457 lines
12 KiB
Lua
457 lines
12 KiB
Lua
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function boost_cart:on_rail_step(entity, pos, distance)
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-- Play rail sound
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if entity.sound_counter <= 0 then
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minetest.sound_play("cart_rail", {
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pos = pos,
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max_hear_distance = 40,
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gain = 0.5
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})
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entity.sound_counter = math.random(4, 15)
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end
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entity.sound_counter = entity.sound_counter - distance
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if boost_cart.MESECONS then
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boost_cart:signal_detector_rail(pos)
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end
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end
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local cart_entity = {
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initial_properties = {
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physical = false,
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collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
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visual = "mesh",
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mesh = "cart.x",
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visual_size = {x=1, y=1},
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textures = {"cart.png"},
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},
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driver = nil,
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punched = false, -- used to re-send velocity and position
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velocity = {x=0, y=0, z=0}, -- only used on punch
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old_dir = {x=1, y=0, z=0}, -- random value to start the cart on punch
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old_pos = nil,
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old_switch = 0,
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sound_counter = 0,
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railtype = nil,
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attached_items = {}
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}
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-- Model and textures
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if boost_cart.MTG_CARTS then
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cart_entity.initial_properties.mesh = "carts_cart.b3d"
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cart_entity.initial_properties.textures = {"carts_cart.png"}
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end
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function cart_entity:on_rightclick(clicker)
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if not clicker or not clicker:is_player() then
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return
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end
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local player_name = clicker:get_player_name()
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if self.driver and player_name == self.driver then
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self.driver = nil
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boost_cart:manage_attachment(clicker, nil)
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elseif not self.driver then
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self.driver = player_name
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boost_cart:manage_attachment(clicker, self.object)
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if default.player_set_animation then
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-- player_api(/default) does not update the animation
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-- when the player is attached, reset to default animation
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default.player_set_animation(clicker, "stand")
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end
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end
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end
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function cart_entity:on_activate(staticdata, dtime_s)
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self.object:set_armor_groups({immortal=1})
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self.sound_counter = math.random(4, 15)
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if string.sub(staticdata, 1, string.len("return")) ~= "return" then
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return
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end
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local data = minetest.deserialize(staticdata)
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if type(data) ~= "table" then
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return
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end
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self.railtype = data.railtype
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self.old_dir = data.old_dir or self.old_dir
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self.old_pos = data.old_pos or self.old_pos
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-- Correct the position when the cart drives further after the last 'step()'
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if self.old_pos and boost_cart:is_rail(self.old_pos, self.railtype) then
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self.object:set_pos(self.old_pos)
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end
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end
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function cart_entity:get_staticdata()
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return minetest.serialize({
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railtype = self.railtype,
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old_dir = self.old_dir,
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old_pos = self.old_pos
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})
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end
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-- 0.5.x and later: When the driver leaves
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function cart_entity:on_detach_child(child)
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if child and child:get_player_name() == self.driver then
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self.driver = nil
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boost_cart:manage_attachment(child, nil)
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end
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end
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function cart_entity:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
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local pos = self.object:get_pos()
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local vel = self.object:get_velocity()
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if not self.railtype or vector.equals(vel, {x=0, y=0, z=0}) then
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local node = minetest.get_node(pos).name
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self.railtype = minetest.get_item_group(node, "connect_to_raillike")
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end
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if not puncher or not puncher:is_player() then
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local cart_dir = boost_cart:get_rail_direction(pos, self.old_dir, nil, nil, self.railtype)
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if vector.equals(cart_dir, {x=0, y=0, z=0}) then
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return
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end
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self.velocity = vector.multiply(cart_dir, 3)
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self.punched = true
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return
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end
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if puncher:get_player_control().sneak then
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-- Pick up cart: Drop all attachments
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if self.driver then
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if self.old_pos then
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self.object:set_pos(self.old_pos)
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end
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local player = minetest.get_player_by_name(self.driver)
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boost_cart:manage_attachment(player, nil)
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end
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for _, obj_ in pairs(self.attached_items) do
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if obj_ then
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obj_:set_detach()
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end
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end
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local leftover = puncher:get_inventory():add_item("main", "carts:cart")
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if not leftover:is_empty() then
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minetest.add_item(pos, leftover)
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end
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self.object:remove()
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return
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end
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-- Driver punches to accelerate the cart
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if puncher:get_player_name() == self.driver then
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if math.abs(vel.x + vel.z) > boost_cart.punch_speed_max then
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return
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end
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end
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local punch_dir = boost_cart:velocity_to_dir(puncher:get_look_dir())
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punch_dir.y = 0
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local cart_dir = boost_cart:get_rail_direction(pos, punch_dir, nil, nil, self.railtype)
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if vector.equals(cart_dir, {x=0, y=0, z=0}) then
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return
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end
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local punch_interval = 1
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-- Faulty tool registrations may cause the interval to be set to 0 !
