Ian's bobble Head Xmas Card

gistfile1.txt

// Position Variables
    var x = 0;
    var y =0;
    var initial_x = 169;
    var initial_y = 111;
    
    // Speed - Velocity
    var vx = 0;
    var vy = 0;

    // Acceleration
    var ax = 0;
    var ay = 0;

    // spin
    var kx = 0;
    var ky = 0;
    
    var delay = 0.1;
    var vMultiplier = 0.5;

    window.ondevicemotion = function(event) {
      ax = event.accelerationIncludingGravity.x;
      ay = event.accelerationIncludingGravity.y + 9.5;

    }

    setInterval(function() {
      kx = -0.05 * x;
      ky = -0.2 * y;
      
      acceleration_x = ax /5.0;
      acceleration_y = ay /5.0;
      
      var x_dampen = -0.1 * vx ;
      var y_dampen = -0.1 * vy ;
      
      vx = vx + acceleration_x + kx + x_dampen;
      x = x + vx;

      vy = vy + acceleration_y + ky + y_dampen;
      y = y + vy;

      abs_x = Math.abs( x );
      //$("#text").html( ay + "<br>" + acceleration_y);
      
      $("#ian_head").css("left", (initial_x  + x) + "px");
       $("#ian_head").css("top", (initial_y  - y) + "px");
      //$("#ian_head").css("top", (initial_y  + ( abs_x /5.0)) + "px");

    }, delay);