nurbs


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By rotating and linearly clipping the domain, each group can be represented as one linearly trimmed, bicubic, tensor-product NURBS patch.
With this release, Freeform becomes the only system to give product designers the freedom and flexibility to combine up to four different modeling approaches - voxels, subdivision surfaces, polygons and NURBS (Geomagic Freeform Plus only) - in the same manufacturable model.
This has made possible a fast spreading of the IGM, but also limited it to quadratic or cubic NURBS in complex simulations.
El metodo utiliza el algoritmo ICP (Iterative Closest Point), el cual solo requiere encontrar el punto sobre la superficie NURBS mas cercano al punto 3D.
Until now, robust NURBS modeling technology like this has been available only in UNIX workstation software costing thousands of dollars.
Freeform is unique in its ability to model in polygons, voxels, and NURBS surfaces and solids, allowing the designer to retain original design integrity.
The ability to create and manipulate multiple geometry types--voxels/digital clay, NURBS, and mesh--within one familiar environment.
The programs employ NURBS (non-uniform rational B-spline), a mathematical representation of 3-D geometry common in computer graphics for generating models of complex objects.
Other topics include an active contour model for selective segmentation, attributed graph visualization of collaborative workspaces, detecting microcalcification clusters in digital mammograms, perspective correct normal vectors for Phong shading, and ship hull fitting using NURBS.
The system also boasts a special high-speed software package that consists of a 64-bit RISC processor, state-of-the-art Fanuc High Precision Contour Control (HPCC) software with full alphanumeric keyboard, high-speed rigid tapping, data server, network capable through Ethernet connection, and NURBS interpolation.
Also, this version offers the capability of removing points from a NURBS edge or surface.
The system, based on NURBS (Non-Uniform Rational B-Splines), displays real-time object slicing on a Unix computer, 3D Modeler connects to standard RS-232 ports and is driven by standard NC code.