raze-gles/polymer/eduke32/source/lunatic/defs_common.lua

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-- This file contains LuaJIT definitions of stuff that's common to the game and
-- editor. The 'decl' function is expected to be defined in the global
-- environment.
-- See the included license file "BUILDLIC.TXT" for license info.
local ffi = require("ffi")
local ffiC = ffi.C
ffi.cdef "enum { _DEBUG_LUNATIC=1 }"
local bit = require("bit")
local math = require("math")
local string = require("string")
local table = require("table")
local assert = assert
local error = error
local pairs = pairs
local require = require
local setmetatable = setmetatable
local tostring = tostring
local type = type
local decl = decl
local getfenv = getfenv
decl "void OSD_Printf(const char *fmt, ...);"
print = function(str)
-- our "print" doesn't use the global "tostring", but the initial one
str = tostring(str)
if (type(str) ~= "string") then
error("invalid argument to print: must be convertible to a string")
end
ffiC.OSD_Printf("%s\n", str)
end
local print=print
module(...)
--== Core engine structs ==--
local SECTOR_STRUCT = [[
struct {
const int16_t wallptr, wallnum;
int32_t ceilingz, floorz;
uint16_t ceilingstat, floorstat;
const int16_t ceilingpicnum;
int16_t ceilingheinum;
int8_t ceilingshade;
uint8_t ceilingpal, ceilingxpanning, ceilingypanning;
const int16_t floorpicnum;
int16_t floorheinum;
int8_t floorshade;
uint8_t floorpal, floorxpanning, floorypanning;
uint8_t visibility, filler;
int16_t lotag, hitag, extra;
}]]
local SPRITE_STRUCT = [[
struct {
int32_t x, y, z;
uint16_t cstat;
const int16_t picnum;
int8_t shade;
uint8_t pal, clipdist, filler;
uint8_t xrepeat, yrepeat;
int8_t xoffset, yoffset;
const int16_t sectnum, statnum;
int16_t ang;
const int16_t owner;
int16_t xvel;
// NOTE: yvel is often used as player index in game code.
const int16_t yvel;
int16_t zvel;
int16_t lotag, hitag, extra;
}]]
local WALL_STRUCT = [[
struct {
int32_t x, y;
const int16_t point2, nextwall, nextsector;
uint16_t cstat;
const int16_t picnum, overpicnum;
int8_t shade;
uint8_t pal, xrepeat, yrepeat, xpanning, ypanning;
int16_t lotag, hitag, extra;
}]]
-- Converts a template struct definition to an internal, unrestricted one.
function strip_const(structstr)
return (string.gsub(structstr, "const ", ""));
end
-- NOTE for FFI definitions: we're compiling EDuke32 with -funsigned-char, so
-- we need to take care to declare chars as unsigned whenever it matters, for
-- example if it represents a palette index. (I think it's harmless for stuff
-- like passing a function argument, but it should be done there for clarity.)
-- TODO: provide getters for unsigned {hi,lo}tag?
ffi.cdef([[
typedef $ sectortype;
typedef $ walltype;
// NOTE: spritetype and tspritetype are different types with the same data members.
typedef $ spritetype;
typedef struct { spritetype; } tspritetype;
typedef struct {
const uint32_t mdanimtims;
const int16_t mdanimcur;
int16_t angoff, pitch, roll;
// TODO: make into an ivec3_t
int32_t xoff, yoff, zoff;
uint8_t flags;
uint8_t xpanning, ypanning;
const uint8_t filler;
float alpha;
union {
const intptr_t _tspr;
struct { const int32_t _dummy0, _dummy1; };
};
} spriteext_t;
typedef struct {
int32_t x, y, z;
} vec3_t;
typedef struct {
vec3_t pos;
int16_t sprite, wall, sect;
} hitdata_t;
]],
ffi.typeof(SECTOR_STRUCT), ffi.typeof(WALL_STRUCT),
ffi.typeof(SPRITE_STRUCT))
-- Define the "palette_t" type, which for us has .{r,g,b} fields and a
-- bound-checking array of length 3 overlaid.
