MATLAB SIMULINK 3D ANIMATION - S Guide de l'utilisateur Page 444

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10 Functions — Alphabetical List
10-104
vrrotvec2mat
Convert rotation from axis-angle to matrix representation
Syntax
m = vrrotvec2mat(r)
m = vrrotvec2mat(r,options)
Description
m = vrrotvec2mat(r) returns a matrix representation of the rotation defined by the
axis-angle rotation vector, r.
m = vrrotvec2mat(r,options) returns a matrix representation of rotation defined
by the axis-angle rotation vector r, with the default algorithm parameters replaced by
values defined in options.
The options structure contains the parameter epsilon that represents the value below
which a number will be treated as zero (default value is 1e-12).
The rotation vector, r, is a row vector of four elements, where the first three elements
specify the rotation axis, and the last element defines the angle.
To rotate a column vector of three elements, multiply it by the rotation matrix. To rotate
a row vector of three elements, multiply it by the transposed rotation matrix.
See Also
vrrotvec | vrrotmat2vec
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