232 lines
6.8 KiB
Lua
232 lines
6.8 KiB
Lua
--
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-- Snowballs and other throwable items
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--
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local GRAVITY = tonumber(minetest.setting_get("movement_gravity"))
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local entity_mapping = {
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["mcl_throwing:snowball"] = "mcl_throwing:snowball_entity",
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["mcl_throwing:egg"] = "mcl_throwing:egg_entity",
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["mcl_throwing:ender_pearl"] = "mcl_throwing:ender_pearl_entity",
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}
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local velocities = {
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["mcl_throwing:snowball_entity"] = 22,
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["mcl_throwing:egg_entity"] = 22,
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["mcl_throwing:ender_pearl_entity"] = 22,
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}
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mcl_throwing.throw = function(throw_item, pos, dir, velocity)
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if velocity == nil then
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velocity = velocities[entity_name]
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end
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if velocity == nil then
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velocity = 22
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end
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local itemstring = ItemStack(throw_item):get_name()
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local obj = minetest.add_entity(pos, entity_mapping[itemstring])
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obj:setvelocity({x=dir.x*velocity, y=dir.y*velocity, z=dir.z*velocity})
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obj:setacceleration({x=dir.x*-3, y=-GRAVITY, z=dir.z*-3})
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return obj
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end
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-- Throw item
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local throw_function = function(entity_name, velocity)
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local func = function(item, player, pointed_thing)
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local playerpos = player:getpos()
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local dir = player:get_look_dir()
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local obj = mcl_throwing.throw(item, {x=playerpos.x, y=playerpos.y+1.5, z=playerpos.z}, dir, velocity)
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obj:get_luaentity()._thrower = player:get_player_name()
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if not minetest.setting_getbool("creative_mode") then
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item:take_item()
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end
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return item
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end
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return func
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end
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-- Staticdata handling because objects may want to be reloaded
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local get_staticdata = function(self)
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local data = {
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_lastpos = self._lastpos,
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_thrower = self._thrower,
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}
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return minetest.serialize(data)
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end
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local on_activate = function(self, staticdata, dtime_s)
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local data = minetest.deserialize(staticdata)
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if data then
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self._lastpos = data._lastpos
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self._thrower = data._thrower
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end
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end
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-- The snowball entity
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local snowball_ENTITY={
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physical = false,
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timer=0,
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textures = {"mcl_throwing_snowball.png"},
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visual_size = {x=0.5, y=0.5},
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collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
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on_activate = on_activate,
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_lastpos={},
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}
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local egg_ENTITY={
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physical = false,
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timer=0,
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textures = {"mcl_throwing_egg.png"},
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visual_size = {x=0.45, y=0.45},
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collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
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on_activate = on_activate,
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_lastpos={},
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}
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-- Ender pearl entity
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local pearl_ENTITY={
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physical = false,
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timer=0,
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textures = {"mcl_throwing_ender_pearl.png"},
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visual_size = {x=0.9, y=0.9},
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collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
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on_activate = on_activate,
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_lastpos={},
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_thrower = nil, -- Player ObjectRef of the player who threw the ender pearl
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}
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-- Snowball on_step()--> called when snowball is moving.
