A path engine as a datapack for minecraft.

Let your entities move in a simple and efficient way. Place signs which are considered as waypoints under the path and let the entity run from one sign to another in a straight line. They can go up and down half slabs & stairs. The entity will get the new direction from the reached sign and will change direction.
The entities can go in 4 directions:

North
  1
4 0 2          # 0 is standing still
  3
South

Check the video out to see how easy it is to set up!

1. Download the datapack and put it in your datapack folder
2. Place down signs under a path to create waypoints
3. Give your entity the score pe_direction from 1 to 4 to get it moving

These are the lines for the waypoint signs.

Pathengine              # needed on every waypoint
<direction>             # a direction from 0 to 4
f<function_id>          # a function id
<empty/doesn't matter>

When entity reached this sign the entity will change direction to west and will run the function with the id 0 upon reaching the waypoint.

Call your own functions upon entitys reaching waypoints:

1. Edit the file function_call.mcfunction and add your path to your functions in there and uncomment the needed line
2. Create a waypoint sign with the third line f<functionID>. For example f0 to call the first function in function_call.mcfunction

Give yourself the tag pe_noannouncement so you won't get the loaded message on the reload command.