llFrand Math Question

HIyas Everyone,

Can someone help me out with the math here? I would like to use llFrand to generate random RADIUS for particles. There is always a minimum distance of 1.75M that I want to maintain. And I have a MAX_RADIUS that I use as a variable. This is one of the ways I've tried but the particles do seem to bunch up at the 1.75M mark. And other ways that I've tried adds 1.75M to MAX_RADIUS. I would just like to keep it all between 1.75M and MAX_RAD. All help will be greatly appreciated.


float MAX_RAD = 5.0; // Max Radius Value
float trad; // Temp Radius Value
float RADIUS; // Particle Radius

timer()
{
trad = llFrand(MAX_RAD);
{if(RAD<1.75)
RADIUS = 1.75;
else
RADIUS = trad;
}
ParticleFunction();
}

trad = llFrand( MAX_RAD - 1.75 ); //Generate a random number up to 1.75 less than MAX_RAD.
RADIUS = 1.75 + trad; // add 1.75 to randomly-generated number above, ensuring it is always at least 1.75.

Yes, that function will tend to bunch them up at 1.75. The number you want to feed the random number function is the difference between your max and min, and then you want to add your min to the result.

float MIN_RAD = 1.75;
float MAX_RAD = 5.;
float rad;

timer()
{
rad = llFrand( MAX_RAD - MIN_RAD) + MIN_RAD;
}

Thanx Deanna and Anya!