private List <BoidData> RelevantBoidData(BoidData self, BoidSettings settings, List <BoidData> boidDatum)
{
// Get those inside range
var relevants = boidDatum.FindAll(x =>
{
float d = Vector3.Distance(x.position, self.position); // d can't be negative
// if x not at self.position and weight at this distance is not null
return(d > 0 && settings.GetWeight(d) != 0);
});
if (settings.m_myBackCulling || settings.m_itsBackCulling)
{
// Back Culling
relevants = relevants.FindAll(x =>
{
Vector3 selfToX = x.position - self.position;
return((!settings.m_myBackCulling || Vector3.Dot(self.forward, selfToX) > 0) && // cull if x is in self's back
(!settings.m_itsBackCulling || Vector3.Dot(x.forward, -selfToX) > 0)); // cull if self is in x's back
});
}
return(relevants);
}
