mtcontrib/led_marquee
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basic multi-line support

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Stack up a wall of LED panels, any horizontal and vertical amount

Set a channel on the upper left panel, leave the others un-set, and
connect a LuaC to it via digilines.

Long strings sent to that channel will be displayed using all panels,
starting at the upper-left and working from left to right, top to
bottom, wrapping from line to line as appropriate (similar to printing
to a shell terminal).

string.char(28) can be inserted anywhere to force a linefeed.

As usual, printing continues from node to node until the program either
finds a panel with a different non-empty channel than the first one, or
it finds a panel that's facing the wrong way.

If the program finds something other than a panel, it wraps to the next
line.  If it finds something other than a panel twice in a row, that
signals that text has wrapped off of the last row, and printing is cut
off.

Lines of panels don't need to be the same length, the program will wrap
as needed.

This commit also gets rid of the end-of-line padding, uses proper
string.rep() to create the all-off and all-on fills (each of which is
1kB), and fixes one or two other minor issues.

Strings are trimmed to 1 kB.

Panels are not erased between prints.
This commit is contained in:
Vanessa Dannenberg 2018-08-16 01:28:36 -04:00
parent 161623e869
commit 4bb68ec009
1 changed files with 34 additions and 17 deletions
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51
init.lua
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@ -42,43 +42,60 @@ local cbox = {
wall_side = { -8/16, -8/16, -8/16, -7/16, 8/16, 8/16 }
}
local padding = " "
local allon = string.char(128)
for i = 1, 64 do
padding = padding.." "
allon = allon..string.char(144)
end
local display_string = function(pos, channel, string)
if string == "off_multi" then
string = ""
string = string.rep(" ", 1024)
elseif string == "allon_multi" then
string = allon
string = string.rep(string.char(144), 1024)
end
local padded_string = string.sub(string..padding, 1, 64)
string = string.sub(string, 1, 1024)
local master_fdir = minetest.get_node(pos).param2 % 8
local master_meta = minetest.get_meta(pos)
local last_color = master_meta:get_int("last_color")
local pos2 = pos
local pos2 = table.copy(pos)
if not last_color or last_color < 0 or last_color > 27 then
last_color = 0
master_meta:set_int("last_color", 0)
end
for i = 1, 64 do
local i = 1
local len = string.len(string)
local wrapped = nil
while i <= len do
local node = minetest.get_node(pos2)
local fdir = node.param2 % 8
local meta = minetest.get_meta(pos2)
local setchan = meta:get_string("channel")
if not string.match(node.name, "led_marquee:char_") or (setchan ~= nil and setchan ~= "" and setchan ~= channel) then break end
local asc = string.byte(padded_string, i, i)
if master_fdir == fdir and asc > 30 and asc < 256 then
local setchan = nil
if meta then setchan = meta:get_string("channel") end
local asc = string.byte(string, i, i)
if not string.match(node.name, "led_marquee:char_") then
if not wrapped then
pos2.x = pos.x
pos2.y = pos2.y-1
pos2.z = pos.z
wrapped = true
else
break
end
elseif string.match(node.name, "led_marquee:char_")
and fdir ~= master_fdir or (setchan ~= nil and setchan ~= "" and setchan ~= channel) then
break
elseif asc == 28 then
pos2.x = pos.x
pos2.y = pos2.y-1
pos2.z = pos.z
i = i + 1
wrapped = nil
elseif asc > 30 and asc < 256 then
minetest.swap_node(pos2, { name = "led_marquee:char_"..asc, param2 = master_fdir + (last_color*8)})
pos2.x = pos2.x + fdir_to_right[fdir+1][1]
pos2.z = pos2.z + fdir_to_right[fdir+1][2]
i = i + 1
wrapped = nil
elseif asc < 28 then
last_color = asc
master_meta:set_int("last_color", asc)
i = i + 1
wrapped = nil
end
end
end