367 lines
11 KiB
Lua
367 lines
11 KiB
Lua
local S = minetest.get_translator("mcl_boats")
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--
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-- Helper functions
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--
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local function is_water(pos)
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local nn = minetest.get_node(pos).name
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return minetest.get_item_group(nn, "water") ~= 0
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end
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local function get_sign(i)
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if i == 0 then
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return 0
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else
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return i / math.abs(i)
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end
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end
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local function get_velocity(v, yaw, y)
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local x = -math.sin(yaw) * v
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local z = math.cos(yaw) * v
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return {x = x, y = y, z = z}
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end
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local function get_v(v)
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return math.sqrt(v.x ^ 2 + v.z ^ 2)
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end
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local boat_visual_size = {x = 3, y = 3}
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-- Note: This mod assumes the default player visual_size is {x=1, y=1}
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local driver_visual_size = { x = 1/boat_visual_size.x, y = 1/boat_visual_size.y }
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local paddling_speed = 22
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local boat_y_offset = 0.35
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local boat_y_offset_ground = boat_y_offset + 0.6
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local boat_side_offset = 1.001
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--
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-- Boat entity
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--
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local boat = {
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physical = true,
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-- Warning: Do not change the position of the collisionbox top surface,
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-- lowering it causes the boat to fall through the world if underwater
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collisionbox = {-0.5, -0.35, -0.5, 0.5, 0.3, 0.5},
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visual = "mesh",
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mesh = "mcl_boats_boat.b3d",
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textures = {"mcl_boats_texture_oak_boat.png"},
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visual_size = boat_visual_size,
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_driver = nil, -- Attached driver (player) or nil if none
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_v = 0, -- Speed
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_last_v = 0, -- Temporary speed variable
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_removed = false, -- If true, boat entity is considered removed (e.g. after punch) and should be ignored
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_itemstring = "mcl_boats:boat", -- Itemstring of the boat item (implies boat type)
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_animation = 0, -- 0: not animated; 1: paddling forwards; -1: paddling forwards
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}
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function boat.on_rightclick(self, 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 name = clicker:get_player_name()
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if self._driver and clicker == self._driver then
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self._driver = nil
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clicker:set_detach()
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clicker:set_properties({visual_size = {x=1, y=1}})
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mcl_player.player_attached[name] = false
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mcl_player.player_set_animation(clicker, "stand" , 30)
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local pos = clicker:get_pos()
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pos = {x = pos.x, y = pos.y + 0.2, z = pos.z}
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clicker:set_pos(pos)
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elseif not self._driver then
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local attach = clicker:get_attach()
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if attach and attach:get_luaentity() then
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local luaentity = attach:get_luaentity()
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if luaentity._driver then
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luaentity._driver = nil
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end
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clicker:set_detach()
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clicker:set_properties({visual_size = {x=1, y=1}})
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end
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self._driver = clicker
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clicker:set_attach(self.object, "",
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{x = 0, y = 0.42, z = -1}, {x = 0, y = 0, z = 0})
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clicker:set_properties({ visual_size = driver_visual_size })
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mcl_player.player_attached[name] = true
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minetest.after(0.2, function(name)
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local player = minetest.get_player_by_name(name)
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if player then
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mcl_player.player_set_animation(player, "sit" , 30)
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end
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end, name)
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clicker:set_look_horizontal(self.object:get_yaw())
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end
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end
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function boat.on_activate(self, staticdata, dtime_s)
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self.object:set_armor_groups({immortal = 1})
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local data = minetest.deserialize(staticdata)
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if type(data) == "table" then
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self._v = data.v
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self._last_v = self._v
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self._itemstring = data.itemstring
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self.object:set_properties({textures=data.textures})
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end
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end
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function boat.get_staticdata(self)
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return minetest.serialize({
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v = self._v,
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itemstring = self._itemstring,
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textures = self.object:get_properties().textures
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})
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end
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function boat.on_punch(self, puncher)
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if not puncher or not puncher:is_player() or self._removed then
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return
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end
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if self._driver and puncher == self._driver then
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self._driver = nil
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puncher:set_detach()
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puncher:set_properties({visual_size = {x=1, y=1}})
