private EmissionData GetInterpolatedEmissionData(float time)
{
if (emissionDataKeys.Count == 0)
{
return(new EmissionData());
}
var nearest = FindClosestIndex(emissionDataKeys, time);
var param0 = emissionDataKeys[nearest].Item1;
if (param0 >= time && nearest == 0)
{
return(emissionDataKeys[0].Item2);
}
else if (param0 <= time && nearest == emissionDataKeys.Count - 1)
{
return(emissionDataKeys[emissionDataKeys.Count - 1].Item2);
}
else if (param0 > time)
{
nearest--;
}
var param1 = emissionDataKeys[nearest + 1].Item1;
var alpha = (time - param0) / (param1 - param0);
var val0 = emissionDataKeys[nearest].Item2;
var val1 = emissionDataKeys[nearest + 1].Item2;
// use smoothstep
alpha = Mathf.SmoothStep(0, 1, Mathf.Clamp01(alpha));
return(EmissionData.Lerp(val0, val1, alpha));
}
public static EmissionData Lerp(EmissionData a, EmissionData b, float alpha)
{
var r = Mathf.Lerp(a.Radius, b.Radius, alpha);
return(new EmissionData(r));
}
