301 lines
8.4 KiB
Lua
301 lines
8.4 KiB
Lua
-- Textline: wide character displays for Minetest, controlled with Digilines
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-- Based on the LCD that comes with Digilines
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-- Copyright 2017 Gabriel Maia <gabriel@tny.im>, http://github.com/gbl08ma
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-- Copyright 2017 Segvault http://segvault.tny.im
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-- See the included license file LICENSE.txt
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-- Font: 04.jp.org
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textline = {}
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-- load characters map
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local chars_file = io.open(minetest.get_modpath("textline").."/characters", "r")
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local charmap = {}
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local max_chars = 27
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if not chars_file then
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print("[textline] E: character map file not found")
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else
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while true do
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local char = chars_file:read("*l")
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if char == nil then
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break
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end
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local img = chars_file:read("*l")
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chars_file:read("*l")
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charmap[char] = img
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end
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end
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local textlines = {
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-- on ceiling
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--* [0] = {delta = {x = 0, y = 0.4, z = 0}, pitch = math.pi / -2},
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-- on ground
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--* [1] = {delta = {x = 0, y =-0.4, z = 0}, pitch = math.pi / 2},
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-- sides
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[2] = {delta = {x = 0.43, y = 0, z = 0}, yaw = math.pi / -2},
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[3] = {delta = {x = -0.43, y = 0, z = 0}, yaw = math.pi / 2},
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[4] = {delta = {x = 0, y = 0, z = 0.43}, yaw = 0},
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[5] = {delta = {x = 0, y = 0, z = -0.43}, yaw = math.pi},
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}
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local reset_meta = function(pos)
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minetest.get_meta(pos):set_string("formspec", "field[channel;Channel;${channel}]")
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end
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local clearscreen = function(pos)
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local objects = minetest.get_objects_inside_radius(pos, 0.5)
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for _, o in ipairs(objects) do
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if o:get_luaentity() and o:get_luaentity().name == "textline:text" then
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o:remove()
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end
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end
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end
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local prepare_writing = function(pos)
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lcd_info = textlines[minetest.get_node(pos).param2]
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if lcd_info == nil then return end
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local text = minetest.add_entity(
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{x = pos.x + lcd_info.delta.x,
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y = pos.y + lcd_info.delta.y,
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z = pos.z + lcd_info.delta.z}, "textline:text")
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text:set_yaw(lcd_info.yaw or 0)
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return text
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end
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local on_digiline_receive = function(pos, node, channel, msg)
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local meta = minetest.get_meta(pos)
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local setchan = meta:get_string("channel")
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if setchan ~= channel then return end
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meta:set_string("text", msg)
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if msg ~= "" then
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local text = meta:get_string("text")
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local objects = minetest.get_objects_inside_radius(pos, 0.5)
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for _, o in ipairs(objects) do
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local lentity = o:get_luaentity()
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if lentity ~= nil then
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local lname = lentity.name
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if lname ~= nil and lname == "textline:text" then
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o:set_properties({textures={textline:generate_texture(textline:create_lines(text))}})
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end
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end
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end
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end
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end
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local lcd_box = {
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type = "wallmounted",
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wall_top = {-8/16, 7/16, -8/16, 8/16, 8/16, 8/16}
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}
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minetest.register_node("textline:lcd", {
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drawtype = "nodebox",
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description = "Textline",
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inventory_image = "textline_icon.png",
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wield_image = "textline_icon.png",
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tiles = {"textline_anyside.png"},
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paramtype = "light",
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sunlight_propagates = true,
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paramtype2 = "wallmounted",
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node_box = lcd_box,
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selection_box = lcd_box,
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groups = {choppy = 3, dig_immediate = 2, not_blocking_trains = 1},
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after_place_node = function (pos, placer, itemstack)
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local param2 = minetest.get_node(pos).param2
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if param2 == 0 or param2 == 1 then
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minetest.add_node(pos, {name = "textline:lcd", param2 = 3})
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end
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prepare_writing (pos)
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end,
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on_construct = function(pos)
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reset_meta(pos)
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end,
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on_destruct = function(pos)
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clearscreen(pos)
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end,
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on_receive_fields = function(pos, formname, fields, sender)
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if (fields.channel) then
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minetest.get_meta(pos):set_string("channel", fields.channel)
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end
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end,
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_digistuff_channelcopier_fieldname = "channel",
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digiline =
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{
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receptor = {},
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effector = {
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action = on_digiline_receive
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},
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},
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light_source = 0,
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})
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minetest.register_node("textline:hud", {
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drawtype = "airlike",
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description = "Transparent Textline",
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inventory_image = "textline_icon.png",
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wield_image = "textline_icon.png",
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paramtype = "light",
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sunlight_propagates = true,
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paramtype2 = "wallmounted",
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node_box = lcd_box,
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selection_box = lcd_box,
