Im trying to, in cocos2d for the iPhone, move a CCSprite (in this case "player" up and down (the app is in landscape). How can I accomplish this? I have been unable to do so. ex.
-(void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
player.position.x = acceleration.x * 10;
NSLog(@"Accelerometer x value is %f\n", acceleration.x);
}
You can't change position components like x and y directly. You have to set a new position instead, by assigning a CGPoint to the position property. Something like this:
[player setPosition:ccp( acceleration.x * 10, player.position.y )];
If you want to move the sprite constantly in the direcion of acceleration, you should increment the x value instead.. something like this:
[player setPosition:
ccp( player.position.x + acceleration.x * 10, player.position.y )];
Technical background: You have to use setPosition or position = ccp(xValue, yValue), because Cocos2D keeps a flag internally that indicates if the position has changed and if the sprite should be moved. Setting components like x or y directly won't do anything, because the flag only changes when you invoke the position setter.
[player.position MAX(0.0f, MIN(screenWidth, player.position.x))];
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– Coder404
May 12 '12 at 14:13
[player setPosition: ccp(MAX(0.0f, MIN(screenWidth, player.position.x)), player.position.y)]... and ofc you'll have to replace screenWidth with the actual screen-width
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– bummzack
May 12 '12 at 18:02
