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digiscreen = {}
function digiscreen.removeEntity(pos)
local entitiesNearby = core.get_objects_inside_radius(pos,0.5)
for _,i in pairs(entitiesNearby) do
if i:get_luaentity() and i:get_luaentity().name == "digiscreen:image" then
i:remove()
end
end
end
function digiscreen.processDigilinesMessage(pos,msg)
local data = {}
for y=1,16,1 do
data[y] = {}
if type(msg[y]) ~= "table" then msg[y] = {} end
for x=1,16,1 do
if type(msg[y][x]) == "string" and string.len(msg[y][x]) == 7 and string.sub(msg[y][x],1,1) == "#" then
msg[y][x] = string.sub(msg[y][x],2,-1)
end
if type(msg[y][x]) ~= "string" or string.len(msg[y][x]) ~= 6 then msg[y][x] = "000000" end
msg[y][x] = string.upper(msg[y][x])
for i=1,6,1 do
if not tonumber(string.sub(msg[y][x],i,i),16) then
msg[y][x] = "000000"
end
end
data[y][x] = msg[y][x]
end
end
local bincolors = ""
for y=1,16,1 do
if type(data[y]) ~= "table" then data[y] = {} end
for x=1,16,1 do
local colorspec = 0
if data[y][x] then
colorspec = tonumber(data[y][x],16) or 0
end
colorspec = 0xFF000000 + colorspec
bincolors = bincolors..core.colorspec_to_bytes(colorspec)
end
end
local img = core.encode_png(16,16,bincolors,1)
return pos,"[png:"..core.encode_base64(img),bincolors
end
function digiscreen.updateDisplay(pos)
digiscreen.removeEntity(pos)
local meta = core.get_meta(pos)
local texture = meta:get_string("texture")
if (not texture) or texture == "" then
local oldData = meta:get_string("data")
if oldData and string.len(oldData) > 1 then
oldData = core.deserialize(oldData)
if not oldData then return end
core.handle_async(digiscreen.processDigilinesMessage,digiscreen.asyncDone,pos,oldData)
return
end
end
local entity = core.add_entity(pos,"digiscreen:image")
local fdir = core.facedir_to_dir(core.get_node(pos).param2)
entity:set_properties({textures={texture}})
entity:set_yaw((fdir.x ~= 0) and math.pi/2 or 0)
entity:set_pos(vector.add(pos,vector.multiply(fdir,0.39)))
end
function digiscreen.asyncDone(pos,texture,bincolors)
local node = core.get_node(pos)
if node.name ~= "digiscreen:digiscreen" then return end
local meta = core.get_meta(pos)
meta:set_string("data","")
meta:set_string("bincolors",bincolors)
meta:set_string("texture",texture)
meta:mark_as_private({"data","bincolors","texture"})
digiscreen.updateDisplay(pos)
core.get_node_timer(pos):start(5)
end
function digiscreen.recompress(pos,bincolors)
if string.len(bincolors) ~= 1024 then return false end
local img = core.encode_png(16,16,bincolors,9)
return true,pos,"[png:"..core.encode_base64(img)
end
function digiscreen.recompressDone(ok,pos,texture)
if not ok then return end
local node = core.get_node(pos)
if node.name ~= "digiscreen:digiscreen" then return end
local meta = core.get_meta(pos)
meta:set_string("bincolors","")
meta:set_string("texture",texture)
meta:mark_as_private({"bincolors","texture"})
digiscreen.updateDisplay(pos)
end
core.register_entity("digiscreen:image",{
initial_properties = {
visual = "upright_sprite",
physical = false,
collisionbox = {0,0,0,0,0,0,},
textures = {"digiscreen_pixel.png",},
glow = 14,
shaded = true,
static_save = false,
},
})
core.register_node("digiscreen:digiscreen",{
description = "Digilines Graphical Display",
tiles = {"digiscreen_pixel.png",},
groups = {cracky = 3,},
paramtype = "light",
paramtype2 = "facedir",
on_rotate = core.global_exists("screwdriver") and screwdriver.rotate_simple,
