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    <pre><code>#import "cocos2d.h" @interface CClineSprite : CCLayer { CCRenderTexture * renderTarget; NSMutableArray * pathArray; CCSprite * pathBrush; CGPoint prePosition; } -(void)setLinePosition:(CGPoint)position; -(void)setLineOpacity:(GLubyte) anOpacity; -(void)setLineScale:(float) scale; -(void)setLineColor:(ccColor3B) color; @end #import "CClineSprite.h" @implementation CClineSprite - (id) init { self = [super init]; if (self) { CGSize s = [[CCDirector sharedDirector] winSize]; renderTarget = [CCRenderTexture renderTextureWithWidth:s.width height:s.height]; [renderTarget setPosition:ccp(s.width/2, s.height/2)]; [self addChild:renderTarget z:1]; pathBrush = [CCSprite spriteWithFile:@"dots.png"]; pathBrush.color = ccWHITE; [pathBrush setOpacity:100]; [pathBrush setScale:0.5]; pathArray = [[NSMutableArray alloc]init]; } return self; } -(void)setLineOpacity:(GLubyte) anOpacity { [pathBrush setOpacity:anOpacity]; } -(void)setLineScale:(float) scale { [pathBrush setScale:scale]; } -(void)setLineColor:(ccColor3B) color { [pathBrush setColor:color]; } -(void)setLinePosition:(CGPoint)position { [pathArray addObject:[NSValue valueWithCGPoint:position]]; [self renderPath]; } - (void) renderPath { [renderTarget clear:0 g:0 b:0 a:0]; [renderTarget begin]; for (int i = 0; i &lt; pathArray.count-1;i++) { CGPoint pt1; CGPoint pt2; [[pathArray objectAtIndex:i] getValue: &amp;pt1]; [[pathArray objectAtIndex:i + 1] getValue: &amp;pt2]; float distance = ccpDistance(pt1, pt2); if (distance &gt; 1) { int d = (int)distance; for (int i = 0; i &lt; d; i += 10) { float difx = pt2.x - pt1.x; float dify = pt2.y - pt1.y; float delta = (float)i / distance; [pathBrush setPosition:ccp(pt1.x + (difx * delta), pt1.y + (dify * delta))]; [pathBrush visit]; } } } [renderTarget end]; } @end </code></pre> <p>USAGE:</p> <pre><code>CClineSprite* streak = [CClineSprite node]; [self addChild:streak z:999]; [streak setLinePosition:associatedTurtleObject.position]; [streak setLineScale:0.4]; </code></pre> <p>To dynamically update or extend the line just use</p> <pre><code>[streak setLinePosition:ccp(x,y)]; </code></pre> <p>Hope this will give you more flexibility for use</p>
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    1. POHow to use openGL line drawing in cocos2d
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    1. USAlok Singh
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    1. COUSAGE: CClineSprite* streak = [CClineSprite node]; [self addChild:streak z:999]; [streak setLinePosition:associatedTurtleObject.position]; [streak setLineScale:0.4]; To dynamically update or extend the line just use [streak setLinePosition:ccp(x,y)]; Hope this will give you more flexibility for use
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