BadApple | 用 JavaScript 在浏览器中以各种姿势看 BadApple!! | Runtime Evironment library

The code you're given is well-written, so first go over it and try to understand what each class and method do even if you don't understand how they do what they do.

can someone please help me as to what I should correct in this code?

The instructions on what you're supposed to correct and where are also clear:

• ※1 is where you need to implement the new player AI logic such that it conforms to the behavior you were given.
• ※2 is just a simple replacement of the old player AI logic implementing class PlayerAIDummyHead with the new one you wrote in ※1, MyPlayerAI. It's explicitly given to you in the comment on that line.

To solve ※1, first understand what the current behavior is. PlayerAIDummyHead accelerates the player by an amount, and in a direction, which is dependent to the current distance between it and A. This calculation is done in a loop, so the acceleration changes on every iteration according to the result the previous acceleration gave.

This movement behavior is problematic in the sense that it does not take into account the location of B or the size of the stage, both of which are given the the computing method. In your MyPlayerAI's next method, try to improve the math bit by bit to make a more desirable path towards A. That's your main task: improve the math that calculates the route.

Any help/pointers is extremely appreciated.

Just a few ideas you can play around with:

• Make the player take a direct route towards A.
• Aim for having 0 velocity when you reach A. This will avoid going out of stage when you can't stop in time to reverse direction.
• See if B lies in the path of that direct route. If so, move sideways or diagonally until it's not in that path.
• Avoid going out of bounds when maneuvering.

I understand that the acceleration changes on every iteration but I can't really make out how it's used to calculate the next step the player is supposed to take.

The acceleration changes the velocity (speed):

I think that the problem is coming from the base class.

When you used the BaseFruit and used it as base class for the Apple-Class, python will assign any value that exist in the Apple-Class and the BaseFruit-Class directly to the BaseFruit Class. Since both 'apples' are based on the same Base Class, they share the values that come from this class.

When you set the saddestfuture as function to be executed you set it kind of 'globally' for all objects based on the BaseFruit-Class.

You need a line

To replace one string with another in a file, especially where you are changing the length of the string, you are going to find it easiest if you load the whole file into memory, perform the change there, then write it back out again.