surface normal

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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.
References in periodicals archive ?
Where y is an n-vector of traits (plumage coloration) for n individuals; W = ([w.
is the n-vector of P with respect to F (we usually omit F in the notation).
SAND Technology, SAND CDBMS, Nucleus, N-Vector, and MPSO are registered trademarks, and SAND/DNA, SAND/DNA Analytics, SAND/DNA aCRM, SAND Analytic Server, SAND Extensible Warehouse, and all related SAND-, SAND/DNA, and Nucleus-based marks and designs, are trademarks of SAND Technology Inc.
Now let x be a real n-vector, normalised so that [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] for any real matrix M.
SAND Technology, Nucleus, N-Vector, and MPSO are registered trademarks, and SAND/DNA, SAND/DNA Access, SAND/DNA Analytics, SAND/DNA aCRM, SAND Analytic Server, SAND Searchable Archive, SAND Extensible Warehouse, and all related SAND-, SAND/DNA, and Nucleus-based marks and designs, are trademarks of SAND Technology Inc.
Nucleus, Nucleus Server and N-Vector, are registered trademarks and Nucleus Exploration Mart, Nucleus Exploration Warehouse, Nucleus Virtual Database (VDB), Nucleus Powered
Nucleus, Nucleus Server and N-Vector, are registered trademarks and Nucleus Exploration Warehouse, Nucleus Virtual Database (VDB), Nucleus Powered
SAND Technology, SAND CDBMS, Nucleus, N-Vector, and MPSO are registered trademarks, and SAND/DNA, SAND/DNA Access, SAND/DNA Analytics, SAND/DNA aCRM, SAND Analytic Server, SAND Searchable Archive, SAND Extensible Warehouse, and all related SAND-, SAND/DNA, and Nucleus-based marks and designs, are trademarks of SAND Technology Inc.
Nucleus, Nucleus Server and N-Vector are registered trademarks and Nucleus Exploration Mart, Nucleus Exploration Warehouse, Nucleus Virtual Database (VDB), Nucleus Powered
Nucleus, Nucleus Server and N-Vector are registered trademarks of Sand Technology Systems International Inc.
Nucleus, N-Vector, Nucleus Server are registered trademarks of Sand Technology Systems International Inc.
Note to Editors: Nucleus, Nucleus Server and N-Vector are registered trademarks and Nucleus Exploration Mart, Nucleus Exploration Warehouse, Nucleus Virtual Database (VDB), Nucleus Powered