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{{Short description|Term in computer science}}
{{About|collision detection in computational geometry|collision detection in computer networks|Carrier-sense multiple access with collision detection}}
{{redirect|Hitbox}}{{Multiple issues|{{Technical|section|date=March 2020}}
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'''Collision detection''' is the [[computational problem]] of detecting an [[Intersection (geometry)|intersection]] of two or more objects in virtual space. More precisely, it deals with the questions of ''if'', ''when'' and ''where'' two or more objects intersect. Collision detection is a classic problem of [[computational geometry]] with applications in [[computer graphics]], [[physical simulation]], [[Video game|video games,]] [[robotics]] (including [[autonomous driving]]) and [[computational physics]]. Collision detection [[algorithm]]s can be divided into operating on 2D or 3D spatial objects.<ref>{{cite journal|url=https://hal.inria.fr/inria-00394479/document|title=Collision Detection for Deformable Objects|year=2005|doi=10.1111/j.1467-8659.2005.00829.x|last1=Teschner|first1=M.|last2=Kimmerle|first2=S.|last3=Heidelberger|first3=B.|last4=Zachmann|first4=G.|last5=Raghupathi|first5=L.|last6=Fuhrmann|first6=A.|last7=Cani|first7=M.-P.|last8=Faure|first8=F.|last9=Magnenat-Thalmann|first9=N.|last10=Strasser|first10=W.|last11=Volino|first11=P.|journal=Computer Graphics Forum|volume=24|pages=61–81|s2cid=1359430|citeseerx=10.1.1.58.2505}}</ref>
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