public void updateEdges() {
        edgeList.clear();
        int n = model.getN();
        int m = model.getM();
        int k = model.getK();

        double a = model.getA();
        double b = model.getB();
        double c = model.getC();
        double d = model.getD();

        Point3D[] lastPointsN = new Point3D[m + 1];
        for (int i = 0; i <= n; i++) {
            double delta = (double)i / n;
            double u = a * (1. - delta) + b * delta;

            Point3D lastPointM = null;
            for (int j = 0; j <= m * k; j++) {
                double dTheta = (double) j / (m * k);
                double v = c * (1. - dTheta) + d * dTheta;
                Point2D.Double p = spline.get(u);
                if (lastPointM == null) {
                    lastPointM = new Point3D(
                            p.getY() * Math.cos(v),
                            p.getY() * Math.sin(v),
                            p.getX()
                    );

                    if (j % k == 0) {
                        int index = j / k;
                        if (lastPointsN[index] == null) {
                            lastPointsN[index] = lastPointM;
                            continue;
                        }

                        edgeList.add(new Edge3D(lastPointsN[index], lastPointM));
                        lastPointsN[index] = lastPointM;
                    }

                    continue;
                }
                Point3D currentPoint = new Point3D(p.getY() * Math.cos(v),
                        p.getY() * Math.sin(v),
                        p.getX()
                );

                edgeList.add(new Edge3D(lastPointM, currentPoint));
                lastPointM = currentPoint;

                if (j % k == 0) {
                    int index = j / k;
                    if (lastPointsN[index] == null) {
                        lastPointsN[index] = currentPoint;
                        continue;
                    }

                    edgeList.add(new Edge3D(lastPointsN[index], currentPoint));
                    lastPointsN[index] = currentPoint;
                }
            }
        }
    }