485 lines
14 KiB
Lua
485 lines
14 KiB
Lua
--------------
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-- Creatura --
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--------------
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creatura.api = {}
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-- Math --
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local pi = math.pi
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local pi2 = pi * 2
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local abs = math.abs
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local floor = math.floor
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local random = math.random
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local sin = math.sin
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local cos = math.cos
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local atan2 = math.atan2
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local function diff(a, b) -- Get difference between 2 angles
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return math.atan2(math.sin(b - a), math.cos(b - a))
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end
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local function clamp(val, min, max)
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if val < min then
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val = min
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elseif max < val then
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val = max
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end
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return val
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end
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local vec_dir = vector.direction
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local vec_dist = vector.distance
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local vec_multi = vector.multiply
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local vec_sub = vector.subtract
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local vec_add = vector.add
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local function vec_center(v)
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return {x = floor(v.x + 0.5), y = floor(v.y + 0.5), z = floor(v.z + 0.5)}
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end
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local function vec_raise(v, n)
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if not v then return end
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return {x = v.x, y = v.y + n, z = v.z}
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end
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local function dist_2d(pos1, pos2)
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local a = {x = pos1.x, y = 0, z = pos1.z}
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local b = {x = pos2.x, y = 0, z = pos2.z}
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return vec_dist(a, b)
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end
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---------------
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-- Local API --
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---------------
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local function get_node_height(pos)
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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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if not def then return nil end
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if def.walkable then
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if def.drawtype == "nodebox" then
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if def.node_box
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and def.node_box.type == "fixed" then
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if type(def.node_box.fixed[1]) == "number" then
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return pos.y + node.node_box.fixed[5]
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elseif type(node.node_box.fixed[1]) == "table" then
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return pos.y + node.node_box.fixed[1][5]
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else
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return pos.y + 0.5
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end
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elseif node.node_box
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and node.node_box.type == 'leveled' then
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return minetest.get_node_level(pos) / 64 - 0.5 + pos.y
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else
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return pos.y + 0.5
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end
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else
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return pos.y + 0.5
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end
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else
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return pos.y - 0.5
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end
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end
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local function walkable(pos)
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return minetest.registered_nodes[minetest.get_node(pos).name].walkable
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end
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local function is_under_solid(pos)
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local pos2 = vector.new(pos.x, pos.y + 1, pos.z)
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return (walkable(pos2) or ((get_node_height(pos2) or 0) < 1.5))
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end
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local function is_node_walkable(name)
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local def = minetest.registered_nodes[name]
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return def and def.walkable
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end
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local function is_value_in_table(tbl, val)
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for _, v in pairs(tbl) do
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if v == val then
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return true
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end
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end
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return false
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end
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-----------------------
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-- Utility Functions --
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-----------------------
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-- Movement Methods --
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creatura.registered_movement_methods = {}
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function creatura.register_movement_method(name, func)
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creatura.registered_movement_methods[name] = func
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end
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-- Utility Behaviors --
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creatura.registered_utilities = {}
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function creatura.register_utility(name, func)
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creatura.registered_utilities[name] = func
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end
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-- Sensors --
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function creatura.is_pos_moveable(pos, width, height)
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local pos1 = {
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x = pos.x - (width + 0.2),
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y = pos.y,
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z = pos.z - (width + 0.2),
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}
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local pos2 = {
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x = pos.x + (width + 0.2),
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y = pos.y,
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z = pos.z + (width + 0.2),
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}
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for z = pos1.z, pos2.z do
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for x = pos1.x, pos2.x do
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local pos3 = {x = x, y = pos.y + height, z = z}
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local pos4 = {x = x, y = pos.y + 0.01, z = z}
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local ray = minetest.raycast(pos3, pos4, false, false)
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for pointed_thing in ray do
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if pointed_thing.type == "node" then
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local name = minetest.get_node(pointed_thing.under).name
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if minetest.registered_nodes[name].walkable then
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return false
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end
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end
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end
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end
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end
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return true
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end
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local moveable = creatura.is_pos_moveable
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function creatura.fast_ray_sight(pos1, pos2, water)
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local ray = minetest.raycast(pos1, pos2, false, water or false)
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for pointed_thing in ray do
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if pointed_thing.type == "node" then
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return false, vec_dist(pos1, pointed_thing.intersection_point), pointed_thing.ref
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end
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end
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return true, vec_dist(pos1, pos2)
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end
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local fast_ray_sight = creatura.fast_ray_sight
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function creatura.get_next_move(self, pos2)
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local last_move = self._movement_data.last_move
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local width = self.width
