public Node(PartitionPlane P, Voxel V, Node L = null, Node R = null)
{
partition = P;
bounds = V;
left = L;
right = R;
}
public Voxel[] Split(PartitionPlane P)
{
int cd = P.axis;
float maxBound = max[cd];
float minBound = min[cd];
float c1d, c2d;
c1d = P.center[cd] + ((maxBound - P.center[cd]) / 2);
c2d = P.center[cd] + ((minBound - P.center[cd]) / 2);
Vector c1 = Vector.Build.DenseOfVector(center);
Vector c2 = Vector.Build.DenseOfVector(center);
c1[cd] = c1d;
c2[cd] = c2d;
Vector s1 = Vector.Build.DenseOfVector(size);
Vector s2 = Vector.Build.DenseOfVector(size);
s1[cd] = Math.Abs(maxBound - P.center[cd]);
s2[cd] = Math.Abs(minBound - P.center[cd]);
Voxel v1 = new Voxel(c1, s1);
Voxel v2 = new Voxel(c2, s2);
return(new Voxel[] { v1, v2 });
}
private static PartitionPlane ComputePartitionPlane(List <Shape3D> L, Voxel V, int splitAxis)
{
L.Sort((a, b) =>
{
return((int)(a.center[splitAxis] - b.center[splitAxis]));
});
int i_m = (L.Count - 1) / 2;
var split = new PartitionPlane(L[i_m].center, splitAxis);
return(split);
}
public static World GetVoxelTestWorld(int width, int height)
{
// World world = GetDefaultWorld(width, height);
World world = new World(width, height);
// initialize light source
Vector lightPos = Vector.Build.DenseOfArray(new float[] { -3.0f, -3.0f, -3.0f });
LightSource l1 = new LightSource(lightPos, Rgba32.White, 95.5f);
world.AddLightSource(l1);
// initialize camera
Vector cameraPos = Vector.Build.DenseOfArray(new float[] { 0.0f, 0.0f, -3.0f });
Vector cameraUp = Vector.Build.DenseOfArray(new float[] { 0.0f, -1.0f, 0.0f });
Vector cameraLookAt = Vector.Build.DenseOfArray(new float[] { 0.0f, 0.0f, 0.0f });
world.cameras.Add(new Camera(cameraPos, cameraLookAt, cameraUp, world));
PhongIlluminationModel illuminationModel = new PhongIlluminationModel(world);
var c = Vector.Build.Dense(3);
c[0] = 0.0f;
c[1] = 0.0f;
c[2] = 0.0f;
var s = Vector.Build.DenseOfArray(new float[] { 1.0f, 1.0f, 1.0f });
var rmat = PhongMaterial.Red(illuminationModel);
var bmat = PhongMaterial.Blue(illuminationModel);
var gmat = PhongMaterial.Green(illuminationModel);
var p = new PartitionPlane(c, 1);
Voxel main = new Voxel(c, s);
Voxel[] split = main.Split(p);
Voxel left = new Voxel(split[0].center, split[0].size, rmat);
Voxel right = new Voxel(split[1].center, split[1].size, bmat);
for (int i = 0; i < 6; i++)
{
world.AddObject(left.planes[i]);
world.AddObject(right.planes[i]);
}
var smax = new Sphere(main.max, 0.05f, gmat);
var smin = new Sphere(main.min, 0.05f, gmat);
world.AddObject(smax);
world.AddObject(smin);
return(world);
}
