Difference between revisions of "X3D NURBS"
(Kamburelis is Michalis - expand his name -and PLEASE EXTERMINATE THESE VANDALS WHICH I BLANK CONSTANTLY) |
Vmarchetti (Talk | contribs) |
||
| Line 8: | Line 8: | ||
Michalis Kamburelis has summarized the use of [http://castle-engine.sourceforge.net/x3d_implementation_nurbs.php#section_homogeneous_coordinates weights and control points] in X3D. Note that the X3D terminology is different from the terminology used in the STEP standard. As specified in Part 42 of the STEP (ISO 10303) the "control points" attribute of a b-spline (including nurbs) entity contains the coordinates a point in real, not homegeneous, space. See the standards document ISO 10303-42:1998(E) section 4.4.70 | Michalis Kamburelis has summarized the use of [http://castle-engine.sourceforge.net/x3d_implementation_nurbs.php#section_homogeneous_coordinates weights and control points] in X3D. Note that the X3D terminology is different from the terminology used in the STEP standard. As specified in Part 42 of the STEP (ISO 10303) the "control points" attribute of a b-spline (including nurbs) entity contains the coordinates a point in real, not homegeneous, space. See the standards document ISO 10303-42:1998(E) section 4.4.70 | ||
| + | |||
| + | [http://www.web3d.org/x3d/wiki/images/1/17/X3D_Browser_NURBS_Evaluation.pdf X3D Browser Evaluation] PDF, Oct 2012: A summary of the state of X3D browsers' rendering of NurbsPatchSurface and NurbsTrimmedSurface nodes. | ||
Revision as of 16:23, 28 October 2012
These are references useful for implementors and users of the NURBS component.
A standard reference for NURBS curves and surfaces is: L Peigl and W Tiller, The NURBS Book, Springer-Verlag 2nd Ed. 1997
NURBS example X3D models
- NURBS Patch Surface demonstration scenes and explanations for implementations by Vincent Marchetti
- NURBS Trimmed Surface Examples of NurbsTrimmedSurface node with internal trimming curves by Vincent Marchetti
Michalis Kamburelis has summarized the use of weights and control points in X3D. Note that the X3D terminology is different from the terminology used in the STEP standard. As specified in Part 42 of the STEP (ISO 10303) the "control points" attribute of a b-spline (including nurbs) entity contains the coordinates a point in real, not homegeneous, space. See the standards document ISO 10303-42:1998(E) section 4.4.70
X3D Browser Evaluation PDF, Oct 2012: A summary of the state of X3D browsers' rendering of NurbsPatchSurface and NurbsTrimmedSurface nodes.
