public void TreadSafeSamplerReturnsAllItsElementsForEachThread()
{
const int samplesCount = 100;
List <int> Generator(int count) => Enumerable.Range(0, count).ToList();
ThreadSafeSampler <int> sampler = new ThreadSafeSampler <int>(Generator, samplesCount);
List <int> allSamples = Generator(samplesCount);
Parallel.For(0, 1000, _ =>
{
List <int> returnedSamples = Enumerable.Range(0, samplesCount).Select(i => sampler.Sample).ToList();
returnedSamples.Should().BeEquivalentTo(allSamples);
});
}
public void TreadSafeSamplerShouldBeThreadSafe()
{
const int samplesCount = 1;
List <int> Generator(int count) => Enumerable.Range(0, count).ToList();
ThreadSafeSampler <int> sampler = new ThreadSafeSampler <int>(Generator, samplesCount);
Action action = () =>
{
Parallel.For(0, 1000, _ =>
{
for (; _ < 1000; _++)
{
sampler.GetSample();
}
});
};
action.Should().NotThrow();
}
public override void Render(Scene scene, Camera camera)
{
scene.Preprocess();
if (camera is LensCamera lensCamera && lensCamera.AutoFocus)
{
var ray = lensCamera.GetRay(0.5f, 0.5f);
var hitInfo = new HitInfo();
var hit = scene.HitTest(ray, ref hitInfo, 0.001f, float.PositiveInfinity);
if (hit)
{
lensCamera.FocusDistance = hitInfo.Distance;
}
else
{
lensCamera.FocusDistance = 100000f;
}
}
int width = Resolution;
int height = (int)(width / camera.AspectRatio);
var image = new Texture(width, height);
AbstractSampler <Vector2> sampler = new ThreadSafeSampler <Vector2>(Sampling, Samples);
for (int k = 0; k < Samples; k++)
{
try
{
Parallel.For(0, width, new ParallelOptions {
CancellationToken = CancellationToken
}, i =>
{
for (int j = 0; j < height; j++)
{
var sample = sampler.GetSample(k);
float u = (i + sample.X) / (width - 1);
float v = (j + sample.Y) / (height - 1);
Ray ray = camera.GetRay(u, v);
var shade = Shade(ray, scene, MaxDepth);
image.Bloom(shade, i, j, (int)shade.GetBrightness(), Bloom);
image[i, j] += shade;
}
});
}
catch (Exception e)
{
Log.Warn(e);
}
if (CancellationToken.IsCancellationRequested)
{
return;
}
if (k % SamplesRenderStep == 0 || k == Samples - 1)
{
var output = new Texture(image);
output.Process(c => (c / (k + 1)).Clamp());
if (GammaCorrection)
{
output.AutoGammaCorrect();
}
var percentage = (k + 1) * 100 / Samples;
OnFrameReady?.Invoke(percentage, output);
}
}
}
