Mob API for mods to add monsters, animals and more. https://content.minetest.net/packages/TenPlus1/mobs/
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-- lib_mount by Blert2112 (edited by TenPlus1)
local abs, cos, floor, sin, sqrt, pi =
math.abs, math.cos, math.floor, math.sin, math.sqrt, math.pi
------------------------------------------------------------------------------
--
-- Helper functions
--
local node_ok = function(pos, fallback)
fallback = fallback or mobs.fallback_node
local node = minetest.get_node_or_nil(pos)
if node and minetest.registered_nodes[node.name] then
return node
end
return {name = fallback}
end
local function node_is(pos)
local node = node_ok(pos)
if node.name == "air" then
return "air"
end
if minetest.get_item_group(node.name, "lava") ~= 0 then
return "lava"
end
if minetest.get_item_group(node.name, "liquid") ~= 0 then
return "liquid"
end
if minetest.registered_nodes[node.name].walkable == true then
return "walkable"
end
return "other"
end
local function get_sign(i)
i = i or 0
if i == 0 then
return 0
else
return i / abs(i)
end
end
local function get_velocity(v, yaw, y)
local x = -sin(yaw) * v
local z = cos(yaw) * v
return {x = x, y = y, z = z}
end
local function get_v(v)
return sqrt(v.x * v.x + v.z * v.z)
end
local function force_detach(player)
local attached_to = player:get_attach()
if not attached_to then
return
end
local entity = attached_to:get_luaentity()
if entity and entity.driver
and entity.driver == player then
entity.driver = nil
end
player:set_detach()
player_api.player_attached[player:get_player_name()] = false
player:set_eye_offset({x = 0, y = 0, z = 0}, {x = 0, y = 0, z = 0})
player_api.set_animation(player, "stand", 30)
player:set_properties({visual_size = {x = 1, y = 1}})
end
-------------------------------------------------------------------------------
minetest.register_on_leaveplayer(function(player)
force_detach(player)
end)
minetest.register_on_shutdown(function()
local players = minetest.get_connected_players()
for i = 1, #players do
force_detach(players[i])
end
end)
minetest.register_on_dieplayer(function(player)
force_detach(player)
return true
end)
-------------------------------------------------------------------------------
-- Just for correct detaching
local function find_free_pos(pos)
local check = {
{x = 1, y = 0, z = 0},
{x = 1, y = 1, z = 0},
{x = -1, y = 0, z = 0},
{x = -1, y = 1, z = 0},
{x = 0, y = 0, z = 1},
{x = 0, y = 1, z = 1},
{x = 0, y = 0, z = -1},
{x = 0, y = 1, z = -1}
}
for _, c in pairs(check) do
local npos = {x = pos.x + c.x, y = pos.y + c.y, z = pos.z + c.z}
local node = minetest.get_node_or_nil(npos)
if node and node.name then
local def = minetest.registered_nodes[node.name]
if def and not def.walkable and
def.liquidtype == "none" then
return npos
end
end
end
return pos
end
-------------------------------------------------------------------------------
function mobs.attach(entity, player)
entity.player_rotation = entity.player_rotation or {x = 0, y = 0, z = 0}
entity.driver_attach_at = entity.driver_attach_at or {x = 0, y = 0, z = 0}
entity.driver_eye_offset = entity.driver_eye_offset or {x = 0, y = 0, z = 0}
entity.driver_scale = entity.driver_scale or {x = 1, y = 1}
local rot_view = 0
if entity.player_rotation.y == 90 then
rot_view = pi / 2
end
local attach_at = entity.driver_attach_at
local eye_offset = entity.driver_eye_offset
entity.driver = player
force_detach(player)
player:set_attach(entity.object, "", attach_at, entity.player_rotation)
player_api.player_attached[player:get_player_name()] = true
player:set_eye_offset(eye_offset, {x = 0, y = 0, z = 0})
player:set_properties({
visual_size = {
x = entity.driver_scale.x,
y = entity.driver_scale.y
}
})
minetest.after(0.2, function()
if player and player:is_player() then
player_api.set_animation(player, "sit", 30)
end
end)
player:set_look_horizontal(entity.object:get_yaw() - rot_view)
end
function mobs.detach(player)
force_detach(player)
minetest.after(0.1, function()
if player and player:is_player() then
local pos = find_free_pos(player:get_pos())
pos.y = pos.y + 0.5
player:set_pos(pos)
end
end)
end
function mobs.drive(entity, moving_anim, stand_anim, can_fly, dtime)
local yaw = entity.object:get_yaw() or 0
local rot_view = 0
if entity.player_rotation.y == 90 then
rot_view = pi / 2
end
local acce_y = 0
local velo = entity.object:get_velocity()
entity.v = get_v(velo) * get_sign(entity.v)
-- process controls
if entity.driver then
local ctrl = entity.driver:get_player_control()
-- move forwards
if ctrl.up then
entity.v = entity.v + entity.accel / 10
-- move backwards
elseif ctrl.down then
if entity.max_speed_reverse == 0 and entity.v == 0 then
return
end
entity.v = entity.v - entity.accel / 10
end
-- mob rotation
local horz
if entity.alt_turn == true then
horz = yaw
if ctrl.left then
horz = horz + 0.05
elseif ctrl.right then
horz = horz - 0.05
end
else
horz = entity.driver:get_look_horizontal() or 0
end
entity.object:set_yaw(horz - entity.rotate)
if can_fly then
-- fly up
if ctrl.jump then
velo.y = velo.y + 1
if velo.y > entity.accel then velo.y = entity.accel end
elseif velo.y > 0 then
velo.y = velo.y - 0.1
if velo.y < 0 then velo.y = 0 end
end
-- fly down
if ctrl.sneak then
velo.y = velo.y - 1
if velo.y < -entity.accel then velo.y = -entity.accel end
elseif velo.y < 0 then
velo.y = velo.y + 0.1
if velo.y > 0 then velo.y = 0 end
end
else
-- jump
if ctrl.jump then
if velo.y == 0 then
velo.y = velo.y + entity.jump_height
acce_y = acce_y + (acce_y * 3) + 1
end
end
end
end
-- if not moving then set animation and return
if entity.v == 0 and velo.x == 0 and velo.y == 0 and velo.z == 0 then
if stand_anim then
mobs:set_animation(entity, stand_anim)
end
return
end
-- set moving animation
if moving_anim then
mobs:set_animation(entity, moving_anim)
end
-- Stop!
