How to make tracer tool?

[ANGRYBIRDSFILMSALT]

I’m just asking how to make an accurate tracer tool, it draws a line wherever the object goes, then fades after a few seconds.

[RobinsonX]

@ANGRYBIRDSFILMSALT This can either be simple or complex depending on the path of your object.

Assuming it is a straight path, you can use an Empty Object for it. Make the anchor of the object to be 50, 0 so the bottom center of the object will be used in transformations.

1. Calculate the distance from point A to point B.
2. Calculate the direction from point A to point B.
3. Now move the empty object to point A.
4. Rotate the object to the direction given in step 2.
5. Now rescale the object so that the y matches the distance given in step 1. You can change x to any width you like - this will be the stroke length.
6. Now you should have a line connecting from point A to point B.

You can use this every time an object is moving to a point. However, do note that distance is affected by the zoom; it'll be normal at 100% zoom but it will double when zoom is 50%.