Jack (geometry)
In geometry, a jack is a 3D cross shape, typically consisting of three orthogonal ellipsoids.[1]
In some contexts additional details like are added to more closely resemble a playing piece from the game of jacks.[2][3] For example four small spheres are often added to the ends of two ellipsoids.
In the demoscene, the Shadertoy community, and other computer graphics related fields, a jack is used as a non-trivial visual object, simple enough to be created from basic primitives.
The 3D cross shape could also consist of cylinders, boxes or lines instead of ellipsoids.[4][5][6] Specifically in digital image processing the 6-connectivity can be referred to as jack.
See also[edit]
References[edit]
- ↑ Dharmin, Desai (2021). "Efficient optimization of R50% when planning multiple cranial metastases simultaneously in single isocenter SRS/SRT". Journal of Applied Clinical Medical Physics. JACMP. 22 (6): 71–82. doi:10.1002/acm2.13254. PMC 8200517 Check
|pmc=value (help). PMID 33960619 Check|pmid=value (help). - ↑ Jules, Bloomenthal (1994). "An Implicit Surface Polygonizer". Graphics Gems. Elsevier. pp. 324–349. doi:10.1016/B978-0-12-336156-1.50040-9. ISBN 9780123361561. Retrieved 9 July 2022. Unknown parameter
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- ↑ Adrian, Hilton (1997). "Marching Triangles Delaunay Implicit Surface". Retrieved 9 July 2022. Unknown parameter
|s2cid=ignored (help) - ↑ Matt, Petersen (2010). "Shear rheology of extended nanoparticles". Physical Review E. American Physical Society. 82 (1 Pt 1): 010201. Bibcode:2010PhRvE..82a0201P. doi:10.1103/PhysRevE.82.010201. PMID 20866552. Retrieved 9 July 2022.
- ↑ "Cubit Reference Manual". Retrieved 9 July 2022.
- ↑ Thomas, Nummy (2018). "Measurement of the atomic orbital composition of the near-fermi-level electronic states in the lanthanum monopnictides LaBi, LaSb, and LaAs". npj Quantum Materials. Nature. 3: 24. Bibcode:2018npjQM...3...24N. doi:10.1038/s41535-018-0094-3. Retrieved 9 July 2022. Unknown parameter
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