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101 lines
2.7 KiB
Text
101 lines
2.7 KiB
Text
-- definitions of BUILD and game types for the Lunatic Interpreter
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-- INTERNAL!
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local ffi = require("ffi")
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-- sector, wall, sprite
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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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int16_t point2, nextwall, nextsector, 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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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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#pragma pack(pop)
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]]
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ffi.cdef[[
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sectortype *sector;
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walltype *wall;
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spritetype *sprite;
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const int16_t numsectors, numwalls;
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]]
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--
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sector = {}
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local tmpmt = {
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__index = function(tab, key)
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if (key >= 0 and key < ffi.C.numsectors) then return ffi.C.sector[key] end
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error('out-of-bounds sector[] read access')
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end,
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__newindex = function(tab, key, val) error('cannot write to sector[] structs directly') end
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}
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setmetatable(sector, tmpmt)
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wall = {}
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local tmpmt = {
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__index = function(tab, key)
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if (key >= 0 and key < ffi.C.numwalls) then return ffi.C.wall[key] end
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error('out-of-bounds wall[] read access')
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end,
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__newindex = function(tab, key, val) error('cannot write to wall[] structs directly') end
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}
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setmetatable(wall, tmpmt)
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sprite = {}
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local tmpmt = {
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__index = function(tab, key)
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-- MAXSPRITES == 16384
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if (key >= 0 and key < 16384) then return ffi.C.sprite[key] end
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error('out-of-bounds sprite[] read access')
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end,
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__newindex = function(tab, key, val) error('cannot write to sprite[] structs directly') end
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}
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setmetatable(sprite, tmpmt)
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-- yes, this does export a couple of other stuff that users ought not see,
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-- but without the ffi.cdef declarations, they will just sit there and
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-- refuse to be accessed.
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gv = ffi.C
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-- nope, this would create two numeric variables with their initial values, but
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-- certainly not references to numsectors and numwalls like we want:
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--numsectors = ffi.C.numsectors
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--numwalls = ffi.C.numwalls
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