why Math.max(...)?

Question about the task

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I already solved the task. I get how and why we calculate the distance between two points - but I don't understand one given part of the code: why we check if the distance is less than the bigger radius of the two objects? Shouldn't we check if the distance is less than the both radiuses added together? Otherwise we would just know if one object collides with the centerpoint of the other, right?

distance_between_objects <= max(radius_of_the_first_object, radius_of_the_second_object)

I appreciate your help.

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Jurij Thmsn

Level 29 , Flensburg, Germany

19 October 2021, 14:31

Edit : I read the task Conditions etc again - its just the way they defined the collision algorithm (quote) Because we're treating objects as circles for convenience, I propose the following collision-detection algorithm: If the center of the circle of one object lies within the circle of another, then we'll conclude that they've collided. It's probably because the algorithm is also used for square objects an this way it applies better. I still leave the question here, in case someone else wonders. If you have another explanation or ideas, please let me know.