UKismetMathLibrary::Box_Intersects
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPureUFUNCTION
Description
Returns true if two axis-aligned bounding boxes overlap, including the case where they only share a boundary face or edge. Use this for broad-phase overlap rejection before running expensive narrow-phase collision checks.
Caveats & Gotchas
- • Uses **closed bounds** — two boxes that merely touch along a shared face or edge (coincident borders) are considered to intersect. This is the opposite convention from Box_IsPointInside which uses open bounds. Be deliberate when mixing both in the same system.
- • A zero-volume degenerate box (e.g. a line or plane) can still intersect another box under closed-bound rules. If you need to reject degenerate inputs, check FBox::GetVolume() > 0 before calling.
Signature
static ENGINE_API bool Box_Intersects(const FBox& A, const FBox& B);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | const FBox& | The first bounding box. | — |
| B | const FBox& | The second bounding box. | — |
Return Type
bool Example
Broad-phase AABB check before a detailed overlap query C++
FBox BoundsA = ActorA->GetComponentsBoundingBox();
FBox BoundsB = ActorB->GetComponentsBoundingBox();
if (UKismetMathLibrary::Box_Intersects(BoundsA, BoundsB))
{
// Boxes overlap — worth running the narrow-phase check
RunDetailedOverlapTest(ActorA, ActorB);
}See Also
Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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