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> Unreal Engine API Reference > Plugins > DynamicMesh > FNormalFlowRemesher > FNormalFlowRemesher::EdgeFlipWouldReduceNormalError

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FNormalFlowRemesher::EdgeFlipWouldReduceNormalError

Test to see if flipping an edge would improve "normal error".

Windows

MacOS

Linux

References

Module	DynamicMesh
Header	/Engine/Plugins/Experimental/GeometryProcessing/Source/DynamicMesh/Public/NormalFlowRemesher.h
Include	#include "NormalFlowRemesher.h"
Source	/Engine/Plugins/Experimental/GeometryProcessing/Source/DynamicMesh/Private/NormalFlowRemesher.cpp

Syntax

bool EdgeFlipWouldReduceNormalError
(
    int EdgeID,
    double BadEdgeErrorThreshold,
    double ImprovementRatioThreshold
) const

Remarks

Test to see if flipping an edge would improve "normal error". Normal error for a triangle is: 0.5 * (1.0 - TriangleNormal ProjectedNormal), where ProjectedNormal is the normal of the triangle returned by finding the closest point on ProjTarget. The normal error for an edge is the sum of errors for the edge's incident triangles.

Returns

True iff (CurrentEdgeError > BadEdgeErrorThreshold) and (NewEdgeError < ImprovementRatioThreshold * CurrentEdgeError)

Parameters

Parameter	Description
EdgeID	Edge to consider.
BadEdgeErrorThreshold	Only edges with this error or greater are candidates for flipping.
ImprovementRatioThreshold	New edge must have error less than old edge error times this ratio.

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