public Vector3D Sample()
{
Vector3D output;
IntervalSampler sampler = m_sampler;
output.X = sampler.Sample(out sampler);
if (sampler != null)
{
output.Y = sampler.Sample(out sampler);
}
else
{
output.Y = MyUtils.GetRandomDouble(m_bBox.Min.Y, m_bBox.Max.Y);
}
if (sampler != null)
{
output.Z = sampler.Sample(out sampler);
}
else
{
output.Z = MyUtils.GetRandomDouble(m_bBox.Min.Z, m_bBox.Max.Z);
}
System.Diagnostics.Debug.Assert(sampler == null, "Inconsistency in MyBBSetSampler");
return(output);
}
public double Sample(out IntervalSampler childSampler)
{
// TODO: Implement divide & conquer for speedup
double sample = MyUtils.GetRandomDouble(0.0, TotalWeight);
double lastLimit = m_min;
double lastWeight = 0.0;
for (int i = 0; i < m_entries.Count; ++i)
{
if (m_entries[i].CumulativeWeight >= sample)
{
childSampler = m_entries[i].Sampler;
double weightRange = m_entries[i].CumulativeWeight - lastWeight;
double t = (sample - lastWeight) / weightRange;
return(t * m_entries[i].UpperLimit + (1.0 - t) * lastLimit);
}
lastLimit = m_entries[i].UpperLimit;
lastWeight = m_entries[i].CumulativeWeight;
}
System.Diagnostics.Debug.Assert(false, "Shouldn't get here!");
childSampler = null;
return(m_max);
}