Mission Start Trigger

local function getMissionClusters(mergeRadius)
  -- 1. Collect all coordinate locations, grouped by level
  -- 2. Build quadtree per level
  -- 3. For each location, find overlapping neighbors
  -- 4. Merge overlapping locations into clusters
  -- 5. Cache result by mergeRadius
end

local function merge(allClusters, cluster, mergeRadius)
  if #cluster == 1 then
    -- Single mission: use its position/radius directly
  else
    -- Multiple missions: compute weighted center
    -- 1. First pass: radius-weighted center
    -- 2. Second pass: distance-weighted center refinement
    -- 3. New radius = max(distance to any member + its radius) - 1
    -- All mission IDs collected into cluster
  end
end

{
  type = 'coordinates',
  level = "west_coast_usa",
  pos = vec3(...),
  rot = quat(...),
  radius = 3,
  check = defaultLocationCheck,
  displayMarker = defaultLocationDisplayMarker,
  missionIds = {"mission1", "mission2"},  -- for clusters
  clusterId = "mission1mission2"
}

-- Parsing validates required fields before generating locations:
local function parseMission(mission)
  local trigger = mission.startTrigger
  -- Check required fields for the trigger type
  -- Call the appropriate trigger handler (level/coordinates/league)
  -- Return locations array or error string
end

-- Level triggers support string or array of level names:
local function levelTriggerList(trigger, locations)
  if type(trigger.level) == 'string' then
    -- Single level
  elseif type(trigger.level) == 'table' then
    -- Multiple levels
  end
end