earthquake effect on 3d world

[keogan]

Hey there,
I know I am becoming a plague but I have so many questions. This learning
curve is bloody steep. Anyway, just wondering if anybody out there have ever
put any effects on a 3d world member. I would like some kind of shudder/ripple
effect everytime I hit the base drum. Anybody got suggestions?
A

[tedalde2]

Put a little random decaying noise on your objects (or, better yet, your
camera). At a frequent interval, like stepframe, or on a 30ms timeout:

(pCount would be a global or property that increments every interval)

pCount = pCount + 1 -- increment this every time interval
vNoiseVector = randomVector() / pCount -- returns a random vector that gets
smaller with time
vNoiseVector = vNoiseVector * vSomeScalingFactor -- scale this very small
vector up to a size that can be used in your scene
-- set your object/camera position
yourObjectReference.translate(vNoiseVector)

You might want to get the position of the object (pInitialPosition) before
doing this, and adjust against that postion every time. So, instead of
translate, use:
yourObjectReference.transform.position = pInitialPosition + vNoiseVector

also you may want to power() pCount to get a faster decay.

Just a thought. Didn't try it myself.