How much closer to zero where you expecting? 5 to the power of 10 to the
-14 is zero to the limits of modern PCs.
If you want to deal with integers make the numbers integers. If you do
your math in floating point with a mantissa with lots of bits, you are
going to get some bits left over at the end.
The machine is doing all of its math in binary and some/many decimal
numbers can not be represented exactly in binary.
Think of 1/3+1/3+1/3 != .33+.33+.33 It is not just machines that have
the problem.
You can never compare a floating point number to zero and expect your
code to work reliably. Convert the result of modulus to an integer and
compare that to 0.
Ron
Paul Steven wrote:
Experiencing a strange problem using the modulus operator.
Inside a function I have the following code:
var vValue1 = passed_MC._x - this.Maze_Horizontal_offset;
var vValue2 = 36;
var vTheResult = vValue1 % vValue2;
trace ("vValue1 = " + vValue1);
trace ("vTheResult = " + Number(vTheResult));
And here are the results I am getting from the trace statements:
vValue1 = 324
vTheResult = 5.6843418860808e-14
----------------
Surely it should give me a result of zero as 36 goes into 324 exactly 9
times.
The weird thing is if I just hard code the values as follows, it works
var vValue1 = 324;
var vValue2 = 36;
var vTheResult = vValue1 % vValue2;
trace ("vTheResult = " + Number(vTheResult));
-----------------
And here is the result of the trace statement:
vTheResult = 0
I am therefore totally confused!!!
Any help much appreciated. I am publishing for Flash 7 with Actionscript 1.0
Thanks
Paul
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