client physics loop

physicsLoop.js

function updatePhysics() {
    // 1: updates self position and direction        
    if (!pongR.updateTimestamp) { // The first time this loop runs, pongR.updateTimestamp will be undefined
        pongR.updateTimestamp = new Date().getTime();
    }
    else {
        var now = new Date().getTime();
        pongR.deltaTime = (now - pongR.updateTimestamp) / 1000;
        //console.log("Delta time: " + pongR.deltaTime + ". Now: " + now + ", previous update: " + pongR.updateTimestamp);
        pongR.updateTimestamp = now;
    }

    pongR.me.topLeftVertex = computeNewClientPosition();

    // 2: update ball position
    var newPosition = updateBallPosition(pongR.game.ball.angle, pongR.game.ball.position, pongR.deltaTime, pongR.settings.BALL_FIXED_STEP);
    pongR.game.ball.position = newPosition;
    // 2: check collision
    checkForCollisionsAndUpdateBallState();
};