-- TODO: bcarray really should allow to simply declare the struct with
-- passed member names instead of "hidden" ones... because wrapping it
-- in a union like this is doing things inside-out really.
local rgbarray_t = require("bcarray").new("uint8_t", 3, "RGB array")
ffi.cdef("typedef union { \
struct { uint8_t r, g, b, f; }; \
$ col; \
} palette_t", rgbarray_t)
assert(ffi.alignof("palette_t")==1)
local vec3_ct = ffi.typeof("vec3_t")
local hitdata_ct = ffi.typeof("hitdata_t")
decl[[const int32_t engine_main_arrays_are_static, engine_v8;]]
--== Engine data and functions ==--
-- NOTE TO SELF: This is not C, never EVER write
-- if (x)
-- when checking a C variable x for 'thuthiness'
if (ffiC.engine_main_arrays_are_static ~= 0) then
decl[[
sectortype sector[];
walltype wall[];
spritetype sprite[];
tspritetype tsprite[];
spriteext_t spriteext[];
]]
else
decl[[
sectortype *sector;
walltype *wall;
spritetype *sprite;
tspritetype *tsprite;
spriteext_t *spriteext;
]]
end
if (ffiC.engine_v8 == 0) then
-- V7
ffi.cdef[[
enum
{
MAXSECTORS = 1024,
MAXWALLS = 8192,
MAXSPRITES = 4096,
}
]]
else
-- V8
ffi.cdef[[
enum
{
MAXSECTORS = 4096,
MAXWALLS = 16384,
MAXSPRITES = 16384,
}
]]
end
ffi.cdef[[
enum {
MAXSTATUS = 1024,
MAXTILES = 30720,
MAXSPRITESONSCREEN = 4096,
MAXBUNCHES = 256,
CEILING = 0,
FLOOR = 1,
CLIPMASK0 = (1<<16)+1, // blocking
CLIPMASK1 = (256<<16)+64, // hittable
};
]]
ffi.cdef[[
const int16_t numsectors, numwalls;
const int32_t numyaxbunches; // XXX
const int32_t totalclock;
int32_t randomseed; // DEPRECATED
const int32_t xdim, ydim;
const int32_t windowx1, windowy1, windowx2, windowy2;
]]
decl[[
int32_t yxaspect, viewingrange;
int32_t spritesortcnt;
int32_t guniqhudid;
const int32_t rendmode;
const int16_t headspritesect[MAXSECTORS+1], headspritestat[MAXSTATUS+1];
const int16_t prevspritesect[MAXSPRITES], prevspritestat[MAXSPRITES];
const int16_t nextspritesect[MAXSPRITES], nextspritestat[MAXSPRITES];
const int16_t headsectbunch[2][MAXBUNCHES], nextsectbunch[2][MAXSECTORS];
int16_t yax_getbunch(int16_t i, int16_t cf);
int32_t getceilzofslopeptr(const sectortype *sec, int32_t dax, int32_t day);
int32_t getflorzofslopeptr(const sectortype *sec, int32_t dax, int32_t day);
void getzsofslopeptr(const sectortype *sec, int32_t dax, int32_t day,
int32_t *ceilz, int32_t *florz);
int32_t changespritesect(int16_t spritenum, int16_t newsectnum);
int32_t changespritestat(int16_t spritenum, int16_t newstatnum);
int32_t hitscan(const vec3_t *sv, int16_t sectnum, int32_t vx, int32_t vy, int32_t vz,
hitdata_t *hitinfo, uint32_t cliptype);
int32_t cansee(int32_t x1, int32_t y1, int32_t z1, int16_t sect1,
int32_t x2, int32_t y2, int32_t z2, int16_t sect2);
void neartag(int32_t xs, int32_t ys, int32_t zs, int16_t sectnum, int16_t ange, int16_t *neartagsector, int16_t *neartagwall,
int16_t *neartagsprite, int32_t *neartaghitdist, int32_t neartagrange, uint8_t tagsearch,
int32_t (*blacklist_sprite_func)(int32_t));
int32_t ldist(const spritetype *s1, const spritetype *s2);
int32_t dist(const spritetype *s1, const spritetype *s2);
int32_t inside(int32_t x, int32_t y, int16_t sectnum);
void updatesector(int32_t x, int32_t y, int16_t *sectnum);
void updatesectorbreadth(int32_t x, int32_t y, int16_t *sectnum);
void updatesectorz(int32_t x, int32_t y, int32_t z, int16_t *sectnum);
void rotatesprite(int32_t sx, int32_t sy, int32_t z, int16_t a, int16_t picnum,
