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> Unreal Engine API Reference > Runtime > Engine > Engine > FPoly > FPoly::CalcNormal

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FPoly::CalcNormal

Compute normal of an [FPoly](API\Runtime\Engine\Engine\FPoly).

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References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Classes/Engine/Polys.h
Include	#include "Engine/Polys.h"
Source	/Engine/Source/Runtime/Engine/Private/Polygon.cpp

Syntax

int32 CalcNormal
(
bool bSilent
)

Remarks

Compute normal of an FPoly. Works even if FPoly has 180-degree-angled sides (which are often created during T-joint elimination). Returns nonzero result (plus sets normal vector to zero) if a problem occurs.

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