Initial public release

104 files changed, 767 insertions, 0 deletions

diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..a231a2e
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,188 @@
+The LGPLv3 applies to all code in this project.
+The WTFPL applies to textures and any other content in this project which is not source code.
+
+=============================================================
+
+GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
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+other than an Application or a Combined Work as defined below.
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+   a) Give prominent notice with each copy of the object code that the
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+
+=============================================================
+
+
+ DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
+                    Version 2, December 2004 
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net> 
+
+ Everyone is permitted to copy and distribute verbatim or modified 
+ copies of this license document, and changing it is allowed as long 
+ as the name is changed. 
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 
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+  0. You just DO WHAT THE FUCK YOU WANT TO. 
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+Textline
+==========
+
+This is a [Minetest](http://www.minetest.net/) mod that adds a text screen that is three blocks wide and is controlled with [Digilines](https://github.com/minetest-mods/digilines/). It works very similarly to the LCD screen that comes with Digilines, but is meant to be readable from farther away.
+
+![Screenshot](https://raw.githubusercontent.com/gbl08ma/textline/screenshot.png?raw=true)
+
+## Features
+
+* Dimensions: 3x1
+* Always stands vertically (can't be floor- or ceiling-mounted)
+* Four lines of orange text with 27 characters each, on a black background
+* Explicit line breaks with the newline character (\n) or the pipe (|) character. No text wrapping, for maximum control of the output.
+* Memory: the display "remembers" what it was displaying across server shutdowns. No need to constantly refresh its contents.
+* Optimized for frequent refreshes: its contents can change every second without excessive object generation.
+
+## Installing
+
+Just install it like any other Minetest mod.
+
+1. [Download](https://github.com/gbl08ma/textline/archive/master.zip)
+
+1. Extract the ZIP into the Minetest mods folder (usually `mods`);
+
+1. Rename the `textline-master` folder to `textline`;
+
+1. This mod depends on Digilines, make sure you have it installed;
+
+1. In Minetest, enable the mod in the world settings.
+
+## Usage
+
+A display consists of three separate nodes that must be placed individually. The center node is responsible for displaying the text it receives through Digilines; the two blocks to the sides make the rest of the background for the display.
+
+The background node appears in the inventory as an orange square with "BKG" written on it. The center node appears as "TXT".
+
+Digilines should be connected to the "TXT" block. You can configure its channel by clicking with the place/use button on them (default: right-click). Then you can just use it as a standard Digilines receiver. For example, for a screen running on channel `test`, you could execute the following code on a connected LuaController:
+
+`digiline_send("test", "This is a test\nThis is the second line\nThird line\nFourth line")`
+
+## License
+
+See LICENSE.txt
+
diff --git a/characters b/characters
new file mode 100644
index 0000000..b6884e8
--- /dev/null
+++ b/characters
@@ -0,0 +1,282 @@
+A
+t_a_
+7
+B
+t_b_
+5
+C
+t_c_
+6
+D
+t_d_
+6
+E
+t_e_
+5
+F
+t_f_
+5
+G
+t_g_
+6
+H
+t_h_
+6
+I
+t_i_
+1
+J
+t_j_
+4
+K
+t_k_
+5
+L
+t_l_
+4
+M
+t_m_
+7
+N
+t_n_
+6
+O
+t_o_
+6
+P
+t_p_
+5
+Q
+t_q_
+7
+R
+t_r_
+5
+S
+t_s_
+5
+T
+t_t_
+5
+U
+t_u_
+6
+V
+t_v_
+7
+W
+t_w_
+9
+X
+t_x_
+5
+Y
+t_y_
+7
+Z
+t_z_
+5
+a
+t_a
+5
+b
+t_b
+5
+c
+t_c
+4
+d
+t_d
+5
+e
+t_e
+4
+f
+t_f
+4
+g
+t_g
+5
+h
+t_h
+5
+i
+t_i
+1
+j
+t_j
+1
+k
+t_k
+4
+l
+t_l
+1
+m
+t_m
+7
+n
+t_n
+5
+o
+t_o
+5
+p
+t_p
+5
+q
+t_q
+5
+r
+t_r
+3
+s
+t_s
+4
+t
+t_t
+3
+u
+t_u
+4
+v
+t_v
+5
+w
+t_w
+7
+x
+t_x
+5
+y
+t_y
+4
+z
+t_z
+4
+ 
+t_sp
+2
+0
+t_0
+4
+1
+t_1
+2
+2
+t_2
+4
+3
+t_3
+4
+4
+t_4
+4
+5
+t_5
+4
+6
+t_6
+4
+7
+t_7
+4
+8
+t_8
+4
+9
+t_9
+4
+(
+t_bl
+2
+)
+t_br
+2
+{
+t_cl
+3
+}
+t_cr
+3
+[
+t_sl
+2
+]
+t_sr
+2
+'
+t_ap
+1
+!
