Unity Script Reference:

static function OverlapCircleNonAlloc(point: Vector2, radius: float, results: Collider2D[], layerMask: int = DefaultRaycastLayers, minDepth: float = -Mathf.Infinity, maxDepth: float = Mathf.Infinity): int;

static int OverlapCircleNonAlloc(Vector2 point, float radius, Collider2D[] results, int layerMask = DefaultRaycastLayers, float minDepth = -Mathf.Infinity, float maxDepth = Mathf.Infinity);

static def OverlapCircleNonAlloc(point as Vector2, radius as float, results as Collider2D[], layerMask as int = DefaultRaycastLayers, minDepth as float = -Mathf.Infinity, maxDepth as float = Mathf.Infinity) as int

Parameters

minDepth	Only include objects with a Z coordinate (depth) greater than this value.
maxDepth	Only include objects with a Z coordinate (depth) less than this value.
point	Center of the circle.
radius	Radius of the circle.
results	Array to receive results.
layerMask	Filter to check objects only on specific layers.

Description

Get a list of all colliders that fall within a circular area.

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 (possibly zero) but 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.