314 lines
6.8 KiB
Lua
314 lines
6.8 KiB
Lua
--[[
|
||
|
||
maps – Minetest mod to render very ugly HUD maps
|
||
Copyright © 2022 Nils Dagsson Moskopp (erlehmann)
|
||
|
||
This program is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU Affero General Public License as
|
||
published by the Free Software Foundation, either version 3 of the
|
||
License, or (at your option) any later version.
|
||
|
||
Dieses Programm hat das Ziel, die Medienkompetenz der Leser zu
|
||
steigern. Gelegentlich packe ich sogar einen handfesten Buffer
|
||
Overflow oder eine Format String Vulnerability zwischen die anderen
|
||
Codezeilen und schreibe das auch nicht dran.
|
||
|
||
]]--
|
||
|
||
maps = {}
|
||
maps.dots = {}
|
||
maps.maps = {}
|
||
maps.minp = {}
|
||
maps.maxp = {}
|
||
maps.work = {}
|
||
maps.sent = {}
|
||
maps.posx = {}
|
||
maps.posz = {}
|
||
|
||
local size = 80
|
||
|
||
local worldpath = minetest.get_worldpath()
|
||
local textures_dir = worldpath .. "/maps/"
|
||
minetest.mkdir(textures_dir)
|
||
|
||
maps.create_map = function(pos, player_name)
|
||
local minp = vector.multiply(vector.floor(vector.divide(pos, size)), size)
|
||
local maxp = vector.add(minp, vector.new(size - 1, size - 1, size - 1))
|
||
|
||
local prefix, _ = minetest.pos_to_string(maxp)
|
||
prefix, _ = prefix:gsub("%(", "")
|
||
prefix, _ = prefix:gsub("%)", "")
|
||
prefix, _ = prefix:gsub(",", "_")
|
||
local filename = prefix .. ".tga"
|
||
|
||
if maps.work[filename] then
|
||
return
|
||
end
|
||
|
||
local player = minetest.get_player_by_name(player_name)
|
||
|
||
if maps.sent[filename] then
|
||
maps.minp[player_name] = minp
|
||
maps.maxp[player_name] = maxp
|
||
player:hud_change(
|
||
maps.maps[player_name],
|
||
"text",
|
||
filename
|
||
)
|
||
return
|
||
end
|
||
|
||
maps.work[filename] = true
|
||
|
||
player:hud_change(
|
||
maps.maps[player_name],
|
||
"text",
|
||
"blank.png"
|
||
)
|
||
|
||
local emerge_callback = function(
|
||
blockpos,
|
||
action,
|
||
calls_remaining
|
||
)
|
||
if calls_remaining > 0 then
|
||
return
|
||
end
|
||
|
||
local pixels = {}
|
||
local colormap = {
|
||
{ 195, 175, 140 }, -- background
|
||
{ 60, 35, 16 }, -- dark line
|
||
{ 210, 170, 130 }, -- liquid light
|
||
{ 135, 90, 40 }, -- liquid dark
|
||
{ 150, 105, 55 }, -- more liquid
|
||
{ 165, 120, 70 }, -- more liquid
|
||
{ 150, 105, 55 }, -- more liquid
|
||
{ 60, 35, 16 }, -- tree outline
|
||
{ 150, 105, 55 }, -- tree fill
|
||
}
|
||
for x = 1,size,1 do
|
||
for z = 1,size,1 do
|
||
local color = { 0 }
|
||
pixels[z] = pixels[z] or {}
|
||
pixels[z][x] = color
|
||
end
|
||
end
|
||
|
||
local positions = minetest.find_nodes_in_area_under_air(
|
||
minp,
|
||
maxp,
|
||
"group:liquid"
|
||
)
|
||
for _, p in ipairs(positions) do
|
||
local z = p.z - minp.z + 1
|
||
local x = p.x - minp.x + 1
|
||
pixels[z][x] = { 2 }
|
||
end
|
||
|
||
-- draw coastline
|
||
for x = 1,size,1 do
|
||
for z = 1,size,1 do
|
||
if pixels[z][x][1] >= 2 then
|
||
pixels[z][x] = { 2 + ( z % 2 ) } -- stripes
|
||
if pixels[z][x][1] == 3 then
|
||
pixels[z][x] = { 3 + ( ( math.floor( x / 7 ) + math.floor( 1.3 * z * z ) ) % 4 ) }
|
||
end
|
||
if z > 1 and pixels[z-1][x][1] < 2 then
|
||
pixels[z-1][x] = { 1 }
|
||
pixels[z][x] = { 3 }
|
||
end
|
||
if z < size and pixels[z+1][x][1] < 2 then
|
||
pixels[z+1][x] = { 1 }
|
||
pixels[z][x] = { 3 }
|
||
end
|
||
if x > 1 and pixels[z][x-1][1] < 2 then
|
||
pixels[z][x-1] = { 1 }
|
||
pixels[z][x] = { 3 }
|
||
end
|
||
if x < size and pixels[z][x+1][1] < 2 then
|
||
pixels[z][x+1] = { 1 }
|
||
pixels[z][x] = { 3 }
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
local positions = minetest.find_nodes_in_area_under_air(
|
||
minp,
|
||
maxp,
|
||
{
|
||
"group:leaves",
|
||
"default:snow", -- snow-covered leaves
|
||
}
|
||
)
|
||
