HELP creating 3D Delaunay about igeo HOT 2 OPEN

If you are talking about IDelaunay.getTetrahedron(IVec[]), it returns an array of 4 points which represents each tetrahedron-shaped cell as 4 vertices, and you'd build lines, surfaces or meshes out of them if you want. Below is an example. It'd be heavy to run delaunay with many points because of its 5D loop but I don't know why it'd make it slower after finishing it unless you make lots of geometries along it.

import igeo.*;
size(800,600,IG.GL);
IVec[] pts = new IVec[100];
for(int i=0; i<pts.length; i++){ pts[i] = IRand.pt(100); }
IVec[][] vtx = IDelaunay.getTetrahedron(pts);
for(int i=0; i<vtx.length; i++){
IColor c = IRand.clr();
new ISurface(vtx[i][0],vtx[i][1],vtx[i][2]).clr(c);
new ISurface(vtx[i][0],vtx[i][1],vtx[i][3]).clr(c);
new ISurface(vtx[i][0],vtx[i][2],vtx[i][3]).clr(c);
new ISurface(vtx[i][1],vtx[i][2],vtx[i][3]).clr(c);
}

from igeo.

Thank you for your kind reply.
Could you elaborate on other two components, and their use in creating delaunay triangulation. To be more specific, I am trying to triangulate a surface, which has a number on points on it.

from igeo.