TrivialConnectionViewer.cs

using System.Collections.Generic;
using UnityEngine;
using Random = UnityEngine.Random;

namespace VectorField {
    public class TrivialConnectionViewer : MonoBehaviour {
        [SerializeField] protected List<float> singularities;
        private List<List<HalfEdge>> genes;
        private HomologyGenerator hg;
        private HeGeom G;

        void Start() {
            var c = GetComponent<GeomContainer>();
            G = c.geom;
            hg = new HomologyGenerator(G);
            genes = hg.BuildGenerators();
            var b = new float[G.nVerts];
            foreach (var s in singularities) {
                var i = Random.Range(0, G.nVerts); 
                b[i] = s;
                if (s != 0) c.PutSingularityPoint(i);
            }
            
            var t = new TrivialConnectionHD(G);
            var p = t.ComputeConnections(b);
            var f = t.GetFaceVectorFromConnection(p);
            
            c.BuildFaceArrowBuffer(f);
            c.surfMode = GeomContainer.SurfMode.blackBase;
            c.showFaceArrow = true;
            c.showVertArrow = false;
        }

        /*
        // Homology generator viewer
        [SerializeField] protected Material mat;
        void OnRenderObject() {
            if (genes == null) return;
            GL.PushMatrix();
            mat.SetPass(0);
            GL.Begin(GL.LINES);
            foreach (var g in genes) {
                foreach (var h in g)
                {
                    var c1 = G.Centroid(h.face);
                    var c2 = G.Centroid(h.twin.face);
                    var p1 = G.Pos[h.vid];
                    var p2 = G.Pos[h.twin.vid];
                    var m = (p1 + p2) * 0.5f; 
                    GL.Vertex(c1);
                    GL.Vertex(m);
                    GL.Vertex(m);
                    GL.Vertex(c2);
                }
            }
            GL.End();
            GL.PopMatrix();
        }
        */
    }
}