JavaScript，Matter.js : Disable collision for one body

Question

如标题中所述，我正在寻找一种方法来禁用 Matter.js 中的每次 body 碰撞。它应该仍然可以与约束链接，并且应该有可能在一段时间后再次启用碰撞。有没有办法做到这一点？难点在于，该对象不应与任何其他对象发生碰撞，但所有其他对象应相互碰撞。

Answer 1

您可以像这样使用碰撞过滤器:

const body = Matter.Bodies.rectangle(100, 100, 50, 50);
// turns off collisions
body.collisionFilter = {
  'group': -1,
  'category': 2,
  'mask': 0,
};

来自文档:

If the two bodies have the same non-zero value of collisionFilter.group, they will always collide if the value is positive, and they will never collide if the value is negative.

Using the category/mask rules, two bodies A and B collide if each includes the other's category in its mask, i.e. (categoryA & maskB) !== 0 and (categoryB & maskA) !== 0 are both true.