-
Circular motion y axis and stop it
When i animate the rate from value to 0, the motion is backward, i wont stop it, any help?
(sorry my english)The position expression:
radius=effect(“Radio”)(“Slider”);
rate=effect(“Frecuencia”)(“Slider”);
offset=effect(“Offset”)(“Slider”);
angle=time*rate+offset;
x=radius*Math.cos(degreesToRadians(angle));
y=transform.position[1];
z=radius*Math.sin(degreesToRadians(angle));
centre=thisComp.layer(“Null 1”).transform.position;
add(centre,[x,y,z])Adobe After Effects Expressions -
5 Replies
-
-
Thanks Mr. Ebberts
-
Buf, i can’t combinate both expressions…
-
I haven’t tested this, so it may not be quite right, but it would be something like this:
radius=effect("Radio")("Slider");
spd = effect("Frecuencia")("Slider");
offset=effect("Offset")("Slider");
n = spd.numKeys;
if (n > 0 && spd.key(1).time < time){
accum = spd.key(1).value*(spd.key(1).time - inPoint);
for (i = 2; i <= n; i++){
if (spd.key(i).time > time) break;
k1 = spd.key(i-1);
k2 = spd.key(i);
accum += (k1.value + k2.value)*(k2.time - k1.time)/2;
}
accum += (spd.value + spd.key(i-1).value)*(time - spd.key(i-1).time)/2;
}else{
accum = spd.value*(time - inPoint);
}
angle = accum + offset;
x=radius*Math.cos(degreesToRadians(angle));
y=transform.position[1];
z=radius*Math.sin(degreesToRadians(angle));
centre=thisComp.layer("Null 1").transform.position;
add(centre,[x,y,z])
Dan
-
OOOoooo, Thanks for your quick reply, always helping.
Reply to this Discussion! Login or Sign Up