- (differential geometry) A unit vector at any given point
*P*of a surface*M*which is perpendicular to the tangent plane*T*of_{P}(M)*M*at*P*. For a surface with parametrization , it is given by

- where the sign can be chosen at will.

Noun

- (differential geometry) A unit vector at any given point
*P*of a surface*M*which is perpendicular to the tangent plane*T*of_{P}(M)*M*at*P*. For a surface with parametrization , it is given by

- where the sign can be chosen at will.

English Wiktionary. Available under CC-BY-SA license.

Link to this page

Cite this page

**MLA Style**

"Surface-normal." *YourDictionary*. LoveToKnow. www.yourdictionary.com/surface-normal.

**APA Style**

Surface-normal. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/surface-normal

In 3D graphics, an imaginary line that is perpendicular to the surface of a polygon. It may be computed at the vertex of a triangle, in which case it is the average of all the vertices of adjoining triangles. Or, it may be computed for each pixel in the triangle as in Phong shading. Surface normals are used to derive the reflectivity of a light source shining onto an object. See tessellation, triangle, Phong shading and Gouraud shading.

Computer Desktop Encyclopedia THIS DEFINITION IS FOR PERSONAL USE ONLY All other reproduction is strictly prohibited without permission from the publisher. © 1981-2017 The Computer Language Company Inc. All rights reserved.

Link to this page

Cite this page

**MLA Style**

"Surface-normal." *YourDictionary*. LoveToKnow. www.yourdictionary.com/surface-normal.

**APA Style**

Surface-normal. (n.d.). In *YourDictionary*. Retrieved from https://www.yourdictionary.com/surface-normal