/// <summary>
/// Calculates the vector describing how "self" needs to move to get "separationDist" units away all other gas
/// particles in "others" while preserving its height above ground
/// </summary>
/// <returns>
/// a Vector3 describing the direction of movement neccessary to separate from other particles
/// </returns>
/// <param name="others">A List of gasparticles to separate from</param>
/// <param name="self">The Particle that needs to separate</param>
/// <param name="separationDist">A float describing how close particles may be to each other</param>
public Vector3 GetSeparationVector(List <GasParticle> others, GasParticle self, float separationDist)
{
var selfPos = self.transform.position;
var numParticles = others.Count;
var separationVector = Vector3.zero;
if (numParticles == 0)
{
return(Vector3.zero);
}
var countSeparators = 0;
foreach (var other in others)
{
if (other.Equals(self))
{
continue;
}
var otherPos = other.transform.position;
var dirToOther = selfPos - otherPos;
var distToOther = dirToOther.magnitude;
if (distToOther > separationDist)
{
continue;
}
if (distToOther < Mathf.Epsilon)
{
//the systems are located in exactly the same position, so they need to separate
var randomAngle = Random.value * 360f;
dirToOther = Quaternion.Euler(0f, randomAngle, 0f) * Vector3.forward;
}
separationVector += dirToOther.normalized * (separationDist - distToOther);
countSeparators++;
}
if (countSeparators > 0)
{
separationVector /= countSeparators;
}
return(separationVector);
}
/// <summary>
/// Adds a GasParticle to the list of active gasses that needs to be managed
/// </summary>
/// <param name="gas">The new GasParticle to be tracked</param>
public void RegisterGasParticle(GasParticle gas)
{
_activeGas.Add(gas);
}