random() in N increments?

[Orion]

Hi, is there a way to for example return a random number between 5 and 15 in 5 point increments?

Any help appreciated.


EDIT: Is that form right?

Code: Select all

float(float min, float max, float inc) incrandom =
{
   local float i, j;
   
   j = ceil(random()*max);
   if (j < min)
      return min;
   
   i = min;
   while (i < j)
   {
      i = i + inc;
   }
   
   return i;
};


[Downsider]

Why don't you just get an integer between 0 - 2 and mutiply it by 5, then add 5?

[Wazat]

Uncompiled and untested code below. If it isn't completely right it will hopefully help you anyway.

Code: Select all

float(float min, float max, float inc) incrandom =
{
  float range;
  range = (max - min) / inc;

  range = rint(range * random());
  return min + range*inc;
}

Assuming min and max are both increments of inc, this will give you what you want. It's up to the user to pass in valid data. You could add some code to the top of the function to ensure inc divides evenly, if you have a modulus function. Or just trust that min and max really are what the user wants.