+t_ex
+1
+?
+t_qu
+4
+@
+t_at
+5
+#
+t_hs
+5
+$
+t_dl
+4
+%
+t_pr
+5
+^
+t_ca
+3
+&
+t_am
+5
+*
+t_as
+3
+_
+t_un
+3
++
+t_ps
+3
+-
+t_mn
+3
+=
+t_eq
+3
+;
+t_sm
+1
+:
+t_co
+1
+,
+t_cm
+2
+"
+t_qo
+3
+/
+t_dv
+5
+~
+t_tl
+4
+<
+t_lt
+3
+>
+t_gt
+3
+\
+t_re
+5
+|
+t_vb
+1
+.
+t_dt
+1
diff --git a/depends.txt b/depends.txt
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+++ b/depends.txt
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+default
+digilines
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..a3609c5
--- /dev/null
+++ b/init.lua
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+-- Textline: wide character displays for Minetest, controlled with Digilines
+-- Based on the LCD that comes with Digilines
+-- Copyright 2017 Gabriel Maia <gabriel@tny.im>, http://github.com/gbl08ma
+-- Copyright 2017 Segvault http://segvault.tny.im
+-- See the included license file LICENSE.txt
+-- Font: 04.jp.org
+
+textline = {}
+-- load characters map
+local chars_file = io.open(minetest.get_modpath("textline").."/characters", "r")
+local charmap = {}
+local max_chars = 27
+if not chars_file then
+    print("[textline] E: character map file not found")
+else
+    while true do
+        local char = chars_file:read("*l")
+        if char == nil then
+            break
+        end
+        local img = chars_file:read("*l")
+        chars_file:read("*l")
+        charmap[char] = img
+    end
+end
+
+local textlines = {
+    -- on ceiling
+    --* [0] = {delta = {x = 0, y = 0.4, z = 0}, pitch = math.pi / -2},
+    -- on ground
+    --* [1] = {delta = {x = 0, y =-0.4, z = 0}, pitch = math.pi /  2},
+    -- sides
+    [2] = {delta = {x =  0.43, y = 0, z = 0}, yaw = math.pi / -2},
+    [3] = {delta = {x = -0.43, y = 0, z = 0}, yaw = math.pi /  2},
+    [4] = {delta = {x = 0, y = 0, z =  0.43}, yaw = 0},
+    [5] = {delta = {x = 0, y = 0, z = -0.43}, yaw = math.pi},
+}
+
+local reset_meta = function(pos)
+    minetest.get_meta(pos):set_string("formspec", "field[channel;Channel;${channel}]")
+end
+
+local clearscreen = function(pos)
+    local objects = minetest.get_objects_inside_radius(pos, 0.5)
+    for _, o in ipairs(objects) do
+        if o:get_luaentity().name == "textline:text" then
+            o:remove()
+        end
+    end
+end
+
+local prepare_writing = function(pos)
+    lcd_info = textlines[minetest.get_node(pos).param2]
+    if lcd_info == nil then return end
+    local text = minetest.add_entity(
+        {x = pos.x + lcd_info.delta.x,
+         y = pos.y + lcd_info.delta.y,
+         z = pos.z + lcd_info.delta.z}, "textline:text")
+    text:setyaw(lcd_info.yaw or 0)
+    return text
+end
+
+local on_digiline_receive = function(pos, node, channel, msg)
+    local meta = minetest.get_meta(pos)
+    local setchan = meta:get_string("channel")
+    if setchan ~= channel then return end
+
+    meta:set_string("text", msg)
+    if msg ~= "" then
+        local text = meta:get_string("text")
+        local objects = minetest.get_objects_inside_radius(pos, 0.5)
+        for _, o in ipairs(objects) do
+            local lentity = o:get_luaentity()
+            if lentity ~= nil then