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mcl_player.player_attached[puncher:get_player_name()] = false
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end
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if not self._driver then
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self._removed = true
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-- Drop boat as item on the ground after punching
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if not minetest.is_creative_enabled(puncher:get_player_name()) then
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minetest.add_item(self.object:get_pos(), self._itemstring)
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else
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local inv = puncher:get_inventory()
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if not inv:contains_item("main", self._itemstring) then
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inv:add_item("main", self._itemstring)
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end
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end
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self.object:remove()
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end
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end
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function boat.on_step(self, dtime)
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self._v = get_v(self.object:get_velocity()) * get_sign(self._v)
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local on_water = true
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local in_water = false
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local v_factor = 1
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local v_slowdown = 0.02
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local p = self.object:get_pos()
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if (not is_water({x=p.x, y=p.y-boat_y_offset, z=p.z})) then
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on_water = false
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v_factor = 0.5
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v_slowdown = 0.04
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elseif (is_water({x=p.x, y=p.y-boat_y_offset+1, z=p.z})) then
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on_water = false
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in_water = true
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v_factor = 0.75
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v_slowdown = 0.05
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end
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if self._driver then
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local ctrl = self._driver:get_player_control()
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local yaw = self.object:get_yaw()
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if ctrl.up then
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-- Forwards
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self._v = self._v + 0.1 * v_factor
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-- Paddling animation
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if self._animation ~= 1 then
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self.object:set_animation({x=0, y=40}, paddling_speed, 0, true)
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self._animation = 1
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end
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elseif ctrl.down then
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-- Backwards
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self._v = self._v - 0.1 * v_factor
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-- Paddling animation, reversed
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if self._animation ~= -1 then
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self.object:set_animation({x=0, y=40}, -paddling_speed, 0, true)
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self._animation = -1
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end
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else
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-- Stop paddling animation if no control pressed
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if self._animation ~= 0 then
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self.object:set_animation({x=0, y=40}, 0, 0, true)
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self._animation = 0
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end
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end
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if ctrl.left then
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if self._v < 0 then
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self.object:set_yaw(yaw - (1 + dtime) * 0.03 * v_factor)
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else
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self.object:set_yaw(yaw + (1 + dtime) * 0.03 * v_factor)
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end
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elseif ctrl.right then
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if self._v < 0 then
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self.object:set_yaw(yaw + (1 + dtime) * 0.03 * v_factor)
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else
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self.object:set_yaw(yaw - (1 + dtime) * 0.03 * v_factor)
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end
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end
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else
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-- Stop paddling without driver
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if self._animation ~= 0 then
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self.object:set_animation({x=0, y=40}, 0, 0, true)
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self._animation = 0
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end
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end
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local s = get_sign(self._v)
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if not on_water and not in_water and math.abs(self._v) > 1.0 then
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v_slowdown = math.min(math.abs(self._v) - 1.0, v_slowdown * 5)
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elseif in_water and math.abs(self._v) > 1.5 then
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v_slowdown = math.min(math.abs(self._v) - 1.5, v_slowdown * 5)
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end
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self._v = self._v - v_slowdown * s
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if s ~= get_sign(self._v) then
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self._v = 0
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end
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p.y = p.y - boat_y_offset
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local new_velo
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local new_acce = {x = 0, y = 0, z = 0}
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if not is_water(p) then
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-- Not on water or inside water: Free fall
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local nodedef = minetest.registered_nodes[minetest.get_node(p).name]
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new_acce = {x = 0, y = -9.8, z = 0}
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new_velo = get_velocity(self._v, self.object:get_yaw(),
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self.object:get_velocity().y)
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else
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p.y = p.y + 1
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if is_water(p) then
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-- Inside water: Slowly sink
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local y = self.object:get_velocity().y
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y = y - 0.01
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if y < -0.2 then
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y = -0.2
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end
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new_acce = {x = 0, y = 0, z = 0}
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new_velo = get_velocity(self._v, self.object:get_yaw(), y)
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else
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-- On top of water
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new_acce = {x = 0, y = 0, z = 0}
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if math.abs(self.object:get_velocity().y) < 0 then
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new_velo = get_velocity(self._v, self.object:get_yaw(), 0)
