# surface normal

(redirected from Normal vector)

## 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 ?
In fact, such an equivalent measure can be derived as the unit normal vector of the hyperplane that separates the attainable gain subspace and the convex cone representing arbitrage opportunities.
The orientation and position of the normal vector of punctual coordinates M are defined from the transition matrix calculated with respect to the robot frame:
To move 90 tonnes to Haiti, which is pretty far outside our normal vector, is a good thing and is a mark of what Sheikh Mohammed has created," she explained, adding,
10-a, the proposed system calculates the normal vector [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] to the palm from the function of Leap motion when the time is t-1.
We recall that a submanifold a is said to be austere if, for any normal vector field v, the corresponding curvatures, i.
where n represents the continuous outer normal vector to the domain's boundary surface [partial derivative][OMEGA].
M] be a unit spacelike normal vector to S defined in some open neighborhood of corresponding H.
By the analysis of eigenvalues and associated eigenvectors of the moment tensor it is possible to classify the crack (failure mode), and obtain the crack motion vector (l) and the crack normal vector (n) [11].
z] are Cartesian components of unit normal vector, P is static pressure, H is total enthalpy, and [V.
3) are the coordinates of the normal vector and equal to the determinants of square matrices:
The normal vector to the plane can be obtained by the vector cross product of [V.

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