Random number help please

Hi, this is probably a simple answer. What I am trying to do is have one state pick a number out of 4 and then have the object say the number and then to go onto another state from each different number picked.

For example you touch the object then it says "2" when you touch it again it will goto the next state

This is all I could think up from reading other posts: but it doesn't work



Thank you =)

First, you were calling the Rand function on each comparison. Assign it to a variable once, then check that variable multiple times.

float randf=llFrand(4.0);

Now you have your FLOAT, e.g. 1.123958

"
llFrand
float llFrand(float mag);

Returns a pseudo-random number between 0 and mag.
"

Then use llRound to get an integer

integer rand=llRound(randf);

then compare that...

default
{
state_entry()
{llSay(0, "Hello, Avatar!";}

touch_start(integer total_number)
{
float randf=llFrand(4.0);
integer rand=llRound(randf);
if (rand == 0)
{llSay(0, "0";}
if (rand == 1 )
{llSay(0, "1";}
if (rand == 2 )
{llSay(0, "2";}
if (rand == 3 )
{llSay(0, "3";}
}
}

if you round the number, you may sometimes wind up with a number higher than the desired max. For example, a 4.8 would round to 5.

Use this method in stead to convert to an integer.

integer rand=(integer)randf;

(in stead of)
integer rand=llRound(randf);

Save a precious few lines of code, skip the rounding and say

  if (fRand < 1.0)  {llSay(0, "0");}  
  if (fRand < 2.0 ) {llSay(0, "1");}  
  if (fRand < 3.0 ) {llSay(0, "2");} 
  else {llSay(0, "3");} 

You'll want else's on that, Wed...

float num = llFrand( 4 );
if ( num < 1.0 )
    llWhisper( 0, "First!" );
else if ( num < 2.0 )
    llWhisper( 0, "Second!" );
else if ( num < 3.0 )
    llWhisper( 0, "Third!" );
... etc

And the range of the returned value is [0,mag). This means that if mag is 4, llFrand will never return exactly 4, but it could return 0. It might get to 3.999999999, but never 4.

And rounding won't work since anything less than .5 becomes 0 and from .5 to anything less than 1.5 becomes 1. So zero only gets half the probability of 1.

0,1,1,2,2,3,3,4

instead of

0,0,1,1,2,2,3,3

Oop, thanks.