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local height = self.height
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local pos = self.object:get_pos()
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pos = {
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x = floor(pos.x),
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y = pos.y + 0.01,
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z = floor(pos.z)
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}
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pos.y = pos.y + 0.01
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if last_move
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and last_move.pos then
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local last_call = minetest.get_position_from_hash(last_move.pos)
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local last_move = minetest.get_position_from_hash(last_move.move)
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if vector.equals(vec_center(last_call), vec_center(pos)) then
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return last_move
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end
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end
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local neighbors = {
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vec_add(pos, {x = 1, y = 0, z = 0}),
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vec_add(pos, {x = 1, y = 0, z = 1}),
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vec_add(pos, {x = 0, y = 0, z = 1}),
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vec_add(pos, {x = -1, y = 0, z = 1}),
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vec_add(pos, {x = -1, y = 0, z = 0}),
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vec_add(pos, {x = -1, y = 0, z = -1}),
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vec_add(pos, {x = 0, y = 0, z = -1}),
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vec_add(pos, {x = 1, y = 0, z = -1})
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}
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local _next
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table.sort(neighbors, function(a, b)
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return vec_dist(a, pos2) < vec_dist(b, pos2)
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end)
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for i = 1, #neighbors do
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local neighbor = neighbors[i]
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local can_move = fast_ray_sight(pos, neighbor)
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if vector.equals(neighbor, pos2) then
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can_move = true
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end
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if can_move
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and not moveable(neighbor, width, height) then
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can_move = false
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if moveable(vec_raise(neighbor, 0.5), width, height) then
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can_move = true
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end
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end
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if can_move
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and not self:is_pos_safe(neighbor) then
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can_move = false
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end
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if can_move then
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_next = vec_raise(neighbor, 0.1)
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break
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end
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end
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if _next then
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self._movement_data.last_move = {
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pos = minetest.hash_node_position(pos),
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move = minetest.hash_node_position(_next)
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}
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_next = {
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x = floor(_next.x),
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y = _next.y,
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z = floor(_next.z)
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}
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end
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return _next
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end
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function creatura.get_next_move_3d(self, pos2)
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local last_move = self._movement_data.last_move
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local width = self.width
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local height = self.height
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local scan_width = width * 2
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local pos = self.object:get_pos()
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pos.y = pos.y + 0.5
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if last_move
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and last_move.pos then
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local last_call = minetest.get_position_from_hash(last_move.pos)
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local last_move = minetest.get_position_from_hash(last_move.move)
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if vector.equals(vec_center(last_call), vec_center(pos)) then
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return last_move
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end
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end
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local neighbors = {
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vec_add(pos, {x = scan_width, y = 0, z = 0}),
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vec_add(pos, {x = scan_width, y = 0, z = scan_width}),
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vec_add(pos, {x = 0, y = 0, z = scan_width}),
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vec_add(pos, {x = -scan_width, y = 0, z = scan_width}),
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vec_add(pos, {x = -scan_width, y = 0, z = 0}),
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vec_add(pos, {x = -scan_width, y = 0, z = -scan_width}),
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vec_add(pos, {x = 0, y = 0, z = -scan_width}),
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vec_add(pos, {x = scan_width, y = 0, z = -scan_width})
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}
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local next
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table.sort(neighbors, function(a, b)
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return vec_dist(a, pos2) < vec_dist(b, pos2)
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end)
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for i = 1, #neighbors do
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local neighbor = neighbors[i]
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local can_move = fast_ray_sight({x = pos.x, y = neighbor.y, z = pos.z}, neighbor)
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if not moveable(vec_raise(neighbor, 0.6), width, height) then
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can_move = false
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end
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if vector.equals(neighbor, pos2) then
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can_move = true
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end
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local dist = vec_dist(neighbor, pos2)
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if can_move then
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next = neighbor
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break
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end
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end
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if next then
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self._movement_data.last_move = {
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pos = minetest.hash_node_position(pos),
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move = minetest.hash_node_position(next)
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}
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end
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return vec_raise(next, clamp((pos2.y - pos.y) + -0.6, -1, 1))
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end
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function creatura.sensor_floor(self, range, water)
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local pos = self.object:get_pos()
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local pos2 = vec_raise(pos, -range)
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local _, dist, node = fast_ray_sight(pos, pos2, water or false)
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return dist, node
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end
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function creatura.sensor_ceil(self, range, water)
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local pos = vec_raise(self.object:get_pos(), self.height)
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local pos2 = vec_raise(pos, range)
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local _, dist, node = fast_ray_sight(pos, pos2, water or false)
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return dist, node
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end
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-- Misc
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function creatura.is_valid(mob)
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if not mob then return false end
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if type(mob) == "table" then mob = mob.object end
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if type(mob) == "userdata" then
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if mob:is_player() then
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if mob:get_look_horizontal() then return mob end
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else
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if mob:get_yaw() then return mob end
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end
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end
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return false
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end
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function creatura.is_alive(mob)