int8_t dashade, unsigned char dapalnum, int32_t dastat,
int32_t cx1, int32_t cy1, int32_t cx2, int32_t cy2);
void setaspect(int32_t daxrange, int32_t daaspect);
]]
-- misc. functions
ffi.cdef[[
uint32_t getticks(void);
double gethitickms(void);
int32_t krand(void);
int32_t ksqrt(uint32_t num);
int32_t __fastcall getangle(int32_t xvect, int32_t yvect);
int32_t Mulscale(int32_t a, int32_t b, int32_t sh);
]]
local bcheck = require("bcheck")
local check_sector_idx = bcheck.sector_idx
local check_sprite_idx = bcheck.sprite_idx
local check_tile_idx = bcheck.tile_idx
local band = bit.band
local bor = bit.bor
local bnot = bit.bnot
local lshift = bit.lshift
local rshift = bit.rshift
local xor = bit.bxor
local ivec3_
local ivec3_mt = {
-- '^' is the "translate upwards" operator
__pow = function(v, zofs)
return ivec3_(v.x, v.y, v.z-zofs)
end,
__index = {
-- Manhattan distance with z right-shifted by 4 bits
blen1 = function(v)
return math.abs(v.x) + math.abs(v.y) + math.abs(bit.arshift(v.z,4))
end,
},
}
ivec3_ = ffi.metatype(vec3_ct, ivec3_mt)
local wallsofsec -- fwd-decl
local sectortype_ptr_ct = ffi.typeof("$ *", ffi.typeof(strip_const(SECTOR_STRUCT)))
local sectortype_mt = {
__index = {
--- Setters
set_ceilingpicnum = function(s, picnum)
check_tile_idx(picnum)
ffi.cast(sectortype_ptr_ct, s).ceilingpicnum = picnum
end,
set_floorpicnum = function(s, picnum)
check_tile_idx(picnum)
ffi.cast(sectortype_ptr_ct, s).floorpicnum = picnum
end,
--- Other methods
ceilingzat = function(s, pos)
return ffiC.getceilzofslopeptr(s, pos.x, pos.y)
end,
floorzat = function(s, pos)
return ffiC.getflorzofslopeptr(s, pos.x, pos.y)
end,
-- inside() port
contains = function(s, pos)
local x, y = pos.x, pos.y
local cnt = 0
for w in wallsofsec(s) do
local wal2 = ffiC.wall[ffiC.wall[w].point2]
local y1, y2 = ffiC.wall[w].y-y, wal2.y-y
if (xor(y1, y2) < 0) then
local x1, x2 = ffiC.wall[w].x-x, wal2.x-x
if (xor(x1, x2)>=0) then
cnt = xor(cnt, x1)
else
cnt = xor(cnt, xor(x1*y2-x2*y1, y2))
end
end
end
return (cnt < 0)
end,
}
}
ffi.metatype("sectortype", sectortype_mt)
local walltype_ptr_ct = ffi.typeof("$ *", ffi.typeof(strip_const(WALL_STRUCT)))
local walltype_mt = {
__index = {
--- Setters
set_picnum = function(w, picnum)
check_tile_idx(picnum)
ffi.cast(walltype_ptr_ct, w).picnum = picnum
end,
set_overpicnum = function(w, picnum)
check_tile_idx(picnum)
ffi.cast(walltype_ptr_ct, w).overpicnum = picnum
end,
_set_nextwall = function(w, nextwall)
-- XXX: this disallows making a red wall white
bcheck.wall_idx(nextwall)
ffi.cast(walltype_ptr_ct, w).nextwall = nextwall
end,
_set_nextsector = function(w, nextsector)
-- XXX: this disallows making a red wall white
check_sector_idx(nextsector)
ffi.cast(walltype_ptr_ct, w).nextsector = nextsector
end,
--- Predicates
isblocking = function(w)
return (band(w.cstat, 1)~=0)
end,
ismasked = function(w)
return (band(w.cstat, 16)~=0)
end,
isoneway = function(w)
return (band(w.cstat, 32)~=0)
end,
ishittable = function(w)
return (band(w.cstat, 64)~=0)
end,
}
}
ffi.metatype("walltype", walltype_mt)
local spriteext_mt = {
__index = {
-- Enable EVENT_ANIMATESPRITES for this sprite.
make_animated = function(sx)
sx.flags = bor(sx.flags, 16)
end,
},
}
ffi.metatype("spriteext_t", spriteext_mt)
local spritetype_ptr_ct = ffi.typeof("$ *", ffi.typeof(strip_const(SPRITE_STRUCT)))
-- NOTE: this is the *protected* tspritetype pointer.
