GE Lua Documentation

isCrashAvoidable

Definition

-- @/lua/ge/map.lua:3686

local function isCrashAvoidable(objectID, pos, radius)
  -- check if position (pos) with dimension radius is safe to spawn given object (objectID) in motion

  local obj = getObjectByID(objectID)
  if not obj then return true end

  radius = radius or 7.5

  local relativePos = pos - vec3(obj:getSpawnWorldOOBB():getCenter())
  local relativePosLen = relativePos:length()

  -- Over 150m, we assume it's safe to spawn
  if relativePosLen > 150 then return true end

  local objVel = vec3(obj:getVelocity())
  local relativeSpeed = max(objVel:dot(relativePos / (relativePosLen + 1e-30)), 0)
  local ff = 0.5 * vecUp:dot(vec3(obj:getDirectionVectorUp())) -- frictionCoeff * Normal Force.
  local objDirVec = vec3(obj:getDirectionVector())
  local fw = vecUp:dot(sign(objVel:dot(objDirVec)) * objDirVec) -- road grade force

  -- Prevents division by zero gravity
  local gravity = core_environment.getGravity()
  gravity = max(0.1, abs(gravity)) * sign2(gravity)

  local a = max(1e-30, -gravity * (ff + fw))
  return relativePosLen > relativeSpeed * relativeSpeed / (2 * a) + obj:getInitialLength() * 0.5 + radius
end

Callers

  for _, otherId in ipairs(gameplay_traffic.getTrafficList()) do
    if otherId ~= vehID and (not map.isCrashAvoidable(otherId, bbCenter, vehRadius) or intersectingOtherVehicle(getObjectByID(otherId), axis0, axis1, axis2, halfExtentsX, halfExtentsY, halfExtentsZ, bbCenter)) then
      gameplay_traffic.forceTeleport(otherId, bbCenter)