Thyme math issues

[Ivan]

1. Division of a float with zero returns +inf.
2. math.toInt(+inf) and math.toInt(NaN) return -2147483648.

Examples:

Code: Select all

> 0.0 / 0
+inf

> 1.0 / 0
+inf

> math.toInt(+inf)
-2147483648

> math.toInt(NaN)
-2147483648

[Kilinich]

and? is it a problem?

[electronicboy]

The problem with this is that there is 2 options; diving by 0 can either return 0 or +inf.
although you are taught in school that when you divide be 0, you get 0, when actually, you can put millions upon billions of 0 into any number, this +inf is technically correct, while 0 is more of a standard in school teaching.

[Kilinich]

ohh, common, just add <>0 check in your code.

[Ivan]

To electronicboy:
Thanks for your reply! I am aware of that. The problem was more with math.toInt(+inf) and 0.0/0 which should give NaN (or 0 to keep is simple) because 0 : x = 0, x : x = 1 and x : 0 = ±inf.

To Kilinich:
The code would look neater if there was no need for <>0 check.

[Conundrumer]

The value of +inf or NaN in hex is 0x80000000, when converted to signed int, literally translates to the most negative number. Ints don't have +inf or NaN, so unless you want the program to crash or throw an exception, that's the only option you have. Of course, you can do the <>0 check instead. Algodoo wasn't designed to handle poor scripting.

[Ivan]

Thanks for clarifying me some things, Conundrummer.