Classes/Cart.m


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//
//  Cart.m
//  Cart Collect
//
//  Created by Starla Insigna on 8/9/11.
//  Copyright 2011 Four Island. All rights reserved.
//

#import "Cart.h"

@implementation Cart

@synthesize sprite, immobile;

- (id)initWithSprite:(CCSprite*)m_sprite
{
    self = [super init];
    
    if (nil != self)
    {
        sprite = m_sprite;
        immobile = NO;
    }
    
    return self;
}

- (void)tick
{
    if (!immobile)
    {
        // Move the cart based on acceleration gathered from accelerometer
        sprite.position = ccp(MIN(MAX(sprite.position.x+accelX, 16),464), sprite.position.y);
    }
}

- (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration
{
    static float prevY=0;
	
#define kFilterFactor 0.05f
	
	float accelY = -((float) acceleration.y * kFilterFactor + (1- kFilterFactor)*prevY);
	
	prevY = accelY;
	accelX = accelY * 750;
}

@end