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expression evaluator in action with transition
The time range was also set from 0.0 to 0.97 to avoid a skip where the circle goes from 2*pi radians back to 0 which are, functionally, exactly alike.
Note that "scale to transition" was also selected, this scaled the source image so that instead of a "moving window" effect, the the whole picture is rotating
To build the transition, consider a parametric circle.
Y = sin(t)
X = cos(t)
where t goes from 0 to 2*pi
From this we build into a simple Transition Control File:
This result is the fractional part of 2*pi radians completed, therefore, it will trace 1 whole circle over the course of time (from 0 to 1)
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WinImages F/x Manual Version 7, Revision 5, Level B |