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Position to Path

The Position to Path Generator converts a trajectory, represented by the evolution of a 2D parameter over time, into a Path.

To add it to a Path Group, click on the "+" button next to it and select Position to Path.

You can add a Stroke Style to visualize the Path created by this Generator.

Keyframing the Animated Position Parameter

Selecting this Generator in the Selection Overview will display its parameters in the Properties section. The first parameter is Animated Position.

Creating 3 keyframes at different times on this parameter will draw a Path. Its length will always be constant, no matter the current time, because this Path represents the trajectory created by these 3 keyframes, just like a Motion Path represents layer trajectory.

All existing keyframes on this parameter are accumulated to draw the Path, even the ones outside of the composition range. If a keyframe exists at 20 seconds and you decide to reduce the composition duration to 10 seconds, this keyframe will still be used to draw the Path.

Dynamically Draw Layer Trajectory

Creating keyframes on the Animated Position parameter is not a common example. It's more common to connect it to another parameter, such as Layer Position.

To demonstrate this, we need an additional 2D layer with Position keyframes. We want to convert this layer's trajectory into a Path, then draw it with the Stroke Style.

  • Select the layer
  • In the Properties section, right-click on Position and select Copy
  • Select the Shape Layer, then click on the Position to Path Generator
  • In the Properties section, right-click on Animated Position and select Paste (Linked)

A live link will be established between the Position keyframes and Path Generator. Changing the layer's Motion Path will automatically change the generated Path.

Note

All of these operations can also be performed in the Timeline, but the Inspector offers quicker access to parameters.

Not Only for the Position Parameter

The example shown here, where the layer Position draws a trajectory, is the most understandable because it's the most visual. But bear in mind that any 2D parameter can be connected to the Animated Position parameter.

Examples include:

  • Offset of a Start Path Generator
  • God Rays Position Modifier
  • Center of a 2D Tracker
  • Etc. ...