Editing Gouraud shading (section)

{{short description|Interpolation method in computer graphics}}
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{{3D computer graphics}}

[[File:Gouraudshading00.png|thumb|300px|Gouraud-shaded triangle mesh using the [[Phong reflection model]]]]
'''Gouraud shading''' ({{IPAc-en|ɡ|uː|ˈ|r|oʊ}} {{respell|goo|ROH}}), named after [[Henri Gouraud (computer scientist)|Henri Gouraud]], is an [[interpolation]] method used in [[computer graphics]] to produce continuous [[shading]] of surfaces represented by [[Polygon mesh|polygon meshes]]. In practice, Gouraud shading is most often used to achieve continuous lighting on [[triangle mesh]]es by computing the lighting at the corners of each triangle and [[Linear interpolation|linearly interpolating]] the resulting colours for each [[pixel]] covered by the triangle. Gouraud first published the technique in 1971.<ref name="thesis">{{cite thesis|last=Gouraud|first=Henri|title=Computer Display of Curved Surfaces, Doctoral Thesis|year=1971|publisher=University of Utah |url=http://content.lib.utah.edu/cdm/ref/collection/uspace/id/4477}}</ref><ref>{{cite journal|last=Gouraud|first=Henri|title=Continuous shading of curved surfaces|journal=IEEE Transactions on Computers|year=1971|volume=C-20|issue=6|pages=623–629|doi=10.1109/T-C.1971.223313|s2cid=123827991 |url=http://page.mi.fu-berlin.de/block/htw-lehre/wise2012_2013/bel_und_rend/skripte/gouraud1971.pdf}}</ref><ref>{{cite book|last=Gouraud|first=Henri|title=Seminal Graphics: Pioneering efforts that shaped the field|year=1998|publisher=ACM Press|isbn=1-58113-052-X|editor=Rosalee Wolfe|chapter=Continuous shading of curved surfaces|url=https://archive.org/details/seminalgraphicsp00wolf|url-access=registration}}</ref> However, enhanced hardware support for superior shading models has yielded Gouraud shading largely obsolete in modern rendering.