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local snowball_on_step = function(self, dtime)
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self.timer=self.timer+dtime
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local pos = self.object:getpos()
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local node = minetest.get_node(pos)
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local def = minetest.registered_nodes[node.name]
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-- Destroy when hitting a solid node
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if self._lastpos.x~=nil then
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if (def and def.walkable) or not def then
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self.object:remove()
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return
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end
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end
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self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set _lastpos-->Node will be added at last pos outside the node
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end
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-- Movement function of egg
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local egg_on_step = function(self, dtime)
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self.timer=self.timer+dtime
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local pos = self.object:getpos()
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local node = minetest.get_node(pos)
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local def = minetest.registered_nodes[node.name]
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-- Destroy when hitting a solid node
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if self._lastpos.x~=nil then
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if (def and def.walkable) or not def then
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-- 1/8 chance to spawn a chick
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-- FIXME: Spawn chicks instead of chickens
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-- FIXME: Chicks have a quite good chance to spawn in walls
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local r = math.random(1,8)
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if r == 1 then
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minetest.add_entity(self._lastpos, "mobs_mc:chicken")
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-- BONUS ROUND: 1/32 chance to spawn 3 additional chicks
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local r = math.random(1,32)
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if r == 1 then
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local offsets = {
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{ x=0.7, y=0, z=0 },
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{ x=-0.7, y=0, z=-0.7 },
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{ x=-0.7, y=0, z=0.7 },
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}
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for o=1, 3 do
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local pos = vector.add(self._lastpos, offsets[o])
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minetest.add_entity(pos, "mobs_mc:chicken")
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end
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end
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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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end
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self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
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end
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-- Movement function of ender pearl
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local pearl_on_step = function(self, dtime)
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self.timer=self.timer+dtime
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local pos = self.object:getpos()
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local node = minetest.get_node(pos)
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local def = minetest.registered_nodes[node.name]
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-- Destroy when hitting a solid node
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if self._lastpos.x~=nil then
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if (def and def.walkable) or not def then
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local player = minetest.get_player_by_name(self._thrower)
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if player then
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-- Teleport and hurt player
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player:setpos(pos)
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player:set_hp(player:get_hp() - 5)
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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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end
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self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
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end
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snowball_ENTITY.on_step = snowball_on_step
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egg_ENTITY.on_step = egg_on_step
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pearl_ENTITY.on_step = pearl_on_step
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minetest.register_entity("mcl_throwing:snowball_entity", snowball_ENTITY)
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minetest.register_entity("mcl_throwing:egg_entity", egg_ENTITY)
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minetest.register_entity("mcl_throwing:ender_pearl_entity", pearl_ENTITY)
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local how_to_throw = "Hold it in your and and leftclick to throw."
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-- Snowball
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minetest.register_craftitem("mcl_throwing:snowball", {
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description = "Snowball",
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_doc_items_longdesc = "Snowballs can be thrown or launched from a dispenser for fun. Hitting something with a snowball does nothing.",
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_doc_items_usagehelp = how_to_throw,
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inventory_image = "mcl_throwing_snowball.png",
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stack_max = 16,
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on_use = throw_function("mcl_throwing:snowball_entity"),
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on_construct = function(pos)
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pos.y = pos.y - 1
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if minetest.get_node(pos).name == "default:dirt_with_grass" then
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minetest.set_node(pos, {name="default:dirt_with_snow"})
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end
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end,
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})
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-- Egg
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minetest.register_craftitem("mcl_throwing:egg", {
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description = "Egg",
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_doc_items_longdesc = "Eggs can be thrown or launched from a dispenser and breaks on impact. There is a small chance that 1 or even 4 chickens will pop out of the egg when it hits the ground.",
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_doc_items_usagehelp = how_to_throw,
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inventory_image = "mcl_throwing_egg.png",
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stack_max = 16,
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on_use = throw_function("mcl_throwing:egg_entity"),
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groups = { craftitem = 1 },
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})
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-- Ender Pearl
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minetest.register_craftitem("mcl_throwing:ender_pearl", {
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description = "Ender Pearl",
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_doc_items_longdesc = "An ender pearl is an item which can be used for teleportation at the cost of health. It can be thrown and teleport the thrower to its impact location when it hits a block. Each teleportation hurts the user by 5 hit points.",
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_doc_items_usagehelp = how_to_throw,
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wield_image = "mcl_throwing_ender_pearl.png",
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inventory_image = "mcl_throwing_ender_pearl.png",
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stack_max = 16,
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on_use = throw_function("mcl_throwing:ender_pearl_entity"),
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})
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