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> Unreal Engine Blueprint API Reference > Math > Vector 4 > Vector 4 Mirror by Vector 3

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Vector 4 Mirror by Vector 3

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Given a direction vector and a surface normal, returns the vector reflected across the surface normal. Produces a result like shining a laser at a mirror! The W element is ignored.

Target is Kismet Math Library

Vector 4 Mirror by Vector 3

Direction

Surface Normal

Return Value

Inputs

	Direction Vector 4 Structure (by ref)	Direction vector the ray is coming from.
	Surface Normal Vector 4 Structure (by ref)	A normal of the surface the ray should be reflected on.

Outputs

Return Value

Vector 4 Structure

Reflected vector.

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