> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dietrich-development.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Developer reference

> Weapon controller helper functions and programmatic access to perk values

## Helper functions

The script includes built-in helper functions for developers:

```lua theme={null}
-- Linear interpolation helper
local function lerp(a, b, t)
    return a + (b - a) * t
end

-- Get interpolation factor based on curve type
local function getInterpT(curve, level)
    local minL, maxL = curve.minLevel, curve.maxLevel
    local range = maxL - minL
    local t = (range > 0) and ((level - minL) / range) or 0

    if curve.interpolation == "linear" then
        return t
    elseif curve.interpolation == "exponential" then
        return math.pow(t, curve.expPower or 1)
    elseif curve.interpolation == "custom" then
        return nil  -- custom values handled separately
    else
        return t  -- fallback to linear
    end
end
```

## Getting perk values

Access perk values programmatically:

```lua theme={null}
-- Get perk values for a specific level
local perkValues = Config.GetPerk(playerLevel)
local accuracy = perkValues.minAccuracy
local recoil = perkValues.maxScopeRecoil
```

<Note>
  Perk values are pre-computed at startup, so lookups are cheap and safe to call during gameplay.
</Note>