private void ComputeAverageLuminance()
{
const int stepSize = 20;
const float stepSizeF = stepSize;
int numSteps = Height / stepSize;
const float offsetStep = stepSizeF * 4;
LuminanceSamples.Clear();
var query = new LightingQuery(Environment);
var tp = new Squared.Util.Win32TimeProvider();
long startTicks = tp.Ticks;
Parallel.For(
0, numSteps,
() => new List<float>(),
(yStep, state, samples) => {
float y = yStep * stepSizeF;
float xOffset = (y % offsetStep) / 8f;
float localWidth = Width + xOffset;
for (Vector2 position = new Vector2(xOffset, y); position.X < localWidth; position.X += stepSizeF) {
var sample = query.ComputeReceivedLightAtPosition(position);
var sampleLuminance = (sample.X * 0.299f) + (sample.Y * 0.587f) + (sample.Z * 0.114f);
samples.Add(sampleLuminance);
}
return samples;
},
(samples) => {
lock (LuminanceSamples)
LuminanceSamples.AddRange(samples);
}
);
long endTicks = tp.Ticks;
TickCountSamples.Add(endTicks - startTicks);
if (TickCountSamples.Count > RollingLength)
TickCountSamples.RemoveAt(0);
LuminanceSamples.Sort();
int outliersToSkip = (LuminanceSamples.Count * 4) / 100;
float accumulator = 0;
int count = 0;
for (int i = outliersToSkip, e = Math.Max(LuminanceSamples.Count - outliersToSkip - 1, 0); i < e; i++) {
accumulator += LuminanceSamples[i];
count += 1;
}
AverageLuminance = (accumulator / count) * LuminanceScaler;
RollingAverageSamples.Add(AverageLuminance);
if (RollingAverageSamples.Count > RollingLength)
RollingAverageSamples.RemoveAt(0);
}
private void ComputeAverageLuminance()
{
const int stepSize = 20;
const float stepSizeF = stepSize;
int numSteps = Height / stepSize;
const float offsetStep = stepSizeF * 4;
LuminanceSamples.Clear();
var query = new LightingQuery(Environment, true);
var tp = new Squared.Util.Win32TimeProvider();
long startTicks = tp.Ticks;
Parallel.For(
0, numSteps,
() => new List <float>(),
(yStep, state, samples) => {
float y = yStep * stepSizeF;
float xOffset = (y % offsetStep) / 8f;
float localWidth = Width + xOffset;
Vector4 sample;
for (Vector2 position = new Vector2(xOffset, y); position.X < localWidth; position.X += stepSizeF)
{
if (query.ComputeReceivedLightAtPosition(position, out sample))
{
var sampleLuminance = (sample.X * 0.299f) + (sample.Y * 0.587f) + (sample.Z * 0.114f);
samples.Add(sampleLuminance);
}
}
return(samples);
},
(samples) => {
lock (LuminanceSamples)
LuminanceSamples.AddRange(samples);
}
);
long endTicks = tp.Ticks;
TickCountSamples.Add(endTicks - startTicks);
if (TickCountSamples.Count > RollingLength)
{
TickCountSamples.RemoveAt(0);
}
LuminanceSamples.Sort();
int outliersToSkip = (LuminanceSamples.Count * 4) / 100;
float accumulator = 0;
int count = 0;
for (int i = outliersToSkip, e = Math.Max(LuminanceSamples.Count - outliersToSkip - 1, 0); i < e; i++)
{
accumulator += LuminanceSamples[i];
count += 1;
}
AverageLuminance = (accumulator / count) * LuminanceScaler;
RollingAverageSamples.Add(AverageLuminance);
if (RollingAverageSamples.Count > RollingLength)
{
RollingAverageSamples.RemoveAt(0);
}
}
