Float question

[ime]

I'm having trouble with turning a 4byte number into its float equal. I guess I'm just missing something cause I can not find a straight answer really on google so thought I would try here.

I have a hex, 44 58 OC 92 so lets say:

Code: Select all

 number = tonumber("44580C92",16) 

Turning the hex into a the number, 1146621074, how would I get it into float form?

I see that memoryReadFloat is doing it, im guessing thats a custom function in c/c++ that you created. Will I need to do that and recompile or is there an a easier way?

[Administrator]

I have no idea how you would do this, or why you would need to. Where are you getting that hex notation from?

memoryReadInt()/memoryReadFloat() makes use of C type casting, so there really isn't any special code you would need to use to convert it. Lua numbers are 'typeless' in that they can represent both integers and floats or doubles, so I doubt there really is any built-in way to do this in Lua.

[ime]

I have micromacro receiving packet data, which is where the hex comes from. In game that hex is a float for x,y,z coordinates.

converting that Hex into a number, I get the number "1146621074", if I view it as a float it would be 864.196411132813, which is what I want, just not sure how to do this with lua

[Administrator]

A quick google search has brought up a few useful articles on doing this. It's a lot of do-it-yourself, though. You'll have to understand the math, and write a bit of code to handle extracting the sign, exponent, fraction, and bias from the number.

Anyways, check these:
http://www.psc.edu/general/software/pac ... e/ieee.php
http://steve.hollasch.net/cgindex/coding/ieeefloat.html