creating a endless parallax scrolling background in spritekit and objective c

//

//  cloneParallax.h

#import <SpriteKit/SpriteKit.h>

@interface cloneParallax : SKSpriteNode

{

    

}

-(id) initParallax:(float)PtotalWidth parallaxSpeed:(float)Pspeed parallaxY:(float)Py;

//properties

@property float PtotalWidth;

@property SKTexture *Ptexture;

@property float RXY;

@property float Pspeed;

@property float Py;

@property float clonewidth;

-(void)DrawParallax:(SKTexture*)Ptexture  scaleXY:(float)R;

-(void)DrawParallaxSprites:(NSMutableArray*)textureArray widthofSprite:(float)_width scaleXY:(float)R;

-(void) updateParallax:(CFTimeInterval)interval;

@end

//

//

//  cloneParallax.m

//  milkhunt

//

//  Created by Manish Chauhan on 26/12/13.

//  Copyright (c) 2013 skidos. All rights reserved.

//

#import "cloneParallax.h"

#import "sprite.h"

@implementation cloneParallax

{

     int numberofclones;

     SKSpriteNode *realsprite;

     sprite *realanimation;

}

-(id) initParallax:(float)PtotalWidth parallaxSpeed:(float)Pspeed parallaxY:(float)Py

{

    self=[super init];

    if(self)

    {

        

        _Py=Py;

        _PtotalWidth=PtotalWidth;

        _Pspeed=Pspeed;

    }

    return self;

}

//if you are looking for plain sprite parallax

-(void)DrawParallax:(SKTexture*)Ptexture  scaleXY:(float)R

{

    _RXY=R;

    _Ptexture=Ptexture;

    realsprite=[SKSpriteNode spriteNodeWithTexture:_Ptexture];

    _clonewidth=realsprite.size.width*_RXY;

    

    numberofclones=ceil((_PtotalWidth+_Pspeed)/realsprite.size.width);

    numberofclones++;

    [self fillParallax];

}

//if you are looking for animated sprite parallax such as water or animated clouds etc

-(void)DrawParallaxSprites:(NSMutableArray*)textureArray widthofSprite:(float)_width scaleXY:(float)R

{

    _RXY=R;

    realanimation=[[sprite alloc] init];

    

    [realanimation runAnimation:textureArray type:@"loop"];

    

    _clonewidth=_width;

    numberofclones=ceil((_PtotalWidth+_Pspeed)/_width);

    numberofclones++;

    [self fillParallaxSprites];

    

}

-(void)fillParallaxSprites

{

    for(int i=0;i<numberofclones;i++)

    {

        

        sprite *clonesprite=[realanimation copy];

        clonesprite.speed=16;

        //clonesprite.xScale=clonesprite.yScale=_RXY;

        clonesprite.position=CGPointMake(i*(_clonewidth-1), _Py);

        [self addChild:clonesprite];

    }

    

}

-(void)fillParallax

{

    

    for(int i=0;i<numberofclones;i++)

    {

        SKSpriteNode *clonesprite=[realsprite copy];

        clonesprite.anchorPoint=CGPointMake(0, 0);

        clonesprite.xScale=clonesprite.yScale=_RXY;

        clonesprite.position=CGPointMake(i*(_clonewidth), _Py);

        [self addChild:clonesprite];

        

    }

    

}

-(void) updateParallax:(CFTimeInterval)interval

{

    

    

    float oldX=(self.position.x-_Pspeed);

    float newX = (float)((int)oldX % (int)_clonewidth);

    

    self.position=CGPointMake(newX, _Py);

    

}

@end

//adding clone parallax to your main class

@implementation milkhuntStartScene

{

    cloneParallax *waterParallax;

}

    waterParallax=[[cloneParallax alloc] initParallax:1024 parallaxSpeed:2 parallaxY:30];

    

   // [waterParallax DrawParallax:your texture scaleXY:1];//for simple sprite

  //  [waterParallax DrawParallaxSprites:your texture array widthofSprite:width of each texture scaleXY:1];//for animated sprite

    

    [self addChild:waterParallax];

//update clone parallax with speed

  -(void)update:(NSTimeInterval)currentTime

{

    [waterParallax updateParallax:currentTime];

}