[Dan Ebberts]

Looking forward to it!

Dan

[Dan Ebberts]

Could be considerable if your comp is long.

Dan

[Dan Ebberts]

t += thisComp.frameDuration

gives the same result as:

t = t + thisComp.frameDuration

there are also -=, *=, and /= operators

Dan

[Dan Ebberts]

I don’t think there’s any way short of looping through all the frames. I think I’d apply an expression like this to a slider: (didn’t test this – there may be typos)

C = thisComp.layer(“Camera 1”);
L = thisComp.layer(“Light 1”);
maxDist = 0;
for (t =0; t <= outPoint; t += thisComp.frameDuration){ maxDist = Math.max(maxDist, length (C.position.valueAtTime(t), L.position.valueAtTime(t))); } maxDist Then convert the expression to keyframes so it doesn't have to calculate every frame. Dan

[Dan Ebberts]

Ah, OK – play around with this for the position of the reflected camera:

c = thisComp.layer(“Camera 1”);
p = thisComp.layer(“reflecting plane”);
myPos = p.fromWorld(c.toWorld([0,0,0]));
p.toWorld([myPos[0],myPos[1],-myPos[2]])

Dan

[Dan Ebberts]

OK – I think i get it now. Couldn’t you just convert the camera’s position into the plane’s layer space, put the other camera at the same positon except for z, which would be the opposite value, and then do the same thing for the point of interest?

Or do I really still not get it? 🙂

Dan

[Dan Ebberts]

Sounds interesting, but I’m having trouble picturing what you’re trying to do. What exactly do you mean by “reflect a camera across a 3D plane”?

Dan

[Dan Ebberts]

Try it this way:

thisComp.layer(“particle follow”).transform.position.valueAtTime(0)[2]

Dan

[Dan Ebberts]

The only thing I can think of would be to do it this way:

L = thisComp.layer(“Master Layer”);
L.position.valueAtTime(L.inPoint)

Dan

[Dan Ebberts]

This should do it:

thisComp.layer(“other layer”).transform.position.valueAtTime(0)

Dan