/// <summary>
/// Returns a position randomly distributed inside a sphere of unit radius
/// centered at the origin. Orientation will be random and length will range
/// between 0 and 1
/// </summary>
/// <returns></returns>
public static Vector3 RandomVectorInUnitRadiusSphere()
{
Vector3 v = new Vector3();
do
{
v.X = (RandomHelpers.Random() * 2) - 1;
v.Y = (RandomHelpers.Random() * 2) - 1;
v.Z = (RandomHelpers.Random() * 2) - 1;
}while (v.Length() >= 1);
return(v);
}
/// <summary>
/// Returns a position randomly distributed on a disk of unit radius
/// on the XZ (Y=0) plane, centered at the origin. Orientation will be
/// random and length will range between 0 and 1
/// </summary>
/// <returns></returns>
public static Vector3 RandomVectorOnUnitRadiusXZDisk()
{
Vector3 v;
do
{
v.X = (RandomHelpers.Random() * 2) - 1;
v.Y = 0;
v.Z = (RandomHelpers.Random() * 2) - 1;
}while (v.Length() >= 1);
return(v);
}
public static float ScalarRandomWalk(float initial, float walkspeed, float min, float max)
{
float next = initial + (((RandomHelpers.Random() * 2) - 1) * walkspeed);
if (next < min)
{
return(min);
}
if (next > max)
{
return(max);
}
return(next);
}