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POHow to make a sprite follow a trail?
 

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  1. POHow to make a sprite follow a trail?
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    <p>I'm making a game where the player draws a line and then a sprite should follow and run on it. I have a mutable array and also a draw method which works well. but I'm having trouble figuring out a way to move the sprite. I have tried different approaches but I can't get the iterator to work.</p> <p>It's supposed to work by iterating through the array. which is populated with CGPoint locations previously stored. I try to move the sprite in ccTouchedEnded but it highlights [toucharray objectAtIndex:0] and says "passing 'id' to parameter of incompatible type 'CGPoint (aka 'struct CGPoint')"</p> <pre><code> -(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //remove objects each time the player makes a new path [toucharray removeAllObjects]; } -(void) ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [ touches anyObject]; CGPoint new_location = [touch locationInView: [touch view]]; new_location = [[CCDirector sharedDirector] convertToGL:new_location]; CGPoint oldTouchLocation = [touch previousLocationInView:touch.view]; oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation]; oldTouchLocation = [self convertToNodeSpace:oldTouchLocation]; // add touches to the touch array [toucharray addObject:NSStringFromCGPoint(new_location)]; [toucharray addObject:NSStringFromCGPoint(oldTouchLocation)]; } -(void)draw { glEnable(GL_LINE_SMOOTH); for(int i = 0; i &lt; [toucharray count]; i+=2) { CGPoint start = CGPointFromString([toucharray objectAtIndex:i]); CGPoint end = CGPointFromString([toucharray objectAtIndex:i+1]); ccDrawLine(start, end); } } -(void) ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ // here is the line I can't get to work to move the sprite _sprite.position = ccpAdd(ccpMult([toucharray objectAtIndex:0], progress), ccpMult([toucharray objectAtIndex:0+1], 1-progress)); } </code></pre>
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      1. POHow to make a sprite follow a trail?
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      1. VTUpMod
    1. COMaybe my Line-Drawing Starterkit will interest you? Objects follow a drawn path using cocos2d actions. http://www.learn-cocos2d.com/store/line-drawing-game-starterkit/
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      1. POHow to make a sprite follow a trail?
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