79 results about "Subdivision surface" patented technology

Deformations are applied to a model using a subdivision surface. Given a wrap and model, a subdivision surface is calculated from the wrap. The model is then bound to the subdivision surface. When the wrap is deformed, the subdivision surface is recalculated. The model is then deformed based on changes in the subdivision surface. Binding parameters may be assigned to control vertices in the wrap to control the application of the deformation to the surface.

The invention discloses a network address design method and a data resource scheduling method based on geographic SOT (GeoSOT) subdivision codes, and belongs to the field of geographic space information organizations, geographic information systems and computer networks. The network address design method comprises the steps of obtaining a binary system one-dimensional GeoSOT code containing the smallest GeoSOT subdivision surface patch of a geographic range of user host machine management data resources, obtaining a 64-bit host machine code, enabling a hierarchy where the subdivision surface patch is located to be converted to be a 5-bit binary system code, obtaining a subdivision hierarchy code, combining the subdivision hierarchy code and the host machine code to be a geographic internet protocol (GeoIP) code which serves as rear 69 bits in an internet protocol version 6 (IPv6) address, obtaining a GeoIP address, conducting subnet division on the GeoIP address, and setting a subnet mask. The data resource scheduling method comprises the steps of designing a GeoIP address of a user host machine, confirming a GeoIP address of a receiving host machine by a sending host machine according to the geographic space range which the obtained data relate to, packaging the data and the GeoIP address of the receiving host machine to be a GeoIP data packet, and transmitting the GeoIP data packet to the receiving host machine. The network address design method and the data resource scheduling method based on GeoSOT subdivision codes are applicable to space-time organizations of network space data resources.

Disclosed is an improved computer system, method, and program product that has one or more input devices for receiving one or more input meshes representing a three dimensional model. The three dimensional model is capable of being represented as a 2-manifold triangular mesh. A conversion process automatically converts the input mesh to a multiresolution quadrilateral-based subdivision surface (MQSS) representation.

An initial polygon obtained from a point group is used as a control polygon, and a control point of the control polygon is offset in a normal direction by the shortest distance from a limit surface generated by the control polygon, so that the position of new control point is determined to allow a subdivision surface to interpolate the initial polygon, thereby generating the subdivision surface which interpolates the point group. A first process to determine the point on the subdivision surface at the shortest distance from each control point, and a second process to move and offset the control point in the normal direction from the surface by the distance between the point on the surface and the initial control point, are iterated until the distance between the initial point group and the point on the surface satisfies the threshold or becomes smaller than the threshold, thereby generating the subdivision surface interpolating the initial polygon. Consequently, the subdivision surface interpolating the point group is generated within a short operation time period, without solving a linear system.

It is provided a computer-implemented method for designing a 3D modeled object. The method comprises providing a base mesh controlling a subdivision surface. The subdivision surface models the 3D modeled object. The method also comprises providing a polyline consisting of connected edges of the base mesh and defining a smooth portion of the polyline comprising an extremity of the polyline and a sharp portion of the polyline upstream the smooth portion. The method also comprises converting faces of the mesh adjacent to the polyline into parametric patches approximating the subdivision surface. The patches have a G0 connection across the sharp portion of the polyline, and the patches have a Gi connection across the smooth portion of the polyline, where i is an integer higher or equal to 1.Such a method improves the design of a 3D modeled object modeled by a subdivision surface.

The invention discloses an electrical property evaluation method and device for a radome. The electrical property evaluation method for the radome comprises the following steps that: according to measurement, obtaining antenna radiation near region electric field information, and calculating the caliber surface electric field information of the antenna according to the near region electric field information; obtaining the model data information of the radome, and obtaining the subdivision surface meta-information of the radome according to the model data information of the radome; according tothe caliber surface electric field information of the antenna and the subdivision surface meta-information of the radome, calculating the far field information of the antenna and the far field information of an antenna system; and according to the far field information of the antenna and the far field information of an antenna system, calculating the electrical property parameter information of the radome. The radiation near region electric field information of the antenna is practically measured to obtain the caliber surface electric field information of the antenna so as to obtain the performance parameter information of the radome, calculation accuracy is guaranteed under a situation that antenna digital-to-analogue input is not depended, and the maneuverability of the electrical property evaluation of the antenna system of ''antenna+radome'' can be greatly improved.

A method, computer readable storage, and apparatus for improving subdivision schemes for subdivision surfaces. The present method can correct distortion from the base mesh caused by prior art subdivision and smoothing schemes. In one embodiment, the method includes: (a) subdividing a curve having original vertices producing additional vertices; (b) smoothing the curve into smoothed vertices comprising smoothed original vertices and smoothed additional vertices; and (c) adjusting positions of the smoothed vertices.

An apparatus and method are described for ray tracing. In particular, one embodiment of an apparatus for ray tracing comprises: feature adaptive subdivision logic to analyze faces on a subdivision surface and to responsively identify the faces as being of a first type or a second type, the feature adaptive subdivision logic to employ a first set of processing techniques to faces of the first type to generate a first patch type and to employ a second set of processing techniques to faces of the second type to generate a second patch type; and ray intersection determination logic to determine an intersection point between a ray and each of the patches of the first patch type and the second patch type.

Methods and techniques are provided for procedurally editing hierarchical subdivision surfaces. A procedure set and a parameter set may be received. The procedure set may include one or more produces for generating detail coefficients. The parameter set may include one or more parameters, such as granularity and sharpness, while further specifying deltas or other jitter in parameter values or locations. A hierarchical subdivision surface description can be generated based on a mesh, the procedure set, and the parameter set.

The present invention belongs to the scientific computing visualization field and relates to a GPU-based interactive three-dimensional flow field adaptive resolution dynamic visualization algorithm. According to the algorithm, seed points are evenly placed in a view-frustum; a part of seed points which are scattered outside a data range are moved into the data range according to the near plane andfar plane texture of a pre-rendered data body; probability density spheres are generated, and are rendered into probability density bodies, so that the particles can be evenly distributed in motion;and a GPU-accelerated rendering technology is used to generate a streamline, and the Tessellation subdivision surface technology is used to expand the streamline into a pipeline, and therefore, the adaptive resolution dynamic visualization drawing of a three-dimensional flow field can be realized.