local s = get_sign(entity.v)
entity.v = entity.v - 0.02 * s
if s ~= get_sign(entity.v) then
entity.object:set_velocity({x = 0, y = 0, z = 0})
entity.v = 0
return
end
-- enforce speed limit forward and reverse
local max_spd = entity.max_speed_reverse
if get_sign(entity.v) >= 0 then
max_spd = entity.max_speed_forward
end
if abs(entity.v) > max_spd then
entity.v = entity.v - get_sign(entity.v)
end
-- Set position, velocity and acceleration
local p = entity.object:get_pos()
if not p then return end
local new_acce = {x = 0, y = -9.81, z = 0}
p.y = p.y - 0.5
local ni = node_is(p)
local v = entity.v
if ni == "air" then
if can_fly == true then
new_acce.y = 0
end
elseif ni == "liquid" or ni == "lava" then
if ni == "lava" and entity.lava_damage ~= 0 then
entity.lava_counter = (entity.lava_counter or 0) + dtime
if entity.lava_counter > 1 then
minetest.sound_play("default_punch", {
object = entity.object,
max_hear_distance = 5
}, true)
entity.object:punch(entity.object, 1.0, {
full_punch_interval = 1.0,
damage_groups = {fleshy = entity.lava_damage}
}, nil)
entity.lava_counter = 0
end
end
local terrain_type = entity.terrain_type
if terrain_type == 2 or terrain_type == 3 then
new_acce.y = 0
p.y = p.y + 1
if node_is(p) == "liquid" then
if velo.y >= 5 then
velo.y = 5
elseif velo.y < 0 then
new_acce.y = 20
else
new_acce.y = 5
end
else
if abs(velo.y) < 1 then
local pos = entity.object:get_pos()
if not pos then return end
pos.y = floor(pos.y) + 0.5
entity.object:set_pos(pos)
velo.y = 0
end
end
else
v = v * 0.25
end
end
local new_velo = get_velocity(v, yaw - rot_view, velo.y)
new_acce.y = new_acce.y + acce_y
entity.object:set_velocity(new_velo)
entity.object:set_acceleration(new_acce)
entity.v2 = v
end
-- directional flying routine by D00Med (edited by TenPlus1)
function mobs.fly(entity, _, speed, shoots, arrow, moving_anim, stand_anim)
local ctrl = entity.driver:get_player_control()
local velo = entity.object:get_velocity()
local dir = entity.driver:get_look_dir()
local yaw = entity.driver:get_look_horizontal() + 1.57 -- offset fix between old and new commands
if not ctrl or not velo then return end
if ctrl.up then
entity.object:set_velocity({
x = dir.x * speed,
y = dir.y * speed + 2,
z = dir.z * speed
})
elseif ctrl.down then
entity.object:set_velocity({
x = -dir.x * speed,
y = dir.y * speed + 2,
z = -dir.z * speed
})
elseif not ctrl.down or ctrl.up or ctrl.jump then
entity.object:set_velocity({x = 0, y = -2, z = 0})
end
entity.object:set_yaw(yaw + pi + pi / 2 - entity.rotate)
-- firing arrows
if ctrl.LMB and ctrl.sneak and shoots then
local pos = entity.object:get_pos()
local obj = minetest.add_entity({
x = pos.x + 0 + dir.x * 2.5,
y = pos.y + 1.5 + dir.y,
z = pos.z + 0 + dir.z * 2.5}, arrow)
local ent = obj:get_luaentity()
if ent then
ent.switch = 1 -- for mob specific arrows
ent.owner_id = tostring(entity.object) -- so arrows dont hurt entity you are riding
local vec = {x = dir.x * 6, y = dir.y * 6, z = dir.z * 6}
yaw = entity.driver:get_look_horizontal()
obj:set_yaw(yaw + pi / 2)
obj:set_velocity(vec)
else
obj:remove()
end
end
-- change animation if stopped
if velo.x == 0 and velo.y == 0 and velo.z == 0 then
mobs:set_animation(entity, stand_anim)
else
-- moving animation
mobs:set_animation(entity, moving_anim)
end
end