36 lignes
1.4 KiB
Lua
36 lignes
1.4 KiB
Lua
QuestHelper_File["collect_location.lua"] = "1.4.0"
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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 strchar(c)
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end
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local function float(c)
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if c then
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c = math.floor(c * 16777216 + 0.5) -- 24 bits of fraction baby
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QuestHelper: Assert(c >= -2147483647 and c < 2147483647)
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else
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c = -2147483648
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end
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if c < 0 then c = c + 4294967296 end
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return strchar(bit.band(c, 0xff), bit.band(c, 0xff00) / 256, bit.band(c, 0xff0000) / 65536, bit.band(c, 0xff000000) / 16777216)
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end
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local function BolusizeLocation(delayed, c, z, x, y)
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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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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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