drawtype = "nodebox",
node_box = {
type = "fixed",
fixed = {-0.5,-0.5,0.4,0.5,0.5,0.5},
},
_digistuff_channelcopier_fieldname = "channel",
light_source = 10,
on_construct = function(pos)
local meta = core.get_meta(pos)
meta:set_string("formspec","field[channel;Channel;${channel}]")
local disp = {}
for y=1,16,1 do
disp[y] = {}
for x=1,16,1 do
disp[y][x] = "000000"
end
end
meta:set_string("data",core.serialize(disp))
meta:mark_as_private("data")
digiscreen.updateDisplay(pos)
end,
on_destruct = digiscreen.removeEntity,
on_receive_fields = function(pos,_,fields,sender)
local name = sender:get_player_name()
if not fields.channel then return end
if core.is_protected(pos,name) and not core.check_player_privs(name,"protection_bypass") then
core.record_protection_violation(pos,name)
return
end
local meta = core.get_meta(pos)
meta:set_string("channel",fields.channel)
end,
on_punch = function(screenpos,_,player)
if player and not player.is_fake_player then
local eyepos = vector.add(player:get_pos(),vector.add(player:get_eye_offset(),vector.new(0,1.5,0)))
local lookdir = player:get_look_dir()
local distance = vector.distance(eyepos,screenpos)
local endpos = vector.add(eyepos,vector.multiply(lookdir,distance+1))
local ray = core.raycast(eyepos,endpos,true,false)
local pointed,screen,hitpos
repeat
pointed = ray:next()
if pointed and pointed.type == "node" then
local node = core.get_node(pointed.under)
if node.name == "digiscreen:digiscreen" then
screen = pointed.under
hitpos = vector.subtract(pointed.intersection_point,screen)
end
end
until screen or not pointed
if not hitpos then return end
local facedir = core.facedir_to_dir(core.get_node(screen).param2)
if facedir.x > 0 then
hitpos.x = -1*hitpos.z
elseif facedir.x < 0 then
hitpos.x = hitpos.z
elseif facedir.z < 0 then
hitpos.x = -1*hitpos.x
end
hitpos.y = -1*hitpos.y
local hitpixel = {}
hitpixel.x = math.floor((hitpos.x+0.5)*16+0.5)+1
hitpixel.y = math.floor((hitpos.y+0.5)*16+0.5)+1
if hitpixel.x < 1 or hitpixel.x > 16 or hitpixel.y < 1 or hitpixel.y > 16 then return end
local message = {
x = hitpixel.x,
y = hitpixel.y,
player = player:get_player_name(),
}
digilines.receptor_send(screenpos,digilines.rules.default,core.get_meta(screenpos):get_string("channel"),message)
end
end,
on_timer = function(pos)
local bincolors = core.get_meta(pos):get_string("bincolors")
if string.len(bincolors) > 0 then core.handle_async(digiscreen.recompress,digiscreen.recompressDone,pos,bincolors) end
end,
digiline = {
wire = {
rules = digilines.rules.default,
},
effector = {
action = function(pos,_,channel,msg)
local meta = core.get_meta(pos)
local setchan = meta:get_string("channel")
if type(msg) ~= "table" or setchan ~= channel then return end
core.handle_async(digiscreen.processDigilinesMessage,digiscreen.asyncDone,pos,msg)
end,
},
},
})
core.register_lbm({
name = "digiscreen:respawn",
label = "Respawn/upgrade digiscreen entities",
nodenames = {"digiscreen:digiscreen"},
run_at_every_load = true,
action = digiscreen.updateDisplay,
})
local luacontroller = "mesecons_luacontroller:luacontroller0000"
local rgblightstone = "rgblightstone:rgblightstone_truecolor_0"
core.register_craft({
output = "digiscreen:digiscreen",
recipe = {
{luacontroller,rgblightstone,rgblightstone,},
{rgblightstone,rgblightstone,rgblightstone,},
{rgblightstone,rgblightstone,rgblightstone,},
},
})
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