public List <ScatterPhoton> Emit(float duration)
{
List <ScatterPhoton> ret = new List <ScatterPhoton>();
// Debug.LogFormat("Emitting energy {0}",energy);
for (int i = 0; i < energy; i++)
{
Vector3 emitPos = location + radius * TrailmeshMaker.onUnitSphere();
Vector3 perp = new Vector3(-directionPreference.y, directionPreference.x, 0);
if (directionPreference.z > 0.9)
{
perp = new Vector3(0, directionPreference.z, -directionPreference.y);
}
Quaternion rt = Quaternion.AngleAxis((float)RandomGen3.NextDouble() * 360, directionPreference);
perp = (rt * perp).normalized;
float angl = Mathf.PI * (1 - directionBias) * (float)RandomGen3.NextDouble();
Vector3 dir = (directionPreference * Mathf.Cos(angl) + perp * Mathf.Sin(angl)).normalized;
ScatterPhoton pht = new ScatterPhoton();
// Debug.LogFormat("Derection:{0} {1}", dir, angl);
pht.direction = dir;
pht.position = emitPos;
pht.timeOffset = timeOffset + duration * (float)RandomGen3.NextDouble();
ret.Add(pht);
}
// Debug.LogFormat("Emitted energy {0}", energy);
return(ret);
}
public void Propagate(float absorbtion, float scatter)// scatter length
{
float distance = TrailmeshMaker.DrawExp(scatter);
//Debug.LogFormat("Ran: {0} {1} {2}", distance, absorbtion, scatter);
float dur = distance / speed;
float decayprob = 1.0f - Mathf.Exp(-distance / absorbtion);
prevPosition = position;
prevTime = timeOffset;
position = position + direction * distance;
timeOffset += dur;
if (RandomGen3.NextDouble() <= decayprob)
{
decayed = true;
return;
}
direction = TrailmeshMaker.Scatter(direction);
}
