Abstract: Method for describing a thread as a geometric object in a three dimensional computer graphics system. The method comprises generating a set of fixture points defining points in space through which the thread passes, generating a set of one or more segments representing the thread between adjacent fixture points, linking each segment to a pair of fixture points, one at each end of the respective segment, and describing the geometrical properties of each segment. The segments and fixture points are preferably defined as objects containing functions and variables allowing the exchange of data between the various objects. The method allows for the calculation of the shape of the thread based on a calculation of the shape of each individual segment.

Abstract: The invention is related to a kit for use in a surgical simulation system which comprises an operating element adapted for insertion of haptic devices and or surgical instruments/devices, at least one haptic device, at least one motion tracking sensor(s) connected to the haptic device(s), and signal transmission means for transmitting sensor signals to the simulation system. The invention further regards an operating element and a haptic device for use in a surgical simulation system.

Abstract: The present invention relates to a method for creating an irregular mesh description and an embedded geometric description in a computer graphics system. The method comprises steps of receiving topological input data representing vertices and faces of the mesh, creating a G-map representation of the topology of said mesh based on said input data, associating coordinates in space with the vertices of said mesh, and creating a smooth geometric description from said mesh and said coordinates. The invention also includes a computer system capable of performing the method, as well as computer program product that, when installed on a computer system, enables such a system to perform the invention.

Abstract: Method for describing a thread as a geometric object in a three dimensional computer graphics system. The method comprises generating a set of fixture points defining points in space through which the thread passes, generating a set of one or more segments representing the thread between adjacent fixture points, linking each segment to a pair of fixture points, one at each end of the respective segment, and describing the geometrical properties of each segment. The segments and fixture points are preferably defined as objects containing functions and variables allowing the exchange of data between the various objects. The method allows for the calculation of the shape of the thread based on a calculation of the shape of each individual segment.