public void GetCameraSampleForPixels()
{
var start = new PixelCoordinate(0, 0);
var end = new PixelCoordinate(100, 100);
var area = new PixelArea(start, end);
var hs = new HaltonSampler(10, area);
var arena = new ObjectArena();
hs.StartPixel(in start);
var cs = hs.GetCameraSample(in start, arena);
cs.FilmPoint.X.Should().BeInRange(0f, 1f);
cs.FilmPoint.Y.Should().BeInRange(0f, 1f);
cs.LensPoint.X.Should().BeInRange(0f, 1f);
cs.LensPoint.Y.Should().BeInRange(0f, 1f);
var next = new PixelCoordinate(1, 0);
hs.StartPixel(in next);
var csn = hs.GetCameraSample(in next, arena);
csn.FilmPoint.X.Should().BeInRange(1f, 2f);
csn.FilmPoint.Y.Should().BeInRange(0f, 1f);
csn.LensPoint.X.Should().BeInRange(0f, 1f);
csn.LensPoint.Y.Should().BeInRange(0f, 1f);
cs.FilmPoint.X.Should().NotBe(csn.FilmPoint.X);
cs.FilmPoint.Y.Should().NotBe(csn.FilmPoint.Y);
cs.LensPoint.X.Should().NotBe(csn.LensPoint.X);
cs.LensPoint.Y.Should().NotBe(csn.LensPoint.Y);
}
public BVH(IPrimitive[] p, SplitMethod splitMethod, int maxPerNode = 1)
{
_p = p;
SplitMethod = splitMethod;
MaxPerNode = maxPerNode;
var primitiveInfo = new BVHPrimitiveInfo[p.Length];
for (var i = 0; i < primitiveInfo.Length; ++i)
{
primitiveInfo[i] = new BVHPrimitiveInfo(i, p[i].WorldBounds);
}
var ordered = new List <IPrimitive>(p);
var arena = new ObjectArena();
var totalNodes = 0;
var root = splitMethod == SplitMethod.HLBVH
? HLBVHBuild(arena, primitiveInfo, out totalNodes, ordered)
: RecursiveBuild(arena, primitiveInfo, 0, p.Length, ref totalNodes, ordered);
_p = ordered.ToArray();
_nodes = new LinearBVHNode[totalNodes];
var offset = 0;
FlattenBVHTree(root, ref offset);
arena.Clear();
}