An editor extension to add 100 randomly located copies of a prefab with one menu click

Sometimes we want to create "lots" of pickups, randomly in our scene. Rather than doing this by hand, it is possible to add a custom menu and item to the Unity editor, which, when selected, will execute a script. In this recipe, we create a menu item that calls a script to create 100 randomly positioned star pickup prefabs in the Scene.

Getting ready

This recipe assumes you are starting with the project Simple2Dgame_SpaceGirl setup from the first recipe in this chapter.

How to do it...

To create an editor extension to add 100 randomly located copies of a prefab with one menu click, follow these steps:

1. Start with a new copy of mini-game Simple2Dgame_SpaceGirl.
2. In the Project panel, create a new folder named Prefabs. Inside this new folder, create a new empty prefab named prefab_star. Populate this prefab by dragging GameObject star from the Hierarchy panel over prefab_star in the Project panel. The...