Xeyes

[Kalleheikki Kannisto]

Use this for the iris position:

origin_x=576;// rest position X value, center point of eye
origin_y=390;// rest position Y value
eye_height = 120; // vertical radius or eyeball
eye_width =80; // horizontal radius of eyeball
offset_mult = .25; // decrease in eye movement
eye_proportion =eye_height/eye_width;
x0=thisComp.layer("Null 1").transform.position[0]-origin_x;//your null reference here
y0=thisComp.layer("Null 1").transform.position[1]-origin_y;//your null reference here
distance0 = Math.sqrt(x0*x0+y0*y0)*offset_mult;
distance = Math.min(distance0,eye_width);
if (distance0>eye_width){
distance_mult = distance/distance0;
}else{
distance_mult = 1
}

x=origin_x+distance_mult*x0*offset_mult;
y=origin_y+distance_mult*y0*offset_mult*eye_proportion;

[x,y]