Can not comprehend how to separate accelerometer class

[Rifts]

Hey All!

I'm trying to put my accelerometer into its own class but I can not comprehend how to do this.
If my code for my accelerometer is this.

-(void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
	// controls how quickly velocity decelerates (lower = quicker to change direction)
	float deceleration = 0.4f;
	// determines how sensitive the accelerometer reacts (higher = more sensitive)
	float sensitivity = 6.0f;
	// how fast the velocity can be at most
	float maxVelocity = 100;
	// adjust velocity based on current accelerometer acceleration
	playerVelocity.x = playerVelocity.x * deceleration + acceleration.x * sensitivity;
	playerVelocity.y = playerVelocity.y * deceleration + acceleration.y * sensitivity;
	// we must limit the maximum velocity of the player sprite, in both directions
	if (playerVelocity.x > maxVelocity)
	{
		playerVelocity.x = maxVelocity;
	}
	else if (playerVelocity.x < - maxVelocity)
	{
		playerVelocity.x = - maxVelocity;
	}

	if (playerVelocity.y > maxVelocity)
	{
		playerVelocity.y = maxVelocity;
	}
	else if (playerVelocity.y < - maxVelocity)
	{
		playerVelocity.y = - maxVelocity;
	} 

}

-(void) gameOn:(ccTime)delta
{

	// Keep adding up the playerVelocity to the player's position
	CGPoint pos = player.position;
	pos.x -= playerVelocity.y;
	pos.y += playerVelocity.x;

	// The Player should also be stopped from going outside the screen
	CGSize screenSize = [[CCDirector sharedDirector] winSize];
	float imageWidthHalved = player.contentSize.width * 0.5f * 0.5f;
	float leftBorderLimit = imageWidthHalved;
	float rightBorderLimit = screenSize.width - imageWidthHalved;
	// preventing the player sprite from moving outside the screen left and right
	if (pos.x < leftBorderLimit)
	{
		pos.x = leftBorderLimit;
		playerVelocity = CGPointZero;
	}
	else if (pos.x > rightBorderLimit)
	{
		pos.x = rightBorderLimit;
		playerVelocity = CGPointZero;
	}
	float imageHeightHalved = [player texture].contentSize.height * 0.5f * 0.5f;
	float topBorderLimit = imageHeightHalved;
	float bottomBorderLimit = screenSize.height - imageHeightHalved;
	// preventing the player sprite from moving outside the screen top and btm
	if (pos.y < topBorderLimit)
	{
		pos.y = topBorderLimit;
		playerVelocity = CGPointZero;
	}
	else if (pos.y > bottomBorderLimit)
	{
		pos.y = bottomBorderLimit;
		playerVelocity = CGPointZero;
	}
	// assigning the modified position back
	player.position = pos;

I don't understand how to "link" it to my character because having this in its own class can not access the "playerVelocity" or "player" objects.

I hope that makes sense.

Thanks

[Stinkee2]

I'm not familiar enough with Obj-C to give you any code, but just do something like this:

Make a class with floating point X, Y, and Z values, then create an instance of this class in your class there that has the didAccelerate and gameOn functions. Then in the didAccelerate function update the X, Y, and Z values of the class instance. Then just access them from wherever. Or you could go as far as putting a pointer to your class with the gameOn function in the accelerometer class and add an update function that modifies the player and playerVelocity variables. In C++ this would look something like this, I'm sure you'll be able to take something from it even if you don't know C++.

class Game; //Forward declaration
class AccelerationVector
    {
        public:
            void Update(Game *G)
                {
                     G->Player.Velocity += Vector3(X,Y,Z);
                     G->Player.Position += G->Player.Velocity;
                     //Whatever else you want to do with the player
                }
            float X,Y,Z;
    };

class Game
    {
        public:
            void didAccelerate(Acceleration)
                {
                     AccVec.SetAcceleration(Acceleration);
                }
            void gameOn()
                {
                     //Updates players velocity and position and stuff
                     AccVec.Update(this);
                }
            AccelerationVector AccVec;
    };

I'm not sure I understood your question though, I hope this helps.

[XcodeMagic]

go on youtube and type in "simple iphone game eagle11" he made a 10- part tutorial and it shows you the exact code to use to work the accelerometer in a way simpler way that you have.