I want to be able to define cones through the iGeom interface. (Tim and I have discussed this already, and agreed that such an extension to iGeom would be straightforward.) Attached to this email is a patch that implements an iGeom_createCone function, with an interface derived from createCylinder. Indeed, the new function is almost identical to createCylinder. If we want to avoid adding more functions to iGeom, it would be possible to simply extend the createCylinder function to accept one more argument, thus giving it the capacity to define cones as well as cylinders. But perhaps it is better to leave the existing cylinder interface as it is, and add a new cone function like the one I've attached. If the attached patch meets the approval of the lead developers, I'd ask one of them to apply it to the repository. Thanks. (By the way, it seems like the svn repository may have gone down this afternoon; I'm currently unable to contact it.) ~S