UKismetMathLibrary::Matrix_GetFrustumNearPlane

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Extracts the near clipping plane from a view-projection matrix. Returns false if the plane extraction fails.

Caveats & Gotchas

• The matrix must represent a combined View * Projection matrix, not a standalone view or projection matrix — passing a model matrix will yield nonsense results.
• Always check the return value; a degenerate or near-zero projection matrix can cause extraction to fail, returning an invalid plane.

Signature

static UE_INL_API bool Matrix_GetFrustumNearPlane(const FMatrix& M, FPlane& OutPlane)

Parameters

Name	Type	Description	Default
M	const FMatrix&	The matrix to extract the frustum plane from. Must represent a View Projection Matrix.	—
OutPlane	FPlane&	The extracted near plane of the frustum, in world space.	—

Return Type

bool

Example

Extract near plane from camera projection C++

FMatrix ViewProjectionMatrix = ViewMatrix * ProjectionMatrix;
FPlane NearPlane;
if (UKismetMathLibrary::Matrix_GetFrustumNearPlane(ViewProjectionMatrix, NearPlane))
{
    // Use NearPlane for frustum culling or clipping
    UE_LOG(LogTemp, Log, TEXT("Near plane W: %f"), NearPlane.W);
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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