| point | 円の中心 |
| radius | 円の半径 |
| results | 結果を受け取る配列 |
| layerMask | 特定レイヤーのオブジェクトのみを判定するフィルター |
| minDepth | この値以上の Z 座標（深度）を持つオブジェクトのみを含みます。 |
| maxDepth | この値以下の Z 座標（深度）を持つオブジェクトのみを含みます。 |
int
Returns the number of results placed in the results array.
円の領域にあるコライダーのリストを取得します
This function is similar to OverlapCircleAll except that the results are returned in the supplied array.
The integer return value is the number of objects that fall within the circle and which could be stored in the supplied array given its length. The results array will not be resized if it doesn't contain enough elements to report all the results.
The significance of this is that no memory is allocated for the results and so garbage collection performance is improved when the check is performed frequently.
See Also: OverlapCircle, OverlapCircleAll.