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Problem: Physical objects not being so physical |
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Senuka Harbinger
A-Life, one bit at a time
Join date: 24 Oct 2005
Posts: 491
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12-06-2005 20:08
Since I've begun playing with my A-Life fish, I've noticed that occasionally a few fish will act like they are phantom even though they are not: swimming through walls, other fish, etc. any clue why this is? I'm hypothesising (spelling?) that it's because sometimes they move at an extremely fast speed over a short period of time when escaping a predator since it only seems to happen when the fish is moving very fast.
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Ben Bacon
Registered User
Join date: 14 Jul 2005
Posts: 809
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12-06-2005 20:36
Your hypothesis might well be correct. Collisions are calculated during each physics-engine frame (45 fps IIRC).
If an object can move far enough in 1/45 seconds such that its bounding box was on one side of another object's box, but it is now completely on the other side - then that object can "quantum tunnel" through. From the physics engine's point of view, objects don't move from one place to another, they jump/snap/ripple through space - vanishing from here, and re-appearing velocity/(physics fps) units away. |