Beginner C++ Game Programming Tutorial 5

Comparison and Boolean logic operators. Operators galore! Make if statements great again! Let the int dick measuring contests begin!

Concepts Taught

• Comparison operators (>, <, ==, >=, <=, !=)
• Boolean operators (&&, ||, !)
• Using parentheses to change order of evaluation (effectively changing what an operator works on)

Video Timestamp Index

Coming soon!

Homework

Draw two targeting boxes, one controlled with the arrow keys and one stationary, and have the color of the mobile targeting box change whenever the targeting boxes overlap.

The solution will be given in a future video.

Solution Errata

Read the below (click Expand) only after attempting the problem yourself.

[Expand]

In the solution (3:32), Chili declares (in Game) a bool variable controlIsPressed to signal that the shape should be changed. First of all, the key being pressed is the SHIFT key, so this is confusing.

Secondly, a better name for this variable would have been isBoxMode, since the drawing code doesn't really care what key was actually pressed, all it wants to know is what shape it should be drawing. This doesn't affect the behavior of the program in any way, but it makes it more logically coherent.

See also

• Next in series (Tutorial 6)
• Beginner C++ Game Programming Series