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track colors properly in scrolling text

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(also fixes timing glitches)
This commit is contained in:
Vanessa Dannenberg 2018-08-17 15:18:57 -04:00
parent 010dab660b
commit 06b419a905
1 changed files with 22 additions and 6 deletions
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26
init.lua
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@ -67,16 +67,32 @@ led_marquee.set_timer = function(pos, timeout)
end
led_marquee.scroll_text = function(pos, elapsed)
local meta = minetest.get_meta(pos)
local index = meta:get_int("index")
local msg = meta:get_string("last_msg")
local channel = meta:get_string("channel")
if not index or index < 1 or index > string.len(msg) then index = 1 end
if string.byte(string.sub(msg,1,1)) < 32 then index = index + 1 end
local index = meta:get_int("index") + 1
if not index or index < 1 or not string.byte(msg, index) then index = 1 end
local len = string.len(msg)
while string.byte(msg, index) < 28 and index < len do
index = index + 1
if index > len then index = 1 break end
end
if string.byte(msg, index - 1) < 28 then
led_marquee.display_msg(pos, channel, string.sub(msg, index - 1).." ")
else
local i = index - 1
local color = ""
while string.byte(msg, i) > 27 and i > 0 do
i = i - 1
if i == 0 then break end
end
if i > 0 then color = string.sub(msg, i, i) end
led_marquee.display_msg(pos, channel, color..string.sub(msg, index).." ")
end
meta:set_int("index", index)
msg = string.sub(msg, index)
led_marquee.display_msg(pos, channel, msg.." ")
if not elapsed or elapsed < 0.5 then return false end
return true
end