spears/functions.lua

167 rindas
6.3 KiB
Lua

function spears_throw (itemstack, player, pointed_thing)
local spear = itemstack:get_name() .. '_entity'
local player_pos = player:get_pos()
local head_pos = vector.new(player_pos.x, player_pos.y + player:get_properties().eye_height, player_pos.z)
local direction = player:get_look_dir()
local throw_pos = vector.add(head_pos, vector.multiply(direction,0.5))
local pitch = player:get_look_vertical()
local yaw = player:get_look_horizontal()
local rotation = vector.new(0, yaw + math.pi/2, pitch + math.pi/6)
local wear = itemstack:get_wear()
local pointed_a = pointed_thing.above
local pointed_b = pointed_thing.under
if pointed_thing.type == "node" and vector.distance(pointed_a, throw_pos) < 1 then -- Stick into node
local node = minetest.get_node(pointed_b)
local check_node = spears_check_node(node.name)
if check_node == SPEARS_NODE_UNKNOWN then
return false
elseif check_node == SPEARS_NODE_CRACKY then
minetest.sound_play("default_metal_footstep", {pos = pointed_a}, true)
return false
elseif check_node == SPEARS_NODE_STICKY then
local spear_object = minetest.add_entity(vector.divide(vector.add(vector.multiply(pointed_a, 2), pointed_b), 3), spear)
spear_object:set_rotation(rotation)
spear_object:get_luaentity()._wear = wear
spear_object:get_luaentity()._stickpos = pointed_b
minetest.sound_play("default_place_node", {pos = pointed_a}, true)
return false
end
else -- Avoid hitting yourself and throw
local throw_speed = SPEARS_THROW_SPEED
while vector.distance(player_pos, throw_pos) < 1.2 do
throw_pos = vector.add(throw_pos, vector.multiply(direction, 0.1))
end
local player_vel = player:get_velocity()
local spear_object = minetest.add_entity(throw_pos, spear)
spear_object:set_velocity(vector.add(player_vel, vector.multiply(direction, throw_speed)))
spear_object:set_rotation(rotation)
minetest.sound_play("spears_throw", {pos = player_pos}, true)
spear_object:get_luaentity()._wear = wear
spear_object:get_luaentity()._stickpos = nil
return true
end
end
function spears_set_entity(spear_type, base_damage, toughness)
local SPEAR_ENTITY={
initial_properties = {
physical = false,
visual = "item",
visual_size = {x = 0.3, y = 0.3, z = 0.3},
wield_item = "spears:spear_" .. spear_type,
collisionbox = {-0.3, -0.3, -0.3, 0.3, 0.3, 0.3},
lastpos={},
},
on_activate = function (self, staticdata, dtime_s)
self.object:set_armor_groups({immortal = 1})
end,
on_punch = function (self, puncher)
if puncher:is_player() then -- Grab the spear
local stack = {name='spears:spear_' .. spear_type, wear = self._wear}
local inv = puncher:get_inventory()
if inv:room_for_item("main", stack) then
inv:add_item("main", stack)
self.object:remove()
end
end
end,
on_step = function(self, dtime)
local wear = self._wear
if wear == nil then
self.object:remove()
return false
end
local pos = self.object:get_pos()
local velocity = self.object:get_velocity()
local speed = vector.length(velocity)
if self._stickpos ~= nil then -- Spear is stuck
local node = minetest.get_node(self._stickpos)
local check_node = spears_check_node(node.name)
if check_node ~= SPEARS_NODE_STICKY then -- Fall when node is removed
self.object:remove()
minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
return false
end
else -- Spear is flying
local direction = vector.normalize(velocity)
local yaw = minetest.dir_to_yaw(direction)
local pitch = math.acos(velocity.y/speed) - math.pi/3
local spearhead_pos = vector.add(pos, vector.multiply(direction, 0.5))
self.object:set_rotation({x = 0, y = yaw + math.pi/2, z = pitch})
-- Hit someone?
local objects_in_radius = minetest.get_objects_inside_radius(spearhead_pos, 0.6)
for _,object in ipairs(objects_in_radius) do
if object:get_luaentity() ~= self and object:get_armor_groups().fleshy then
local damage = (speed + base_damage)^1.15 - 20
object:punch(self.object, 1.0, {full_punch_interval = 1.0, damage_groups = {fleshy=damage},}, direction)
self.object:remove()
minetest.sound_play("spears_hit", {pos = pos}, true)
wear = spears_wear(wear, toughness)
minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
return true
end
end
-- Hit a node?
local node = minetest.get_node(spearhead_pos)
local check_node = spears_check_node(node.name)
if check_node == SPEARS_NODE_UNKNOWN then
self.object:remove()
minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
elseif check_node ~= SPEARS_NODE_THROUGH then
wear = spears_wear(wear, toughness)
if wear >= 65535 then
minetest.sound_play("default_tool_breaks", {pos = pos}, true)
self.object:remove()
minetest.add_item(pos, {name='defaut:stick'})
return false
elseif check_node == SPEARS_NODE_CRACKY then
minetest.sound_play("default_metal_footstep", {pos = pos}, true)
self.object:remove()
minetest.add_item(pos, {name='spears:spear_' .. spear_type, wear = wear})
return false
elseif check_node == SPEARS_NODE_STICKY then
self.object:set_acceleration(SPEARS_V_ZERO)
self.object:set_velocity(SPEARS_V_ZERO)
minetest.sound_play("default_place_node", {pos = pos}, true)
self._stickpos = spearhead_pos
self._wear = wear
end
else -- Get drag
local viscosity = minetest.registered_nodes[node.name].liquid_viscosity
local drag = math.max(viscosity, SPEARS_DRAG_COEFF)
local acceleration = vector.multiply(velocity, -drag)
acceleration.y = acceleration.y - 10 * ((7 - drag) / 7)
self.object:set_acceleration(acceleration)
end
end
end,
}
return SPEAR_ENTITY
end
function spears_check_node(node_name)
local node = minetest.registered_nodes[node_name]
if node == nil then
return SPEARS_NODE_UNKNOWN
elseif node.groups.cracky ~= nil and node.groups.cracky < SPEARS_NODE_CRACKY_LIMIT then
return SPEARS_NODE_CRACKY
elseif node.walkable and not node.buildable then
return SPEARS_NODE_STICKY
else
return SPEARS_NODE_THROUGH
end
end
function spears_wear(initial_wear, toughness)
if not minetest.settings:get_bool("creative_mode") then
local wear = initial_wear + 65535/toughness
return wear
else
local wear = initial_wear
return wear
end
end