[Dan Ebberts]

Yes, value is the key. As an example, this expression will cause a layer to orbit its keyframed position:

r = 50; //radius (in pixels)
f = 1; //orbits per second

angle = time*Math.PI*2*f;
value + [Math.sin(angle)*r, -Math.cos(angle)*r]

The important point is that whatever you add to value needs to be a 2-dimensional quantity. Normally it will be in the form

value + [a,b]

where ‘a’ will get added to the layer’s x position and ‘b’ will get added to the layer’s y position.

Hope that helps.

Dan

[Dan Ebberts]

Mike,

Nice job. Send me an email when you have a minute.

Dan

[Dan Ebberts]

Mike,

Nice job. Send me an email when you have a minute.

Dan

[Dan Ebberts]

Try this one:

rate = 360; //degrees per second
if (thisComp.numLayers > 1){
stopAngle = 360/(thisComp.numLayers – 1);
myAngle = (index – 1)*stopAngle;
}else{
stopAngle = 0;
myAngle = 0;
}
currAngle = time*rate;
if (currAngle > 360){
linear(currAngle – 360,myAngle,360,myAngle,360)
}else{
linear(currAngle,0,myAngle,0,myAngle);
}

Dan

[Dan Ebberts]

Try this one:

rate = 360; //degrees per second
if (thisComp.numLayers > 1){
stopAngle = 360/(thisComp.numLayers – 1);
myAngle = (index – 1)*stopAngle;
}else{
stopAngle = 0;
myAngle = 0;
}
currAngle = time*rate;
if (currAngle > 360){
linear(currAngle – 360,myAngle,360,myAngle,360)
}else{
linear(currAngle,0,myAngle,0,myAngle);
}

Dan

[Dan Ebberts]

Like this:

temp = thisComp.layer(“Red Solid 1”).transform.rotation;
[value[0], temp]

Dan

[Dan Ebberts]

Like this:

temp = thisComp.layer(“Red Solid 1”).transform.rotation;
[value[0], temp]

Dan

[Dan Ebberts]

An expression like this for the flare center should do it:

L = thisComp.layer(“Picture Layer”);
L.toComp(L.effect(“Point Control”)(“Point”))

Dan

[Dan Ebberts]

An expression like this for the flare center should do it:

L = thisComp.layer(“Picture Layer”);
L.toComp(L.effect(“Point Control”)(“Point”))

Dan

[Dan Ebberts]

A little late to the party, but here’s a fun thing to try. Add this expression to the diffuse and specular material options of your 3D layer:

decay = .001; // speed of falloff
d100pct = 200; // distance from light where falloff begins

L = thisComp.layer(“Light 1”);

d = length(L.position,position);
if (d < d100pct){ value; }else{ value/Math.exp((d-d100pct)*decay); } The first parameter has the most effect on how fast layers get dark as they move away from the light. The advantages of this approach are that the layers don't become transparent and the effect is independent for each layer since the intensity of the light itself is not affected. Dan