void gleHelicoid (gleDouble rToroid,
gleDouble up[3],
gleDouble startRadius,
gleDouble drdTheta,
gleDouble startZ,
gleDouble dzdTheta,
gleDouble startXform[2][3],
gleDouble dXformdTheta[2][3],
gleDouble startTheta,
gleDouble sweepTheta);
Generalized Torus. Similar to gleSpiral, except contour is a circle. Uses gleSpiral to draw.