cocos2d: scrolling TMXLayer is stuttering

Question

I am scrolling a TMXLayer in the background, vertically down. I multiply the distance moved by delta time in the update, so it should be smooth. But it isn't. Code snippet:

void GLayer::update(float delta) {
    //...
    myTMXLayer->setPosition(ccp(0,lastPosition-ammount*delta));
    //...
}

Could someone help me to get really smooth scrolling?

Answer 1

I found the source of the problem. If you move the layers slower than the fps, it will stutter. I have 60.0 fps, and I move the layers with 62.0 fps. I'm also casting the new coordinates to int, because I had page tear.