Select on mouse click

- [Voiceover] So now we'll create a mouse manager.…This will check for mouse clicks.…Particularly, it will check to see which items…have been clicked on in the 3D space.…If that item is interactive, it'll call the Select function.…It'll also deselect any items that were previously selected,…will also handle multi-select with the Shift key.…It might sound like a lot, but we've…already done some of this architecture.…So, to get started, I'm gonna create a new script.…Now let's edit the Mouse Manager.…I know I'm gonna want a generic collection,…so I'm gonna add Generic right now.…

Next, I need a list, a list of the interactives,…all the selections we have.…So I'm gonna say, "private List<Interactive>…"Selections = new".…I don't need to initialize anything,…so I'm gonna get rid of the Start function.…In the Update, I'm basically gonna wanna see…where I can escape the Update function as soon as I can,…so as not to waste any additional processing.…So the first thing I'll check for, is if the user…isn't clicking the mouse button, then ignore this.…