104 lignes
2.8 KiB
Lua
104 lignes
2.8 KiB
Lua
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local GetTime = QuestHelper_GetTime
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QuestHelper_File["collect_location.lua"] = "4.0.1.$svnversion$"
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QuestHelper_Loadtime["collect_location.lua"] = GetTime()
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-- little endian two's complement
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local function signed(c)
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QuestHelper: Assert(not c or c >= -127 and c < 127)
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if not c then c = -128 end
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if c < 0 then c = c + 256 end
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return c
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--return strchar(c)
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end
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local dec2hex = {[0] = "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"}
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local hex2dec = {}
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for k, v in pairs(dec2hex) do hex2dec[v] = k end
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local function tohex(c)
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return dec2hex[c]
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end
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local function lgToDec(c, pos)
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if not c or c == "" then return 0 end
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local ret = 0
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pos = pos or 0
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if pos == 0 then c = string.reverse(c) end
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ret = todec(string.sub(c,1,1)) * math.pow(16, pos) + lgToDec(string.sub(c, 2), pos + 1)
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return ret
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end
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local function lgToHex(c, pos)
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local ret, rem, hex
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pos = pos or 0
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c = c or 0
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local minVal = math.pow(16, pos)
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local maxVal = math.pow(16, pos+1) - 1
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if c > maxVal then
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rem, hex = lgToHex(c, pos + 1)
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else
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rem, hex = c, ""
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end
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local mult = 0
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while rem >= minVal do
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mult = mult + 1
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rem = rem - minVal
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end
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return rem, hex .. tohex(mult)
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end
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local function todec(c)
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return hex2dec[c]
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end
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local function float(c)
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-- if not c then c = -128 end
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-- QuestHelper: Assert( c >= -128, string.format("c is too small. It is %s.", tostring(c)))
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-- QuestHelper: Assert( c < 128, string.format("c is too big. It is %s.", tostring(c)))
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local ret = tohex(math.floor(128 * c))
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return ret
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end
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local function BolusizeLocation(delayed, c, z, x, y, dl, mid, mf, f)
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-- c and z are *signed* integers that fit within an 8-bit int.
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-- x and y are floating-point values, generally between 0 and 1. We'll dedicate 24 bits to the fractional part, largely because we can.
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-- Overall we're using a weird 11 bytes on this. Meh.
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-- Also, any nil values are being turned into MIN_WHATEVER.
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local float_x = x
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local float_y = y
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local loc = {}
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--local locStr = (delayed and 1 or 0) .. lgToHex(mid) .. tohex(dl) .. float(x) .. float(y)
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loc["delayed"] = (delayed and 1 or 0)
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loc["c"] = c
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loc["z"] = z
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loc["x"] = float_x
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loc["y"] = float_y
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loc["dungeonLevel"] = dl
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loc["mapid"] = mid
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loc["mapfile"] = mf
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loc["facing"] = f
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return loc;
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--return string.format("%s,%s,%s,%s,%s", signed(delayed and 1 or 0), signed(c), signed(z), float_x, float_y)
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--return signed(delayed and 1 or 0) .. signed(c) .. signed(z) .. float_x .. float_y
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end
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-- This merely provides another API function
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function QH_Collect_Location_Init(_, API)
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API.Callback_LocationBolus = BolusizeLocation -- Yeah. *Bolusize*. You heard me.
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API.Callback_LocationBolusCurrent = function () return BolusizeLocation(API.Callback_Location_Raw()) end -- This is just a convenience function, really
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end
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