Point-and-click move to tile

Rather than clicking specific objects to indicate the target for our AI-controlled agent, we can create a grid of 3D Plane (tile) objects to allow the player to click any tile to indicate a destination for the AI-controller character. So, any location can be clicked, rather than only one of a few specific objects:

Getting ready

This recipe adds to the previous one, so make a copy of that project folder and do your work for this recipe with that copy.

For this recipe, we have prepared a red-outlined black square Texture image named square_outline.png in a folder named Textures in the 15_04 folder.

How...