+                local lname = lentity.name
+                if lname ~= nil and lname == "textline:text" then
+                    o:set_properties({textures={textline:generate_texture(textline:create_lines(text))}})
+                end
+            end
+        end
+    end
+end
+
+local lcd_box = {
+    type = "wallmounted",
+    wall_top = {-8/16, 7/16, -8/16, 8/16, 8/16, 8/16}
+}
+
+minetest.register_node("textline:lcd", {
+    drawtype = "nodebox",
+    description = "Textline",
+    inventory_image = "textline_icon.png",
+    wield_image = "textline_icon.png",
+    tiles = {"textline_anyside.png"},
+
+    paramtype = "light",
+    sunlight_propagates = true,
+    paramtype2 = "wallmounted",
+    node_box = lcd_box,
+    selection_box = lcd_box,
+    groups = {choppy = 3, dig_immediate = 2},
+
+    after_place_node = function (pos, placer, itemstack)
+        local param2 = minetest.get_node(pos).param2
+        if param2 == 0 or param2 == 1 then
+            minetest.add_node(pos, {name = "textline:lcd", param2 = 3})
+        end
+        prepare_writing (pos)
+    end,
+
+    on_construct = function(pos)
+        reset_meta(pos)
+    end,
+
+    on_destruct = function(pos)
+        clearscreen(pos)
+    end,
+
+    on_receive_fields = function(pos, formname, fields, sender)
+        if (fields.channel) then
+            minetest.get_meta(pos):set_string("channel", fields.channel)
+        end
+    end,
+
+    digiline = 
+    {
+        receptor = {},
+        effector = {
+            action = on_digiline_receive
+        },
+    },
+
+    light_source = 0,
+})
+
+minetest.register_node("textline:background", {
+    drawtype = "nodebox",
+    description = "Textline background",
+    inventory_image = "textline_background.png",
+    wield_image = "textline_background.png",
+    tiles = {"textline_anyside.png"},
+
+    paramtype = "light",
+    sunlight_propagates = true,
+    paramtype2 = "wallmounted",
+    node_box = lcd_box,
+    selection_box = lcd_box,
+    groups = {choppy = 3, dig_immediate = 2},
+
+    light_source = 0,
+})
+
+minetest.register_entity("textline:text", {
+    collisionbox = { 0, 0, 0, 0, 0, 0 },
+    visual = "upright_sprite",
+    visual_size = {x=3, y=1},
+    textures = {},
+
+    on_activate = function(self)
+        local meta = minetest.get_meta(self.object:getpos())
+        local text = meta:get_string("text")
+        self.object:set_properties({textures={textline:generate_texture(textline:create_lines(text))}})
+    end
+})
+
+-- CONSTANTS
+local LCD_WIDTH = 160
+local LCD_HEIGHT = 34
+local LCD_PADDING = 1
+
+local LINE_LENGTH = max_chars
+local NUMBER_OF_LINES = 4
+
+local LINE_HEIGHT = 7
+local LINE_SPACING = 1
+local CHAR_WIDTH = 5
+
+function textline:create_lines(text)
+    local line_num = 1
+    local tab = {}
+    for line in string.gmatch(text, '([^|\n]+)') do
+        table.insert(tab, line)
+        line_num = line_num+1
+        if line_num > NUMBER_OF_LINES then
+            return tab
+        end
+    end
+    return tab
+end
+
+function textline:generate_texture(lines)
+    local texture = "[combine:"..LCD_WIDTH .."x"..LCD_HEIGHT
+    local ypos = -2
