> For the complete documentation index, see [llms.txt](https://docs.lightact.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lightact.com/layers-and-layouts/layer-layouts/variables.md). # Variables There are 2 categories of variables: * **Layer variables**: accessible only within one layer * **Global variables**: accessible throughout LightAct and also WebUI. Regardless of this category they have some things in common. ## All variables hold data or content

For example, every variable can hold only one type of a information. When we say information, we mean either data (a number, for example) or texture (also referred as content). Below are 2 examples:

*Resolution* variable always holds 2 whole numbers (integer) representing **resolution**.

*Texture* variable holds a **texture**. ### Types of variables Each variable type therefore holds a different type of data. The list is explained below:

Variable type	Description	Example
Float	Number with a decimal point	1.6314
Integer	Whole number	5
Boolean	True or false (represented as a checkbox)	True
String	Text	Hello world!
Color	RGBA representation of color where 0 is 0 and 1 is full	[1.0,1.0,1.0,1.0] (white)
Texture	A pointer to a texture in the VRAM of the GPU
OpenCV	An image for computer vision processing
Vec2	A vector of 2 floats	[1.231, 10.231]
Vec3	A vector of 3 floats	[543.12,-1.231,5.000]
Vec2 array	An array of Vec2	NA
Vec3 array	An array of Vec2	NA
Transform	A vector of: Vec3 representing Position, Vec3 representing Rotation, Vec3 representing Scale	NA
Transform array	An array of transforms	NA
Resolution	A vector of 2 integers representing resolution	[1920,1080]
Timecode	A HMSF representation of time	[00:02:12:32]
Canvas	A reference to a canvas (obsolete)	NA
Mapping	A reference to a mapping	NA
Viewport object	A reference to a viewport object	NA
LA Object	A reference to all kinds of objects in LightAct: Timeline, Section, Layer, Marker, Video output	NA
Device	A reference to a Device node	NA
Camera properties	An array of values representing properties of a camera: Position, Rotation, FOV, Aspect ratio, Near clip, Far clip	NA
Asset	A reference to an Asset. There are several types: Video, 3D model, Audio, Notch block, Unreal, TouchDesigner component	NA
Event	A Lifeline type	NA

## All variables can be referenced in Layouts

Almost every variable type has a corresponding connection type represented by the same color. These connections serve to pass the value of the variable between different nodes in the Layout.