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PORotating a sprite with Touch - Cocos2d
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  1. PORotating a sprite with Touch - Cocos2d
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    copied!<p>I know this question has been asked several times, trust me I have searched. I have found one answer to rotating a sprite with touch, but there has to be a simpler way.</p> <p>All I need is for my sprite to rotate with my touch. Max rotation 0 Minimum rotation 0.</p> <p>I know that I'll need a few checks. </p> <pre><code>int maxRot = 0; int minRot = 0; if (arrowRotation &gt; maxRot) { //do or don't do something } else if (arrowRotation &lt; minRot) { //do or don't do something } </code></pre> <p>Can someone lead me in the right direction to rotating a sprite with touch, with a minimun and maximum rotation?</p> <p>Here is the code that I think is to complicated or can be accomplished in a simpler way.</p> <pre><code>-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; //acquire the previous touch location CGPoint firstLocation = [touch previousLocationInView:[touch view]]; CGPoint location = [touch locationInView:[touch view]]; //preform all the same basic rig on both the current touch and previous touch CGPoint touchingPoint = [[CCDirector sharedDirector] convertToGL:location]; CGPoint firstTouchingPoint = [[CCDirector sharedDirector] convertToGL:firstLocation]; CGPoint firstVector = ccpSub(firstTouchingPoint, _arrow.position); CGFloat firstRotateAngle = -ccpToAngle(firstVector); CGFloat previousTouch = CC_RADIANS_TO_DEGREES(firstRotateAngle); CGPoint vector = ccpSub(touchingPoint, _arrow.position); CGFloat rotateAngle = -ccpToAngle(vector); CGFloat currentTouch = CC_RADIANS_TO_DEGREES(rotateAngle); //keep adding the difference of the two angles to the dial rotation arrowRotation += currentTouch - previousTouch; } </code></pre> <p>Thanks in advance!</p>
 

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