mirror of
https://github.com/sys4-fr/server-nalc.git
synced 2024-11-20 01:00:29 +01:00
383 lines
8.0 KiB
Lua
Executable File
383 lines
8.0 KiB
Lua
Executable File
local load_time_start = os.clock()
|
|
|
|
function vector.pos_to_string(pos)
|
|
return "{x="..pos.x.."; y="..pos.y.."; z="..pos.z.."}"
|
|
end
|
|
|
|
local r_corr = 0.25 --remove a bit more nodes (if shooting diagonal) to let it look like a hole (sth like antialiasing)
|
|
|
|
-- this doesn't need to be calculated every time
|
|
local f_1 = 0.5-r_corr
|
|
local f_2 = 0.5+r_corr
|
|
|
|
--returns information about the direction
|
|
local function get_used_dir(dir)
|
|
local abs_dir = {x=math.abs(dir.x), y=math.abs(dir.y), z=math.abs(dir.z)}
|
|
local dir_max = math.max(abs_dir.x, abs_dir.y, abs_dir.z)
|
|
if dir_max == abs_dir.x then
|
|
local tab = {"x", {x=1, y=dir.y/dir.x, z=dir.z/dir.x}}
|
|
if dir.x >= 0 then
|
|
tab[3] = "+"
|
|
end
|
|
return tab
|
|
end
|
|
if dir_max == abs_dir.y then
|
|
local tab = {"y", {x=dir.x/dir.y, y=1, z=dir.z/dir.y}}
|
|
if dir.y >= 0 then
|
|
tab[3] = "+"
|
|
end
|
|
return tab
|
|
end
|
|
local tab = {"z", {x=dir.x/dir.z, y=dir.y/dir.z, z=1}}
|
|
if dir.z >= 0 then
|
|
tab[3] = "+"
|
|
end
|
|
return tab
|
|
end
|
|
|
|
local function node_tab(z, d)
|
|
local n1 = math.floor(z*d+f_1)
|
|
local n2 = math.floor(z*d+f_2)
|
|
if n1 == n2 then
|
|
return {n1}
|
|
end
|
|
return {n1, n2}
|
|
end
|
|
|
|
local function return_line(pos, dir, range) --range ~= length
|
|
local tab = {}
|
|
local num = 1
|
|
local t_dir = get_used_dir(dir)
|
|
local dir_typ = t_dir[1]
|
|
if t_dir[3] == "+" then
|
|
f_tab = {0, range, 1}
|
|
else
|
|
f_tab = {0, -range, -1}
|
|
end
|
|
local d_ch = t_dir[2]
|
|
if dir_typ == "x" then
|
|
for d = f_tab[1],f_tab[2],f_tab[3] do
|
|
local x = d
|
|
local ytab = node_tab(d_ch.y, d)
|
|
local ztab = node_tab(d_ch.z, d)
|
|
for _,y in ipairs(ytab) do
|
|
for _,z in ipairs(ztab) do
|
|
tab[num] = {x=pos.x+x, y=pos.y+y, z=pos.z+z}
|
|
num = num+1
|
|
end
|
|
end
|
|
end
|
|
elseif dir_typ == "y" then
|
|
for d = f_tab[1],f_tab[2],f_tab[3] do
|
|
local xtab = node_tab(d_ch.x, d)
|
|
local y = d
|
|
local ztab = node_tab(d_ch.z, d)
|
|
for _,x in ipairs(xtab) do
|
|
for _,z in ipairs(ztab) do
|
|
tab[num] = {x=pos.x+x, y=pos.y+y, z=pos.z+z}
|
|
num = num+1
|
|
end
|
|
end
|
|
end
|
|
else
|
|
for d = f_tab[1],f_tab[2],f_tab[3] do
|
|
local xtab = node_tab(d_ch.x, d)
|
|
local ytab = node_tab(d_ch.y, d)
|
|
local z = d
|
|
for _,x in ipairs(xtab) do
|
|
for _,y in ipairs(ytab) do
|
|
tab[num] = {x=pos.x+x, y=pos.y+y, z=pos.z+z}
|
|
num = num+1
|
|
end
|
|
end
|
|
end
|
|
end
|
|
return tab
|
|
end
|
|
|
|
local function table_contains2(t, v)
|
|
for i = #t, 1, -1 do
|
|
if t[i] == v then
|
|
return true
|
|
end
|
|
end
|
|
return false
|
|
end
|
|
|
|
local function return_fine_line(pos, dir, range, scale)
|
|
local ps1 = return_line(vector.round(vector.multiply(pos, scale)), dir, range*scale)
|
|
local ps2 = {}
|
|
local ps2_num = 1
|
|
for _,p1 in ipairs(ps1) do
|
|
local p2 = vector.round(vector.divide(p1, scale))
|
|
if not table_contains2(ps2, p2) then
|
|
ps2[ps2_num] = p2
|
|
ps2_num = ps2_num+1
|
|
end
|
|
end
|
|
return ps2
|
|
end
|
|
|
|
function vector.fine_line(pos, dir, range, scale)
