UKismetMathLibrary::Matrix_GetFrustumLeftPlane
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPure
Description
Extracts the left clipping plane from a view-projection matrix. Returns false if extraction fails.
Caveats & Gotchas
- • The plane normal points inward (into the frustum), so a positive PlaneDot result means the point is inside the frustum on this side.
- • Assumes a row-major view-projection matrix laid out in the UE convention (right-handed, row vectors); a column-major matrix will produce a wrong result.
Signature
static UE_INL_API bool Matrix_GetFrustumLeftPlane(const FMatrix& M, FPlane& OutPlane)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| M | const FMatrix& | The view-projection matrix to extract the left frustum plane from. | — |
| OutPlane | FPlane& | The extracted left plane of the frustum. | — |
Return Type
bool Example
Manual frustum culling against left plane C++
FPlane LeftPlane;
if (UKismetMathLibrary::Matrix_GetFrustumLeftPlane(ViewProjMatrix, LeftPlane))
{
bool bInsideLeft = LeftPlane.PlaneDot(TestPoint) >= 0.0f;
}See Also
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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