public Triangle(Vertex u, Vertex v, Vertex w, int group)
{
this.u = u;
this.v = v;
this.w = w;
this.n = KCLWriter.unit(KCLWriter.cross(v.sub(u), w.sub(u)));
this.group = group;
}
}//End of Octree constructor
//Constructor for creating nodes in the octree
public Octree(Vertex bas, float width, List <int> indices, List <Triangle> triangles, int max_triangles, float min_width)
{
Vertex centre = bas.add(new Vertex(width, width, width).truediv(2f));
this.triangles = triangles;
this.max_triangles = max_triangles;
this.min_width = min_width;
this.width_x /= 2f;
this.width_y /= 2f;
this.width_z /= 2f;
this.base_width = KCLWriter.min(width_x, width_y, width_z);
this.bas = new Vertex(width / 2f, width / 2f, width / 2f);
foreach (int i in indices)
{
if (KCLWriter.tribox_overlap(this.triangles[i], centre, width / 2f))
{
this.indices.Add(i);
}
}
this.is_leaf = true;
//Console.WriteLine("node hw: " + width / 2f + " num of indices: " + this.indices.Count);
if (this.indices.Count > this.max_triangles && width >= (2 * this.min_width))
{
for (int k = 0; k < 2; k++)
{
for (int j = 0; j < 2; j++)
{
for (int i = 0; i < 2; i++)
{
this.children.Add(new Octree(bas.add(new Vertex((float)i, (float)j, (float)k).truediv(2f).mul(width)), width / 2,
this.indices, this.triangles, this.max_triangles, this.min_width));
}
}
}
this.indices.Clear();
this.is_leaf = false;
}
}
//Base octree constructor
public Octree(List <Triangle> triangles, int max_triangles, float min_width)
{
this.triangles = triangles;
this.max_triangles = max_triangles;
this.min_width = min_width;
float min_x = 0, min_y = 0, min_z = 0, max_x = 0, max_y = 0, max_z = 0;
foreach (Triangle t in triangles)
{
float min_x0 = KCLWriter.min(KCLWriter.min(t.u.x.theValue, t.v.x.theValue, t.w.x.theValue));
if (min_x0 < min_x)
{
min_x = min_x0;
}
float min_y0 = KCLWriter.min(KCLWriter.min(t.u.y.theValue, t.v.y.theValue, t.w.y.theValue));
if (min_y0 < min_y)
{
min_y = min_y0;
}
float min_z0 = KCLWriter.min(KCLWriter.min(t.u.z.theValue, t.v.z.theValue, t.w.z.theValue));
if (min_z0 < min_z)
{
min_z = min_z0;
}
float max_x0 = KCLWriter.max(KCLWriter.max(t.u.x.theValue, t.v.x.theValue, t.w.x.theValue));
if (max_x0 > max_x)
{
max_x = max_x0;
}
float max_y0 = KCLWriter.max(KCLWriter.max(t.u.y.theValue, t.v.y.theValue, t.w.y.theValue));
if (max_y0 > max_y)
{
max_y = max_y0;
}
float max_z0 = KCLWriter.max(KCLWriter.max(t.u.z.theValue, t.v.z.theValue, t.w.z.theValue));
if (max_z0 > max_z)
{
max_z = max_z0;
}
}
// If model only uses two axes, eg. flat square, the base width will get set to min_width (1) which can
// create an octree with 100's of thousands of tiny empty or almost empty nodes is very computationally expensive
if (max_x == 0)
{
max_x = KCLWriter.max(max_y, max_z);
}
if (max_y == 0)
{
max_y = KCLWriter.max(max_x, max_z);
}
if (max_z == 0)
{
max_z = KCLWriter.max(max_x, max_y);
}
this.width_x = (float)Math.Pow(2, (int)(Math.Ceiling(Math.Log(KCLWriter.max(max_x - min_x, min_width), 2))));
this.width_y = (float)Math.Pow(2, (int)(Math.Ceiling(Math.Log(KCLWriter.max(max_y - min_y, min_width), 2))));
this.width_z = (float)Math.Pow(2, (int)(Math.Ceiling(Math.Log(KCLWriter.max(max_z - min_z, min_width), 2))));
this.base_width = KCLWriter.min(width_x, width_y, width_z);
this.bas = new Vertex(min_x, min_y, min_z);
this.nx = (int)Math.Floor(this.width_x / this.base_width);
this.ny = (int)Math.Floor(this.width_y / this.base_width);
this.nz = (int)Math.Floor(this.width_z / this.base_width);
List <int> ind = new List <int>();
for (int i = 0; i < triangles.Count; i++)
{
ind.Add(i);
}
for (int k = 0; k < this.nz; k++)
{
for (int j = 0; j < this.ny; j++)
{
for (int i = 0; i < this.nx; i++)
{
this.children.Add(new Octree(this.bas.add((new Vertex(i, j, k)).mul(this.base_width)), this.base_width,
ind, this.triangles, this.max_triangles, this.min_width));
}
}
}
}//End of Octree constructor
protected KCL CallKCLWriter(NitroFile modelFile, ModelBase model, string fileName, float scale, float faceSizeThreshold,
Dictionary<string, int> matColTypes, bool save = true)
{
AbstractModelWriter kclWriter = new KCLWriter(model, modelFile, scale, faceSizeThreshold, matColTypes);
kclWriter.WriteModel(save);
return new KCL(modelFile);
}