|
|
--assert_vector(pos)
|
|
if not range then --dir = pos2
|
|
dir = vector.direction(pos, dir)
|
|
range = vector.distance(pos, dir)
|
|
end
|
|
return return_fine_line(pos, dir, range, scale)
|
|
end
|
|
|
|
function vector.line(pos, dir, range, alt)
|
|
--assert_vector(pos)
|
|
if alt then
|
|
if not range then --dir = pos2
|
|
dir, range = vector.direction(pos, dir), vector.distance(pos, dir)
|
|
end
|
|
return return_line(pos, dir, range)
|
|
end
|
|
if range then --dir = pos2
|
|
dir = vector.round(vector.multiply(dir, range))
|
|
else
|
|
dir = vector.subtract(dir, pos)
|
|
end
|
|
local line,n = {},1
|
|
for _,i in ipairs(vector.threeline(dir.x, dir.y, dir.z)) do
|
|
line[n] = {x=pos.x+i[1], y=pos.y+i[2], z=pos.z+i[3]}
|
|
n = n+1
|
|
end
|
|
return line
|
|
end
|
|
|
|
local twolines = {}
|
|
function vector.twoline(x, y)
|
|
local pstr = x.." "..y
|
|
local line = twolines[pstr]
|
|
if line then
|
|
return line
|
|
end
|
|
line = {}
|
|
local n = 1
|
|
local dirx = 1
|
|
if x < 0 then
|
|
dirx = -dirx
|
|
end
|
|
local ymin, ymax = 0, y
|
|
if y < 0 then
|
|
ymin, ymax = ymax, ymin
|
|
end
|
|
local m = y/x --y/0 works too
|
|
local dir = 1
|
|
if m < 0 then
|
|
dir = -dir
|
|
end
|
|
for i = 0,x,dirx do
|
|
local p1 = math.max(math.min(math.floor((i-0.5)*m+0.5), ymax), ymin)
|
|
local p2 = math.max(math.min(math.floor((i+0.5)*m+0.5), ymax), ymin)
|
|
for j = p1,p2,dir do
|
|
line[n] = {i, j}
|
|
n = n+1
|
|
end
|
|
end
|
|
twolines[pstr] = line
|
|
return line
|
|
end
|
|
|
|
local threelines = {}
|
|
function vector.threeline(x, y, z)
|
|
local pstr = x.." "..y.." "..z
|
|
local line = threelines[pstr]
|
|
if line then
|
|
return line
|
|
end
|
|
if x ~= math.floor(x) then
|
|
minetest.log("error", "[vector_extras] INFO: The position used for vector.threeline isn't round.")
|
|
end
|
|
local two_line = vector.twoline(x, y)
|
|
line = {}
|
|
local n = 1
|
|
local zmin, zmax = 0, z
|
|
if z < 0 then
|
|
zmin, zmax = zmax, zmin
|
|
end
|
|
local m = z/math.hypot(x, y)
|
|
local dir = 1
|
|
if m < 0 then
|
|
dir = -dir
|
|
end
|
|
for _,i in ipairs(two_line) do
|
|
local px, py = unpack(i)
|
|
local ph = math.hypot(px, py)
|
|
local z1 = math.max(math.min(math.floor((ph-0.5)*m+0.5), zmax), zmin)
|
|
local z2 = math.max(math.min(math.floor((ph+0.5)*m+0.5), zmax), zmin)
|
|
for pz = z1,z2,dir do
|
|
line[n] = {px, py, pz}
|
|
n = n+1
|
|
end
|
|
end
|
|
threelines[pstr] = line
|
|
return line
|
|
end
|
|
|
|
function vector.straightdelay(s, v, a)
|
|
if not a then
|
|
return s/v
|
|
end
|
|
return (math.sqrt(v*v+2*a*s)-v)/a
|
|
end
|
|
|
|
vector.zero = {x=0, y=0, z=0}
|
|
|
|
function vector.sun_dir(time)
|
|
if not time then
|
|
time = minetest.get_timeofday()
|
|
end
|
|
local t = (time-0.5)*5/6+0.5 --the sun rises at 5 o'clock, not at 6
|
|
if t < 0.25
|
|
or t > 0.75 then
|
|
return
|
|
end
|
|
local tmp = math.cos(math.pi*(2*t-0.5))
|
|
return {x=tmp, y=math.sqrt(1-tmp*tmp), z=0}
|
|
end
|
|
|
|
function vector.inside(pos, minp, maxp)
|
|
for _,i in pairs({"x", "y", "z"}) do
|
|
if pos[i] < minp[i]
|
|
or pos[i] > maxp[i] then
|
|
return false
|
|
end
|
|
end
|
|
return true
|
|
end
|
|
|
|
function vector.minmax(p1, p2)
|
|
local p1 = vector.new(p1) --Are these 2 redefinitions necessary?
