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#### 7.2.138 transform-incr

`(transform-incr objectID centerID frameID [rotate|translate|translate-scaled|scale] x y z [origin|bbox-center] [dt [smooth]])`
  Apply continuing motion: construct a transformation matrix and concatenate it with the current transform of objectID every refresh (sets objectID's incremental transform). Same syntax as transform. If optional `dt` argument is present, the object is moved at each time step such that its average motion equals one instance of the motion per `dt` seconds. E.g. (transform-incr World World World rotate 6.28318 0 0 10.0) rotates the World about its X axis at 1 turn (2pi radians) per 10 seconds.