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if tool_capabilities and (tool_capabilities.full_punch_interval or 0) > 0 then
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punch_interval = tool_capabilities.full_punch_interval
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end
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time_from_last_punch = math.min(time_from_last_punch or punch_interval, punch_interval)
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local f = 3 * (time_from_last_punch / punch_interval)
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self.velocity = vector.multiply(cart_dir, f)
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self.old_dir = cart_dir
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self.punched = true
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end
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local v3_len = vector.length
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function cart_entity:on_step(dtime)
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local vel = self.object:get_velocity()
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if self.punched then
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vel = vector.add(vel, self.velocity)
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self.object:set_velocity(vel)
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self.old_dir.y = 0
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elseif vector.equals(vel, {x=0, y=0, z=0}) then
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return
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end
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local pos = self.object:get_pos()
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local cart_dir = boost_cart:velocity_to_dir(vel)
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local same_dir = vector.equals(cart_dir, self.old_dir)
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local update = {}
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if self.old_pos and not self.punched and same_dir then
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local flo_pos = vector.round(pos)
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local flo_old = vector.round(self.old_pos)
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if vector.equals(flo_pos, flo_old) then
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-- Do not check one node multiple times
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return
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end
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end
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local ctrl, player
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local distance = 1
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-- Get player controls
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if self.driver then
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player = minetest.get_player_by_name(self.driver)
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if player then
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ctrl = player:get_player_control()
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end
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end
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local stop_wiggle = false
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if self.old_pos and same_dir then
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-- Detection for "skipping" nodes (perhaps use average dtime?)
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-- It's sophisticated enough to take the acceleration in account
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local acc = self.object:get_acceleration()
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distance = dtime * (v3_len(vel) + 0.5 * dtime * v3_len(acc))
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local new_pos, new_dir = boost_cart:pathfinder(
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pos, self.old_pos, self.old_dir, distance, ctrl,
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self.old_switch, self.railtype
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)
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if new_pos then
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-- No rail found: set to the expected position
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pos = new_pos
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update.pos = true
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cart_dir = new_dir
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end
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elseif self.old_pos and self.old_dir.y ~= 1 and not self.punched then
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-- Stop wiggle
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stop_wiggle = true
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end
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-- dir: New moving direction of the cart
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-- switch_keys: Currently pressed L(1) or R(2) key,
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-- used to ignore the key on the next rail node
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local dir, switch_keys = boost_cart:get_rail_direction(
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pos, cart_dir, ctrl, self.old_switch, self.railtype
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)
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local dir_changed = not vector.equals(dir, self.old_dir)
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local acc = 0
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if stop_wiggle or vector.equals(dir, {x=0, y=0, z=0}) then
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vel = {x=0, y=0, z=0}
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local pos_r = vector.round(pos)
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if not boost_cart:is_rail(pos_r, self.railtype)
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and self.old_pos then
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pos = self.old_pos
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elseif not stop_wiggle then
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pos = pos_r
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else
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pos.y = math.floor(pos.y + 0.5)
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end
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update.pos = true
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update.vel = true
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else
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-- Direction change detected
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if dir_changed then
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vel = vector.multiply(dir, math.abs(vel.x + vel.z))
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update.vel = true
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if dir.y ~= self.old_dir.y then
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pos = vector.round(pos)
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update.pos = true
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end
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end
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-- Center on the rail
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if dir.z ~= 0 and math.floor(pos.x + 0.5) ~= pos.x then
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pos.x = math.floor(pos.x + 0.5)
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update.pos = true
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end
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if dir.x ~= 0 and math.floor(pos.z + 0.5) ~= pos.z then
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pos.z = math.floor(pos.z + 0.5)
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update.pos = true
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end
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-- Calculate current cart acceleration
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acc = nil
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local acc_meta = minetest.get_meta(pos):get_string("cart_acceleration")
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if acc_meta == "halt" and not self.punched then
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-- Stop rail
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vel = {x=0, y=0, z=0}
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acc = false
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pos = vector.round(pos)
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update.pos = true
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update.vel = true
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end
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if acc == nil then
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-- Meta speed modifier
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local speed_mod = tonumber(acc_meta)
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if speed_mod and speed_mod ~= 0 then
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-- Try to make it similar to the original carts mod
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acc = speed_mod * 10
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end
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end
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if acc == nil and boost_cart.MTG_CARTS then
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-- MTG Cart API adaption
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local rail_node = minetest.get_node(vector.round(pos))
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local railparam = carts.railparams[rail_node.name]
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if railparam and railparam.acceleration then
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acc = railparam.acceleration
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end
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end
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if acc ~= false then
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-- Handbrake
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if ctrl and ctrl.down then
