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MineClone2/mods/ENTITIES/mcl_mobs/api/mob_functions/movement.lua

101 lines
2.4 KiB
Lua

local math_pi = math.pi
local math_sin = math.sin
local math_cos = math.cos
local math_random = math.random
local DOUBLE_PI = math_pi * 2
-- localize vector functions
local vector_new = vector.new
local vector_length = vector.length
local vector_multiply = vector.multiply
local minetest_yaw_to_dir = minetest.yaw_to_dir
-- move mob in facing direction
--this has been modified to be internal
--internal = lua (self.yaw)
--engine = c++ (self.object:get_yaw())
mobs.set_velocity = function(self, v)
local yaw = (self.yaw or 0)
local current_velocity = self.object:get_velocity()
local goal_velocity = {
x = (math_sin(yaw) * -v),
y = 0,
z = (math_cos(yaw) * v),
}
local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
if vector_length(new_velocity_addition) > vector_length(goal_velocity) then
vector.multiply(new_velocity_addition, (vector_length(goal_velocity) / vector_length(new_velocity_addition)))
end
new_velocity_addition.y = 0
--smooths out mobs a bit
if vector_length(new_velocity_addition) >= 0.0001 then
self.object:add_velocity(new_velocity_addition)
end
end
-- calculate mob velocity
mobs.get_velocity = function(self)
local v = self.object:get_velocity()
v.y = 0
if v then
return vector_length(v)
end
return 0
end
--make mobs jump
mobs.jump = function(self, velocity)
if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
return
end
--fallback velocity to allow modularity
velocity = velocity or 8
self.object:add_velocity(vector_new(0,velocity,0))
end
--make mobs flop
mobs.flop = function(self, velocity)
if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
return false
end
mobs.set_velocity(self, 0)
--fallback velocity to allow modularity
velocity = velocity or 8
--create a random direction (2d yaw)
local dir = DOUBLE_PI * math_random()
--create a random force value
local force = math_random(0,3) + math_random()
--convert the yaw to a direction vector then multiply it times the force
local final_additional_force = vector_multiply(minetest_yaw_to_dir(dir), force)
--place in the "flop" velocity to make the mob flop
final_additional_force.y = velocity
self.object:add_velocity(final_additional_force)
return true
end