mirror of
https://git.minetest.land/VoxeLibre/VoxeLibre.git
synced 2024-09-14 01:22:11 +02:00
164 lines
3.6 KiB
Lua
164 lines
3.6 KiB
Lua
local math_pi = math.pi
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local math_sin = math.sin
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local math_cos = math.cos
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local math_random = math.random
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local DOUBLE_PI = math_pi * 2
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-- localize vector functions
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local vector_new = vector.new
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local vector_length = vector.length
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local vector_multiply = vector.multiply
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local minetest_yaw_to_dir = minetest.yaw_to_dir
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--[[
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_ _
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| | | |
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| | __ _ _ __ __| |
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| | / _` | '_ \ / _` |
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| |___| (_| | | | | (_| |
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\_____/\__,_|_| |_|\__,_|
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]]
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-- move mob in facing direction
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--this has been modified to be internal
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--internal = lua (self.yaw)
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--engine = c++ (self.object:get_yaw())
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mobs.set_velocity = function(self, v)
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local yaw = (self.yaw or 0)
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local current_velocity = self.object:get_velocity()
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local goal_velocity = {
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x = (math_sin(yaw) * -v),
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y = 0,
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z = (math_cos(yaw) * v),
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}
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local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
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if vector_length(new_velocity_addition) > vector_length(goal_velocity) then
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vector.multiply(new_velocity_addition, (vector_length(goal_velocity) / vector_length(new_velocity_addition)))
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end
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new_velocity_addition.y = 0
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--smooths out mobs a bit
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if vector_length(new_velocity_addition) >= 0.0001 then
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self.object:add_velocity(new_velocity_addition)
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end
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end
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-- calculate mob velocity
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mobs.get_velocity = function(self)
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local v = self.object:get_velocity()
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v.y = 0
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if v then
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return vector_length(v)
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end
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return 0
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end
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--make mobs jump
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mobs.jump = function(self, velocity)
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if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
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return
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end
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--fallback velocity to allow modularity
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velocity = velocity or 8
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self.object:add_velocity(vector_new(0,velocity,0))
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end
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--[[
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_____ _
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/ ___| (_)
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\ `--.__ ___ _ __ ___
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`--. \ \ /\ / / | '_ ` _ \
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/\__/ /\ V V /| | | | | | |
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\____/ \_/\_/ |_|_| |_| |_|
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]]--
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--make mobs flop
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mobs.flop = function(self, velocity)
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if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
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return false
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end
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mobs.set_velocity(self, 0)
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--fallback velocity to allow modularity
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velocity = velocity or 8
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--create a random direction (2d yaw)
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local dir = DOUBLE_PI * math_random()
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--create a random force value
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local force = math_random(0,3) + math_random()
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--convert the yaw to a direction vector then multiply it times the force
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local final_additional_force = vector_multiply(minetest_yaw_to_dir(dir), force)
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--place in the "flop" velocity to make the mob flop
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final_additional_force.y = velocity
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self.object:add_velocity(final_additional_force)
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return true
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end
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-- move mob in facing direction
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--this has been modified to be internal
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--internal = lua (self.yaw)
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--engine = c++ (self.object:get_yaw())
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mobs.set_swim_velocity = function(self, v)
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local yaw = (self.yaw or 0)
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local pitch = (self.pitch or 0)
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if v == 0 then
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pitch = 0
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end
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local current_velocity = self.object:get_velocity()
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local goal_velocity = {
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x = (math_sin(yaw) * -v),
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y = pitch,
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z = (math_cos(yaw) * v),
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}
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local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
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if vector_length(new_velocity_addition) > vector_length(goal_velocity) then
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vector.multiply(new_velocity_addition, (vector_length(goal_velocity) / vector_length(new_velocity_addition)))
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end
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--smooths out mobs a bit
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if vector_length(new_velocity_addition) >= 0.0001 then
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self.object:add_velocity(new_velocity_addition)
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end
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end |