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acc = (acc or 0) - 2
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elseif acc == nil then
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acc = -0.4
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end
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end
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if ctrl and ctrl.sneak then
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-- Descend when sneak is pressed
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boost_cart:manage_attachment(player, nil)
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player = nil
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ctrl = nil
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end
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if acc then
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-- Slow down or speed up, depending on Y direction
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acc = acc + dir.y * -2.1
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else
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acc = 0
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end
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end
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-- Limit cart speed
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local vel_len = vector.length(vel)
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if vel_len > boost_cart.speed_max then
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vel = vector.multiply(vel, boost_cart.speed_max / vel_len)
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update.vel = true
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end
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if vel_len >= boost_cart.speed_max and acc > 0 then
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acc = 0
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end
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self.object:set_acceleration(vector.multiply(dir, acc))
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self.old_pos = vector.round(pos)
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local old_y_dir = self.old_dir.y
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if not vector.equals(dir, {x=0, y=0, z=0}) and not stop_wiggle then
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self.old_dir = dir
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else
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-- Cart stopped, set the animation to 0
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self.old_dir.y = 0
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end
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self.old_switch = switch_keys
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boost_cart:on_rail_step(self, self.old_pos, distance)
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if self.punched then
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-- Collect dropped items
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for _, obj_ in pairs(minetest.get_objects_inside_radius(pos, 1)) do
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local ent = obj_:get_luaentity()
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-- Careful here: physical_state and disable_physics are item-internal APIs
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if ent and ent.name == "__builtin:item" and ent.physical_state then
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-- Check API to support 5.2.0 and older
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if ent.disable_physics then
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ent:disable_physics()
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end
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obj_:set_attach(self.object, "", {x=0, y=0, z=0}, {x=0, y=0, z=0})
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self.attached_items[#self.attached_items + 1] = obj_
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end
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end
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self.punched = false
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update.vel = true
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end
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if not (update.vel or update.pos) then
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return
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end
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-- Re-use "dir", localize self.old_dir
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dir = self.old_dir
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local yaw = 0
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if dir.x < 0 then
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yaw = 0.5
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elseif dir.x > 0 then
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yaw = 1.5
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elseif dir.z < 0 then
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yaw = 1
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end
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self.object:set_yaw(yaw * math.pi)
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local anim = {x=0, y=0}
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if dir.y == -1 then
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anim = {x=1, y=1}
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elseif dir.y == 1 then
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anim = {x=2, y=2}
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end
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self.object:set_animation(anim, 1, 0)
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-- Change player model rotation, depending on the Y direction
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if player and dir.y ~= old_y_dir then
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local feet = {x=0, y=-4, z=0}
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local eye = {x=0, y=-4, z=0}
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if dir.y ~= 0 then
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-- TODO: Find a better way to calculate this
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feet.y = feet.y + 4
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feet.z = -dir.y * 2
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eye.z = -dir.y * 8
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end
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player:set_attach(self.object, "", feet,
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{x=dir.y * -30, y=0, z=0})
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player:set_eye_offset(eye, eye)
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end
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if update.vel then
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self.object:set_velocity(vel)
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end
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if update.pos then
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if dir_changed then
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self.object:set_pos(pos)
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else
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self.object:move_to(pos)
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end
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end
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end
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minetest.register_entity(":carts:cart", cart_entity)
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-- Register item to place the entity
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if not boost_cart.MTG_CARTS then
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minetest.register_craftitem(":carts:cart", {
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description = "Cart (Sneak+Click to pick up)",
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inventory_image = minetest.inventorycube(
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"cart_top.png",
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"cart_side.png",
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"cart_side.png"
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),
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wield_image = "cart_side.png",
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on_place = function(itemstack, placer, pointed_thing)
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if not pointed_thing.type == "node" then
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return
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end
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if boost_cart:is_rail(pointed_thing.under) then
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minetest.add_entity(pointed_thing.under, "carts:cart")
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elseif boost_cart:is_rail(pointed_thing.above) then
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minetest.add_entity(pointed_thing.above, "carts:cart")
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else
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return
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end
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if not minetest.settings:get_bool("creative_mode") then
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itemstack:take_item()
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end
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return itemstack
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end,
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})
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minetest.register_craft({
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output = "carts:cart",
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recipe = {
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{"default:steel_ingot", "", "default:steel_ingot"},
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{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
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},
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})
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end
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