|
|
local p2 = vector.new(p2)
|
|
for _,i in ipairs({"x", "y", "z"}) do
|
|
if p1[i] > p2[i] then
|
|
p1[i], p2[i] = p2[i], p1[i]
|
|
end
|
|
end
|
|
return p1, p2
|
|
end
|
|
|
|
function vector.move(p1, p2, s)
|
|
return vector.round(
|
|
vector.add(
|
|
vector.multiply(
|
|
vector.direction(
|
|
p1,
|
|
p2
|
|
),
|
|
s
|
|
),
|
|
p1
|
|
)
|
|
)
|
|
end
|
|
|
|
local explosion_tables = {}
|
|
function vector.explosion_table(r)
|
|
local table = explosion_tables[r]
|
|
if table then
|
|
return table
|
|
end
|
|
|
|
local t1 = os.clock()
|
|
local tab, n = {}, 1
|
|
|
|
local tmp = r*r + r
|
|
for x=-r,r do
|
|
for y=-r,r do
|
|
for z=-r,r do
|
|
local rc = x*x+y*y+z*z
|
|
if rc <= tmp then
|
|
local np={x=x, y=y, z=z}
|
|
if math.floor(math.sqrt(rc) +0.5) > r-1 then
|
|
tab[n] = {np, true}
|
|
else
|
|
tab[n] = {np}
|
|
end
|
|
n = n+1
|
|
end
|
|
end
|
|
end
|
|
end
|
|
explosion_tables[r] = tab
|
|
minetest.log("info", string.format("[vector_extras] table created after ca. %.2fs", os.clock() - t1))
|
|
return tab
|
|
end
|
|
|
|
local circle_tables = {}
|
|
function vector.circle(r)
|
|
local table = circle_tables[r]
|
|
if table then
|
|
return table
|
|
end
|
|
|
|
local t1 = os.clock()
|
|
local tab, n = {}, 1
|
|
|
|
for i = -r, r do
|
|
for j = -r, r do
|
|
if math.floor(math.sqrt(i*i+j*j)+0.5) == r then
|
|
tab[n] = {x=i, y=0, z=j}
|
|
n = n+1
|
|
end
|
|
end
|
|
end
|
|
circle_tables[r] = tab
|
|
minetest.log("info", string.format("[vector_extras] table created after ca. %.2fs", os.clock() - t1))
|
|
return tab
|
|
end
|
|
|
|
local ring_tables = {}
|
|
function vector.ring(r)
|
|
local table = ring_tables[r]
|
|
if table then
|
|
return table
|
|
end
|
|
|
|
local t1 = os.clock()
|
|
local tab, n = {}, 1
|
|
|
|
local tmp = r*r
|
|
local p = {x=math.floor(r+0.5), z=0}
|
|
while p.x > 0 do
|
|
tab[n] = p
|
|
n = n+1
|
|
local p1, p2 = {x=p.x-1, z=p.z}, {x=p.x, z=p.z+1}
|
|
local dif1 = math.abs(tmp-p1.x*p1.x-p1.z*p1.z)
|
|
local dif2 = math.abs(tmp-p2.x*p2.x-p2.z*p2.z)
|
|
if dif1 <= dif2 then
|
|
p = p1
|
|
else
|
|
p = p2
|
|
end
|
|
end
|
|
|
|
local tab2, n = {}, 1
|
|
for _,i in ipairs(tab) do
|
|
for _,j in ipairs({
|
|
{i.x, i.z},
|
|
{-i.z, i.x},
|
|
{-i.x, -i.z},
|
|
{i.z, -i.x},
|
|
}) do
|
|
tab2[n] = {x=j[1], y=0, z=j[2]}
|
|
n = n+1
|
|
end
|
|
end
|
|
ring_tables[r] = tab2
|
|
minetest.log("info", string.format("[vector_extras] table created after ca. %.2fs", os.clock() - t1))
|
|
return tab2
|
|
end
|
|
|
|
function vector.chunkcorner(pos)
|
|
return {x=pos.x-pos.x%16, y=pos.y-pos.y%16, z=pos.z-pos.z%16}
|
|
end
|
|
|
|
dofile(minetest.get_modpath("vector_extras").."/vector_meta.lua")
|
|
|
|
minetest.log("info", string.format("[vector_extras] loaded after ca. %.2fs", os.clock() - load_time_start))
|