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local function color(hex)
return ("blank.png^[noalpha^[colorize:#%06X:255"):format(hex)
end
local function random_color()
return color(math.random(0, 0xFFFFFF))
end
local function random_rotation()
return 2 * math.pi * vector.new(math.random(), math.random(), math.random())
end
local active_selectionbox_entities = 0 -- count active entities
minetest.register_entity("testentities:selectionbox", {
initial_properties = {
visual = "cube",
infotext = "Punch to randomize rotation, rightclick to toggle rotation"
},
on_activate = function(self)
active_selectionbox_entities = active_selectionbox_entities + 1
local w, h, l = math.random(), math.random(), math.random()
self.object:set_properties({
textures = {random_color(), random_color(), random_color(), random_color(), random_color(), random_color()},
selectionbox = {rotate = true, -w/2, -h/2, -l/2, w/2, h/2, l/2},
visual_size = vector.new(w, h, l),
automatic_rotate = 2 * math.pi * (math.random() - 0.5)
})
assert(self.object:get_properties().selectionbox.rotate)
self.object:set_armor_groups({punch_operable = 1})
self.object:set_rotation(random_rotation())
end,
on_deactivate = function()
active_selectionbox_entities = active_selectionbox_entities - 1
end,
on_punch = function(self)
self.object:set_rotation(random_rotation())
end,
on_rightclick = function(self)
self.object:set_properties({
automatic_rotate = self.object:get_properties().automatic_rotate == 0 and 2 * math.pi * (math.random() - 0.5) or 0
})
end
})
local hud_ids = {}
minetest.register_globalstep(function()
if active_selectionbox_entities == 0 then
return
end
for _, player in pairs(minetest.get_connected_players()) do
local offset = player:get_eye_offset()
offset.y = offset.y + player:get_properties().eye_height
local pos1 = vector.add(player:get_pos(), offset)
local raycast = minetest.raycast(pos1, vector.add(pos1, vector.multiply(player:get_look_dir(), 10)), true, false)
local pointed_thing = raycast()
if pointed_thing.ref == player then
pointed_thing = raycast()
end
local remove_hud_element = true
local pname = player:get_player_name()
local hud_id = hud_ids[pname]
if pointed_thing and pointed_thing.type == "object" then
local ent = pointed_thing.ref:get_luaentity()
if ent and ent.name == "testentities:selectionbox" then
hud_ids[pname] = hud_id or player:hud_add({
hud_elem_type = "text", -- See HUD element types
position = {x=0.5, y=0.5},
text = "X",
number = 0xFF0000,
alignment = {x=0, y=0},
})
local shade = math.random(0, 0xFF)
minetest.add_particle({
-- Random shade of red for the intersection point
texture = color(0x10000 * shade),
pos = pointed_thing.intersection_point,
size = 0.1
})
minetest.add_particle({
-- Same shade of green for the corresponding intersection normal
texture = color(0x100 * shade),
pos = vector.add(pointed_thing.intersection_point, pointed_thing.intersection_normal * 0.1),
size = 0.1
})
remove_hud_element = false
end
end
if remove_hud_element and hud_id then
player:hud_remove(hud_id)
hud_ids[pname] = nil
end
end
end)
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