local tspritetype_ptr_ct = ffi.typeof("$ *", ffi.typeof("tspritetype"))
local spritetype_mt = {
__pow = function(s, zofs)
return ivec3_(s.x, s.y, s.z-zofs)
end,
__index = {
--- Setters
set_picnum = function(s, tilenum)
check_tile_idx(tilenum)
ffi.cast(spritetype_ptr_ct, s).picnum = tilenum
end,
_set_yvel = function(s, yvel)
-- XXX: no protection against malicious use (might set picnum to
-- another one temporarily)
-- XXX: this belongs into game-side Lunatic
if (s.picnum==1405) then -- APLAYER
error("setting yvel on an APLAYER sprite forbidden", 2)
end
ffi.cast(spritetype_ptr_ct, s).yvel = yvel
end,
_set_owner = function(s, owner)
check_sprite_idx(owner)
ffi.cast(spritetype_ptr_ct, s).owner = owner
end,
--- Custom setters
set_cstat_bits = function(s, bits)
s.cstat = bor(s.cstat, bits)
end,
clear_cstat_bits = function(s, bits)
s.cstat = band(s.cstat, bnot(bits))
end,
},
}
local function deep_copy(tab)
local ntab = {}
for key, val in pairs(tab) do
if (type(val)=="table") then
ntab[key] = deep_copy(val)
else
assert(type(val)=="function")
ntab[key] = val
end
end
return ntab
end
local tspritetype_mt = deep_copy(spritetype_mt)
local function get_sprite_idx(spr)
local i = ffi.cast(spritetype_ptr_ct, spr)-ffi.cast(spritetype_ptr_ct, ffiC.sprite)
assert(not (i >= ffiC.MAXSPRITES+0ULL))
return i
end
-- Methods that are specific to sprites
function spritetype_mt.__index.setpos(spr, pos) -- setsprite() clone
spr.x, spr.y, spr.z = pos.x, pos.y, pos.z
local newsect = updatesector(spr, spr.sectnum)
if (newsect < 0) then
return -1
end
ffiC.changespritesect(get_sprite_idx(spr), newsect)
return newsect
end
-- Methods that are specific to tsprites
function tspritetype_mt.__index.dup(tspr)
if (ffiC.spritesortcnt >= ffiC.MAXSPRITESONSCREEN+0ULL) then
return nil
end
local newtspr = ffiC.tsprite[ffiC.spritesortcnt]
ffi.copy(newtspr, tspr, ffi.sizeof(tspr))
ffiC.spritesortcnt = ffiC.spritesortcnt+1
return newtspr
end
function tspritetype_mt.__index.getspr(tspr)
return sprite[tspr.owner]
end
-- The user of this module can insert additional "spritetype" index
-- methods and register them with "ffi.metatype".
function finish_spritetype(mt_index)
for name, func in pairs(mt_index) do
spritetype_mt.__index[name] = func
tspritetype_mt.__index[name] = func
end
ffi.metatype("spritetype", spritetype_mt)
ffi.metatype("tspritetype", tspritetype_mt)
end
---=== Restricted access to C variables from Lunatic ===---
-- set metatable and forbid setting it further
function setmtonce(tab, mt)
mt.__metatable = true
return setmetatable(tab, mt)
end
---- indirect C array access ----
-- create a safe indirection for an ffi.C array
function creategtab(ctab, maxidx, name)
local tab = {}
local tmpmt = {
__index = function(tab, key)
if (key>=0 and key < maxidx) then
return ctab[key]
end
error('out-of-bounds '..name..' read access', 2)
end,
__newindex = function()
error('cannot write directly to '..name, 2)
end,
}
return setmtonce(tab, tmpmt)
end
-- Construct const struct from table
function conststruct(tab)
local strtab = { "const struct { int32_t " }
local vals = {}
for member, val in pairs(tab) do
strtab[#strtab+1] = member..","
vals[#vals+1] = val
end
strtab[#strtab] = strtab[#strtab]:gsub(',',';')
strtab[#strtab+1] = "}"
return ffi.new(table.concat(strtab), vals)
end
-- Static, non-instance members. Used to hold constants, for example
-- sprite.CSTAT.TRANSLUCENT1
local static_members = { sector={}, wall={}, sprite={} }
static_members.sector.STAT = conststruct
{
MASKED = 128,
