| origin | 圆形在 2D 空间中的起点。 |
| radius | 圆形的半径。 |
| direction | 表示圆形方向的矢量。 |
| distance | 将圆形投射的最大距离。 |
| layerMask | 过滤器，用于仅在特定层上检测碰撞体。 |
| minDepth | 仅包括 Z 坐标（深度）大于或等于该值的对象。 |
| maxDepth | 仅包括 Z 坐标（深度）小于或等于该值的对象。 |
RaycastHit2D[] 返回的投射数量。
向场景中的碰撞体投射圆形，返回与圆形接触的所有碰撞体。
从概念上说，CircleCast 就像朝特定方向拖动一个圆形穿过场景一样。在该过程中，可以检测并报告与圆形接触的任何对象。
This function is similar to the CircleCast function but instead of detecting just the first Collider that is hit, an array of all Colliders along the path of the circle is returned. The Colliders in the array are sorted in order of distance from the origin point. The layerMask can be used to detect objects selectively only on certain layers (this allows you to apply the detection only to enemy characters, for example).
The returned RaycastHit2D returns both the point and normal of the contact where the circle would touch the Collider. It also returns the centroid where the circle would be positioned for it to contact at that point.
另请参阅：LayerMask 类、RaycastHit2D 类、CircleCast、CircleCastNonAlloc、DefaultRaycastLayers、IgnoreRaycastLayer、raycastsHitTriggers。