void buildMesh()
{
HE_Mesh mesh = new HE_Mesh();
mesh = container.get();
meshes.Add(mesh);
centers.Add(new PVector());
}
public override void mousePressed()
{
PVector O = new PVector(random(-S, S), random(-S, S), random(-S, S));
Plane P = new Plane(O, new PVector(random(-1, 1), random(-1, 1), random(-1, 1)));
List <HE_Mesh> newMeshes = new List <HE_Mesh> ();
List <PVector> newCenters = new List <PVector> ();
for (int i = 0; i < meshes.Count; i++)
{
HE_Mesh mesh = (HE_Mesh)meshes [i];
HE_Mesh mesh2 = mesh.get();
mesh.cutMesh(P, new PVector());
mesh2.cutMesh(P, new PVector(2 * O.x, 2 * O.y, 2 * O.z));
newMeshes.Add(mesh);
newMeshes.Add(mesh2);
PVector center = new PVector();
for (int j = 0; j < mesh.vertices.Count; j++)
{
HE_Vertex v = (HE_Vertex)mesh.vertices [j];
center.add(v);
}
center.div(mesh.vertices.Count);
newCenters.Add(center);
center = new PVector();
for (int j = 0; j < mesh2.vertices.Count; j++)
{
HE_Vertex v = (HE_Vertex)mesh2.vertices [j];
center.add(v);
}
center.div(mesh2.vertices.Count);
newCenters.Add(center);
}
meshes = newMeshes;
centers = newCenters;
//
drawMesh();
}
// A hack-n-slash approach to voronoi, literally. The individual cells are created by iteratively splitting
// the container mesh by the bisector planes of all other points. (Bisector plane = plane perpendicular to line
// between two points, positioned halfway between the points)
void buildVoronoi()
{
for (int i = 0; i < numPoints; i++)
{
// each Voronoi cell starts as the entire container
voronoiCells [i] = container.get();
}
for (int i = 0; i < numPoints; i++)
{
for (int j = 0; j < numPoints; j++)
{
if (i != j)
{
PVector N = PVector.sub(points [j], points [i]); // plane normal=normalized vector pinting from point i to point j
N.normalize();
PVector O = PVector.add(points [j], points [i]); // plane origin=point halfway between point i and point j
O.mult(0.5f);
O.x += N.x * offset_size;
O.y += N.y * offset_size;
O.z += N.z * offset_size;
P = new Plane(O, N);
voronoiCells [i].cutMesh(P, points [i]);
}
}
}
for (int i = 0; i < numPoints; i++)
{
centers [i] = new PVector();
for (int j = 0; j < voronoiCells[i].vertices.Count; j++)
{
HE_Vertex v = (HE_Vertex)voronoiCells [i].vertices [j];
centers [i].add(v);
}
centers [i].div(voronoiCells [i].vertices.Count);
}
}