local function initialise_falling_blades()
  for i = 1, 5 do
    local delay = 4 + (i - 1) * 10
    trx.items[87 + i].properties.delay = delay
    trx.items[98 - i].properties.delay = delay
  end
end

trx.events.on_game_start(function(is_save)
  trx.items[3].properties.pickup_mode = trx.items.PickupMode.PLINTH_LOW
  trx.items[4].properties.pickup_mode = trx.items.PickupMode.PLINTH_LOW
  trx.items[87].properties.pickup_mode = trx.items.PickupMode.PLINTH_LOW
  trx.items[61].properties.switch_mode = trx.items.SwitchMode.HIDDEN_REACH
  trx.items[100].properties.switch_mode = trx.items.SwitchMode.HIDDEN_PICKUP
  trx.items[101].properties.pickup_mode = trx.items.PickupMode.HIDDEN

  trx.objects.waterfall_1.properties.loop_sound = trx.items.WaterfallSound.SAND
  trx.objects.waterfall_1.properties.hide_when_inactive = true
  trx.objects.waterfall_2.properties.loop_sound = trx.items.WaterfallSound.SAND
  trx.objects.waterfall_2.properties.hide_when_inactive = true
  trx.items[0].properties.collidable_when_done = false
  trx.objects.scaled_spikes.properties.scaled_spikes_mode =
    trx.items.ScaledSpikesMode.EXTENDED
  trx.objects.small_scorpion.properties.is_venomous = false

  trx.items[43].properties.use_idle_pose = true
  trx.items[44].properties.use_idle_pose = true

  initialise_falling_blades()
end)

-- The caption the level opens with, which the level's strings carry.
require("common.ui.hud.legend").setup(trx.locale.text("general/legend"))

require("tr4.inv_setup").apply({
  -- Draw only the model mesh. The ring does not use the collision box.
  puzzle_item_1 = { scale = 1280, offset_y = 23, meshes = 1 },
  puzzle_item_2 = { scale = 768, offset_y = 24 },
  puzzle_item_1_combo_1 = { scale = 1280, offset_y = 23 },
  puzzle_item_1_combo_2 = { scale = 1280, offset_y = 23 },
})