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Object collide with floor
Hi, I’m trying to figure it out an expression to make an object collide with a floor using sampleImage() perhaps, similar to this: https://www.motionscript.com/design-guide/collision.html except I want the object when touching the floor, it stops, something like clamp.
I don’t need it to simulate physics or something when rendering, I just need the object when touching the uneven floor, it stops.
Thanks.
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4 Replies
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It’s a little tricky. You’d need to use the time parameter of sampleImage() to find out when the object first touches the floor. You’d do that by starting at the time where contact is first possible (time = 0 maybe, or possibly one of the layer in points) and loop forward frame-by-frame until you find contact (or you get to the current time). Then you’d use that time to get the position to hold.
Fairly straightforward, but a bit of work.
Dan
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Hi Dan, do you think they have used this method here? https://youtu.be/vQxD8OOjh-I?t=7m24s
That’s what I am trying to achieve.Thanks.
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I don’t why, but the timecode came out wrong. Correct: 7:25
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No, it looks like they implemented a more efficient binary search to quickly zero in on the upper edge of the ground. It appears to be a much better approach than the one I outlined.
Dan
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