public Spectrum UniformSampleAllLights(Interaction inter, Scene scene, Sampler sampler)
{
var L = Spectrum.Zero;
for (var l = 0; l < scene.Lights.Count; ++l)
{
var light = scene.Lights[l];
// Estimate direct lighting using the requested sample arrays
var lightPointArray = sampler.Get2DArray(lightSampleCounts[l]);
var scatteringArray = sampler.Get2DArray(lightSampleCounts[l]);
if (lightPointArray != null && scatteringArray != null)
{
var Ld = Spectrum.Zero;
for (var sample = 0; sample < light.SampleCount; ++sample)
{
Ld += EstimateDirect(inter, scatteringArray[sample], light, lightPointArray[sample], scene, sampler);
}
L += Ld / light.SampleCount;
}
// If not available, fall back to single sample estimates
else
{
var lightPoint = sampler.Get2D();
var scattering = sampler.Get2D();
L += EstimateDirect(inter, scattering, light, lightPoint, scene, sampler);
}
}
return(L);
}