FGeometry

struct SlateCore Blueprint Since 4.0

#include "Layout/Geometry.h"

Description

Represents the position, size, and absolute position of a Slate widget in the widget hierarchy. Geometries encode both a local-space size and the accumulated transforms needed to place the widget in absolute (screen or window) space.

Caveats & Gotchas

• Absolute coordinates can be either desktop space or window space depending on where the root of the hierarchy sits — never assume one without knowing your context.
• The public fields Size, Scale, and AbsolutePosition are deprecated and const-locked since UE 4.x to prevent accidental mutation that would silently break the cached render transform. Always use the accessor methods (GetLocalSize, GetAbsoluteSize, GetAccumulatedLayoutTransform) instead.
• FGeometry is POD (TIsPODType<FGeometry>::Value == true), so it can be memcpy'd, but the private AccumulatedRenderTransform must stay in sync — never construct or mutate one manually outside of MakeRoot/MakeChild.

Functions (7)

Transform 6 Utility 1

Transform

6 ▼

Access	Type	Name	Description
public	function	FGeometry::AbsoluteToLocal	Transforms a point from absolute space into this widget's local space by inverting the accumulated render transform.
public	function	FGeometry::GetAbsoluteSize	Returns the size of the geometry transformed into absolute space by applying the accumulated render transform to the local size vector.
public	function	FGeometry::LocalToAbsolute	Transforms a point from this widget's local space into absolute (screen or window) space by applying the accumulated render transform.
public	function	FGeometry::GetAbsolutePositionAtCoordinates	Returns the absolute position of a point on the widget surface identified by normalized (0–1) local coordinates, accounting for the full accumulated render transform.
public	function	FGeometry::GetLayoutBoundingRect	Returns the axis-aligned bounding rectangle of this geometry in absolute space, computed using the accumulated layout transform (without render transforms).
public	function	FGeometry::GetRenderBoundingRect	Returns the axis-aligned bounding rectangle of this geometry in absolute space computed using the full accumulated render transform, including any rotation or skew.

Utility

1 ▼

Access	Type	Name	Description
public	function	FGeometry::IsUnderLocation	Returns true if the given absolute coordinate falls within the bounds of this geometry, correctly accounting for render transforms including rotation and skew.

Properties

Access	Type	Name	Description
public	property	FGeometry::AbsolutePosition deprecated	Position of the geometry in absolute space, equivalent to the translation of the accumulated layout transform.
public	property	FGeometry::Scale deprecated	Scale in absolute space, equivalent to the scale component of the accumulated layout transform.
public	property	FGeometry::Size deprecated	Size of the geometry in local space.

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—
5.5	stable	—
5.2	stable	FDeprecateVector2D migration began; FVector2f used internally.

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