3D human–computer interaction: Difference between revisions

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To avoid this limit, there are many techniques that have been suggested, like the Go-Go technique.<ref>{{cite book | last1=Poupyrev | first1=Ivan | last2=Billinghurst | first2=Mark | last3=Weghorst | first3=Suzanne | last4=Ichikawa | first4=Tadao | title=The go-go interaction technique: non-linear mapping for direct manipulation in VR | pages=79–80 | website=ACM Digital Library | doi=10.1145/237091.237102 | chapter-url=http://www.ivanpoupyrev.com/e-library/1998_1996/uist96.pdf | access-date=2018-05-18| chapter=The go-go interaction technique | year=1996 | isbn=978-0897917988 | s2cid=1098140 }}</ref> This technique allows the user to extend the reach-area using a non-linear mapping of the hand: when the user extends the hand beyond a fixed threshold distance, the mapping becomes non-linear and the hand grows.

Another technique to select and manipulate objects in 3D virtual spaces consists in pointing at objects using a virtual-ray emanating from the virtual hand.<ref>{{cite techreporttech report |first=Mark R.|last=Mine |title=Virtual Environment Interaction Techniques |institution=Department of Computer Science University of North Carolina |date= 1995 | url=http://www.cs.unc.edu/techreports/95-018.pdf}}</ref> When the ray intersects with the objects, it can be manipulated. Several variations of this technique has been made, like the aperture technique, which uses a conic pointer addressed for the user's eyes, estimated from the head ___location, to select distant objects. This technique also uses a hand sensor to adjust the conic pointer size.

Many other techniques, relying on different input strategies, have also been developed.<ref>{{cite journal | last1=Argelaguet | first1=Ferran | last2=Andujar | first2=Carlos | s2cid=8565854 | title=A survey of 3D object selection techniques for virtual environments | journal=Computers & Graphics | volume=37 | issue=3 | year=2013 | issn=0097-8493 | doi=10.1016/j.cag.2012.12.003 | pages=121–136 | url=https://hal.archives-ouvertes.fr/hal-00907787/file/Manuscript.pdf }}</ref><ref>{{cite journal | last1=Besançon | first1=Lonni | last2=Sereno | first2=Mickael | last3=Yu | first3=Lingyun | last4=Ammi | first4=Mehdi | last5=Isenberg | first5=Tobias | title=Hybrid Touch/Tangible Spatial 3D Data Selection | journal=Computer Graphics Forum | publisher=Wiley | volume=38 | issue=3 | year=2019 | issn=0167-7055 | doi=10.1111/cgf.13710 | pages=553–567 | s2cid=199019072 | url=https://hal.inria.fr/hal-02079308/file/Besancon_2019_HTT.pdf }}</ref>