Building the Game

The Black Hole game is based on most of the code we’ve developed in each of the previous hours of the book, and there really is no single previous hour that gets more credit than others since each hour has built upon the hours that came before. Let’s dig into the game by going over the major sections and get something up and running fairly quickly. Then we’ll continue our work on the game into the following hour, where it will get some polish and fine-tuning of the fun factor.

Gravity Well Regions

There are three regions around the black hole that affect game objects. The outer gravity well affects objects passing by, drawing them toward the black hole with relatively light force. This force is increased by an equal amount in the next two inner regions, with each region generating an equivalent gravity “tug” on objects. But the cumulative effect of all three gravity wells in the inner region of the black hole will cause objects to become hopelessly trapped.