2D 胶囊碰撞体 (Capsule Collider 2D)

The Capsule Collider 2D is a Collider that interacts with the 2D physics system. The capsule shape has no vertex corners and has a continuous round circumference. This shape allows the Capsule Collider 2D to not get easily caught in the corners of other Colliders. The capsule shape is considered solid and not hollow, which means any other Collider 2Ds that are inside the Capsule Collider 2D are considered to be in contact with the Collider and are forced out of it over time.

The settings that define the Capsule Collider 2D are Size and Direction. Both the Size and Direction properties refer to X and Y (horizontal and vertical, respectively) in the local space of the Capsule Collider 2D, and not in world-space.

A typical way to set up the Capsule Collider 2D is to set the Size to match the Direction. For example, if the Capsule Collider 2D’s Direction is Vertical, the Size of X is 0.5 and the Size of Y is 1, this makes the vertical direction capsule taller, rather than wider.

In the example below, the X and Y are represented by the yellow lines.

胶囊体配置示例

可使用不同的配置来更改 2D 胶囊碰撞体。以下是一些示例。

Note that when the X and Y of the Size property are the same, the Capsule Collider 2D always approximates to a circle.

Note: A known issue in the 2D physics system is that when a GameObject moves across multiple Colliders, one or several of the Colliders may register a collision between the Colliders. This may occur even when the Colliders are perfectly aligned. This collision can cause the Collider to slow down or stop.

While constructing a surface with the Capsule Collider 2D can help reduce this problem, it is recommeneded to use a single Collider rather than multiple Colliders for a surface, such as the Edge Collider 2D.