// double h = Math.abs(last.getBulge()) * l / 2;
double r = this.getRadius(start.getBulge(), l);
double s = l / 2;
Vector edgeDirection = MathUtils.getVector(start.getPoint(),
end.getPoint());
edgeDirection = MathUtils.normalize(edgeDirection);
Point centerPoint = MathUtils.getPointOfStraightLine(start.getPoint(),
edgeDirection, s);
Vector centerPointDirection = MathUtils.crossProduct(edgeDirection,
this.getExtrusion().getNormal());
centerPointDirection = MathUtils.normalize(centerPointDirection);
// double t = Math.sqrt(Math.pow(r, 2) - Math.pow(s, 2));
// double t = 0;