# Callbacks

## Functions

### add

Adds a function to a callback

`callbacks:add( name, function )`

| Parameter | Data type |          Description          |
| :-------: | :-------: | :---------------------------: |
|    name   |   string  |        name of callback       |
|  function |  function | function for callback to call |

## Callbacks

### paint

called every frame.

used for rendering. See [fatality.render](/fatality/render.md)

### events

called when a csgo game event is fired. See[ events examples](/csgo/interfaces/events.md#example)

### registered\_shot

called when a shot is registered on the server. See [fatality.shot\_t](/fatality/datatypes/shot.md)

## Examples

```lua
local Callbacks  = fatality.callbacks
local Render     = fatality.render
local EntityList = csgo.interface_handler:get_entity_list( )

-- Function to call on paint
local function OnPaint()
    -- Call fatality.render:rect
    Render:rect( 10, 10, 20, 20, csgo.color(255, 255, 255, 255) )    
end

-- Function to call on registered_shot with parameter
local function OnRegisteredShot(Shot)
    -- Get player from Shot.victim value
    local Player = EntityList:get_player( Shot.victim )
    -- Check if the player is valid
    if Player then
    -- Print that we hit them
        print( string.format( "Hit %s", Player:get_name( ) )
    end
end

-- Add the callbacks
Callbacks:add( "paint", OnPaint )
Callbacks:add( "registered_shot", OnRegisteredShot )
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://lua.legacy.fatality.win/fatality/callback.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.