3 decimal of a float value in VEX or VOP

[cgmagic]

How do I get 3 decimal of a float value in VEX or VOP ?

There is a rint() but this only convert to integer.

[fsimerey]

f@y = rint(@P.y * 1000) / 1000;

If you want 3 decimal for a string, with zero on decimal, you must extract fraction and decimal, then concatenate those in string.

[fsimerey]

float a = 179.9996;
string trunc = itoa(int(trunc(a)));
int ifrac = int(rint(frac(a)*1000));
string frac = "000";
if (ifrac == 1000) {
    trunc = itoa(int(trunc(a)) +1); 
}
else {
    frac = sprintf("%03d", ifrac);
}
s@result = trunc + "." + frac;

Here the solution for string.

Edited December 9, 2016 by fsimerey

[f1480187]

string whole = itoa((int) some_float);
string fract = sprintf("%f", frac(some_float));
string result = whole + fract[1:4];

Here is what I used a couple of times.

[fsimerey]

18 minutes ago, f1480187 said:

string whole = itoa((int) some_float);
string fract = sprintf("%f", frac(some_float));
string result = whole + fract[1:4];

Here is what I used a couple of times.

Like your solution but the round result is not accurate.

Try it with 3 decimals and 0.9996

Your solution result with 0.999 when the accurate must give 1.000