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28 lines
951 B
28 lines
951 B
3 months ago
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from manim import *
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class FollowingGraphCamera(MovingCameraScene):
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def construct(self):
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self.camera.frame.save_state()
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# create the axes and the curve
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ax = Axes(x_range=[-1, 10], y_range=[-1, 10])
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graph = ax.plot(lambda x: np.sin(x), color=BLUE, x_range=[0, 3 * PI])
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# create dots based on the graph
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moving_dot = Dot(ax.i2gp(graph.t_min, graph), color=ORANGE)
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dot_1 = Dot(ax.i2gp(graph.t_min, graph))
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dot_2 = Dot(ax.i2gp(graph.t_max, graph))
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self.add(ax, graph, dot_1, dot_2, moving_dot)
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self.play(self.camera.frame.animate.scale(0.5).move_to(moving_dot))
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def update_curve(mob):
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mob.move_to(moving_dot.get_center())
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self.camera.frame.add_updater(update_curve)
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self.play(MoveAlongPath(moving_dot, graph, rate_func=linear))
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self.camera.frame.remove_updater(update_curve)
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self.play(Restore(self.camera.frame))
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