The Final Drone Grid Game - Beginning Android 3D Game Development - page 352

The m_Active boolean array holds true for an element if the corresponding arena object in the
m_ArenaObjectSet is active and has to be rendered and updated.

private boolean[] m_Active = new boolean[MAX_ARENA_OBJECTS];

The m_ExplosionMinVelocity variable holds the minimum velocity for particles in an explosion
associated with this set of arena objects.

private float m_ExplosionMinVelocity = 0.02f;

The m_ExplosionMaxVelocity variable holds the maximum velocity for particles in an explosion
associated with this set of arena objects.

private float m_ExplosionMaxVelocity = 0.4f;

The Init() function initializes all the arena objects in this class to null, and the m_Active status is set
to false, which means it is inactive and not to be rendered, updated, or processed. (See Listing 10-1.)

Listing 10-1. Initializing the Arena Objects

void Init()
{
for (int i = 0; i < MAX_ARENA_OBJECTS; i++)
{
m_ArenaObjectSet[i] = null;
m_Active[i] = false;
}
}

The ArenaObjectSet constructor initializes the ArenaObject set by calling the Init() function.
(See Listing 10-2.)

Listing 10-2. The ArenaObjectSet Constructor

ArenaObjectSet(Context iContext)
{
m_Context = iContext;
Init();
}

The SaveSet() function saves the data for the ArenaObject set. (See Listing 10-3.)
The SaveSet() function does the following:

1. Retrieves a SharedPreferences object for the input parameter Handle by

calling the getSharedPreferences() function

Retrieves an Editor object by calling edit() on the SharedPreferences object
from Step 1

2.

Saves the values of the m_Active array to the shared preferences by creating
a unique handle consisting of the input parameter Handle, the “Active”
keyword, and the index i

3.