLUE_C,0)
+        self.play(Write(p3[1]))
+       #self.wait(1)
+        self.play(FadeOut(p3[1]))
+
+        l2 = Square(color=ORANGE, side_length=start_size/2, grid_xstep=start_size/4, grid_ystep=start_size/4)
+        l2.shift((start_size/4,start_size/4,0))
+        l2.set_z_index(-2)
+        l2.shift(shift_pos)
+
+        self.play(Create(l2))
+
+        self.wait(3)
+
+        t = Text("8kg", font_size=6)
+        t.move_to(p3[0])
+        p3_graph = VGroup(p3[0].copy(), t)
+        p3.color = GRAY
+        self.play(p3_graph.animate.scale(4).move_to(graph_pos).shift((-1.5,0,0)))
+
+        t = Text("14kg", font_size=20)
+        t.move_to(root_1)
+        t.set_z_index(3)
+
+        self.play(Write(plus))
+        self.play(Transform(root_1[1], t))
+
+        self.play(p3_graph.animate.move_to(p2_graph).shift((-1.5,0,0)))
+
+        plus_2 = Text("+")
+        plus_2.move_to(p2_graph).shift((-0.75,0,0))
+        self.play(Write(plus_2))
+
+        root_2 = p1_graph.copy()
+        root_2[0].color = ORANGE
+
+        self.play(Transform(VGroup(plus_2,p1_graph), root_2))
+