From af8515b6e48af851bfc8d3d0d6bf515c601d1dc4 Mon Sep 17 00:00:00 2001 From: Wuzzy Date: Wed, 9 May 2018 15:10:56 +0200 Subject: [PATCH] Stuck arrows: Deflection, check stuck state, yaw --- mods/ITEMS/mcl_bows/arrow.lua | 79 ++++++++++++++++++++++++++++++++--- 1 file changed, 74 insertions(+), 5 deletions(-) diff --git a/mods/ITEMS/mcl_bows/arrow.lua b/mods/ITEMS/mcl_bows/arrow.lua index a7e06ae8..596a0d9b 100644 --- a/mods/ITEMS/mcl_bows/arrow.lua +++ b/mods/ITEMS/mcl_bows/arrow.lua @@ -1,8 +1,15 @@ -- Time in seconds after which a stuck arrow is deleted local ARROW_TIMEOUT = 60 +-- Time after which stuck arrow is rechecked for being stuck +local STUCK_RECHECK_TIME = 5 + +local GRAVITY = 9.81 + +local YAW_OFFSET = -math.pi/2 local mod_mcl_hunger = minetest.get_modpath("mcl_hunger") local mod_awards = minetest.get_modpath("awards") and minetest.get_modpath("mcl_achievements") +local mod_button = minetest.get_modpath("mesecons_button") minetest.register_craftitem("mcl_bows:arrow", { description = "Arrow", @@ -14,7 +21,7 @@ An arrow fired from a bow has a regular damage of 1-9. At full charge, there's a _on_dispense = function(itemstack, dispenserpos, droppos, dropnode, dropdir) -- Shoot arrow local shootpos = vector.add(dispenserpos, vector.multiply(dropdir, 0.51)) - local yaw = math.atan2(dropdir.z, dropdir.x) - math.pi/2 + local yaw = math.atan2(dropdir.z, dropdir.x) + YAW_OFFSET mcl_bows.shoot_arrow(itemstack:get_name(), shootpos, dropdir, yaw, nil, 19, 3) end, }) @@ -61,9 +68,20 @@ local ARROW_ENTITY={ _damage=1, -- Damage on impact _stuck=false, -- Whether arrow is stuck _stucktimer=nil,-- Amount of time (in seconds) the arrow has been stuck so far + _stuckrechecktimer=nil,-- An additional timer for periodically re-checking the stuck status of an arrow + _stuckin=nil, --Position of node in which arow is stuck. _shooter=nil, -- ObjectRef of player or mob who shot it } +local spawn_item = function(self, pos) + if not minetest.settings:get_bool("creative_mode") then + local item = minetest.add_item(pos, "mcl_bows:arrow") + item:set_velocity({x=0, y=0, z=0}) + item:set_yaw(self.object:get_yaw()) + end + self.object:remove() +end + ARROW_ENTITY.on_step = function(self, dtime) local pos = self.object:getpos() local dpos = table.copy(pos) -- digital pos @@ -72,10 +90,24 @@ ARROW_ENTITY.on_step = function(self, dtime) if self._stuck then self._stucktimer = self._stucktimer + dtime + self._stuckrechecktimer = self._stuckrechecktimer + dtime if self._stucktimer > ARROW_TIMEOUT then self.object:remove() return end + -- Drop arrow as item when it is no longer stuck + if self._stuckrechecktimer > STUCK_RECHECK_TIME then + local stuckin_def + if self._stuckin then + stuckin_def = minetest.registered_nodes[minetest.get_node(self._stuckin).name] + end + -- TODO: In MC, arrow just falls down without turning into an item + if stuckin_def and stuckin_def.walkable == false then + spawn_item(self, pos) + return + end + self._stuckrechecktimer = 0 + end local objects = minetest.get_objects_inside_radius(pos, 2) for _,obj in ipairs(objects) do if obj:is_player() then @@ -171,15 +203,40 @@ ARROW_ENTITY.on_step = function(self, dtime) if self._lastpos.x~=nil and not self._stuck then local def = minetest.registered_nodes[node.name] local vel = self.object:get_velocity() - -- Arrow has stopped + -- Arrow has stopped in one axis, so it probably hit something if (math.abs(vel.x) < 0.0001) or (math.abs(vel.z) < 0.0001) or (math.abs(vel.y) < 0.00001) then - -- Arrow is stuck and no longer moves + -- Check for the node to which the arrow is pointing + local dir + if vel.y >= 0 and vel.y < 0.00001 then + dir = {x=0, y=-1, z=0} + elseif vel.y <= 0 and vel.y > 0.00001 then + dir = {x=0, y=1, z=0} + else + dir = minetest.facedir_to_dir(minetest.dir_to_facedir(minetest.yaw_to_dir(self.object:get_yaw()-YAW_OFFSET))) + end + self._stuckin = vector.add(pos, dir) + local snode = minetest.get_node(self._stuckin) + local sdef = minetest.registered_nodes[snode.name] + + -- If node is non-walkable, unknown or ignore, don't make arrow stuck. + -- This causes a deflection in the engine. + if not sdef or sdef.walkable == false or snode.name == "ignore" then + self._stuckin = nil + -- Lose 1/3 of velocity on deflection + self.object:set_velocity(vector.multiply(vel, 0.6667)) + return + end + + -- Node was walkable, make arrow stuck self._stuck = true self._stucktimer = 0 + self._stuckrechecktimer = 0 + self.object:set_velocity({x=0, y=0, z=0}) self.object:set_acceleration({x=0, y=0, z=0}) - -- Push the button - if minetest.get_modpath("mesecons_button") and minetest.get_item_group(node.name, "button") > 0 and minetest.get_item_group(node.name, "button_push_by_arrow") == 1 then + + -- Push the button! Push, push, push the button! + if mod_button and minetest.get_item_group(node.name, "button") > 0 and minetest.get_item_group(node.name, "button_push_by_arrow") == 1 then mesecon.push_button(dpos, node) end elseif (def and def.liquidtype ~= "none") then @@ -199,6 +256,12 @@ ARROW_ENTITY.on_step = function(self, dtime) end end + -- Update yaw + if not self._stuck then + local vel = self.object:get_velocity() + self.object:set_yaw(minetest.dir_to_yaw(vel)+YAW_OFFSET) + end + -- Update internal variable self._lastpos={x=pos.x, y=pos.y, z=pos.z} end @@ -210,6 +273,7 @@ ARROW_ENTITY.get_staticdata = function(self) damage = self._damage, stuck = self._stuck, stucktimer = self._stucktimer, + stuckin = self._stuckin, } if self._shooter and self._shooter:is_player() then out.shootername = self._shooter:get_player_name() @@ -224,7 +288,12 @@ ARROW_ENTITY.on_activate = function(self, staticdata, dtime_s) self._startpos = data.startpos self._damage = data.damage self._stuck = data.stuck + if self._stuck then + -- Perform a stuck recheck on the next step + self._stuckrechecktimer = STUCK_RECHECK_TIME + end self._stucktimer = data.stucktimer + self._stuckin = data.stuckin if data.shootername then local shooter = minetest.get_player_by_name(data.shootername) if shooter and shooter:is_player() then