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Using a 0-100 slider to keyframe from one position to another
I’m doing a lot of comps where a map starts out from some wide point (which we’ll call point A) and zooms into a different point (we’ll call point B). The spatial animation from point A to point B is a straight line, but the timing needs to be keyframed as it’s not a simple linear or ease timing.
I’d love to be able to input the x,y coordinates of Point A and Point B using 2 Point Selectors, and then use a slider control to keyframe the timing of going from Point A to Point B, from 0 (Point A’s position) to 100 (Point B’s position).
Is this possible?
(As a side note, I was also thinking of something like this if I wanted to manually control the “strength” of a parent’s influence on its child, where 100 means the child follows the parent’s position perfectly, 0 means it doesn’t follow it at all, and 50 means it only follows at 50% strength)
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2 Replies
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I figured it out:
Two Point Controllers: Point A (x,y) and Point B (x,y)
One Slider Control from 0-100
Camera null with separate dimensions.
On x position:
var ax = effect(“Point A”)(“Point”)[0]
var bx = effect(“Point B”)(“Point”)[0]ax-((ax-bx)*effect(“Slider Control”)(“Slider”)/100)
On y position:
var ay = effect(“Point A”)(“Point”)[1]
var by = effect(“Point B”)(“Point”)[1]
ay-((ay-by)*effect(“Slider Control”)(“Slider”)/100)Keyframing slider from 0-100 tweens the camera null from Point A to Point B, even if Point A and Point B move also.
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Instead of dividing the sliders by 100, I would suggest multiplying them by .01 like so:
…effect(“Slider Control”)(“Slider”)*.01
This will accomplish the same thing but won’t break if the slider is set to 0 (because its impossible to divide by zero).
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