mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-11-11 15:21:48 +00:00
354 lines
8.9 KiB
Lua
354 lines
8.9 KiB
Lua
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-- This file contains LuaJIT definitions of stuff that's common to the game and
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-- editor. The 'decl' is expected to be defined in the global environment.
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local ffi = require("ffi")
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local ffiC = ffi.C
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local error = error
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local pairs = pairs
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local setmetatable = setmetatable
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local decl = decl
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local getfenv = getfenv
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local print=print
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module(...)
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--== Core engine structs ==--
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ffi.cdef[[
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#pragma pack(push,1)
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typedef struct
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{
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const int16_t wallptr, wallnum;
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int32_t ceilingz, floorz;
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int16_t ceilingstat, floorstat;
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int16_t ceilingpicnum, ceilingheinum;
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int8_t ceilingshade;
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uint8_t ceilingpal, ceilingxpanning, ceilingypanning;
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int16_t floorpicnum, floorheinum;
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int8_t floorshade;
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uint8_t floorpal, floorxpanning, floorypanning;
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uint8_t visibility, filler;
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int16_t lotag, hitag, extra;
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} sectortype;
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typedef struct
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{
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int32_t x, y;
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const int16_t point2, nextwall, nextsector;
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int16_t cstat;
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int16_t picnum, overpicnum;
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int8_t shade;
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uint8_t pal, xrepeat, yrepeat, xpanning, ypanning;
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int16_t lotag, hitag, extra;
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} walltype;
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typedef struct
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{
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int32_t x, y, z;
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int16_t cstat, picnum;
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int8_t shade;
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uint8_t pal, clipdist, filler;
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uint8_t xrepeat, yrepeat;
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int8_t xoffset, yoffset;
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const int16_t sectnum, statnum;
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int16_t ang, owner, xvel, yvel, zvel;
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int16_t lotag, hitag, extra;
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} spritetype;
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typedef struct {
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const uint32_t mdanimtims;
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const int16_t mdanimcur;
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int16_t angoff, pitch, roll;
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int32_t xoff, yoff, zoff;
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uint8_t flags;
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uint8_t xpanning, ypanning;
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const uint8_t filler;
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float alpha;
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const int32_t _do_not_use1;
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const int32_t _do_not_use2;
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} spriteext_t;
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typedef struct {
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int32_t x, y, z;
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} vec3_t;
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typedef struct {
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vec3_t pos;
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int16_t sprite, wall, sect;
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} hitdata_t;
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typedef struct {
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char r,g,b,f;
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} palette_t;
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#pragma pack(pop)
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]]
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local vec3_ct = ffi.typeof("vec3_t")
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local hitdata_ct = ffi.typeof("hitdata_t")
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ffi.cdef[[const int32_t engine_main_arrays_are_static, engine_v8;]]
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--== Engine data and functions ==--
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-- NOTE TO SELF: This is not C, never EVER write
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-- if (x)
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-- when checking a C variable x for 'thuthiness'
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if (ffiC.engine_main_arrays_are_static ~= 0) then
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decl[[
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sectortype sector[];
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walltype wall[];
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spritetype sprite[];
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spriteext_t spriteext[];
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]]
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else
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decl[[
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sectortype *sector;
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walltype *wall;
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spritetype *sprite;
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spriteext_t *spriteext;
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]]
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end
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if (ffiC.engine_v8 == 0) then
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-- V7
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ffi.cdef[[
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enum
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{
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MAXSECTORS = 1024,
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MAXWALLS = 8192,
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MAXSPRITES = 4096,
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}
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]]
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else
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-- V8
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ffi.cdef[[
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enum
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{
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MAXSECTORS = 4096,
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MAXWALLS = 16384,
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MAXSPRITES = 16384,
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}
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]]
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end
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ffi.cdef[[
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enum {
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MAXSTATUS = 1024,
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MAXTILES = 30720,
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MAXBUNCHES = 256,
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CEILING = 0,
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FLOOR = 1,
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CLIPMASK0 = (1<<16)+1, // blocking
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CLIPMASK1 = (256<<16)+64, // hittable
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};
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]]
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ffi.cdef[[
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const int16_t numsectors, numwalls;
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const int32_t numyaxbunches;
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const int32_t totalclock;
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const int32_t xdim, ydim;
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]]
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decl[[
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const int16_t headspritesect[MAXSECTORS+1], headspritestat[MAXSTATUS+1];
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const int16_t prevspritesect[MAXSPRITES], prevspritestat[MAXSPRITES];
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const int16_t nextspritesect[MAXSPRITES], nextspritestat[MAXSPRITES];
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const int16_t headsectbunch[2][MAXBUNCHES], nextsectbunch[2][MAXSECTORS];
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int16_t yax_getbunch(int16_t i, int16_t cf);
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int32_t hitscan(const vec3_t *sv, int16_t sectnum, int32_t vx, int32_t vy, int32_t vz,
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hitdata_t *hitinfo, uint32_t cliptype);
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void rotatesprite(int32_t sx, int32_t sy, int32_t z, int16_t a, int16_t picnum,
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int8_t dashade, char dapalnum, int32_t dastat,
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int32_t cx1, int32_t cy1, int32_t cx2, int32_t cy2);
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]]
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-- misc. functions
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ffi.cdef[[
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int32_t ksqrt(uint32_t num);
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double gethitickms(void);
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]]
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---=== Restricted access to C variables from Lunatic ===---
