This iExpression is applied to the orientation of a 3D layer. It rotates the layer such that it always "looks" towards a given line. Each layer looks at the point of the line that is closest to it. In other words, the direction in which the layers look is perpendicular to the direction of the line. The line has an infinite length and is given by two (arbitrary) points on the line. The rotation can still be adjusted using keyframes as usual. You can, for example, align layers on the surface of a cylinder by choosing as line the axis in the middle of the cylinder.

  • Line Point 1

    is the first point on the line at which the layer should "look".

  • Line Point 2

    is the second point on the line at which the layer should "look".

  • Flip

    flips the rotation such that the layer does not look at the line but looks away from it (i.e. turns its back on it).

  • Look From
    Look From

    if you choose 'other point' here, the layer looks not from its own position but as if it was located at some other position. If you want, for example, that the layers looks in exactly the same direction as another layer which uses this iExpression, then you can simply link this other layer's position to 'other point'.

    Other Point

    is the point at which the layer should "look" when the option 'other point' has been choosen for 'Look From'.

Look At Line 3D iExpression

by default applied to: 
orientation
can be applied to: 
3D properties
iExpression Bundle: 

What are iExpressions?

iExpressions are After Effects expressions with an easy to use interface.

more infos

Comments

Hi - Following your spiral 3d tutorial, I am stuck animating the 'Look towards' expression - it will not create a slider, but insists I jave not selected a property - that is, it does not like the Null Object as a link...How did you animate the orientation of the layers in the demo?

Thanks!

Hi Daniel,
make sure to select not just the null layer, but the position property of the null layer before creating the link. Also make sure it is a 3d layer when the property you want to link to it is a 3d property.

Cheers,
Mathias

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