for _, p in ipairs(positions) do
|
||
local z = p.z - minp.z + 1
|
||
local x = p.x - minp.x + 1
|
||
local node = minetest.get_node({
|
||
x=p.x,
|
||
y=p.y - 4,
|
||
z=p.z,
|
||
})
|
||
local draw_tree = (
|
||
minetest.get_item_group(
|
||
node.name,
|
||
"tree"
|
||
) > 0 ) and (
|
||
z < size - 6 and
|
||
x > 3 and
|
||
x < size - 3
|
||
)
|
||
if draw_tree then
|
||
local tree = {}
|
||
if nil ~= node.name:find("pine") then
|
||
tree = {
|
||
" # ",
|
||
"#####",
|
||
"#...#",
|
||
" #.# ",
|
||
" #.# ",
|
||
" # ",
|
||
}
|
||
else
|
||
tree = {
|
||
" # ",
|
||
" # ",
|
||
" ### ",
|
||
"#...#",
|
||
"#...#",
|
||
"#...#",
|
||
" ### ",
|
||
}
|
||
end
|
||
local overlap = false
|
||
for t_z = 1,#tree do
|
||
for t_x = 1,#tree[t_z] do
|
||
local color = pixels[z + t_z][x + t_x - 3][1]
|
||
-- do not draw trees close to trees or water
|
||
if color > 2 then
|
||
overlap = true
|
||
break
|
||
end
|
||
end
|
||
if overlap then
|
||
break
|
||
end
|
||
end
|
||
if overlap then
|
||
tree = {}
|
||
end
|
||
for t_z = 1,#tree do
|
||
for t_x = 1,#tree[t_z] do
|
||
local byte = tree[t_z]:byte(t_x)
|
||
if 35 == byte then -- #
|
||
pixels[z + t_z][x + t_x - 3] = { 7 }
|
||
elseif 46 == byte then -- .
|
||
pixels[z + t_z][x + t_x - 3] = { 8 }
|
||
end
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
local filepath = textures_dir .. filename
|
||
tga_encoder.image(pixels):save(
|
||
filepath,
|
||
{ colormap=colormap }
|
||
)
|
||
|
||
minetest.dynamic_add_media(
|
||
filepath,
|
||
function()
|
||
local player =minetest.get_player_by_name(player_name)
|
||
player:hud_change(
|
||
maps.maps[player_name],
|
||
"text",
|
||
filename
|
||
)
|
||
maps.minp[player_name] = minp
|
||
maps.maxp[player_name] = maxp
|
||
maps.sent[filename] = true
|
||
maps.work[filename] = false
|
||
end
|
||
)
|
||
end
|
||
|
||
minetest.emerge_area(
|
||
minp,
|
||
maxp,
|
||
emerge_callback
|
||
)
|
||
end
|
||
|
||
minetest.register_on_joinplayer(
|
||
function(player)
|
||
local player_name = player:get_player_name()
|
||
local map_def = {
|
||
hud_elem_type = "image",
|
||
text = "blank.png",
|
||
position = { x = 0.15, y = 0.90 },
|
||
alignment = { x = 0, y = -1 },
|
||
offset = { x = 0, y = 0 },
|
||
scale = { x = 4, y = 4 }
|
||
}
|
||
local dot_def = table.copy(map_def)
|
||
dot_def.text = "maps_x.tga" -- "player.png^[resize:4x8"
|
||
maps.maps[player_name] = player:hud_add(map_def)
|
||
maps.dots[player_name] = player:hud_add(dot_def)
|
||
maps.minp[player_name] = { x=-32000, y=0, z=0 }
|
||
maps.maxp[player_name] = { x=-32000, y=0, z=0 }
|
||
end
|
||
)
|
||
|
||
local time_elapsed = 0
|
||
|
||
minetest.register_globalstep(
|
||
function(dtime)
|
||
time_elapsed = time_elapsed + dtime
|
||
if time_elapsed < ( 1 / 30 ) then
|
||
return -- fps limiter
|
||
end
|
||
local players = minetest.get_connected_players()
|
||
for _, player in pairs(players) do
|
||
local pos = vector.round(player:get_pos())
|
||
local player_name = player:get_player_name()
|
||
|
||
if (
|
||
pos.x == maps.posx[player_name] and
|
||
pos.z == maps.posz[player_name]
|
||
) then
|
||
-- continue
|
||
else
|
||
local minp = maps.minp[player_name]
|
||
local maxp = maps.maxp[player_name]
|
||
|
||
if pos.x < minp.x then
|
||
maps.create_map(pos, player_name)
|
||
elseif pos.x > maxp.x then
|
||
maps.create_map(pos, player_name)
|
||
end
|
||
|
||
if pos.z < minp.z then
|
||
maps.create_map(pos, player_name)
|
||
elseif pos.z > maxp.z then
|
||
maps.create_map(pos, player_name)
|
||
end
|
||
|
||
local x = (pos.x - minp.x - (size/2)) * 4
|
||
local y = (minp.z - pos.z) * 4 - 2
|
||
player:hud_change(
|
||
maps.dots[player_name],
|
||
"offset",
|
||
{
|
||
x = x,
|
||
y = y,
|
||
}
|
||
)
|
||
maps.posx[player_name] = pos.x
|
||
maps.posz[player_name] = pos.z
|
||
end
|
||
end
|
||
end
|
||
)
|