OverlapCircle
Checks a circle against Colliders in the PhysicsScene2D, returning the first intersection only.
Read time 6 minutesLast updated 4 days ago
Definition
- Type: Method
- Namespace: UnityEngine
- Assembly: UnityEngine.Physics2DModule
OverlapCircle(Vector2, float, int)
Checks a circle against Colliders in the PhysicsScene2D, returning the first intersection only.
public Collider2D OverlapCircle(Vector2 point, float radius, int layerMask = -5)
Parameters
Returns
Type | Description |
|---|---|
| Collider2D | The collider overlapping the circle. |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns a Collider2D that overlaps the circle or NULL if nothing overlaps.
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). Overloads of this method that use can filter the results by the options available in ContactFilter2D.
contactFilterAdditional Resources: PhysicsScene2D, LayerMask, Physics2D.DefaultRaycastLayers, Physics2D.IgnoreRaycastLayer, _queriesHitTriggers
OverlapCircle(Vector2, float, ContactFilter2D)
Checks a circle against Colliders in the PhysicsScene2D, returning the first intersection only.
public Collider2D OverlapCircle(Vector2 point, float radius, ContactFilter2D contactFilter)
Parameters
The centre of the circle.
The radius of the circle.
The contact filter used to filter the results differently, such as by layer mask and Z depth. Note that the normal angle is not used for overlap testing.
Returns
Type | Description |
|---|---|
| Collider2D | The collider overlapping the circle. |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns a Collider2D that overlaps the circle or NULL if nothing overlaps.
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). Overloads of this method that use can filter the results by the options available in ContactFilter2D.
contactFilterAdditional Resources: PhysicsScene2D, LayerMask, Physics2D.DefaultRaycastLayers, Physics2D.IgnoreRaycastLayer, _queriesHitTriggers
OverlapCircle(Vector2, float, Collider2D[], int)
Checks a circle against Colliders in the PhysicsScene2D, returning all intersections.
public int OverlapCircle(Vector2 point, float radius, Collider2D[] results, int layerMask = -5)
Parameters
The centre of the circle.
The radius of the circle.
The array to receive results. The size of the array determines the maximum number of results that can be returned.
Filter to check objects only on specific layers.
Returns
Type | Description |
|---|---|
| int | Returns the number of results placed in the |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns an array of Collider2D that overlap the circle.
The integer return value is the number of objects that intersect 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. Note that you will always get zero results if you pass an empty array.
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). Overloads of this method that use can filter the results by the options available in ContactFilter2D.
contactFilterAdditional Resources: PhysicsScene2D, LayerMask, Physics2D.DefaultRaycastLayers, Physics2D.IgnoreRaycastLayer, _queriesHitTriggers
OverlapCircle(Vector2, float, ContactFilter2D, Collider2D[])
Checks a circle against Colliders in the PhysicsScene2D, returning all intersections.
public int OverlapCircle(Vector2 point, float radius, ContactFilter2D contactFilter, Collider2D[] results)
Parameters
The centre of the circle.
The radius of the circle.
The contact filter used to filter the results differently, such as by layer mask and Z depth. Note that the normal angle is not used for overlap testing.
The array to receive results. The size of the array determines the maximum number of results that can be returned.
Returns
Type | Description |
|---|---|
| int | Returns the number of results placed in the |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns an array of Collider2D that overlap the circle.
The integer return value is the number of objects that intersect 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. Note that you will always get zero results if you pass an empty array.
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). Overloads of this method that use can filter the results by the options available in ContactFilter2D.
contactFilterAdditional Resources: PhysicsScene2D, LayerMask, Physics2D.DefaultRaycastLayers, Physics2D.IgnoreRaycastLayer, _queriesHitTriggers
OverlapCircle(Vector2, float, ContactFilter2D, List<Collider2D>)
Checks a circle against Colliders in the PhysicsScene2D, returning all intersections.
public int OverlapCircle(Vector2 point, float radius, ContactFilter2D contactFilter, List<Collider2D> results)
Parameters
The centre of the circle.
The radius of the circle.
The contact filter used to filter the results differently, such as by layer mask and Z depth. Note that the normal angle is not used for overlap testing.
The list to receive results.
Returns
Type | Description |
|---|---|
| int | Returns the number of results placed in the |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns an array of Collider2D that overlap the circle.
The integer return value is the number of results written into the list. The results list will be resized if it doesn't contain enough elements to report all the results. This prevents memory from being allocated for results when the list does not need to be resized, and improves garbage collection performance when the query is performed frequently.
resultsresultsThe results can also be filtered by the .
contactFilterOverlapCircle(Vector2, float, ContactFilter2D, Allocator)
Checks a circle against Colliders in the PhysicsScene2D, returning all intersections.
public readonly ColliderArray2D OverlapCircle(Vector2 point, float radius, ContactFilter2D contactFilter, Allocator allocator = Allocator.Temp)
Parameters
The centre of the circle.
The radius of the circle.
The contact filter used to filter the results differently, such as by layer mask and Z depth. Note that the normal angle is not used for overlap testing.
The memory allocator to use for the results. This can only be Allocator.Temp, Allocator.TempJob or Allocator.Persistent.
Returns
Type | Description |
|---|---|
| ColliderArray2D | A collection of Collider2D containing the results. The collection does not allocate any managed memory but must be disposed of. |
Remarks
An "OverlapCircle" is conceptually like looking at the Scene through a circle shape to determine what can be seen. Any Collider2D seen can be detected and reported.
This function returns a collection of Collider2D in a ColliderArray2D. The collection does not allocate any managed memory but must be disposed of.
The results can also be filtered by the .
contactFilter