-- NOTE the reversed order
TRANSLUCENT2 = 128,
TRANSLUCENT1 = 256,
TRANSLUCENT_BOTH_BITS = 256+128,
}
static_members.wall.CSTAT = conststruct
{
MASKED = 64,
TRANSLUCENT1 = 128,
TRANSLUCENT2 = 512,
TRANSLUCENT_BOTH_BITS = 512+128,
}
static_members.sprite.CSTAT = conststruct
{
TRANSLUCENT1 = 2,
TRANSLUCENT2 = 512,
TRANSLUCENT_BOTH_BITS = 512+2,
}
local sms = static_members.sprite
sms._headspritesect = creategtab(ffiC.headspritesect, ffiC.MAXSECTORS, 'headspritesect[]')
-- NOTE: don't allow freelist access
sms._headspritestat = creategtab(ffiC.headspritestat, ffiC.MAXSTATUS, 'headspritestat[]')
sms._nextspritesect = creategtab(ffiC.nextspritesect, ffiC.MAXSPRITES, 'nextspritesect[]')
sms._nextspritestat = creategtab(ffiC.nextspritestat, ffiC.MAXSPRITES, 'nextspritestat[]')
sms._prevspritesect = creategtab(ffiC.prevspritesect, ffiC.MAXSPRITES, 'prevspritesect[]')
sms._prevspritestat = creategtab(ffiC.prevspritestat, ffiC.MAXSPRITES, 'prevspritestat[]')
function static_members.sprite.changesect(spritenum, sectnum)
check_sprite_idx(spritenum)
check_sector_idx(sectnum)
if (ffiC.changespritesect(spritenum, sectnum)==-1) then
error("cannot change sector number of sprite not in the game world", 2)
end
end
function static_members.sprite.changestat(spritenum, statnum)
check_sprite_idx(spritenum)
if (statnum >= ffiC.MAXSTATUS+0ULL) then
error("invalid status number "..statnum, 2)
end
if (ffiC.changespritestat(spritenum, statnum)==-1) then
error("cannot change status number of sprite not in the game world", 2)
end
end
function GenStructMetatable(Structname, Boundname, StaticMembersTab)
StaticMembersTab = StaticMembersTab or static_members[Structname]
return {
__index = function(tab, key)
if (type(key)=="number") then
if (key >= 0 and key < ffiC[Boundname]) then
return ffiC[Structname][key]
end
error("out-of-bounds "..Structname.."[] read access", 2)
elseif (type(key)=="string") then
return StaticMembersTab[key]
end
end,
__newindex = function() error("cannot write directly to "..Structname.."[]", 2) end,
}
end
local sector_mt = GenStructMetatable("sector", "numsectors")
local wall_mt = GenStructMetatable("wall", "numwalls")
local sprite_mt = GenStructMetatable("sprite", "MAXSPRITES")
local atsprite_mt = {
__index = function(tab, idx)
check_sprite_idx(idx)
local tspr = ffi.cast(tspritetype_ptr_ct, ffiC.spriteext[idx]._tspr)
if (tspr == nil) then
error("tsprite of actor "..idx.." unavailable", 2)
end
-- Return a reference to a tsprite[] element.
return tspr[0]
end,
__newindex = function() error('cannot write directly to atsprite[]', 2) end,
}
local vars_to_ignore = {}
for varname,_ in pairs(getfenv(1)) do
if (ffiC._DEBUG_LUNATIC ~= 0) then
print("IGNORE "..varname)
end
vars_to_ignore[varname] = true
end
--== ALL GLOBALS FROM HERE ON ARE EXPORTED UPWARDS (see create_globals() below) ==--
sector = setmtonce({}, sector_mt)
wall = setmtonce({}, wall_mt)
sprite = setmtonce({}, sprite_mt)
spriteext = creategtab(ffiC.spriteext, ffiC.MAXSPRITES, 'spriteext[]')
atsprite = setmtonce({}, atsprite_mt)
local function iter_wallsofsec(endwall, w)
w = w+1
if (w < endwall) then
return w
end
end
wallsofsec = function(sec) -- local
return iter_wallsofsec, sec.wallptr+sec.wallnum, sec.wallptr-1
end
function wallsofsect(sect)
check_sector_idx(sect)
return iter_wallsofsec, sector[sect].wallptr+sector[sect].wallnum, sector[sect].wallptr-1
end
--== Per-sector/per-statnum sprite iterators ==--
local function iter_spritesofsect(sect, i)
if (i < 0) then
i = ffiC.headspritesect[sect]
else