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-- set metatable and forbid setting it further
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function setmtonce(tab, mt)
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mt.__metatable = true
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return setmetatable(tab, mt)
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end
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---- indirect C array access ----
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local sector_mt = {
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__index = function(tab, key)
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if (key >= 0 and key < ffiC.numsectors) then return ffiC.sector[key] end
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error('out-of-bounds sector[] read access', 2)
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end,
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__newindex = function(tab, key, val) error('cannot write directly to sector[] struct', 2) end,
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}
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local wall_mt = {
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__index = function(tab, key)
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if (key >= 0 and key < ffiC.numwalls) then return ffiC.wall[key] end
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error('out-of-bounds wall[] read access', 2)
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end,
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__newindex = function(tab, key, val) error('cannot write directly to wall[] struct', 2) end,
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}
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-- create a safe indirection for an ffi.C array
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function creategtab(ctab, maxidx, name)
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local tab = {}
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local tmpmt = {
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__index = function(tab, key)
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if (key>=0 and key < maxidx) then
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return ctab[key]
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end
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error('out-of-bounds '..name..' read access', 2)
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end,
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__newindex = function(tab, key, val)
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error('cannot write directly to '..name, 2)
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end,
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}
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return setmtonce(tab, tmpmt)
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end
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local vars_to_ignore = {}
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for varname,_ in pairs(getfenv(1)) do
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-- print("IGNORE "..varname)
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vars_to_ignore[varname] = true
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end
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--== ALL GLOBALS FROM HERE ON ARE EXPORTED UPWARDS (see create_globals() below) ==--
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sector = setmtonce({}, sector_mt)
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wall = setmtonce({}, wall_mt)
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sprite = creategtab(ffiC.sprite, ffiC.MAXSPRITES, 'sprite[] struct')
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spriteext = creategtab(ffiC.spriteext, ffiC.MAXSPRITES, 'spriteext[] struct')
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headspritesect = creategtab(ffiC.headspritesect, ffiC.MAXSECTORS, 'headspritesect[]')
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-- TODO: allow sprite freelist access via the status list for CON compatibility?
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headspritestat = creategtab(ffiC.headspritestat, ffiC.MAXSTATUS, 'headspritestat[]')
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nextspritesect = creategtab(ffiC.nextspritesect, ffiC.MAXSPRITES, 'nextspritesect[]')
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nextspritestat = creategtab(ffiC.nextspritestat, ffiC.MAXSPRITES, 'nextspritestat[]')
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prevspritesect = creategtab(ffiC.prevspritesect, ffiC.MAXSPRITES, 'prevspritesect[]')
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prevspritestat = creategtab(ffiC.prevspritestat, ffiC.MAXSPRITES, 'prevspritestat[]')
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--== Per-sector/per-statnum sprite iterators ==--
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local function iter_spritesofsect(sect, i)
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if (i < 0) then
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i = ffiC.headspritesect[sect]
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else
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i = ffiC.nextspritesect[i]
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end
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if (i >= 0) then return i end
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end
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function spritesofsect(sect)
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if (sect < 0 or sect >= ffiC.numsectors) then
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error("passed invalid sectnum to spritesofsect iterator", 2)
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end
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return iter_spritesofsect, sect, -1
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end
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local function iter_spritesofstat(stat, i)
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if (i < 0) then
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i = ffiC.headspritestat[stat]
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else
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i = ffiC.nextspritestat[i]
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end
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if (i >= 0) then return i end
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end
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function spritesofstat(stat)
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if (stat < 0 or stat >= ffiC.MAXSTATUS) then
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error("passed invalid statnum to spritesofstat iterator", 2)
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end
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return iter_spritesofstat, stat, -1
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end
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--== TROR iterators ==--
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local function iter_sectorsofbunch(cf, i)
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if (i < 0) then
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i = ffiC.headsectbunch[cf][-i-1];
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else
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i = ffiC.nextsectbunch[cf][i];
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end
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if (i >= 0) then return i end
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end
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function sectorsofbunch(bunchnum, cf)
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if (bunchnum < 0 or bunchnum >= ffiC.numyaxbunches) then
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error("passed invalid bunchnum to sectorsofbunch iterator", 2)
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end
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if (cf ~= 0 and cf ~= 1) then
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error("passed invalid 'cf' to sectorsofbunch iterator, must be 0 or 1", 2)
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end
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return iter_sectorsofbunch, cf, -bunchnum-1
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end
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function getbunch(sectnum, cf)
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if (sectnum < 0 or sectnum >= ffiC.numsectors) then
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error('passed out-of-bounds sector number '..sectnum, 2)
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end
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if (cf ~= 0 and cf ~= 1) then
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error("passed invalid 'cf' to getbunch, must be 0 or 1", 2)
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end
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return ffiC.yax_getbunch(sectnum, cf)
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end
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---=== Engine functions, wrapped for Lua convenience ===---
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-- returns a hitdata_ct
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-- TODO: make v[xyz] be passed as one aggregate, too?
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-- Additionally, permit different coordinates? (ang&horiz, ...)
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function hitscan(pos, sectnum, vx,vy,vz, cliptype)
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if (sectnum < 0 or sectnum >= ffiC.numsectors) then
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error('passed out-of-bounds sector number '..sectnum, 2)
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end
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local vec = vec3_ct(pos.x, pos.y, pos.z)
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local hitdata = hitdata_ct()
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ffiC.hitscan(vec, sectnum, vx,vy,vz, hitdata, cliptype)
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return hitdata
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end
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-- This is supposed to be run from the file that 'require's this module to take
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-- over the non-local variables from here into the global environment.
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function create_globals(_G_their)
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local _G_our = getfenv(1)
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vars_to_ignore["create_globals"] = true
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for varname,obj in pairs(_G_our) do
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if (not vars_to_ignore[varname]) then
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-- print("EXPORT "..varname)
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_G_their[varname] = obj
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end
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end
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end
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