[Dan Ebberts]

You can use an expression like this for the camera’s Focal Distance to make sure a (“target” in this case) is in the camera’s focal plane:

P = thisComp.layer(“target”).position;
dot(P – position,toWorldVec([0,0,1]))

Dan

[Dan Ebberts]

It’s pretty easy to do this with a script, but the script has to be customized for your comp names, text layer names and the format of your text file and any other requirements you have. This would be a good intro project if you wanted to learn scripting, or a small job if you wanted somebody to do it for you.

Dan

[Dan Ebberts]

I’m not sure exactly what you’re trying to do, but in general, if you want to transition from one expression to another for the same property, you can use linear() like this:

transStart = 4; //start transition at 4 seconds
transDur = 2; // transition duration

// undulation expression

xFreq = .3; //undulations per second
xSpeed = 150; //speed of wave (pixels per second)
damping = 15; //undulation damping factor

wl = xSpeed/xFreq; //wavelength (pixels)
phaseOffset = ((position[0]%wl)/wl)*2*Math.PI;
theta = Math.atan(Math.cos(2*Math.PI*xFreq*time + phaseOffset));
result1 = radiansToDegrees(theta)/damping;

// pendulum expression

veloc = 7;
amplitude = 80;
decay = .7;
result2 = amplitude*Math.sin(veloc*time)/Math.exp(decay*time);

// transition

linear(time,transStart, transStart + transDur,result1,result2)

Is that what you’re after?

Dan

[Dan Ebberts]

Nice work John, glad I could help!

Dan

[Dan Ebberts]

Fist question:

minAudio = 0;
maxAudio = 20;
minOpacity = 0;
maxOpacity = 100;
audioLevel = thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);

linear(audioLevel,minAudio,maxAudio,maxOpacity,minOpacity)

Second question:

Sure. Use time remapping (either keyframed or expression-driven).

Dan

[Dan Ebberts]

Hmmm… OK – I see.I guess it would depend on the effect. For glow you could set the Glow Intensity parameter to what you want and then apply this expression to that property to link it to your Check Box like this:

if(thisComp.layer(“Null 1”).effect(“Checkbox Control”)(“Checkbox”) == 1) value else 0

Dan

[Dan Ebberts]

Probably something like this:

-thisComp.layer(“Null 1”).rotation

Dan

[Dan Ebberts]

Aharon’s Expression Controls #2 tutorial (a little farther down the page) will show you exactly how to do this.

Dan

[Dan Ebberts]

This should do it:

w = thisComp.layer(“asphalt.psd2”).position.wiggle(6,10);
[w[0],value[1],w[2]]

Dan

[Dan Ebberts]

It might look something like this:

v = value;
for (i = 1; i <= thisComp.numLayers; i++){
  if (i == index) continue;
  if (thisComp.layer(i).scale[0] > 100){
    d = (thisComp.layer(i).scale[0] - 100) * thisComp.layer(i).width / 200;
    if (thisComp.layer(i).position[0] > position[0]){
      v -= [d,0];
    }else{
      v += [d,0];
    }
  }
}
v

Dan