/// <summary>
/// Create a new renderer
/// </summary>
/// <param name="scene">the scene to render</param>
/// <param name="sampler">the sampler</param>
/// <param name="camera">the camera</param>
/// <param name="film">the film to write to</param>
/// <param name="integrator">the surface integrator</param>
public Renderer(Scene scene, Sampler sampler, Camera camera, Film film, Integrator integrator)
{
Film = film;
Scene = scene;
Sampler = sampler;
Camera = camera;
Integrator = integrator;
}
/// <summary>
/// Compute radiance for a sample
/// </summary>
/// <param name="sample"></param>
/// <param name="ray"></param>
/// <returns></returns>
public SampledSpectrum Li(Sample sample, Ray ray = null)
{
ray = ray ?? Camera.GenerateRay(sample);
var intersection = new Intersection();
var spectrum = SampledSpectrum.Black();
if (Scene.TryToIntersect(ray, ref intersection))
{
spectrum = Integrator.Li(Scene, ray, this, sample, ref intersection);
}
else
{
spectrum = Scene.Lights.Aggregate(spectrum, (current, light) => current + light.Le(ray));
}
return(spectrum);
}