防止box2d玩家在半空中压向墙壁
我已经设置了一个带有键盘控制播放器的 box2d 世界。玩家可以行走和跳跃。如何防止玩家在跳跃和按方向键朝某个物体时“粘”在墙上？
I have setup a box2d world with a keyboard controlled player. The player can walk and jump. How do I prevent the player from "sticking" to walls while jumping and pressing the directional key towards an object?
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将玩家身体作为一组身体（在左侧和右侧添加固定装置）？并将摩擦力设置为0
Make player body as group of bodies (add fixtures at left and right sides)? and set friction to 0
您需要改变影响角色身体的方式。你用什么方法让他左/右移动？尝试在身体上应用 applyLinearImpulse，并确保身体定义中的摩擦力不是很高。
You need to change the way that you're affecting the body of the character. What method are you using to move him left/right? Try applyLinearImpulse on the body and also ensure that your friction in the body definition isn't really high.
您可以将播放器的摩擦力设置为 0，然后在每个循环中执行一个函数，当用户未按下移动键时，将 X 中的速度设置为零。在检查事件的方法中，您应该添加：
在您的player.stop()中，您应该执行类似的操作：
这将使您的玩家与滑冰平台的摩擦力为0
You can set the friction of your player to 0 and then execute in every loop a function that set your velocity in X to zero when user is not pressing the movement keys. In your method to check events you should add:
And in your player.stop() you should do something like:
This will make your player has friction 0 with platforms with the iceskating
这一切都取决于你的物理学目前的运作方式，因为有很多可能性。在我看来，最简单的方法是将所示的身体分成 4 个边界墙（上、左、右、下），并且只让可行走的地板（顶部）产生摩擦。
It all depends on how your physics is currently working, as there are a lot of possibilities. The simplest way to do it in my opinion, is to split the shown body into 4 boundary walls (top, left, right, bottom) and only have the walk-able floor (top) produce friction.