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groups = {choppy = 3, dig_immediate = 2, not_blocking_trains = 1},
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after_place_node = function (pos, placer, itemstack)
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local param2 = minetest.get_node(pos).param2
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if param2 == 0 or param2 == 1 then
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minetest.add_node(pos, {name = "textline:hud", param2 = 3})
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end
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prepare_writing(pos)
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end,
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on_construct = function(pos)
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reset_meta(pos)
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end,
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on_destruct = function(pos)
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clearscreen(pos)
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end,
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on_receive_fields = function(pos, formname, fields, sender)
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if (fields.channel) then
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minetest.get_meta(pos):set_string("channel", fields.channel)
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end
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end,
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_digistuff_channelcopier_fieldname = "channel",
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digiline =
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{
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receptor = {},
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effector = {
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action = on_digiline_receive,
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},
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},
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light_source = 0,
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})
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minetest.register_node("textline:background", {
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drawtype = "nodebox",
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description = "Textline background",
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inventory_image = "textline_background.png",
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wield_image = "textline_background.png",
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tiles = {"textline_anyside.png"},
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paramtype = "light",
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sunlight_propagates = true,
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paramtype2 = "wallmounted",
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node_box = lcd_box,
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selection_box = lcd_box,
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groups = {choppy = 3, dig_immediate = 2, not_blocking_trains = 1},
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light_source = 0,
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})
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minetest.register_entity("textline:text", {
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collisionbox = { 0, 0, 0, 0, 0, 0 },
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visual = "upright_sprite",
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visual_size = {x=3, y=1},
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textures = {},
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on_activate = function(self)
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local meta = minetest.get_meta(self.object:get_pos())
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local text = meta:get_string("text")
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self.object:set_properties({textures={textline:generate_texture(textline:create_lines(text))}})
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end
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})
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-- CONSTANTS
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local LCD_WIDTH = 160
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local LCD_HEIGHT = 34
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local LCD_PADDING = 1
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local LINE_LENGTH = max_chars
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local NUMBER_OF_LINES = 4
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local LINE_HEIGHT = 7
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local LINE_SPACING = 1
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local CHAR_WIDTH = 5
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function textline:create_lines(text)
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local line_num = 1
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local tab = {}
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for line in string.gmatch(text, '([^|\n]+)') do
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table.insert(tab, line)
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line_num = line_num+1
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if line_num > NUMBER_OF_LINES then
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return tab
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end
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end
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return tab
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end
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function textline:generate_texture(lines)
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local texture = "[combine:"..LCD_WIDTH .."x"..LCD_HEIGHT
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local ypos = -2
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for i = 1, #lines do
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texture = texture..self:generate_line(lines[i], ypos)
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ypos = ypos + LINE_HEIGHT + LINE_SPACING
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end
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return texture
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end
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function textline:generate_line(s, ypos)
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local i = 1
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local parsed = {}
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local width = 0
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local chars = 0
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while chars < max_chars and i <= #s do
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local file = nil
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if charmap[s:sub(i, i)] ~= nil then
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file = charmap[s:sub(i, i)]
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i = i + 1
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elseif i < #s and charmap[s:sub(i, i + 1)] ~= nil then
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file = charmap[s:sub(i, i + 1)]
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i = i + 2
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else
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print("[textline] W: unknown symbol in '"..s.."' at "..i)
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i = i + 1
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end
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if file ~= nil then
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width = width + CHAR_WIDTH
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table.insert(parsed, file)
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chars = chars + 1
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end
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end
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width = width - 1
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local texture = ""
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local xpos = LCD_PADDING
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for i = 1, #parsed do
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texture = texture..":"..xpos..","..ypos.."="..parsed[i]..".png"
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xpos = xpos + CHAR_WIDTH + 1
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end
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return texture
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end
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minetest.register_craft({
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output = "textline:lcd 2",
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recipe = {
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{"default:steel_ingot", "digilines:wire_std_00000000", "default:steel_ingot"},
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{"mesecons_lightstone:lightstone_green_off","mesecons_lightstone:lightstone_green_off","default:glass"},
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{"default:glass","default:glass","default:glass"}
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}
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})
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minetest.register_craft({
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output = "textline:background 2",
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recipe = {
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{"default:steel_ingot", "default:glass", "default:steel_ingot"},
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{"mesecons_lightstone:lightstone_green_off","mesecons_lightstone:lightstone_green_off","default:glass"},
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{"default:glass","default:glass","default:glass"}
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}
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})
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