Fill in the blanks, Stevenson Symposium

lunar-lander-update.m

-(void)update:(ccTime)dt
{
	// Only run the update if we haven't already landed
	if(!didLand)
	{

		// We accelerate downward at 10 pixels per second per second.
		// "dt" stands for "delta time" is how much time has passed since the last time this function 
		// was called, so it's around 0.05 seconds
		// Using our number 10, and our number dt, how do we create the value that we're going to 
		// use to change our velocity?
		// How much should the velocity change every 0.05 seconds, if we're trying to make it change 
		// by 10 pixels every second?
		float velocityChange = _____;


		// Now how do we use the value we made, velocityChange to change our variable currentVelocity?
		currentVelocity = _____;
		
		// If the player is touching the screen, that means they want the thruster to be on.
		// When the thruster is on, the spaceship should push against gravity
		if(isPushingThruster)
		{
			float thrusterVelocityChange = _______;
			
			// Now we apply thrusterVelocityChange to the ship's currentVelocity
			currentVelocity = _____;
		}
		
		// What do we do here to make the ship move?
		// We can use our variables position and currentVelocity
		_____;
		
		// How do we know when to stop the ship from moving?
		if(_____)
		{
			// Now we know that we landed, so set that variable to YES so that the game (the other 
			// file) knows about it and can bring up the "restart" button.
			didLand = YES;
			
			// What should we do with the position of the ship to stop it from keeping going downward?
			_____;

			// How do we find out if we crashed or if we won? Hint: This depends on how fast the 
			// ship was going when it hit the surface.
			if(_____)
			{
				// We crashed!
				didCrash = YES;
			}
		}
	}
	
}