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else
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new_velo = get_velocity(self._v, self.object:get_yaw(),
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self.object:get_velocity().y)
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end
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end
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end
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-- Terminal velocity: 8 m/s per axis of travel
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for _,axis in pairs({"z","y","x"}) do
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if math.abs(new_velo[axis]) > 8 then
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new_velo[axis] = 8 * get_sign(new_velo[axis])
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end
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end
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self.object:set_velocity(new_velo)
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self.object:set_acceleration(new_acce)
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end
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-- Register one entity for all boat types
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minetest.register_entity("mcl_boats:boat", boat)
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local boat_ids = { "boat", "boat_spruce", "boat_birch", "boat_jungle", "boat_acacia", "boat_dark_oak" }
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local names = { S("Oak Boat"), S("Spruce Boat"), S("Birch Boat"), S("Jungle Boat"), S("Acacia Boat"), S("Dark Oak Boat") }
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local craftstuffs = {}
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if minetest.get_modpath("mcl_core") then
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craftstuffs = { "mcl_core:wood", "mcl_core:sprucewood", "mcl_core:birchwood", "mcl_core:junglewood", "mcl_core:acaciawood", "mcl_core:darkwood" }
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end
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local images = { "oak", "spruce", "birch", "jungle", "acacia", "dark_oak" }
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for b=1, #boat_ids do
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local itemstring = "mcl_boats:"..boat_ids[b]
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local longdesc, usagehelp, tt_help, help, helpname
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help = false
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-- Only create one help entry for all boats
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if b == 1 then
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help = true
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longdesc = S("Boats are used to travel on the surface of water.")
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usagehelp = S("Rightclick on a water source to place the boat. Rightclick the boat to enter it. Use [Left] and [Right] to steer, [Forwards] to speed up and [Backwards] to slow down or move backwards. Rightclick the boat again to leave it, punch the boat to make it drop as an item.")
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helpname = S("Boat")
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end
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tt_help = S("Water vehicle")
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minetest.register_craftitem(itemstring, {
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description = names[b],
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_tt_help = tt_help,
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_doc_items_create_entry = help,
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_doc_items_entry_name = helpname,
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_doc_items_longdesc = longdesc,
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_doc_items_usagehelp = usagehelp,
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inventory_image = "mcl_boats_"..images[b].."_boat.png",
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liquids_pointable = true,
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groups = { boat = 1, transport = 1},
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stack_max = 1,
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on_place = function(itemstack, placer, pointed_thing)
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if pointed_thing.type ~= "node" then
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return itemstack
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end
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-- Call on_rightclick if the pointed node defines it
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local node = minetest.get_node(pointed_thing.under)
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if placer and not placer:get_player_control().sneak then
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if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
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return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
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end
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end
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local pos = table.copy(pointed_thing.under)
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local dir = vector.subtract(pointed_thing.above, pointed_thing.under)
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if math.abs(dir.x) > 0.9 or math.abs(dir.z) > 0.9 then
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pos = vector.add(pos, vector.multiply(dir, boat_side_offset))
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elseif is_water(pos) then
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pos = vector.add(pos, vector.multiply(dir, boat_y_offset))
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else
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pos = vector.add(pos, vector.multiply(dir, boat_y_offset_ground))
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end
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local boat = minetest.add_entity(pos, "mcl_boats:boat")
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boat:get_luaentity()._itemstring = itemstring
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boat:set_properties({textures = { "mcl_boats_texture_"..images[b].."_boat.png" }})
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boat:set_yaw(placer:get_look_horizontal())
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if not minetest.is_creative_enabled(placer:get_player_name()) 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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_on_dispense = function(stack, pos, droppos, dropnode, dropdir)
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local below = {x=droppos.x, y=droppos.y-1, z=droppos.z}
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local belownode = minetest.get_node(below)
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-- Place boat as entity on or in water
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if minetest.get_item_group(dropnode.name, "water") ~= 0 or (dropnode.name == "air" and minetest.get_item_group(belownode.name, "water") ~= 0) then
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minetest.add_entity(droppos, "mcl_boats:boat")
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else
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minetest.add_item(droppos, stack)
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end
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end,
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})
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local c = craftstuffs[b]
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minetest.register_craft({
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output = itemstring,
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recipe = {
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{c, "", c},
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{c, c, c},
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},
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})
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end
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minetest.register_craft({
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type = "fuel",
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recipe = "group:boat",
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burntime = 20,
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})
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if minetest.get_modpath("doc_identifier") ~= nil then
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doc.sub.identifier.register_object("mcl_boats:boat", "craftitems", "mcl_boats:boat")
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end
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