LlFrand: Difference between revisions

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The random number generator is not a source of entropy.
The random number generator is not a source of entropy.

Revision as of 10:04, 13 February 2007

Summary

Function: float llFrand( float mag );
0.0 Forced Delay
10.0 Energy

Returns a float that is pseudo random number in the range [0.0,mag) or (mag, 0.0].

• float mag Any valid float value

Specification

returns a pseudo random number in range [0.0, mag) or (mag, 0.0], depending upon the sign of mag.

Examples

<lsl> default {

   touch_start(integer total_number)
   {
       // When touched, say "Heads" with probability 0.5, 
       // otherwise, say "Tails."
       if ( llFrand(1.) < .5)
           llSay(0, "Heads");
       else
           llSay(0, "Tails");
   }

}

</lsl>

Notes

The random number generator is not a source of entropy.

The sequence of random numbers are shared across the entire process, and not independently seeded. Therefore, the pseudo random number generation is not suitable for any application which requires completely predictable or completely unpredictable results.

Deep Notes

Signature

function float llFrand( float mag );