138 lines
3.2 KiB
Lua
138 lines
3.2 KiB
Lua
local modpath = minetest.get_modpath(minetest.get_current_modname())
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local function set_color(meta, color)
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meta:set_int("palette_index", color)
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meta:set_string("description", "Dye (color #" .. color .. ")")
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end
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local function change_variation(itemstack)
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local meta = itemstack:get_meta()
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local color = meta:get_int("palette_index")
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local variation
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local new_color
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if color >= 240 then
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if color == 255 then
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new_color = 240
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else
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new_color = color + 1
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end
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else
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variation = color % 10
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local hue = color - variation
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new_color = (variation+1) % 10 + hue
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end
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set_color(meta, new_color)
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return itemstack
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end
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local function change_hue(itemstack)
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local meta = itemstack:get_meta()
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local color = meta:get_int("palette_index")
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local new_color = color + 10
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if color >= 230 then
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if color == 255 then
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new_color = 0
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else
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new_color = math.max(color + 1, 240)
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end
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end
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set_color(meta, new_color)
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return itemstack
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end
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minetest.register_craftitem("256_dyes:dye", {
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description = "Dye",
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groups = {},
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inventory_image = "256_dyes_dye.png",
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wield_image = "256_dyes_dye.png",
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palette = "256_dyes_palette.png",
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stack_max = 99,
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color = "#400000",
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on_use = change_variation,
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on_place = change_hue,
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on_secondary_use = change_hue,
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})
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local file = io.open(modpath .. "/colors.dat", "r")
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local raw_colors = minetest.decompress(file:read("*all"))
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file:close()
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local colors = {}
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for i=0, 255 do
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local pos = i * 3
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raw_color = raw_colors:sub(pos+1, pos+3)
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color = {raw_color:byte(1, 3)}
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colors[i] = color
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end
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local function mix(...)
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local list = {...}
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local n = #list
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local sum_c = 0
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local sum_m = 0
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local sum_y = 0
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for _, i in ipairs(list) do
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r, g, b = unpack(colors[i])
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local c, m, y = 255-r, 255-g, 255-b
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sum_c = sum_c + c^2
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sum_m = sum_m + m^2
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sum_y = sum_y + y^2
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end
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local true_color = {math.sqrt(sum_c/n), math.sqrt(sum_m/n), math.sqrt(sum_y/n)} -- I found that calculating the quadratic mean of CMY colors gives more realistic mixes because it makes the mix more sensitive to dark colors
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local min_diff = 765
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local nearest = 0
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for i=0, 255 do
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local color = colors[i]
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local c, m, y = 255-color[1], 255-color[2], 255-color[3]
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local diff = math.abs(c - true_color[1]) + math.abs(m - true_color[2]) + math.abs(y - true_color[3])
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if diff < min_diff then
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min_diff = diff
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nearest = i
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end
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end
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return nearest
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end
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for i=1, 9 do
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recipe = {}
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for j=1, i do
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table.insert(recipe, "256_dyes:dye")
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end
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minetest.register_craft({
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type = "shapeless",
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output = "256_dyes:dye",
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recipe = recipe,
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})
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end
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local function dye_craft(itemstack, player, old_craft_grid, craft_inv)
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if itemstack:get_name() ~= "256_dyes:dye" then
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return
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end
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local list_colors = {}
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for _, stack in ipairs(old_craft_grid) do
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if not stack:is_empty() then
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if stack:get_name() == "256_dyes:dye" then
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local meta = stack:get_meta()
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table.insert(list_colors, meta:get_int("palette_index"))
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else
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return
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end
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end
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end
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if #list_colors == 0 then
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return
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end
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itemstack = ItemStack("256_dyes:dye " .. #list_colors)
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local new_color = mix(unpack(list_colors))
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local meta = itemstack:get_meta()
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set_color(meta, new_color)
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return itemstack
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end
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minetest.register_craft_predict(dye_craft)
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minetest.register_on_craft(dye_craft)
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