i = ffiC.nextspritesect[i]
end
if (i >= 0) then return i end
end
function spritesofsect(sect)
check_sector_idx(sect)
return iter_spritesofsect, sect, -1
end
local function iter_spritesofstat(stat, i)
if (i < 0) then
i = ffiC.headspritestat[stat]
else
i = ffiC.nextspritestat[i]
end
if (i >= 0) then return i end
end
function spritesofstat(stat)
if (stat >= ffiC.MAXSTATUS+0ULL) then
error("passed invalid statnum to spritesofstat iterator", 2)
end
return iter_spritesofstat, stat, -1
end
--== TROR iterators ==--
local function iter_sectorsofbunch(cf, i)
if (i < 0) then
i = ffiC.headsectbunch[cf][-i-1];
else
i = ffiC.nextsectbunch[cf][i];
end
if (i >= 0) then return i end
end
function sectorsofbunch(bunchnum, cf)
if (bunchnum >= ffiC.numyaxbunches+0ULL) then
error("passed invalid bunchnum to sectorsofbunch iterator", 2)
end
if (not (cf == 0 or cf == 1)) then
error("passed invalid 'cf' to sectorsofbunch iterator, must be 0 or 1", 2)
end
return iter_sectorsofbunch, cf, -bunchnum-1
end
function getbunch(sectnum, cf)
check_sector_idx(sectnum)
if (not (cf == 0 or cf == 1)) then
error("passed invalid 'cf' to getbunch, must be 0 or 1", 2)
end
return ffiC.yax_getbunch(sectnum, cf)
end
---=== Engine functions, wrapped for Lua convenience ===---
-- returns a hitdata_ct
-- TODO: make v[xyz] be passed as one aggregate, too?
-- Additionally, permit different coordinates? (ang&horiz, ...)
function hitscan(pos, sectnum, vx,vy,vz, cliptype)
check_sector_idx(sectnum)
local vec = vec3_ct(pos.x, pos.y, pos.z)
local hitdata = hitdata_ct()
ffiC.hitscan(vec, sectnum, vx,vy,vz, hitdata, cliptype)
return hitdata
end
function cansee(pos1,sect1, pos2,sect2)
check_sector_idx(sect1)
check_sector_idx(sect2)
local ret = ffiC.cansee(pos1.x,pos1.y,pos1.z, sect1,
pos2.x,pos2.y,pos2.z, sect2)
return (ret~=0)
end
ffi.cdef[[
typedef struct {
int32_t sector, wall, sprite;
int32_t dist;
} neartag_ret_t;
]]
local neartag_ret_ct = ffi.typeof("const neartag_ret_t")
local function newar() return ffi.new("int16_t [1]") end
-- TODO: make tagsearch something more convenient
function neartag(pos, sectnum, ang, range, tagsearch)
check_sector_idx(sectnum)
local a, b, c, d = newar(), newar(), newar(), ffi.new("int32_t [1]")
ffiC.neartag(pos.x, pos.y, pos.z, sectnum, ang, a, b, c, d, range, tagsearch, nil)
return neartag_ret_ct(a[0], b[0], c[0], d[0])
end
function inside(pos, sectnum)
check_sector_idx(sectnum)
return (ffiC.inside(pos.x, pos.y, sectnum)==1)
end
-- TODO: should these rather be one function, and the specific kind of updating
-- controlled by an argument?
function updatesector(pos, sectnum)
local sect = ffi.new("int16_t [1]")
sect[0] = sectnum
ffiC.updatesector(pos.x, pos.y, sect)
return sect[0]
end
function updatesectorbreadth(pos, sectnum)
local sect = ffi.new("int16_t [1]")
sect[0] = sectnum
ffiC.updatesectorbreadth(pos.x, pos.y, sect)
return sect[0]
end
function updatesectorz(pos, sectnum)
local sect = ffi.new("int16_t [1]")
sect[0] = sectnum
ffiC.updatesectorz(pos.x, pos.y, pos.z, sect)
return sect[0]
end
function printf(fmt, ...)
print(string.format(fmt, ...))
end
-- This is supposed to be run from the file that 'require's this module to take
-- over the non-local variables from here into its global environment.
function create_globals(_G_their)
local _G_our = getfenv(1)
vars_to_ignore["create_globals"] = true
for varname,obj in pairs(_G_our) do
if (not vars_to_ignore[varname]) then
if (ffiC._DEBUG_LUNATIC ~= 0) then
print("EXPORT "..varname)
end
_G_their[varname] = obj
end
end
end