+    for i = 1, #lines do
+        texture = texture..self:generate_line(lines[i], ypos)
+        ypos = ypos + LINE_HEIGHT + LINE_SPACING
+    end
+    return texture
+end
+
+function textline:generate_line(s, ypos)
+    local i = 1
+    local parsed = {}
+    local width = 0
+    local chars = 0
+    while chars < max_chars and i <= #s do
+        local file = nil
+        if charmap[s:sub(i, i)] ~= nil then
+            file = charmap[s:sub(i, i)]
+            i = i + 1
+        elseif i < #s and charmap[s:sub(i, i + 1)] ~= nil then
+            file = charmap[s:sub(i, i + 1)]
+            i = i + 2
+        else
+            print("[textline] W: unknown symbol in '"..s.."' at "..i)
+            i = i + 1
+        end
+        if file ~= nil then
+            width = width + CHAR_WIDTH
+            table.insert(parsed, file)
+            chars = chars + 1
+        end
+    end
+    width = width - 1
+
+    local texture = ""
+    local xpos = LCD_PADDING
+    for i = 1, #parsed do
+        texture = texture..":"..xpos..","..ypos.."="..parsed[i]..".png"
+        xpos = xpos + CHAR_WIDTH + 1
+    end
+    return texture
+end
+
+minetest.register_craft({
+    output = "textline:lcd 2",
+    recipe = {
+        {"default:steel_ingot", "digilines:wire_std_00000000", "default:steel_ingot"},
+        {"mesecons_lightstone:lightstone_green_off","mesecons_lightstone:lightstone_green_off","default:glass"},
+        {"default:glass","default:glass","default:glass"}
+    }
+})
+
+minetest.register_craft({
+    output = "textline:background 2",
+    recipe = {
+        {"default:steel_ingot", "default:glass", "default:steel_ingot"},
+        {"mesecons_lightstone:lightstone_green_off","mesecons_lightstone:lightstone_green_off","default:glass"},
+        {"default:glass","default:glass","default:glass"}
+    }
+})
diff --git a/screenshot.png b/screenshot.png
new file mode 100644
index 0000000..a69e83c
--- /dev/null
+++ b/screenshot.png
diff --git a/textures/t_0.png b/textures/t_0.png
new file mode 100644
index 0000000..94eca9b
--- /dev/null
+++ b/textures/t_0.png
diff --git a/textures/t_1.png b/textures/t_1.png
new file mode 100644
index 0000000..12ff6c3
--- /dev/null
+++ b/textures/t_1.png
diff --git a/textures/t_2.png b/textures/t_2.png
new file mode 100644
index 0000000..6d194d0
--- /dev/null
+++ b/textures/t_2.png
diff --git a/textures/t_3.png b/textures/t_3.png
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--- /dev/null
+++ b/textures/t_3.png
diff --git a/textures/t_4.png b/textures/t_4.png
new file mode 100644
index 0000000..c4aa8b8
--- /dev/null
+++ b/textures/t_4.png
diff --git a/textures/t_5.png b/textures/t_5.png
new file mode 100644
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--- /dev/null
+++ b/textures/t_5.png
diff --git a/textures/t_6.png b/textures/t_6.png
new file mode 100644
index 0000000..9a8a6d4
--- /dev/null
+++ b/textures/t_6.png
diff --git a/textures/t_7.png b/textures/t_7.png
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--- /dev/null
+++ b/textures/t_7.png
diff --git a/textures/t_8.png b/textures/t_8.png
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