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if not creatura.is_valid(mob) then
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return false
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end
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if type(mob) == "table" then
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return mob.hp > 0
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end
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if mob:is_player() then
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return mob:get_hp() > 0
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else
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local ent = mob:get_luaentity()
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return ent and ent.hp and ent.hp > 0
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end
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end
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function creatura.get_nearby_player(self)
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local objects = minetest.get_objects_inside_radius(self:get_center_pos(), self.tracking_range)
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for _, object in ipairs(objects) do
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if object:is_player()
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and creatura.is_alive(object) then
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return object
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end
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end
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end
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function creatura.get_nearby_players(self)
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local objects = minetest.get_objects_inside_radius(self:get_center_pos(), self.tracking_range)
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local nearby = {}
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for _, object in ipairs(objects) do
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if object:is_player()
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and creatura.is_alive(object) then
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table.insert(nearby, object)
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end
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end
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return nearby
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end
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function creatura.get_nearby_entity(self, name)
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local objects = minetest.get_objects_inside_radius(self:get_center_pos(), self.tracking_range)
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for _, object in ipairs(objects) do
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if creatura.is_alive(object)
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and not object:is_player()
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and object ~= self.object
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and object:get_luaentity().name == name then
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return object
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end
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end
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return
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end
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function creatura.get_nearby_entities(self, name)
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local objects = minetest.get_objects_inside_radius(self:get_center_pos(), self.tracking_range)
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local nearby = {}
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for _, object in ipairs(objects) do
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if creatura.is_alive(object)
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and not object:is_player()
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and object ~= self.object
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and object:get_luaentity().name == name then
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table.insert(nearby, object)
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end
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end
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return nearby
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end
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local default_node_def = {walkable = true} -- both ignore and unknown nodes are walkable
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function minetest.get_node_height_from_def(name)
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local def = minetest.registered_nodes[name]
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if not def then return 0.5 end
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if def.walkable then
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if def.drawtype == "nodebox" then
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if def.node_box
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and def.node_box.type == "fixed" then
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if type(def.node_box.fixed[1]) == "number" then
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return 0.5 + def.node_box.fixed[5]
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elseif type(def.node_box.fixed[1]) == "table" then
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return 0.5 + def.node_box.fixed[1][5]
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else
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return 1
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end
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else
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return 1
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end
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else
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return 1
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end
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else
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return 1
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end
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end
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function creatura.get_node_def(node) -- Node can be name or pos
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if type(node) == "table" then
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node = minetest.get_node(node).name
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end
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local def = minetest.registered_nodes[node] or default_node_def
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if def.walkable
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and minetest.get_node_height_from_def(node) < 0.26 then
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def.walkable = false -- workaround for nodes like snow
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end
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return def
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end
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--------------------
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-- Global Mob API --
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--------------------
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-- Drops --
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function creatura.drop_items(self)
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if not self.drops then return end
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for i = 1, #self.drops do
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local drop_def = self.drops[i]
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local name = drop_def.name
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if not name then return end
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local min_amount = drop_def.min or 1
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local max_amount = drop_def.max or 2
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local chance = drop_def.chance or 1
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local amount = random(min_amount, max_amount)
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if random(chance) < 2 then
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local pos = self.object:get_pos()
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local item = minetest.add_item(pos, ItemStack(name .. " " .. amount))
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if item then
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item:add_velocity({
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x = random(-2, 2),
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y = 1.5,
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z = random(-2, 2)
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})
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end
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end
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end
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end
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-- On Punch --
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function creatura.basic_punch_func(self, puncher, time_from_last_punch, tool_capabilities, direction, damage)
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if not puncher then return end
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local tool = ""
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if puncher:is_player() then
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tool = puncher:get_wielded_item():get_name()
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end
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if (self.immune_to
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and is_value_in_table(self.immune_to, tool)) then
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return
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end
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local dir = vec_dir(puncher:get_pos(), self:get_center_pos())
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self:apply_knockback(dir)
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self:hurt(tool_capabilities.damage_groups.fleshy or 2)
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if random(4) < 2 then
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self:play_sound("hurt")
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end
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if time_from_last_punch > 0.5 then
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self:play_sound("hit")
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end
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self:indicate_damage()
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end
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local path = minetest.get_modpath("creatura")
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dofile(path.."/mob_meta.lua")
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