Merge branch 'master' of https://github.com/minetest/minetest

[dragonfireclient.git] / builtin / common / misc_helpers.lua

diff --git a/builtin/common/misc_helpers.lua b/builtin/common/misc_helpers.lua
index d2356b50572cedd04e6923ec3b796ea67acba9cf..f8a905c7bbf6d819e9009022fa9bcb4d2c687245 100644 (file)
--- a/builtin/common/misc_helpers.lua
+++ b/builtin/common/misc_helpers.lua
@@ -516,6 +516,17 @@ function table.shuffle(t, from, to, random)
 end
 
 
+function table.combine(t, other)
+       other = other or {}
+       for k, v in pairs(other) do
+               if type(v) == "table" and type(t[k]) == "table" then
+                       table.combine(t[k], v)
+               else
+                       t[k] = v
+               end
+       end
+end
+
 --------------------------------------------------------------------------------
 -- mainmenu only functions
 --------------------------------------------------------------------------------
@@ -583,6 +594,66 @@ function core.colorize(color, message)
        return table.concat(lines, "\n") .. core.get_color_escape_sequence("#ffffff")
 end
 
+local function rgb_to_hex(rgb)
+       local hexadecimal = "#"
+
+       for key, value in pairs(rgb) do
+               local hex = ""
+
+               while(value > 0)do
+                       local index = math.fmod(value, 16) + 1
+                       value = math.floor(value / 16)
+                       hex = string.sub("0123456789ABCDEF", index, index) .. hex
+               end
+
+               if(string.len(hex) == 0)then
+                       hex = "00"
+               elseif(string.len(hex) == 1)then
+                       hex = "0" .. hex
+               end
+
+               hexadecimal = hexadecimal .. hex
+       end
+
+       return hexadecimal
+end
+
+local function color_from_hue(hue)
+       local h = hue / 60
+       local c = 255
+       local x = (1 - math.abs(h % 2 - 1)) * 255
+
+       local i = math.floor(h)
+       if i == 0 then
+               return rgb_to_hex({c, x, 0})
+       elseif i == 1 then
+               return rgb_to_hex({x, c, 0})
+       elseif i == 2 then
+               return rgb_to_hex({0, c, x})
+       elseif i == 3 then
+               return rgb_to_hex({0, x, c})
+       elseif i == 4 then
+               return rgb_to_hex({x, 0, c})
+       else
+               return rgb_to_hex({c, 0, x})
+       end
+end
+
+function core.rainbow(input)
+       local step = 360 / input:len()
+       local hue = 0
+       local output = ""
+       for i = 1, input:len() do
+               local char = input:sub(i, i)
+               if char:match("%s") then
+                       output = output .. char
+               else
+                       output = output  .. core.get_color_escape_sequence(color_from_hue(hue)) .. char
+               end
+               hue = hue + step
+       end
+       return output
+end
 
 function core.strip_foreground_colors(str)
        return (str:gsub(ESCAPE_CHAR .. "%(c@[^)]+%)", ""))
@@ -636,6 +707,19 @@ function core.get_translator(textdomain)
        return function(str, ...) return core.translate(textdomain or "", str, ...) end
 end
 
+function core.get_pointed_thing_position(pointed_thing, above)
+       if pointed_thing.type == "node" then
+               if above then
+                       -- The position where a node would be placed
+                       return pointed_thing.above
+               end
+               -- The position where a node would be dug
+               return pointed_thing.under
+       elseif pointed_thing.type == "object" then
+               return pointed_thing.ref and pointed_thing.ref:get_pos()
+       end
+end
+
 --------------------------------------------------------------------------------
 -- Returns the exact coordinate of a pointed surface
 --------------------------------------------------------------------------------
@@ -768,3 +852,12 @@ function core.parse_coordinates(x, y, z, relative_to)
        local rz = core.parse_relative_number(z, relative_to.z)
        return rx and ry and rz and { x = rx, y = ry, z = rz }
 end
+
+function core.inventorycube(img1, img2, img3)
+       img2 = img2 or img1
+       img3 = img3 or img1
+       return "[inventorycube"
+                       .. "{" .. img1:gsub("%^", "&")
+                       .. "{" .. img2:gsub("%^", "&")
+                       .. "{" .. img3:gsub("%^", "&")
+end