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Practical Ray Tracing of Trimmed NURBS Surfaces
https://www.cs.utah.edu/gdc/publications/papers/raynurbs.pdf
A system is presented for ray tracing trimmed NURBS surfaces. While approaches to components are drawn largely from existing literature, their combination within a single framework is novel. This paper also differs from prior work in that the details of an efficient implementation are fleshed out. Throughout, emphasis is placed on practical ...
(PDF) Ray tracing of optical systems using NURBS surfaces
https://www.researchgate.net/publication/230965186_Ray_tracing_of_optical_systems_using_NURBS_surfaces
Ray tracing of optical systems using. NURBS surfaces. Davide Bianchi, Manuel Sánchez del Río and Claudio Ferr ero. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cede x ...
(PDF) Direct and fast ray tracing of NURBS surfaces
https://www.researchgate.net/publication/232644373_Direct_and_fast_ray_tracing_of_NURBS_surfaces
To find the intersection. of a surface S ( u, v) and a ray, we ha ve to find the roots of. R ( u, v) = N 1 S ( u, v) + d 1. N 2 S ( u, v) + d 2 (4) R becoming zero indicates that the distance of ...
KeyShot 5: NURBS Raytracing - YouTube
https://www.youtube.com/watch?v=iZmrTkC-8ac
NURBS data import from your favorite modeling system delivers accurate geometry with smoother edges. NURBS import is currently available for all geometry for...
Fast ray tracing NURBS surfaces | SpringerLink
https://link.springer.com/article/10.1007/BF02943518
Also, a ray is defined to be the intersection of two planes, which are non-orthogonal in general, in such a way that the number of multiplication operations is reduced. In the preprocessing step, NURBS surfaces are subdivided adaptively into rational Bézier patches. Parallelepipeds are used to enclose the respective patches as tightly as possible.
Fast ray tracing NURBS surfaces | Semantic Scholar
https://www.semanticscholar.org/paper/Fast-ray-tracing-NURBS-surfaces-Qin-Gong/7f9b8d1fee24c8d0f9b0a1abc140ad3d1aa16a8f
Also, a ray is defined to be the intersection of two planes, which are non-orthogonal in general, in such a way that the number of multiplication operations is reduced. In the preprocessing step, NURBS surfaces are subdivided adaptively into rational Bézier patches. ... The method may also be used to speed up tracing the intersection of two ...
A new method for speeding up ray tracing NURBS …
https://www.sciencedirect.com/science/article/pii/S0097849397872639
Example 2. Ray tracing NURBS surfaces. We tested the new method for ray tracing NURBS surfaces on an IBM PC(Pentium 75) and created Figs 4-6 at 640x480 resolution. The sphere in Fig. 6 is represented using NURBS [31]. In Fig. 4 the teapot's scene, whose size is 432x432x 12(,, is divided into 42x42x l4 3-D cells.
NURBS - BRL-CAD
https://brlcad.org/wiki/NURBS
Beginning with release 7.26.0, NURBS are considered viable for production users of BRL-CAD needing import, ray tracing support, and editing via implicit CSG operations. BRL-CAD does not yet offer complete support for NURBS. There are many features pertinent when referring to implementing NURBS that are important to some users and not others.
raytracing - How to raytrace Bezier surfaces? - Computer ...
https://computergraphics.stackexchange.com/questions/374/how-to-raytrace-bezier-surfaces
If you really want to do analytical (algebraic) ray-tracing of curvaceous shapes, ... Splines and patches come in many forms. heavensine beind simplest, bezier being simple, nurbs being overly complex. The more constrains yo add to your spline, the simpler it gets. NURBS is extension overkill; - its Non-Uniform-ness of weights (the "NU ...
Efficient Ray Tracing of Trimmed NURBS Surfaces
https://dcgi.fel.cvut.cz/home/havran/ARTICLES/EfremovMasterThesis.pdf
for direct ray tracing trimmed NURBS surfaces. In order to be able to study the topic efficiently, a library for NURBS evaluation has been implemented. The library is supposed to be easily integrated in any ray tracing application to make it support …
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