1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
minetest.register_entity("pong:ball", {
hp_max = 1,
physical = false,
collide_with_objects = false,
visual = "cube",
visual_size = {x = 0.25, y = 0.25},
textures = {
"default_cloud.png", "default_cloud.png", "default_cloud.png",
"default_cloud.png", "default_cloud.png", "default_cloud.png",
},
velocity = {x=math.random(-1,1), y=0, z=math.random(-1,1)},
direction = {x=1, y=0, z=1},
collisionbox = {-0.25, -0.25, -0.25, 0.25, 0.25, 0.25},
is_visible = true,
automatic_rotate = false,
makes_footstep_sound = false,
speed = 4,
update_velocity = function(self, direction)
if not self.speed then self.speed = 0 end
if not direction then
local yaw = self.object:getyaw()
self.direction = {x= -math.sin(yaw), y=0, z=math.cos(yaw)}
else
self.direction = direction
end
self.object:setvelocity(vector.multiply(self.direction, self.speed))
end,
on_player_collision = function(self, player)
local yaw = self.object:getyaw()
local pos = self.object:getpos()
local playerpos = player:getpos()
local playerdir = vector.direction(playerpos,pos)
playerdir.y = 0
local v = self.object:getvelocity()
if v.x < 1 and v.z < 1 then
self:update_velocity(playerdir)
return
end
--[[
if math.sign(playerdir.x) ~= math.sign(self.direction.x) then
self.direction.x = -self.direction.x
self:update_velocity(self.direction)
else
self.direction.z = -self.direction.z
self:update_velocity(self.direction)
end
--]]
if math.sign(playerdir.x) ~= math.sign(self.direction.x) then
self.object:setyaw((yaw + 90)%360)
elseif pos.z < playerpos.z then
self.object:setyaw((yaw - 90)%360)
end
self:update_velocity()
end,
on_step = function(self, dtime)
-- every 0.2 seconds
self.timer = (self.timer or 0) + dtime
if self.timer < 0.2 then return end
self.timer = 0
local pos = self.object:getpos()
local p = vector.add(pos, self.direction)
if p.x <= self.minp.x or p.x >= self.maxp.x then
self.direction.x = -self.direction.x
self:update_velocity(self.direction)
elseif p.z <= self.minp.z or p.z >= self.maxp.z then
self.direction.z = -self.direction.z
self:update_velocity(self.direction)
else
for _,obj in pairs(minetest.get_objects_inside_radius(pos,1)) do
if obj:is_player() == true then
self:on_player_collision(obj)
break
end
end
end
end,
-- This function should return the saved state of the entity in a string
get_staticdata = function(self)
return minetest.serialize({minp = self.minp, maxp = self.maxp})
end,
-- This function should load the saved state of the entity from a string
on_activate = function(self, staticdata)
self.object:set_armor_groups({immortal=1})
self.direction = vector.normalize(self.object:getvelocity())
if staticdata and staticdata ~= "" then
staticdata = minetest.deserialize(staticdata)
self.minp = staticdata.minp
self.maxp = staticdata.maxp
end
end
})
|
