Challenge: Safe Landing - Additional Condition

Cocoa Programming for OS X (5th Edition) 3. Structures and Classes
1

Pg 59: Challenge Safe Landing:
I recommend adding this additional condition to the problem:
Do not deploy the parachute if thrustTimeRemaining > 0

While not a rocket scientist, even I know that deploying your parachute while the engine is running is bad news.

2

Sound advice, mmmayer. :slight_smile:

3

If thrustTimeRemaining > 0, then won’t velocity be positive? As the question states, you want to deploy the parachute after the velocity has turned negative, i.e. the Particle is moving downwards.