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Convert viewpoint direction to orientation




vrdir2ori(d) converts the viewpoint direction, specified by a vector of three elements, to an appropriate orientation (virtual world rotation vector).

vrdir2ori(d,options) converts the viewpoint direction 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).

Introduced in R2007b

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