Expression (x,y) compairson to + 1 frame (x,y) = x degrees

[Dan Ebberts]

I don’t think you’ve provided nearly enough information. You can’t just convert pixels to degrees without a point of reference. Is the reference point the camera? So you have a point that is moving in 3D space from one frame to the next and you want to caluclate how much you have to rotate the camera to track it, is that correct? If so, why not just attach the camera’s POI to the point? What are you trying to do, exactly? 🙂

Dan

[Darby Edelen]

[Ganer13] “Also if someone has done this before, I’d like the scrip that also return the number of pixels moved between two points”

This one is fairly simple if you only want the distance between the two points:


p1 = thisComp.layer("Layer One").transform.position;
p2 = thisComp.layer("Layer Two").transform.position;

length(p1, p2); //Returns the distance from p1 to p2


Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA

[Ganer Stewart]

dan,

What I’m trying to do is generate an angle of movement in 2d space. if an object is at (0,0) and then moves to (10,10) I’m trying to return a value of the direction of movement. This I’ll attach to the variable (degrees) in the “Directional blur” effect. This I’m hoping will mimic the natural “Smearing” of a camera shake. Then I’ll attach the “length of movement” to the amount of blur in “directional blur” effect. Does that make more sense?

gs

[Dan Ebberts]

Yup. Try this:

P1 = [0,0];
P2 = [10,10];

delta = P2 – P1;
radiansToDegrees(Math.atan2(delta[1],delta[0]));

Dan

[Dan Ebberts]

I think you have to add 90 degrees to get it to work right with the directional blur filter:

P1 = [0,0];
P2 = [10,10];

delta = P2 – P1;
90 + radiansToDegrees(Math.atan2(delta[1],delta[0]));

Dan