game-loop

I'm making an android game and am currently not getting the performance I'd like. I have a game loop in its own thread which updates an object's position. The rendering thread will traverse these objects and draw them. The current behavior is what seems like choppy/uneven movement. What I cannot explain is that before I put the update logic in its own thread, I had it in the onDrawFrame method, right before the gl calls. In that case, the animation was perfectly smooth, it only becomes choppy/uneven specifically when I try to throttle my update loop via Thread.sleep. Even when I allow the

I find that most game development requires a main game loop, but I don't know why it's necessary. Couldn't we implement an event listener and respond to every user action? Animations (etc.) could then be played when a event occurs. What is the purpose of a main game loop? The argument that you "need a loop because otherwise what calls the event listener" does not hold water. Admittedly on any mainstream OS, you do indeed have such a loop, and event listeners do work that way, but it is entirely possible to make an interrupt driven system that works without any loops of any kind. But you still

I'm new to JavaFX and am trying to write a game where an animated 2D character walks across the screen (for example like the original Legend of Zelda game). I had done this in Swing, by creating my own Sprite class and overriding the paintComponent() method in Swing, and putting my own g2d.drawImage(...); call in there, where it would copy the correct subframe from a Sprite to the correct x,y destination in a JPanel, thus achieving the movement of an animated (walking) 2D image across the screen. How can I do this in JavaFX? I found this excellent example on how to create a sprite: http://blog