public Diffuse(Color albedo, AbstractSampler <Vector3> sampler = null)
{
_sampler = sampler ??
new ThreadSafeSampler <Vector3>(Vec3Sampling.UniformSphere, 10000, 8,
Vec3Sampling.ToSphereSurface);
Albedo = new SolidColor(albedo);
}
public Diffuse(ITexture albedo, AbstractSampler <Vector3> sampler = null)
{
_sampler = sampler ??
new ThreadSafeSampler <Vector3>(Vec3Sampling.UniformSphere, 10000, 8,
Vec3Sampling.ToSphereSurface);
Albedo = albedo;
}
// https://raytracing.github.io/books/RayTracingTheNextWeek.html#boundingvolumehierarchies
public BvhNode(List <IHittable> srcObjects, int start, int end, AbstractSampler <int> sampler = null)
{
sampler ??= new ThreadSafeSampler <int>(count => IntSampling.Random(count, 0, 3), SAMPLES);
var objects = srcObjects;
int axis = sampler.GetSample();
int Comparator(IHittable a, IHittable b) => BoxCompare(a, b, axis);
int objectSpan = end - start;
switch (objectSpan)
{
case 1:
_left = _right = objects[start];
break;
case 2 when Comparator(objects[start], objects[start + 1]) < 0:
_left = objects[start];
_right = objects[start + 1];
break;
case 2:
_left = objects[start + 1];
_right = objects[start];
break;
default:
objects.Sort(start, objectSpan - 1, new FuncComparer <IHittable>(Comparator));
int mid = start + objectSpan / 2;
_left = new BvhNode(objects, start, mid, sampler);
_right = new BvhNode(objects, mid, end, sampler);
break;
}
var boxLeft = _left.BoundingBox();
var boxRight = _right.BoundingBox();
_box = boxLeft + boxRight;
}
public Refractive(ITexture albedo, float refractiveIndex, AbstractSampler <float> sampler = null)
{
Albedo = albedo;
RefractiveIndex = refractiveIndex;
_sampler = sampler ?? new ThreadSafeSampler <float>(FloatSampling.Random, 10000);
}
public Refractive(Color albedo, float refractiveIndex, AbstractSampler <float> sampler = null)
{
Albedo = new SolidColor(albedo);
RefractiveIndex = refractiveIndex;
_sampler = sampler ?? new ThreadSafeSampler <float>(FloatSampling.Random, 10000);
}
public Reflective(ITexture albedo, float disturbance = 0, AbstractSampler <Vector3> sampler = null)
{
_sampler = sampler ?? new ThreadSafeSampler <Vector3>(Vec3Sampling.UniformSphere, 10000, 8);
Albedo = albedo;
Disturbance = disturbance;
}