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Derive hidden corner pin point from other three
I’m wondering if there is a way to calculate where one corner of the corner pin effect should be based off the position of the other three (given an initial starting point). I have a screen replacement where three of the points are visible, and can track individually and bind to nulls. However the fourth remains off screen. Might anyone be aware of a solution? I would try the parallel corner pin tracker, but it wont allow me to pull the fourth point off-canvas.
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1 Reply
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If things are simple enough (that is: if the screen rectangle still appears as a parallelogram), you can use this for the Lower Right corner:
A = effect("Corner Pin")("Upper Left");
B = effect("Corner Pin")("Upper Right");
C = effect("Corner Pin")("Lower Left");
B+C-A;(Similar expressions for other cases, eg Upper Left msssing, etc : permute names).
Xavier
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